+++ /dev/null
-commit b6a6cd703ffefa6352249fb01f4da28d85d17306
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu Jun 4 11:45:17 2015 -0400
-
- fix dynamic linker regression processing R_*_NONE type relocations
-
- commit f3ddd173806fd5c60b3f034528ca24542aecc5b9 inadvertently removed
- the early check for "none" type relocations, causing the address
- dso->base+0 to be dereferenced to obtain an addend. shared libraries,
- (including libc.so) and PIE executables were unaffected, since their
- base addresses are the actual address of their mappings and are
- readable. non-PIE main executables, however, have a base address of 0
- because their load addresses are absolute and not offset at load time.
-
- in practice none-type relocations do not arise with toolchains that
- are in use except on mips, and on mips it's moderately rare for a
- non-PIE executable to have a relocation table, since the mips-specific
- got processing serves in its place for most purposes.
-
-commit 585ba14df4799d50ec9682ce75825d2eafec2a6a
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed Jun 3 02:00:44 2015 -0400
-
- add additional Makefile dependency rules for rcrt1.o PIE start file
-
-commit 2b4fcfdacf93c3dfd6ac15e31790a9e154374679
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 28 23:08:12 2015 -0400
-
- fix failure of ungetc and ungetwc to work on files in eof status
-
- these functions were written to handle clearing eof status, but failed
- to account for the __toread function's handling of eof. with this
- patch applied, __toread still returns EOF when the file is in eof
- status, so that read operations will fail, but it also sets up valid
- buffer pointers for read mode, which are set to the end of the buffer
- rather than the beginning in order to make the whole buffer available
- to ungetc/ungetwc.
-
- minor changes to __uflow were needed since it's now possible to have
- non-zero buffer pointers while in eof status. as made, these changes
- remove a 'fast path' bypassing the function call to __toread, which
- could be reintroduced with slightly different logic, but since
- ordinary files have a syscall in f->read, optimizing the code path
- does not seem worthwhile.
-
- the __stdio_read function is also updated not to zero the read buffer
- pointers on eof/error. while not necessary for correctness, this
- change avoids the overhead of calling __toread in ungetc after
- reaching eof, and it also reduces code size and increases consistency
- with the fmemopen read operation which does not zero the pointers.
-
-commit b6e7c664677ab7c77f183b8c41105f2be519800c
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 28 15:37:23 2015 -0400
-
- add missing legacy LFS64 macros in sys/resource.h
-
- based on patch by Felix Janda, with RLIM64_SAVED_CUR and
- RLIM64_SAVED_MAX added for completeness.
-
-commit fc431d3f76bb9bde34a89e4a3e4d0c27de959855
-Author: Shiz <hi@shiz.me>
-Date: Thu May 28 05:52:22 2015 +0200
-
- configure: work around compilers that merely warn for unknown options
-
- some compilers (such as clang) accept unknown options without error,
- but then print warnings on each invocation, cluttering the build
- output and burying meaningful warnings. this patch makes configure's
- tryflag and tryldflag functions use additional options to turn the
- unknown-option warnings into errors, if available, but only at check
- time. these options are not output in config.mak to avoid the risk of
- spurious build breakage; if they work, they will have already done
- their job at configure time.
-
-commit aeeac9ca5490d7d90fe061ab72da446c01ddf746
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed May 27 15:54:47 2015 -0400
-
- implement fail-safe static locales for newlocale
-
- this frees applications which need to make temporary use of the C
- locale (via uselocale) from the possibility that newlocale might fail.
-
- the C.UTF-8 locale is also provided as a static locale. presently they
- behave the same, but this may change in the future.
-
-commit 11858d31aa020df3e7e7dedf49f9870ce12f31cc
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed May 27 03:32:46 2015 -0400
-
- rename internal locale file handling locale maps
-
- since the __setlocalecat function was removed, the filename
- __setlocalecat.c no longer made sense.
-
-commit 61a3364d246e72b903da8b76c2e27a225a51351e
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed May 27 03:22:52 2015 -0400
-
- overhaul locale internals to treat categories roughly uniformly
-
- previously, LC_MESSAGES was treated specially as the only category
- which could be set to a locale name without a definition file, in
- order to facilitate gettext message translations when no libc locale
- was available. LC_NUMERIC was completely un-settable, and LC_CTYPE
- stored a flag intended to be used for a possible future byte-based C
- locale, instead of storing a __locale_map pointer like the other
- categories use.
-
- this patch changes all categories to be represented by pointers to
- __locale_map structures, and allows locale names without definition
- files to be treated as valid locales with trivial definition when used
- in any category. outwardly visible functional changes should be minor,
- limited mainly to the strings read back from setlocale and the way
- gettext handles translations in categories other than LC_MESSAGES.
-
- various internal refactoring has also been performed, and improvements
- in const correctness have been made.
-
-commit 63c188ec42e76ff768e81f6b65b11c68fc43351e
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed May 27 00:22:43 2015 -0400
-
- replace atomics with locks in locale-setting code
-
- this is part of a general program of removing direct use of atomics
- where they are not necessary to meet correctness or performance needs,
- but in this case it's also an optimization. only the global locale
- needs synchronization; allocated locales referenced with locale_t
- handles are immutable during their lifetimes, and using atomics to
- initialize them increases their cost of setup.
-
-commit dc031ee0b1ba11baa00cd7f0769e461a5f396c71
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Tue May 26 03:37:41 2015 -0400
-
- add rcrt1 start file for fully static-linked PIE
-
- static-linked PIE files need startup code to relocate themselves, much
- like the dynamic linker does. rcrt1.c reuses the code in dlstart.c,
- stage 1 of the dynamic linker, which in turn reuses crt_arch.h, to
- achieve static PIE with no new code. only relative relocations are
- supported.
-
- existing toolchains that don't yet support static PIE directly can be
- repurposed by passing "-shared -Wl,-Bstatic -Wl,-Bsymbolic" instead of
- "-static -pie" and substituting rcrt1.o in place of crt1.o.
-
- all libraries being linked must be built as PIC/PIE; TEXTRELs are not
- supported at this time.
-
-commit ed0c8249825161036356a3616e8c5247c15d0927
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Tue May 26 02:31:04 2015 -0400
-
- fix incorrect application of visibility to Scrt1.o
-
- commit de2b67f8d41e08caa56bf6540277f6561edb647f attempted to avoid
- having vis.h affect crt files, but the Makefile variable used,
- CRT_LIBS, refers to the final output copies in the lib directory, not
- the copies in the crt build directory, and thus the -DCRT was not
- applied.
-
- while unlikely to be noticed, this regression probably broke
- production of PIE executables whose main functions are not in the
- executable but rather a shared library.
-
-commit 9bbddf730f7837cf87f4c789fbb41a312e295d6c
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 23:33:59 2015 -0400
-
- reprocess all libc/ldso symbolic relocations in dynamic linking stage 3
-
- commit f3ddd173806fd5c60b3f034528ca24542aecc5b9 introduced early
- relocations and subsequent reprocessing as part of the dynamic linker
- bootstrap overhaul, to allow use of arbitrary libc functions before
- the main application and libraries are loaded, but only reprocessed
- GOT/PLT relocation types.
-
- commit c093e2e8201524db0d638920e76bcb6b1d925f3a added reprocessing of
- non-GOT/PLT relocations to fix an actual regression that was observed
- on powerpc, but only for RELA format tables with out-of-line addends.
- REL table (inline addends at the relocation address) reprocessing is
- trickier because the first relocation pass clobbers the addends.
-
- this patch extends symbolic relocation reprocessing for libc/ldso to
- support all relocation types, whether REL or RELA format tables are
- used. it is believed not to alter behavior on any existing archs for
- the current dynamic linker and libc code. the motivations for this
- change are consistency and future-proofing. it ensures that behavior
- does not differ depending on whether REL or RELA tables are used,
- which could lead to undetected arch-specific bugs. it also ensures
- that, if in the future code depending on additional relocation types
- is added to libc.so, either at the source level or as part of the
- compiler runtime that gets pulled in (for example, soft-float with TLS
- for fenv), the new code will work properly.
-
- the implementation concept is simple: stage 2 of the dynamic linker
- counts the number of symbolic relocations in the libc/ldso REL table
- and allocates a VLA to save their addends into; stage 3 then uses the
- saved addends in place of the inline ones which were clobbered. for
- stack safety, a hard limit (currently 4k) is imposed on the number of
- such addends; this should be a couple orders of magnitude larger than
- the actual need. this number is not a runtime variable that could
- break fail-safety; it is constant for a given libc.so build.
-
-commit 768b82c6de24e480267c4c251c440edfc71800e3
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 19:15:17 2015 -0400
-
- move call to dynamic linker stage-3 into stage-2 function
-
- this move eliminates a duplicate "by-hand" symbol lookup loop from the
- stage-1 code and replaces it with a call to find_sym, which can be
- used once we're in stage 2. it reduces the size of the stage 1 code,
- which is helpful because stage 1 will become the crt start file for
- static-PIE executables, and it will allow stage 3 to access stage 2's
- automatic storage, which will be important in an upcoming commit.
-
-commit 967bcbf67c3ffac587de4d79abc1e5e072d83e3e
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 16:02:49 2015 -0400
-
- mark mips crt code as code
-
- otherwise disassemblers treat it as data.
-
-commit 7b75c4877ddf22f219f944c61d939df1dee4f6d3
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 15:56:36 2015 -0400
-
- mark mips cancellable syscall code as code
-
- otherwise disassemblers treat it as data.
-
-commit 0e0e49421f08cfd670975ecd3604f7f9015e1833
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 00:32:37 2015 -0400
-
- simplify/shrink relocation processing in dynamic linker stage 1
-
- the outer-loop approach made sense when we were also processing
- DT_JMPREL, which might be in REL or RELA form, to avoid major code
- duplication. commit 09db855b35709aa627d7055c57a98e1e471920ab removed
- processing of DT_JMPREL, and in the remaining two tables, the format
- (REL or RELA) is known by the name of the table. simply writing two
- versions of the loop results in smaller and simpler code.
-
-commit 09db855b35709aa627d7055c57a98e1e471920ab
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 25 00:25:56 2015 -0400
-
- remove processing of DT_JMPREL from dynamic linker stage 1 bootstrap
-
- the DT_JMPREL relocation table necessarily consists entirely of
- JMP_SLOT (REL_PLT in internal nomenclature) relocations, which are
- symbolic; they cannot be resolved in stage 1, so there is no point in
- processing them.
-
-commit 9f26ebded188ed78c3571a4ca1477dd6351bc647
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Sun May 24 23:03:47 2015 -0400
-
- fix stack alignment code in mips crt_arch.h
-
- the instruction used to align the stack, "and $sp, $sp, -8", does not
- actually exist; it's expanded to 2 instructions using the 'at'
- (assembler temporary) register, and thus cannot be used in a branch
- delay slot. since alignment mod 16 commutes with subtracting 8, simply
- swapping these two operations fixes the problem.
-
- crt1.o was not affected because it's still being generated from a
- dedicated asm source file. dlstart.lo was not affected because the
- stack pointer it receives is already aligned by the kernel. but
- Scrt1.o was affected in cases where the dynamic linker gave it a
- misaligned stack pointer.
-
-commit 63caf1d207d143fe405bbe0cda9aac8deca1171a
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Fri May 22 01:50:05 2015 -0400
-
- add .text section directive to all crt_arch.h files missing it
-
- i386 and x86_64 versions already had the .text directive; other archs
- did not. normally, top-level (file scope) __asm__ starts in the .text
- section anyway, but problems were reported with some versions of
- clang, and it seems preferable to set it explicitly anyway, at least
- for the sake of consistency between archs.
-
-commit 3b0e83264d156f9e496ab32badd89e4447b807aa
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 21 17:06:28 2015 -0400
-
- remove outdated and misleading comment in iconv.c
-
- the comment claimed that EUC/GBK/Big5 are not implemented, which has
- been incorrect since commit 19b4a0a20efc6b9df98b6a43536ecdd628ba4643.
-
-commit 39b8ce66f2ed9c17427ec3a48be9bda29b93b9d7
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 21 17:01:23 2015 -0400
-
- in iconv_open, accept "CHAR" and "" as aliases for "UTF-8"
-
- while not a requirement, it's common convention in other iconv
- implementations to accept "CHAR" as an alias for nl_langinfo(CODESET),
- meaning the encoding used for char[] strings in the current locale,
- and also "" as an alternate form. supporting this is not costly and
- improves compatibility.
-
-commit c648cefb27984db60474ec1747cbfde83c2856d0
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Wed May 20 00:17:35 2015 -0400
-
- fix inconsistency in a_and and a_or argument types on x86[_64]
-
- conceptually, and on other archs, these functions take a pointer to
- int, but in the i386, x86_64, and x32 versions of atomic.h, they took
- a pointer to void instead.
-
-commit 390f93ef69153bf2087fcf3baa1776ad9a6765ab
-Author: Bobby Bingham <koorogi@koorogi.info>
-Date: Sun May 17 13:46:38 2015 -0500
-
- inline llsc atomics when building for sh4a
-
- If we're building for sh4a, the compiler is already free to use
- instructions only available on sh4a, so we can do the same and inline the
- llsc atomics. If we're building for an older processor, we still do the
- same runtime atomics selection as before.
-
-commit c093e2e8201524db0d638920e76bcb6b1d925f3a
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 18 16:51:54 2015 -0400
-
- reprocess libc/ldso RELA relocations in stage 3 of dynamic linking
-
- this fixes a regression on powerpc that was introduced in commit
- f3ddd173806fd5c60b3f034528ca24542aecc5b9. global data accesses on
- powerpc seem to be using a translation-unit-local GOT filled via
- R_PPC_ADDR32 relocations rather than R_PPC_GLOB_DAT. being a non-GOT
- relocation type, these were not reprocessed after adding the main
- application and its libraries to the chain, causing libc code not to
- see copy relocations in the main program, and therefore to use the
- pre-copy-relocation addresses for global data objects (like environ).
-
- the motivation for the dynamic linker only reprocessing GOT/PLT
- relocation types in stage 3 is that these types always have a zero
- addend, making them safe to process again even if the storage for the
- addend has been clobbered. other relocation types which can be used
- for address constants in initialized data objects may have non-zero
- addends which will be clobbered during the first pass of relocation
- processing if they're stored inline (REL form) rather than out-of-line
- (RELA form).
-
- powerpc generally uses only RELA, so this patch is sufficient to fix
- the regression in practice, but is not fully general, and would not
- suffice if an alternate toolchain generated REL for powerpc.
-
-commit 43e9f652bf4b2195b04fc14c93db591b30a7b790
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Mon May 18 12:11:25 2015 -0400
-
- fix null pointer dereference in dcngettext under specific conditions
-
- if setlocale has not been called, the current locale's messages_name
- may be a null pointer. the code path where it's assumed to be non-null
- was only reachable if bindtextdomain had already been called, which is
- normally not done in programs which do not call setlocale, so the
- omitted check went unnoticed.
-
- patch from Void Linux, with description rewritten.
-
-commit 68630b55c0c7219fe9df70dc28ffbf9efc8021d8
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Sat May 16 01:53:54 2015 -0400
-
- eliminate costly tricks to avoid TLS access for current locale state
-
- the code being removed used atomics to track whether any threads might
- be using a locale other than the current global locale, and whether
- any threads might have abstract 8-bit (non-UTF-8) LC_CTYPE active, a
- feature which was never committed (still pending). the motivations
- were to support early execution prior to setup of the thread pointer,
- to partially support systems (ancient kernels) where thread pointer
- setup is not possible, and to avoid high performance cost on archs
- where accessing the thread pointer may be very slow.
-
- since commit 19a1fe670acb3ab9ead0fe31859ca7d4fe40dd54, the thread
- pointer is always available, so these hacks are no longer needed.
- removing them greatly simplifies the affected code.
-
-commit 707d7c30f3379441de9b320536ddfd354f4c2143
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Sat May 16 01:15:40 2015 -0400
-
- in i386 __set_thread_area, don't assume %gs register is initially zero
-
- commit f630df09b1fd954eda16e2f779da0b5ecc9d80d3 added logic to handle
- the case where __set_thread_area is called more than once by reusing
- the GDT slot already in the %gs register, and only setting up a new
- GDT slot when %gs is zero. this created a hidden assumption that %gs
- is zero when a new process image starts, which is true in practice on
- Linux, but does not seem to be documented ABI, and fails to hold under
- qemu app-level emulation.
-
- while it would in theory be possible to zero %gs in the entry point
- code, this code is shared between static and dynamic binaries, and
- dynamic binaries must not clobber the value of %gs already setup by
- the dynamic linker.
-
- the alternative solution implemented in this commit simply uses global
- data to store the GDT index that's selected. __set_thread_area should
- only be called in the initial thread anyway (subsequent threads get
- their thread pointer setup by __clone), but even if it were called by
- another thread, it would simply read and write back the same GDT index
- that was already assigned to the initial thread, and thus (in the x86
- memory model) there is no data race.
-
-commit c0f10cf06725bd0de37f3ced7954a653bf9f1049
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 14 18:51:27 2015 -0400
-
- make arm reloc.h CRTJMP macro compatible with thumb
-
- compilers targeting armv7 may be configured to produce thumb2 code
- instead of arm code by default, and in the future we may wish to
- support targets where only the thumb instruction set is available.
-
- the instructions this patch omits in thumb mode are needed only for
- non-thumb versions of armv4 or earlier, which are not supported by any
- current compilers/toolchains and thus rather pointless to have. at
- some point these compatibility return sequences may be removed from
- all asm source files, and in that case it would make sense to remove
- them here too and remove the ifdef.
-
-commit 83340c7a580e91b22f58321b7cf6d976af61084c
-Author: Rich Felker <dalias@aerifal.cx>
-Date: Thu May 14 18:26:16 2015 -0400
-
- make arm crt_arch.h compatible with thumb code generation
-
- compilers targeting armv7 may be configured to produce thumb2 code
- instead of arm code by default, and in the future we may wish to
- support targets where only the thumb instruction set is available.
-
- the changes made here avoid operating directly on the sp register,
- which is not possible in thumb code, and address an issue with the way
- the address of _DYNAMIC is computed.
-
- previously, the relative address of _DYNAMIC was stored with an
- additional offset of -8 versus the pc-relative add instruction, since
- on arm the pc register evaluates to ".+8". in thumb code, it instead
- evaluates to ".+4". both are two (normal-size) instructions beyond "."
- in the current execution mode, so the numbered label 2 used in the
- relative address expression is simply moved two instructions ahead to
- be compatible with both instruction sets.
-
---- a/Makefile
-+++ b/Makefile
-@@ -44,7 +44,7 @@ ALL_INCLUDES = $(sort $(wildcard include
-
- EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
- EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
--CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
-+CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/rcrt1.o lib/crti.o lib/crtn.o
- STATIC_LIBS = lib/libc.a
- SHARED_LIBS = lib/libc.so
- TOOL_LIBS = lib/musl-gcc.specs
-@@ -85,11 +85,13 @@ src/internal/version.h: $(wildcard VERSI
-
- src/internal/version.lo: src/internal/version.h
-
--src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h
-+crt/rcrt1.o src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h
-
--crt/crt1.o crt/Scrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)
-+crt/crt1.o crt/Scrt1.o crt/rcrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)
-
--crt/Scrt1.o: CFLAGS += -fPIC
-+crt/rcrt1.o: src/ldso/dlstart.c
-+
-+crt/Scrt1.o crt/rcrt1.o: CFLAGS += -fPIC
-
- OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
- $(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
-@@ -104,7 +106,7 @@ NOSSP_SRCS = $(wildcard crt/*.c) \
- src/ldso/dlstart.c src/ldso/dynlink.c
- $(NOSSP_SRCS:%.c=%.o) $(NOSSP_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_NOSSP)
-
--$(CRT_LIBS): CFLAGS += -DCRT
-+$(CRT_LIBS:lib/%=crt/%): CFLAGS += -DCRT
-
- # This incantation ensures that changes to any subarch asm files will
- # force the corresponding object file to be rebuilt, even if the implicit
---- a/arch/aarch64/crt_arch.h
-+++ b/arch/aarch64/crt_arch.h
-@@ -1,4 +1,5 @@
- __asm__(
-+".text \n"
- ".global " START "\n"
- ".type " START ",%function\n"
- START ":\n"
---- a/arch/arm/crt_arch.h
-+++ b/arch/arm/crt_arch.h
-@@ -1,15 +1,18 @@
- __asm__(
-+".text \n"
- ".global " START " \n"
- ".type " START ",%function \n"
- START ": \n"
- " mov fp, #0 \n"
- " mov lr, #0 \n"
--" mov a1, sp \n"
- " ldr a2, 1f \n"
--"2: add a2, pc, a2 \n"
--" and sp, sp, #-16 \n"
-+" add a2, pc, a2 \n"
-+" mov a1, sp \n"
-+"2: and ip, a1, #-16 \n"
-+" mov sp, ip \n"
- " bl " START "_c \n"
- ".weak _DYNAMIC \n"
- ".hidden _DYNAMIC \n"
--"1: .word _DYNAMIC-2b-8 \n"
-+".align 2 \n"
-+"1: .word _DYNAMIC-2b \n"
- );
---- a/arch/arm/reloc.h
-+++ b/arch/arm/reloc.h
-@@ -28,5 +28,10 @@
- #define REL_TPOFF R_ARM_TLS_TPOFF32
- //#define REL_TLSDESC R_ARM_TLS_DESC
-
-+#ifdef __thumb__
-+#define CRTJMP(pc,sp) __asm__ __volatile__( \
-+ "mov sp,%1 ; bx %0" : : "r"(pc), "r"(sp) : "memory" )
-+#else
- #define CRTJMP(pc,sp) __asm__ __volatile__( \
- "mov sp,%1 ; tst %0,#1 ; moveq pc,%0 ; bx %0" : : "r"(pc), "r"(sp) : "memory" )
-+#endif
---- a/arch/i386/atomic.h
-+++ b/arch/i386/atomic.h
-@@ -50,16 +50,16 @@ static inline int a_cas(volatile int *p,
- return t;
- }
-
--static inline void a_or(volatile void *p, int v)
-+static inline void a_or(volatile int *p, int v)
- {
- __asm__( "lock ; orl %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
--static inline void a_and(volatile void *p, int v)
-+static inline void a_and(volatile int *p, int v)
- {
- __asm__( "lock ; andl %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
- static inline int a_swap(volatile int *x, int v)
---- a/arch/microblaze/crt_arch.h
-+++ b/arch/microblaze/crt_arch.h
-@@ -1,4 +1,5 @@
- __asm__(
-+".text \n"
- ".global " START " \n"
- ".align 2 \n"
- START ": \n"
---- a/arch/mips/crt_arch.h
-+++ b/arch/mips/crt_arch.h
-@@ -1,6 +1,7 @@
- __asm__(
- ".set push\n"
- ".set noreorder\n"
-+".text \n"
- ".global _" START "\n"
- ".global " START "\n"
- ".type _" START ", @function\n"
-@@ -21,8 +22,8 @@ __asm__(
- " addu $5, $5, $gp \n"
- " lw $25, 4($ra) \n"
- " addu $25, $25, $gp \n"
--" subu $sp, $sp, 16 \n"
-+" and $sp, $sp, -8 \n"
- " jalr $25 \n"
--" and $sp, $sp, -8 \n"
-+" subu $sp, $sp, 16 \n"
- ".set pop \n"
- );
---- a/arch/or1k/crt_arch.h
-+++ b/arch/or1k/crt_arch.h
-@@ -1,4 +1,5 @@
- __asm__(
-+".text \n"
- ".global " START " \n"
- ".align 4 \n"
- START ": \n"
---- a/arch/powerpc/crt_arch.h
-+++ b/arch/powerpc/crt_arch.h
-@@ -1,4 +1,5 @@
- __asm__(
-+".text \n"
- ".global " START " \n"
- ".type " START ", %function \n"
- START ": \n"
---- a/arch/sh/atomic.h
-+++ b/arch/sh/atomic.h
-@@ -22,6 +22,88 @@ static inline int a_ctz_64(uint64_t x)
- return a_ctz_l(y);
- }
-
-+#define LLSC_CLOBBERS "r0", "t", "memory"
-+#define LLSC_START(mem) "synco\n" \
-+ "0: movli.l @" mem ", r0\n"
-+#define LLSC_END(mem) \
-+ "1: movco.l r0, @" mem "\n" \
-+ " bf 0b\n" \
-+ " synco\n"
-+
-+static inline int __sh_cas_llsc(volatile int *p, int t, int s)
-+{
-+ int old;
-+ __asm__ __volatile__(
-+ LLSC_START("%1")
-+ " mov r0, %0\n"
-+ " cmp/eq %0, %2\n"
-+ " bf 1f\n"
-+ " mov %3, r0\n"
-+ LLSC_END("%1")
-+ : "=&r"(old) : "r"(p), "r"(t), "r"(s) : LLSC_CLOBBERS);
-+ return old;
-+}
-+
-+static inline int __sh_swap_llsc(volatile int *x, int v)
-+{
-+ int old;
-+ __asm__ __volatile__(
-+ LLSC_START("%1")
-+ " mov r0, %0\n"
-+ " mov %2, r0\n"
-+ LLSC_END("%1")
-+ : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
-+ return old;
-+}
-+
-+static inline int __sh_fetch_add_llsc(volatile int *x, int v)
-+{
-+ int old;
-+ __asm__ __volatile__(
-+ LLSC_START("%1")
-+ " mov r0, %0\n"
-+ " add %2, r0\n"
-+ LLSC_END("%1")
-+ : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
-+ return old;
-+}
-+
-+static inline void __sh_store_llsc(volatile int *p, int x)
-+{
-+ __asm__ __volatile__(
-+ " synco\n"
-+ " mov.l %1, @%0\n"
-+ " synco\n"
-+ : : "r"(p), "r"(x) : "memory");
-+}
-+
-+static inline void __sh_and_llsc(volatile int *x, int v)
-+{
-+ __asm__ __volatile__(
-+ LLSC_START("%0")
-+ " and %1, r0\n"
-+ LLSC_END("%0")
-+ : : "r"(x), "r"(v) : LLSC_CLOBBERS);
-+}
-+
-+static inline void __sh_or_llsc(volatile int *x, int v)
-+{
-+ __asm__ __volatile__(
-+ LLSC_START("%0")
-+ " or %1, r0\n"
-+ LLSC_END("%0")
-+ : : "r"(x), "r"(v) : LLSC_CLOBBERS);
-+}
-+
-+#ifdef __SH4A__
-+#define a_cas(p,t,s) __sh_cas_llsc(p,t,s)
-+#define a_swap(x,v) __sh_swap_llsc(x,v)
-+#define a_fetch_add(x,v) __sh_fetch_add_llsc(x, v)
-+#define a_store(x,v) __sh_store_llsc(x, v)
-+#define a_and(x,v) __sh_and_llsc(x, v)
-+#define a_or(x,v) __sh_or_llsc(x, v)
-+#else
-+
- int __sh_cas(volatile int *, int, int);
- int __sh_swap(volatile int *, int);
- int __sh_fetch_add(volatile int *, int);
-@@ -35,6 +117,7 @@ void __sh_or(volatile int *, int);
- #define a_store(x,v) __sh_store(x, v)
- #define a_and(x,v) __sh_and(x, v)
- #define a_or(x,v) __sh_or(x, v)
-+#endif
-
- static inline void *a_cas_p(volatile void *p, void *t, void *s)
- {
---- a/arch/sh/crt_arch.h
-+++ b/arch/sh/crt_arch.h
-@@ -1,4 +1,5 @@
- __asm__(
-+".text \n"
- ".global " START " \n"
- START ": \n"
- " mova 1f, r0 \n"
---- a/arch/sh/src/atomic.c
-+++ b/arch/sh/src/atomic.c
-@@ -1,12 +1,7 @@
--#include "libc.h"
-+#ifndef __SH4A__
-
--#define LLSC_CLOBBERS "r0", "t", "memory"
--#define LLSC_START(mem) "synco\n" \
-- "0: movli.l @" mem ", r0\n"
--#define LLSC_END(mem) \
-- "1: movco.l r0, @" mem "\n" \
-- " bf 0b\n" \
-- " synco\n"
-+#include "atomic.h"
-+#include "libc.h"
-
- /* gusa is a hack in the kernel which lets you create a sequence of instructions
- * which will be restarted if the process is preempted in the middle of the
-@@ -34,114 +29,74 @@
-
- int __sh_cas(volatile int *p, int t, int s)
- {
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_cas_llsc(p, t, s);
-+
- int old;
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- LLSC_START("%1")
-- " mov r0, %0\n"
-- " cmp/eq %0, %2\n"
-- " bf 1f\n"
-- " mov %3, r0\n"
-- LLSC_END("%1")
-- : "=&r"(old) : "r"(p), "r"(t), "r"(s) : LLSC_CLOBBERS);
-- } else {
-- __asm__ __volatile__(
-- GUSA_START_EVEN("%1", "%0")
-- " cmp/eq %0, %2\n"
-- " bf 1f\n"
-- GUSA_END("%1", "%3")
-- : "=&r"(old) : "r"(p), "r"(t), "r"(s) : GUSA_CLOBBERS, "t");
-- }
-+ __asm__ __volatile__(
-+ GUSA_START_EVEN("%1", "%0")
-+ " cmp/eq %0, %2\n"
-+ " bf 1f\n"
-+ GUSA_END("%1", "%3")
-+ : "=&r"(old) : "r"(p), "r"(t), "r"(s) : GUSA_CLOBBERS, "t");
- return old;
- }
-
- int __sh_swap(volatile int *x, int v)
- {
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_swap_llsc(x, v);
-+
- int old;
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- LLSC_START("%1")
-- " mov r0, %0\n"
-- " mov %2, r0\n"
-- LLSC_END("%1")
-- : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
-- } else {
-- __asm__ __volatile__(
-- GUSA_START_EVEN("%1", "%0")
-- GUSA_END("%1", "%2")
-- : "=&r"(old) : "r"(x), "r"(v) : GUSA_CLOBBERS);
-- }
-+ __asm__ __volatile__(
-+ GUSA_START_EVEN("%1", "%0")
-+ GUSA_END("%1", "%2")
-+ : "=&r"(old) : "r"(x), "r"(v) : GUSA_CLOBBERS);
- return old;
- }
-
- int __sh_fetch_add(volatile int *x, int v)
- {
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_fetch_add_llsc(x, v);
-+
- int old, dummy;
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- LLSC_START("%1")
-- " mov r0, %0\n"
-- " add %2, r0\n"
-- LLSC_END("%1")
-- : "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
-- } else {
-- __asm__ __volatile__(
-- GUSA_START_EVEN("%2", "%0")
-- " mov %0, %1\n"
-- " add %3, %1\n"
-- GUSA_END("%2", "%1")
-- : "=&r"(old), "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
-- }
-+ __asm__ __volatile__(
-+ GUSA_START_EVEN("%2", "%0")
-+ " mov %0, %1\n"
-+ " add %3, %1\n"
-+ GUSA_END("%2", "%1")
-+ : "=&r"(old), "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
- return old;
- }
-
- void __sh_store(volatile int *p, int x)
- {
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- " synco\n"
-- " mov.l %1, @%0\n"
-- " synco\n"
-- : : "r"(p), "r"(x) : "memory");
-- } else {
-- __asm__ __volatile__(
-- " mov.l %1, @%0\n"
-- : : "r"(p), "r"(x) : "memory");
-- }
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_store_llsc(p, x);
-+ __asm__ __volatile__(
-+ " mov.l %1, @%0\n"
-+ : : "r"(p), "r"(x) : "memory");
- }
-
- void __sh_and(volatile int *x, int v)
- {
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_and_llsc(x, v);
-+
- int dummy;
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- LLSC_START("%0")
-- " and %1, r0\n"
-- LLSC_END("%0")
-- : : "r"(x), "r"(v) : LLSC_CLOBBERS);
-- } else {
-- __asm__ __volatile__(
-- GUSA_START_ODD("%1", "%0")
-- " and %2, %0\n"
-- GUSA_END("%1", "%0")
-- : "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
-- }
-+ __asm__ __volatile__(
-+ GUSA_START_ODD("%1", "%0")
-+ " and %2, %0\n"
-+ GUSA_END("%1", "%0")
-+ : "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
- }
-
- void __sh_or(volatile int *x, int v)
- {
-+ if (__hwcap & CPU_HAS_LLSC) return __sh_or_llsc(x, v);
-+
- int dummy;
-- if (__hwcap & CPU_HAS_LLSC) {
-- __asm__ __volatile__(
-- LLSC_START("%0")
-- " or %1, r0\n"
-- LLSC_END("%0")
-- : : "r"(x), "r"(v) : LLSC_CLOBBERS);
-- } else {
-- __asm__ __volatile__(
-- GUSA_START_ODD("%1", "%0")
-- " or %2, %0\n"
-- GUSA_END("%1", "%0")
-- : "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
-- }
-+ __asm__ __volatile__(
-+ GUSA_START_ODD("%1", "%0")
-+ " or %2, %0\n"
-+ GUSA_END("%1", "%0")
-+ : "=&r"(dummy) : "r"(x), "r"(v) : GUSA_CLOBBERS);
- }
-+
-+#endif
---- a/arch/x32/atomic.h
-+++ b/arch/x32/atomic.h
-@@ -47,16 +47,16 @@ static inline int a_cas(volatile int *p,
- return t;
- }
-
--static inline void a_or(volatile void *p, int v)
-+static inline void a_or(volatile int *p, int v)
- {
- __asm__( "lock ; or %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
--static inline void a_and(volatile void *p, int v)
-+static inline void a_and(volatile int *p, int v)
- {
- __asm__( "lock ; and %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
- static inline int a_swap(volatile int *x, int v)
---- a/arch/x86_64/atomic.h
-+++ b/arch/x86_64/atomic.h
-@@ -47,16 +47,16 @@ static inline int a_cas(volatile int *p,
- return t;
- }
-
--static inline void a_or(volatile void *p, int v)
-+static inline void a_or(volatile int *p, int v)
- {
- __asm__( "lock ; or %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
--static inline void a_and(volatile void *p, int v)
-+static inline void a_and(volatile int *p, int v)
- {
- __asm__( "lock ; and %1, %0"
-- : "=m"(*(int *)p) : "r"(v) : "memory" );
-+ : "=m"(*p) : "r"(v) : "memory" );
- }
-
- static inline int a_swap(volatile int *x, int v)
---- a/configure
-+++ b/configure
-@@ -80,7 +80,7 @@ fi
- tryflag () {
- printf "checking whether compiler accepts %s... " "$2"
- echo "typedef int x;" > "$tmpc"
--if $CC $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
-+if $CC $CFLAGS_TRY $2 -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
- printf "yes\n"
- eval "$1=\"\${$1} \$2\""
- eval "$1=\${$1# }"
-@@ -94,7 +94,7 @@ fi
- tryldflag () {
- printf "checking whether linker accepts %s... " "$2"
- echo "typedef int x;" > "$tmpc"
--if $CC -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
-+if $CC $LDFLAGS_TRY -nostdlib -shared "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
- printf "yes\n"
- eval "$1=\"\${$1} \$2\""
- eval "$1=\${$1# }"
-@@ -113,7 +113,9 @@ CFLAGS_C99FSE=
- CFLAGS_AUTO=
- CFLAGS_MEMOPS=
- CFLAGS_NOSSP=
-+CFLAGS_TRY=
- LDFLAGS_AUTO=
-+LDFLAGS_TRY=
- OPTIMIZE_GLOBS=
- prefix=/usr/local/musl
- exec_prefix='$(prefix)'
-@@ -205,6 +207,14 @@ exit 1
- fi
-
- #
-+# Figure out options to force errors on unknown flags.
-+#
-+tryflag CFLAGS_TRY -Werror=unknown-warning-option
-+tryflag CFLAGS_TRY -Werror=unused-command-line-argument
-+tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
-+tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
-+
-+#
- # Need to know if the compiler is gcc to decide whether to build the
- # musl-gcc wrapper, and for critical bug detection in some gcc versions.
- #
---- a/crt/mips/crt1.s
-+++ b/crt/mips/crt1.s
-@@ -4,6 +4,8 @@
- .weak _fini
- .global __start
- .global _start
-+.type __start,@function
-+.type _start,@function
- __start:
- _start:
- subu $fp, $fp, $fp # Zero the frame pointer.
---- a/crt/mips/crti.s
-+++ b/crt/mips/crti.s
-@@ -2,6 +2,7 @@
-
- .section .init
- .global _init
-+.type _init,@function
- .align 2
- _init:
- subu $sp,$sp,32
-@@ -10,6 +11,7 @@ _init:
-
- .section .fini
- .global _fini
-+.type _fini,@function
- .align 2
- _fini:
- subu $sp,$sp,32
---- /dev/null
-+++ b/crt/rcrt1.c
-@@ -0,0 +1,15 @@
-+#define SHARED
-+#define START "_start"
-+#define _dlstart_c _start_c
-+#include "../src/ldso/dlstart.c"
-+
-+int main();
-+void _init() __attribute__((weak));
-+void _fini() __attribute__((weak));
-+_Noreturn int __libc_start_main(int (*)(), int, char **,
-+ void (*)(), void(*)(), void(*)());
-+
-+_Noreturn void __dls2(unsigned char *base, size_t *sp)
-+{
-+ __libc_start_main(main, *sp, (void *)(sp+1), _init, _fini, 0);
-+}
---- a/include/sys/resource.h
-+++ b/include/sys/resource.h
-@@ -96,6 +96,9 @@ int prlimit(pid_t, int, const struct rli
- #define RLIM_NLIMITS RLIMIT_NLIMITS
-
- #if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
-+#define RLIM64_INFINITY RLIM_INFINITY
-+#define RLIM64_SAVED_CUR RLIM_SAVED_CUR
-+#define RLIM64_SAVED_MAX RLIM_SAVED_MAX
- #define getrlimit64 getrlimit
- #define setrlimit64 setrlimit
- #define rlimit64 rlimit
---- a/src/internal/dynlink.h
-+++ b/src/internal/dynlink.h
-@@ -51,7 +51,7 @@ enum {
- #define AUX_CNT 32
- #define DYN_CNT 32
-
--typedef void (*stage2_func)(unsigned char *);
-+typedef void (*stage2_func)(unsigned char *, size_t *);
- typedef _Noreturn void (*stage3_func)(size_t *);
-
- #endif
---- a/src/internal/libc.h
-+++ b/src/internal/libc.h
-@@ -8,9 +8,7 @@
- struct __locale_map;
-
- struct __locale_struct {
-- volatile int ctype_utf8;
-- char *messages_name;
-- struct __locale_map *volatile cat[4];
-+ const struct __locale_map *volatile cat[6];
- };
-
- struct __libc {
-@@ -23,8 +21,6 @@ struct __libc {
- volatile int ofl_lock[2];
- size_t tls_size;
- size_t page_size;
-- volatile int uselocale_cnt;
-- volatile int bytelocale_cnt_minus_1;
- struct __locale_struct global_locale;
- };
-
---- a/src/internal/locale_impl.h
-+++ b/src/internal/locale_impl.h
-@@ -9,22 +9,20 @@ struct __locale_map {
- const void *map;
- size_t map_size;
- char name[LOCALE_NAME_MAX+1];
-- struct __locale_map *next;
-+ const struct __locale_map *next;
- };
-
--int __setlocalecat(locale_t, int, const char *);
-+const struct __locale_map *__get_locale(int, const char *);
- const char *__mo_lookup(const void *, size_t, const char *);
- const char *__lctrans(const char *, const struct __locale_map *);
- const char *__lctrans_cur(const char *);
-
--#define LCTRANS(msg, lc, loc) __lctrans(msg, (loc)->cat[(lc)-2])
-+#define LCTRANS(msg, lc, loc) __lctrans(msg, (loc)->cat[(lc)])
- #define LCTRANS_CUR(msg) __lctrans_cur(msg)
-
--#define CURRENT_LOCALE \
-- (libc.uselocale_cnt ? __pthread_self()->locale : &libc.global_locale)
-+#define CURRENT_LOCALE (__pthread_self()->locale)
-
--#define CURRENT_UTF8 \
-- (libc.bytelocale_cnt_minus_1<0 || __pthread_self()->locale->ctype_utf8)
-+#define CURRENT_UTF8 (!!__pthread_self()->locale->cat[LC_CTYPE])
-
- #undef MB_CUR_MAX
- #define MB_CUR_MAX (CURRENT_UTF8 ? 4 : 1)
---- a/src/ldso/dlstart.c
-+++ b/src/ldso/dlstart.c
-@@ -56,31 +56,22 @@ void _dlstart_c(size_t *sp, size_t *dynv
- for (i=0; i<local_cnt; i++) got[i] += (size_t)base;
- }
-
-- /* The use of the reloc_info structure and nested loops is a trick
-- * to work around the fact that we can't necessarily make function
-- * calls yet. Each struct in the array serves like the arguments
-- * to a function call. */
-- struct {
-- void *rel;
-- size_t size;
-- size_t stride;
-- } reloc_info[] = {
-- { base+dyn[DT_JMPREL], dyn[DT_PLTRELSZ], 2+(dyn[DT_PLTREL]==DT_RELA) },
-- { base+dyn[DT_REL], dyn[DT_RELSZ], 2 },
-- { base+dyn[DT_RELA], dyn[DT_RELASZ], 3 },
-- { 0, 0, 0 }
-- };
--
-- for (i=0; reloc_info[i].stride; i++) {
-- size_t *rel = reloc_info[i].rel;
-- size_t rel_size = reloc_info[i].size;
-- size_t stride = reloc_info[i].stride;
-- for (; rel_size; rel+=stride, rel_size-=stride*sizeof(size_t)) {
-- if (!IS_RELATIVE(rel[1])) continue;
-- size_t *rel_addr = (void *)(base + rel[0]);
-- size_t addend = stride==3 ? rel[2] : *rel_addr;
-- *rel_addr = (size_t)base + addend;
-- }
-+ size_t *rel, rel_size;
-+
-+ rel = (void *)(base+dyn[DT_REL]);
-+ rel_size = dyn[DT_RELSZ];
-+ for (; rel_size; rel+=2, rel_size-=2*sizeof(size_t)) {
-+ if (!IS_RELATIVE(rel[1])) continue;
-+ size_t *rel_addr = (void *)(base + rel[0]);
-+ *rel_addr += (size_t)base;
-+ }
-+
-+ rel = (void *)(base+dyn[DT_RELA]);
-+ rel_size = dyn[DT_RELASZ];
-+ for (; rel_size; rel+=3, rel_size-=3*sizeof(size_t)) {
-+ if (!IS_RELATIVE(rel[1])) continue;
-+ size_t *rel_addr = (void *)(base + rel[0]);
-+ *rel_addr = (size_t)base + rel[2];
- }
-
- const char *strings = (void *)(base + dyn[DT_STRTAB]);
-@@ -93,16 +84,7 @@ void _dlstart_c(size_t *sp, size_t *dynv
- && s[3]=='l' && s[4]=='s' && s[5]=='2' && !s[6])
- break;
- }
-- ((stage2_func)(base + syms[i].st_value))(base);
--
-- /* Call dynamic linker stage-3, __dls3 */
-- for (i=0; ;i++) {
-- const char *s = strings + syms[i].st_name;
-- if (s[0]=='_' && s[1]=='_' && s[2]=='d'
-- && s[3]=='l' && s[4]=='s' && s[5]=='3' && !s[6])
-- break;
-- }
-- ((stage3_func)(base + syms[i].st_value))(sp);
-+ ((stage2_func)(base + syms[i].st_value))(base, sp);
- }
-
- #endif
---- a/src/ldso/dynlink.c
-+++ b/src/ldso/dynlink.c
-@@ -74,7 +74,6 @@ struct dso {
- volatile int new_dtv_idx, new_tls_idx;
- struct td_index *td_index;
- struct dso *fini_next;
-- int rel_early_relative, rel_update_got;
- char *shortname;
- char buf[];
- };
-@@ -96,6 +95,9 @@ static struct builtin_tls {
- } builtin_tls[1];
- #define MIN_TLS_ALIGN offsetof(struct builtin_tls, pt)
-
-+#define ADDEND_LIMIT 4096
-+static size_t *saved_addends, *apply_addends_to;
-+
- static struct dso ldso;
- static struct dso *head, *tail, *fini_head;
- static char *env_path, *sys_path;
-@@ -256,10 +258,19 @@ static void do_relocs(struct dso *dso, s
- size_t sym_val;
- size_t tls_val;
- size_t addend;
-+ int skip_relative = 0, reuse_addends = 0, save_slot = 0;
-+
-+ if (dso == &ldso) {
-+ /* Only ldso's REL table needs addend saving/reuse. */
-+ if (rel == apply_addends_to)
-+ reuse_addends = 1;
-+ skip_relative = 1;
-+ }
-
- for (; rel_size; rel+=stride, rel_size-=stride*sizeof(size_t)) {
-- if (dso->rel_early_relative && IS_RELATIVE(rel[1])) continue;
-+ if (skip_relative && IS_RELATIVE(rel[1])) continue;
- type = R_TYPE(rel[1]);
-+ if (type == REL_NONE) continue;
- sym_index = R_SYM(rel[1]);
- reloc_addr = (void *)(base + rel[0]);
- if (sym_index) {
-@@ -280,12 +291,20 @@ static void do_relocs(struct dso *dso, s
- def.dso = dso;
- }
-
-- int gotplt = (type == REL_GOT || type == REL_PLT);
-- if (dso->rel_update_got && !gotplt) continue;
--
-- addend = stride>2 ? rel[2]
-- : gotplt || type==REL_COPY ? 0
-- : *reloc_addr;
-+ if (stride > 2) {
-+ addend = rel[2];
-+ } else if (type==REL_GOT || type==REL_PLT|| type==REL_COPY) {
-+ addend = 0;
-+ } else if (reuse_addends) {
-+ /* Save original addend in stage 2 where the dso
-+ * chain consists of just ldso; otherwise read back
-+ * saved addend since the inline one was clobbered. */
-+ if (head==&ldso)
-+ saved_addends[save_slot] = *reloc_addr;
-+ addend = saved_addends[save_slot++];
-+ } else {
-+ addend = *reloc_addr;
-+ }
-
- sym_val = def.sym ? (size_t)def.dso->base+def.sym->st_value : 0;
- tls_val = def.sym ? def.sym->st_value : 0;
-@@ -879,7 +898,7 @@ static void do_mips_relocs(struct dso *p
- size_t i, j, rel[2];
- unsigned char *base = p->base;
- i=0; search_vec(p->dynv, &i, DT_MIPS_LOCAL_GOTNO);
-- if (p->rel_early_relative) {
-+ if (p==&ldso) {
- got += i;
- } else {
- while (i--) *got++ += (size_t)base;
-@@ -1116,7 +1135,7 @@ static void update_tls_size()
- * linker itself, but some of the relocations performed may need to be
- * replaced later due to copy relocations in the main program. */
-
--void __dls2(unsigned char *base)
-+void __dls2(unsigned char *base, size_t *sp)
- {
- Ehdr *ehdr = (void *)base;
- ldso.base = base;
-@@ -1125,15 +1144,35 @@ void __dls2(unsigned char *base)
- ldso.phnum = ehdr->e_phnum;
- ldso.phdr = (void *)(base + ehdr->e_phoff);
- ldso.phentsize = ehdr->e_phentsize;
-- ldso.rel_early_relative = 1;
- kernel_mapped_dso(&ldso);
- decode_dyn(&ldso);
-
-+ /* Prepare storage for to save clobbered REL addends so they
-+ * can be reused in stage 3. There should be very few. If
-+ * something goes wrong and there are a huge number, abort
-+ * instead of risking stack overflow. */
-+ size_t dyn[DYN_CNT];
-+ decode_vec(ldso.dynv, dyn, DYN_CNT);
-+ size_t *rel = (void *)(base+dyn[DT_REL]);
-+ size_t rel_size = dyn[DT_RELSZ];
-+ size_t symbolic_rel_cnt = 0;
-+ apply_addends_to = rel;
-+ for (; rel_size; rel+=2, rel_size-=2*sizeof(size_t))
-+ if (!IS_RELATIVE(rel[1])) symbolic_rel_cnt++;
-+ if (symbolic_rel_cnt >= ADDEND_LIMIT) a_crash();
-+ size_t addends[symbolic_rel_cnt+1];
-+ saved_addends = addends;
-+
- head = &ldso;
- reloc_all(&ldso);
-
- ldso.relocated = 0;
-- ldso.rel_update_got = 1;
-+
-+ /* Call dynamic linker stage-3, __dls3, looking it up
-+ * symbolically as a barrier against moving the address
-+ * load across the above relocation processing. */
-+ struct symdef dls3_def = find_sym(&ldso, "__dls3", 0);
-+ ((stage3_func)(ldso.base+dls3_def.sym->st_value))(sp);
- }
-
- /* Stage 3 of the dynamic linker is called with the dynamic linker/libc
---- a/src/locale/__lctrans.c
-+++ b/src/locale/__lctrans.c
-@@ -16,5 +16,5 @@ const char *__lctrans(const char *msg, c
-
- const char *__lctrans_cur(const char *msg)
- {
-- return __lctrans_impl(msg, CURRENT_LOCALE->cat[LC_MESSAGES-2]);
-+ return __lctrans_impl(msg, CURRENT_LOCALE->cat[LC_MESSAGES]);
- }
---- a/src/locale/__setlocalecat.c
-+++ /dev/null
-@@ -1,111 +0,0 @@
--#include <locale.h>
--#include <string.h>
--#include "locale_impl.h"
--#include "libc.h"
--#include "atomic.h"
--
--const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
--{
-- const char *trans = 0;
-- if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
-- return trans ? trans : msg;
--}
--
--const unsigned char *__map_file(const char *, size_t *);
--int __munmap(void *, size_t);
--char *__strchrnul(const char *, int);
--
--static struct __locale_map *findlocale(const char *name, size_t n)
--{
-- static void *volatile loc_head;
-- struct __locale_map *p, *new, *old_head;
-- const char *path = 0, *z;
-- char buf[256];
-- size_t l;
-- const void *map;
-- size_t map_size;
--
-- for (p=loc_head; p; p=p->next)
-- if (!strcmp(name, p->name)) return p;
--
-- if (!libc.secure) path = getenv("MUSL_LOCPATH");
-- /* FIXME: add a default path? */
-- if (!path) return 0;
--
-- for (; *path; path=z+!!*z) {
-- z = __strchrnul(path, ':');
-- l = z - path - !!*z;
-- if (l >= sizeof buf - n - 2) continue;
-- memcpy(buf, path, l);
-- buf[l] = '/';
-- memcpy(buf+l+1, name, n);
-- buf[l+1+n] = 0;
-- map = __map_file(buf, &map_size);
-- if (map) {
-- new = malloc(sizeof *new);
-- if (!new) {
-- __munmap((void *)map, map_size);
-- return 0;
-- }
-- new->map = map;
-- new->map_size = map_size;
-- memcpy(new->name, name, n);
-- new->name[n] = 0;
-- do {
-- old_head = loc_head;
-- new->next = old_head;
-- } while (a_cas_p(&loc_head, old_head, new) != old_head);
-- return new;
-- }
-- }
-- return 0;
--}
--
--static const char envvars[][12] = {
-- "LC_CTYPE",
-- "LC_NUMERIC",
-- "LC_TIME",
-- "LC_COLLATE",
-- "LC_MONETARY",
-- "LC_MESSAGES",
--};
--
--int __setlocalecat(locale_t loc, int cat, const char *val)
--{
-- if (!*val) {
-- (val = getenv("LC_ALL")) && *val ||
-- (val = getenv(envvars[cat])) && *val ||
-- (val = getenv("LANG")) && *val ||
-- (val = "C.UTF-8");
-- }
--
-- size_t n;
-- for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
-- if (val[0]=='.' || val[n]) val = "C.UTF-8";
-- int builtin = (val[0]=='C' && !val[1])
-- || !strcmp(val, "C.UTF-8")
-- || !strcmp(val, "POSIX");
-- struct __locale_map *data, *old;
--
-- switch (cat) {
-- case LC_CTYPE:
-- a_store(&loc->ctype_utf8, !builtin || val[1]=='.');
-- break;
-- case LC_MESSAGES:
-- if (builtin) {
-- loc->messages_name[0] = 0;
-- } else {
-- memcpy(loc->messages_name, val, n);
-- loc->messages_name[n] = 0;
-- }
-- /* fall through */
-- default:
-- data = builtin ? 0 : findlocale(val, n);
-- if (data == loc->cat[cat-2]) break;
-- do old = loc->cat[cat-2];
-- while (a_cas_p(&loc->cat[cat-2], old, data) != old);
-- case LC_NUMERIC:
-- break;
-- }
-- return 0;
--}
---- a/src/locale/dcngettext.c
-+++ b/src/locale/dcngettext.c
-@@ -84,13 +84,15 @@ char *bindtextdomain(const char *domainn
- }
-
- static const char catnames[][12] = {
-+ "LC_CTYPE",
-+ "LC_NUMERIC",
- "LC_TIME",
- "LC_COLLATE",
- "LC_MONETARY",
- "LC_MESSAGES",
- };
-
--static const char catlens[] = { 7, 10, 11, 11 };
-+static const char catlens[] = { 8, 10, 7, 10, 11, 11 };
-
- struct msgcat {
- struct msgcat *next;
-@@ -117,10 +119,12 @@ char *dcngettext(const char *domainname,
- static struct msgcat *volatile cats;
- struct msgcat *p;
- struct __locale_struct *loc = CURRENT_LOCALE;
-- struct __locale_map *lm;
-+ const struct __locale_map *lm;
- const char *dirname, *locname, *catname;
- size_t dirlen, loclen, catlen, domlen;
-
-+ if ((unsigned)category >= LC_ALL) goto notrans;
-+
- if (!domainname) domainname = __gettextdomain();
-
- domlen = strlen(domainname);
-@@ -129,25 +133,15 @@ char *dcngettext(const char *domainname,
- dirname = gettextdir(domainname, &dirlen);
- if (!dirname) goto notrans;
-
-- switch (category) {
-- case LC_MESSAGES:
-- locname = loc->messages_name;
-- if (!*locname) goto notrans;
-- break;
-- case LC_TIME:
-- case LC_MONETARY:
-- case LC_COLLATE:
-- lm = loc->cat[category-2];
-- if (!lm) goto notrans;
-- locname = lm->name;
-- break;
-- default:
-+ lm = loc->cat[category];
-+ if (!lm) {
- notrans:
- return (char *) ((n == 1) ? msgid1 : msgid2);
- }
-+ locname = lm->name;
-
-- catname = catnames[category-2];
-- catlen = catlens[category-2];
-+ catname = catnames[category];
-+ catlen = catlens[category];
- loclen = strlen(locname);
-
- size_t namelen = dirlen+1 + loclen+1 + catlen+1 + domlen+3;
---- a/src/locale/duplocale.c
-+++ b/src/locale/duplocale.c
-@@ -5,17 +5,10 @@
-
- locale_t __duplocale(locale_t old)
- {
-- locale_t new = calloc(1, sizeof *new + LOCALE_NAME_MAX + 1);
-+ locale_t new = malloc(sizeof *new);
- if (!new) return 0;
-- new->messages_name = (void *)(new+1);
--
- if (old == LC_GLOBAL_LOCALE) old = &libc.global_locale;
-- new->ctype_utf8 = old->ctype_utf8;
-- if (old->messages_name)
-- strcpy(new->messages_name, old->messages_name);
--
-- for (size_t i=0; i<sizeof new->cat/sizeof new->cat[0]; i++)
-- new->cat[i] = old->cat[i];
-+ *new = *old;
- return new;
- }
-
---- a/src/locale/freelocale.c
-+++ b/src/locale/freelocale.c
-@@ -2,9 +2,11 @@
- #include "locale_impl.h"
- #include "libc.h"
-
-+int __loc_is_allocated(locale_t);
-+
- void freelocale(locale_t l)
- {
-- free(l);
-+ if (__loc_is_allocated(l)) free(l);
- }
-
- weak_alias(freelocale, __freelocale);
---- a/src/locale/iconv.c
-+++ b/src/locale/iconv.c
-@@ -23,19 +23,13 @@
- #define BIG5 0340
- #define EUC_KR 0350
-
--/* FIXME: these are not implemented yet
-- * EUC: A1-FE A1-FE
-- * GBK: 81-FE 40-7E,80-FE
-- * Big5: A1-FE 40-7E,A1-FE
-- */
--
- /* Definitions of charmaps. Each charmap consists of:
- * 1. Empty-string-terminated list of null-terminated aliases.
- * 2. Special type code or number of elided entries.
- * 3. Character table (size determined by field 2). */
-
- static const unsigned char charmaps[] =
--"utf8\0\0\310"
-+"utf8\0char\0\0\310"
- "wchart\0\0\306"
- "ucs2\0ucs2be\0\0\304"
- "ucs2le\0\0\305"
-@@ -90,6 +84,7 @@ static int fuzzycmp(const unsigned char
- static size_t find_charmap(const void *name)
- {
- const unsigned char *s;
-+ if (!*(char *)name) name=charmaps; /* "utf8" */
- for (s=charmaps; *s; ) {
- if (!fuzzycmp(name, s)) {
- for (; *s; s+=strlen((void *)s)+1);
---- /dev/null
-+++ b/src/locale/locale_map.c
-@@ -0,0 +1,124 @@
-+#include <locale.h>
-+#include <string.h>
-+#include "locale_impl.h"
-+#include "libc.h"
-+#include "atomic.h"
-+
-+const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
-+{
-+ const char *trans = 0;
-+ if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
-+ return trans ? trans : msg;
-+}
-+
-+const unsigned char *__map_file(const char *, size_t *);
-+int __munmap(void *, size_t);
-+char *__strchrnul(const char *, int);
-+
-+static const char envvars[][12] = {
-+ "LC_CTYPE",
-+ "LC_NUMERIC",
-+ "LC_TIME",
-+ "LC_COLLATE",
-+ "LC_MONETARY",
-+ "LC_MESSAGES",
-+};
-+
-+static const uint32_t empty_mo[] = { 0x950412de, 0, -1, -1, -1 };
-+
-+const struct __locale_map __c_dot_utf8 = {
-+ .map = empty_mo,
-+ .map_size = sizeof empty_mo,
-+ .name = "C.UTF-8"
-+};
-+
-+const struct __locale_map *__get_locale(int cat, const char *val)
-+{
-+ static int lock[2];
-+ static void *volatile loc_head;
-+ const struct __locale_map *p;
-+ struct __locale_map *new = 0;
-+ const char *path = 0, *z;
-+ char buf[256];
-+ size_t l, n;
-+
-+ if (!*val) {
-+ (val = getenv("LC_ALL")) && *val ||
-+ (val = getenv(envvars[cat])) && *val ||
-+ (val = getenv("LANG")) && *val ||
-+ (val = "C.UTF-8");
-+ }
-+
-+ /* Limit name length and forbid leading dot or any slashes. */
-+ for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
-+ if (val[0]=='.' || val[n]) val = "C.UTF-8";
-+ int builtin = (val[0]=='C' && !val[1])
-+ || !strcmp(val, "C.UTF-8")
-+ || !strcmp(val, "POSIX");
-+
-+ if (builtin) {
-+ if (cat == LC_CTYPE && val[1]=='.')
-+ return (void *)&__c_dot_utf8;
-+ return 0;
-+ }
-+
-+ for (p=loc_head; p; p=p->next)
-+ if (!strcmp(val, p->name)) return p;
-+
-+ LOCK(lock);
-+
-+ for (p=loc_head; p; p=p->next)
-+ if (!strcmp(val, p->name)) {
-+ UNLOCK(lock);
-+ return p;
-+ }
-+
-+ if (!libc.secure) path = getenv("MUSL_LOCPATH");
-+ /* FIXME: add a default path? */
-+
-+ if (path) for (; *path; path=z+!!*z) {
-+ z = __strchrnul(path, ':');
-+ l = z - path - !!*z;
-+ if (l >= sizeof buf - n - 2) continue;
-+ memcpy(buf, path, l);
-+ buf[l] = '/';
-+ memcpy(buf+l+1, val, n);
-+ buf[l+1+n] = 0;
-+ size_t map_size;
-+ const void *map = __map_file(buf, &map_size);
-+ if (map) {
-+ new = malloc(sizeof *new);
-+ if (!new) {
-+ __munmap((void *)map, map_size);
-+ break;
-+ }
-+ new->map = map;
-+ new->map_size = map_size;
-+ memcpy(new->name, val, n);
-+ new->name[n] = 0;
-+ new->next = loc_head;
-+ loc_head = new;
-+ break;
-+ }
-+ }
-+
-+ /* If no locale definition was found, make a locale map
-+ * object anyway to store the name, which is kept for the
-+ * sake of being able to do message translations at the
-+ * application level. */
-+ if (!new && (new = malloc(sizeof *new))) {
-+ new->map = empty_mo;
-+ new->map_size = sizeof empty_mo;
-+ memcpy(new->name, val, n);
-+ new->name[n] = 0;
-+ new->next = loc_head;
-+ loc_head = new;
-+ }
-+
-+ /* For LC_CTYPE, never return a null pointer unless the
-+ * requested name was "C" or "POSIX". */
-+ if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
-+
-+ UNLOCK(lock);
-+ return new;
-+}
---- a/src/locale/newlocale.c
-+++ b/src/locale/newlocale.c
-@@ -3,22 +3,52 @@
- #include "locale_impl.h"
- #include "libc.h"
-
-+extern const struct __locale_map __c_dot_utf8;
-+
-+static const struct __locale_struct c_locale = { 0 };
-+static const struct __locale_struct c_dot_utf8_locale = {
-+ .cat[LC_CTYPE] = &__c_dot_utf8
-+};
-+
-+int __loc_is_allocated(locale_t loc)
-+{
-+ return loc && loc != &c_locale && loc != &c_dot_utf8_locale;
-+}
-+
- locale_t __newlocale(int mask, const char *name, locale_t loc)
- {
-- int i;
-+ int i, j;
-+ struct __locale_struct tmp;
-+ const struct __locale_map *lm;
-
-- if (!loc) {
-- loc = calloc(1, sizeof *loc + LOCALE_NAME_MAX + 1);
-- if (!loc) return 0;
-- loc->messages_name = (void *)(loc+1);
-+ /* For locales with allocated storage, modify in-place. */
-+ if (__loc_is_allocated(loc)) {
- for (i=0; i<LC_ALL; i++)
-- if (!(mask & (1<<i)))
-- __setlocalecat(loc, i, "");
-+ if (mask & (1<<i))
-+ loc->cat[i] = __get_locale(i, name);
-+ return loc;
-+ }
-+
-+ /* Otherwise, build a temporary locale object, which will only
-+ * be instantiated in allocated storage if it does not match
-+ * one of the built-in static locales. This makes the common
-+ * usage case for newlocale, getting a C locale with predictable
-+ * behavior, very fast, and more importantly, fail-safe. */
-+ for (j=i=0; i<LC_ALL; i++) {
-+ if (loc && !(mask & (1<<i)))
-+ lm = loc->cat[i];
-+ else
-+ lm = __get_locale(i, mask & (1<<i) ? name : "");
-+ if (lm) j++;
-+ tmp.cat[i] = lm;
- }
-
-- for (i=0; i<LC_ALL; i++)
-- if (mask & (1<<i))
-- __setlocalecat(loc, i, name);
-+ if (!j)
-+ return (locale_t)&c_locale;
-+ if (j==1 && tmp.cat[LC_CTYPE]==c_dot_utf8_locale.cat[LC_CTYPE])
-+ return (locale_t)&c_dot_utf8_locale;
-+
-+ if ((loc = malloc(sizeof *loc))) *loc = tmp;
-
- return loc;
- }
---- a/src/locale/setlocale.c
-+++ b/src/locale/setlocale.c
-@@ -5,73 +5,66 @@
- #include "libc.h"
- #include "atomic.h"
-
--static char buf[2+4*(LOCALE_NAME_MAX+1)];
-+static char buf[LC_ALL*(LOCALE_NAME_MAX+1)];
-
--char *setlocale(int cat, const char *name)
-+static char *setlocale_one_unlocked(int cat, const char *name)
- {
-- struct __locale_map *lm;
-- int i, j;
-+ const struct __locale_map *lm;
-
-- if (!libc.global_locale.messages_name) {
-- libc.global_locale.messages_name =
-- buf + 2 + 3*(LOCALE_NAME_MAX+1);
-- }
-+ if (name) libc.global_locale.cat[cat] = lm = __get_locale(cat, name);
-+ else lm = libc.global_locale.cat[cat];
-+
-+ return lm ? (char *)lm->name : "C";
-+}
-+
-+char *__strchrnul(const char *, int);
-+
-+char *setlocale(int cat, const char *name)
-+{
-+ static volatile int lock[2];
-
- if ((unsigned)cat > LC_ALL) return 0;
-
-+ LOCK(lock);
-+
- /* For LC_ALL, setlocale is required to return a string which
- * encodes the current setting for all categories. The format of
- * this string is unspecified, and only the following code, which
- * performs both the serialization and deserialization, depends
- * on the format, so it can easily be changed if needed. */
- if (cat == LC_ALL) {
-+ int i;
- if (name) {
-- char part[LOCALE_NAME_MAX+1];
-- if (name[0] && name[1]==';'
-- && strlen(name) > 2 + 3*(LOCALE_NAME_MAX+1)) {
-- part[0] = name[0];
-- part[1] = 0;
-- setlocale(LC_CTYPE, part);
-- part[LOCALE_NAME_MAX] = 0;
-- for (i=LC_TIME; i<LC_MESSAGES; i++) {
-- memcpy(part, name + 2 + (i-2)*(LOCALE_NAME_MAX+1), LOCALE_NAME_MAX);
-- for (j=LOCALE_NAME_MAX-1; j && part[j]==';'; j--)
-- part[j] = 0;
-- setlocale(i, part);
-+ char part[LOCALE_NAME_MAX+1] = "C.UTF-8";
-+ const char *p = name;
-+ for (i=0; i<LC_ALL; i++) {
-+ const char *z = __strchrnul(p, ';');
-+ if (z-p <= LOCALE_NAME_MAX) {
-+ memcpy(part, p, z-p);
-+ part[z-p] = 0;
-+ if (*z) p = z+1;
- }
-- setlocale(LC_MESSAGES, name + 2 + 3*(LOCALE_NAME_MAX+1));
-- } else {
-- for (i=0; i<LC_ALL; i++)
-- setlocale(i, name);
-+ setlocale_one_unlocked(i, part);
- }
- }
-- memset(buf, ';', 2 + 3*(LOCALE_NAME_MAX+1));
-- buf[0] = libc.global_locale.ctype_utf8 ? 'U' : 'C';
-- for (i=LC_TIME; i<LC_MESSAGES; i++) {
-- lm = libc.global_locale.cat[i-2];
-- if (lm) memcpy(buf + 2 + (i-2)*(LOCALE_NAME_MAX+1),
-- lm->name, strlen(lm->name));
-+ char *s = buf;
-+ for (i=0; i<LC_ALL; i++) {
-+ const struct __locale_map *lm =
-+ libc.global_locale.cat[i];
-+ const char *part = lm ? lm->name : "C";
-+ size_t l = strlen(part);
-+ memcpy(s, part, l);
-+ s[l] = ';';
-+ s += l+1;
- }
-+ *--s = 0;
-+ UNLOCK(lock);
- return buf;
- }
-
-- if (name) {
-- int adj = libc.global_locale.ctype_utf8;
-- __setlocalecat(&libc.global_locale, cat, name);
-- adj -= libc.global_locale.ctype_utf8;
-- if (adj) a_fetch_add(&libc.bytelocale_cnt_minus_1, adj);
-- }
-+ char *ret = setlocale_one_unlocked(cat, name);
-
-- switch (cat) {
-- case LC_CTYPE:
-- return libc.global_locale.ctype_utf8 ? "C.UTF-8" : "C";
-- case LC_NUMERIC:
-- return "C";
-- case LC_MESSAGES:
-- return libc.global_locale.messages_name[0]
-- ? libc.global_locale.messages_name : "C";
-- default:
-- lm = libc.global_locale.cat[cat-2];
-- return lm ? lm->name : "C";
-- }
-+ UNLOCK(lock);
-+
-+ return ret;
- }
---- a/src/locale/uselocale.c
-+++ b/src/locale/uselocale.c
-@@ -10,15 +10,7 @@ locale_t __uselocale(locale_t new)
-
- if (new == LC_GLOBAL_LOCALE) new = global;
-
-- if (new && new != old) {
-- int adj = 0;
-- if (new == global) a_dec(&libc.uselocale_cnt);
-- else if (!new->ctype_utf8) adj++;
-- if (old == global) a_inc(&libc.uselocale_cnt);
-- else if (!old->ctype_utf8) adj--;
-- a_fetch_add(&libc.bytelocale_cnt_minus_1, adj);
-- self->locale = new;
-- }
-+ self->locale = new;
-
- return old == global ? LC_GLOBAL_LOCALE : old;
- }
---- a/src/stdio/__stdio_read.c
-+++ b/src/stdio/__stdio_read.c
-@@ -21,7 +21,6 @@ size_t __stdio_read(FILE *f, unsigned ch
- pthread_cleanup_pop(0);
- if (cnt <= 0) {
- f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
-- f->rpos = f->rend = 0;
- return cnt;
- }
- if (cnt <= iov[0].iov_len) return cnt;
---- a/src/stdio/__toread.c
-+++ b/src/stdio/__toread.c
-@@ -5,12 +5,12 @@ int __toread(FILE *f)
- f->mode |= f->mode-1;
- if (f->wpos > f->buf) f->write(f, 0, 0);
- f->wpos = f->wbase = f->wend = 0;
-- if (f->flags & (F_EOF|F_NORD)) {
-- if (f->flags & F_NORD) f->flags |= F_ERR;
-+ if (f->flags & F_NORD) {
-+ f->flags |= F_ERR;
- return EOF;
- }
-- f->rpos = f->rend = f->buf;
-- return 0;
-+ f->rpos = f->rend = f->buf + f->buf_size;
-+ return (f->flags & F_EOF) ? EOF : 0;
- }
-
- void __stdio_exit_needed(void);
---- a/src/stdio/__uflow.c
-+++ b/src/stdio/__uflow.c
-@@ -1,11 +1,11 @@
- #include "stdio_impl.h"
-
--/* This function will never be called if there is already data
-- * buffered for reading. Thus we can get by with very few branches. */
-+/* This function assumes it will never be called if there is already
-+ * data buffered for reading. */
-
- int __uflow(FILE *f)
- {
- unsigned char c;
-- if ((f->rend || !__toread(f)) && f->read(f, &c, 1)==1) return c;
-+ if (!__toread(f) && f->read(f, &c, 1)==1) return c;
- return EOF;
- }
---- a/src/stdio/ungetc.c
-+++ b/src/stdio/ungetc.c
-@@ -6,7 +6,8 @@ int ungetc(int c, FILE *f)
-
- FLOCK(f);
-
-- if ((!f->rend && __toread(f)) || f->rpos <= f->buf - UNGET) {
-+ if (!f->rpos) __toread(f);
-+ if (!f->rpos || f->rpos <= f->buf - UNGET) {
- FUNLOCK(f);
- return EOF;
- }
---- a/src/stdio/ungetwc.c
-+++ b/src/stdio/ungetwc.c
-@@ -19,7 +19,8 @@ wint_t ungetwc(wint_t c, FILE *f)
-
- f->mode |= f->mode+1;
-
-- if ((!f->rend && __toread(f)) || f->rpos < f->buf - UNGET + l) {
-+ if (!f->rpos) __toread(f);
-+ if (!f->rpos || f->rpos < f->buf - UNGET + l) {
- FUNLOCK(f);
- return EOF;
- }
---- a/src/thread/i386/__set_thread_area.s
-+++ b/src/thread/i386/__set_thread_area.s
-@@ -6,10 +6,10 @@ __set_thread_area:
- push $0x51
- push $0xfffff
- push 16(%esp)
-- xor %edx,%edx
-- mov %gs,%dx
-- sub $3,%edx
-- sar $3,%edx
-+ call 1f
-+1: addl $4f-1b,(%esp)
-+ pop %ecx
-+ mov (%ecx),%edx
- push %edx
- mov %esp,%ebx
- xor %eax,%eax
-@@ -18,6 +18,7 @@ __set_thread_area:
- testl %eax,%eax
- jnz 2f
- movl (%esp),%edx
-+ movl %edx,(%ecx)
- leal 3(,%edx,8),%edx
- 3: movw %dx,%gs
- 1:
-@@ -38,3 +39,7 @@ __set_thread_area:
- mov $7,%dl
- inc %al
- jmp 3b
-+
-+.data
-+ .align 4
-+4: .long -1
---- a/src/thread/mips/syscall_cp.s
-+++ b/src/thread/mips/syscall_cp.s
-@@ -2,10 +2,13 @@
-
- .global __cp_begin
- .hidden __cp_begin
-+.type __cp_begin,@function
- .global __cp_end
- .hidden __cp_end
-+.type __cp_end,@function
- .global __cp_cancel
- .hidden __cp_cancel
-+.type __cp_cancel,@function
- .hidden __cancel
- .global __syscall_cp_asm
- .hidden __syscall_cp_asm
---- a/src/thread/pthread_create.c
-+++ b/src/thread/pthread_create.c
-@@ -67,12 +67,6 @@ _Noreturn void __pthread_exit(void *resu
- exit(0);
- }
-
-- if (self->locale != &libc.global_locale) {
-- a_dec(&libc.uselocale_cnt);
-- if (self->locale->ctype_utf8)
-- a_dec(&libc.bytelocale_cnt_minus_1);
-- }
--
- /* Process robust list in userspace to handle non-pshared mutexes
- * and the detached thread case where the robust list head will
- * be invalid when the kernel would process it. */
--- /dev/null
+commit 1b0cdc8700d29ef018bf226d74b2b58b23bce91c
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 16 07:11:19 2015 +0000
+
+ refactor stdio open file list handling, move it out of global libc struct
+
+ functions which open in-memory FILE stream variants all shared a tail
+ with __fdopen, adding the FILE structure to stdio's open file list.
+ replacing this common tail with a function call reduces code size and
+ duplication of logic. the list is also partially encapsulated now.
+
+ function signatures were chosen to facilitate tail call optimization
+ and reduce the need for additional accessor functions.
+
+ with these changes, static linked programs that do not use stdio no
+ longer have an open file list at all.
+
+commit f22a9edaf8a6f2ca1d314d18b3785558279a5c03
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 16 06:18:00 2015 +0000
+
+ byte-based C locale, phase 3: make MB_CUR_MAX variable to activate code
+
+ this patch activates the new byte-based C locale (high bytes treated
+ as abstract code unit "characters" rather than decoded as multibyte
+ characters) by making the value of MB_CUR_MAX depend on the active
+ locale. for the C locale, the LC_CTYPE category pointer is null,
+ yielding a value of 1. all other locales yield a value of 4.
+
+commit 16f18d036d9a7bf590ee6eb86785c0a9658220b6
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 16 05:35:31 2015 +0000
+
+ byte-based C locale, phase 2: stdio and iconv (multibyte callers)
+
+ this patch adjusts libc components which use the multibyte functions
+ internally, and which depend on them operating in a particular
+ encoding, to make the appropriate locale changes before calling them
+ and restore the calling thread's locale afterwards. activating the
+ byte-based C locale without these changes would cause regressions in
+ stdio and iconv.
+
+ in the case of iconv, the current implementation was simply using the
+ multibyte functions as UTF-8 conversions. setting a multibyte UTF-8
+ locale for the duration of the iconv operation allows the code to
+ continue working.
+
+ in the case of stdio, POSIX requires that FILE streams have an
+ encoding rule bound at the time of setting wide orientation. as long
+ as all locales, including the C locale, used the same encoding,
+ treating high bytes as UTF-8, there was no need to store an encoding
+ rule as part of the stream's state.
+
+ a new locale field in the FILE structure points to the locale that
+ should be made active during fgetwc/fputwc/ungetwc on the stream. it
+ cannot point to the locale active at the time the stream becomes
+ oriented, because this locale could be mutable (the global locale) or
+ could be destroyed (locale_t objects produced by newlocale) before the
+ stream is closed. instead, a pointer to the static C or C.UTF-8 locale
+ object added in commit commit aeeac9ca5490d7d90fe061ab72da446c01ddf746
+ is used. this is valid since categories other than LC_CTYPE will not
+ affect these functions.
+
+commit 1507ebf837334e9e07cfab1ca1c2e88449069a80
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 16 04:44:17 2015 +0000
+
+ byte-based C locale, phase 1: multibyte character handling functions
+
+ this patch makes the functions which work directly on multibyte
+ characters treat the high bytes as individual abstract code units
+ rather than as multibyte sequences when MB_CUR_MAX is 1. since
+ MB_CUR_MAX is presently defined as a constant 4, all of the new code
+ added is dead code, and optimizing compilers' code generation should
+ not be affected at all. a future commit will activate the new code.
+
+ as abstract code units, bytes 0x80 to 0xff are represented by wchar_t
+ values 0xdf80 to 0xdfff, at the end of the surrogates range. this
+ ensures that they will never be misinterpreted as Unicode characters,
+ and that all wctype functions return false for these "characters"
+ without needing locale-specific logic. a high range outside of Unicode
+ such as 0x7fffff80 to 0x7fffffff was also considered, but since C11's
+ char16_t also needs to be able to represent conversions of these
+ bytes, the surrogate range was the natural choice.
+
+commit 38e2f727237230300fea6aff68802db04625fd23
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 16 04:21:38 2015 +0000
+
+ fix btowc corner case
+
+ btowc is required to interpret its argument by conversion to unsigned
+ char, unless the argument is equal to EOF. since the conversion to
+ produces a non-character value anyway, we can just unconditionally
+ convert, for now.
+
+commit ee59c296d56bf26f49f354d6eb32b4b6d4190188
+Author: Szabolcs Nagy <nsz@port70.net>
+Date: Wed Jun 3 10:32:14 2015 +0100
+
+ arm: add vdso support
+
+ vdso will be available on arm in linux v4.2, the user-space code
+ for it is in kernel commit 8512287a8165592466cb9cb347ba94892e9c56a5
+
+commit e3bc22f1eff87b8f029a6ab31f1a269d69e4b053
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sun Jun 14 01:59:02 2015 +0000
+
+ refactor malloc's expand_heap to share with __simple_malloc
+
+ this extends the brk/stack collision protection added to full malloc
+ in commit 276904c2f6bde3a31a24ebfa201482601d18b4f9 to also protect the
+ __simple_malloc function used in static-linked programs that don't
+ reference the free function.
+
+ it also extends support for using mmap when brk fails, which full
+ malloc got in commit 5446303328adf4b4e36d9fba21848e6feb55fab4, to
+ __simple_malloc.
+
+ since __simple_malloc may expand the heap by arbitrarily large
+ increments, the stack collision detection is enhanced to detect
+ interval overlap rather than just proximity of a single address to the
+ stack. code size is increased a bit, but this is partly offset by the
+ sharing of code between the two malloc implementations, which due to
+ linking semantics, both get linked in a program that needs the full
+ malloc with realloc/free support.
+
+commit 4ef9b828c1f39553a69e0635ac91f0fcadd6e8c6
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 13 20:53:02 2015 +0000
+
+ remove cancellation points in stdio
+
+ commit 58165923890865a6ac042fafce13f440ee986fd9 added these optional
+ cancellation points on the basis that cancellable stdio could be
+ useful, to unblock threads stuck on stdio operations that will never
+ complete. however, the only way to ensure that cancellation can
+ achieve this is to violate the rules for side effects when
+ cancellation is acted upon, discarding knowledge of any partial data
+ transfer already completed. our implementation exhibited this behavior
+ and was thus non-conforming.
+
+ in addition to improving correctness, removing these cancellation
+ points moderately reduces code size, and should significantly improve
+ performance on i386, where sysenter/syscall instructions can be used
+ instead of "int $128" for non-cancellable syscalls.
+
+commit 536c6d5a4205e2a3f161f2983ce1e0ac3082187d
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 13 05:17:16 2015 +0000
+
+ fix idiom for setting stdio stream orientation to wide
+
+ the old idiom, f->mode |= f->mode+1, was adapted from the idiom for
+ setting byte orientation, f->mode |= f->mode-1, but the adaptation was
+ incorrect. unless the stream was alreasdy set byte-oriented, this code
+ incremented f->mode each time it was executed, which would eventually
+ lead to overflow. it could be fixed by changing it to f->mode |= 1,
+ but upcoming changes will require slightly more work at the time of
+ wide orientation, so it makes sense to just call fwide. as an
+ optimization in the single-character functions, fwide is only called
+ if the stream is not already wide-oriented.
+
+commit f8f565df467c13248104223f99abf7f37cef7584
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 13 04:42:38 2015 +0000
+
+ add printing of null %s arguments as "(null)" in wide printf
+
+ this is undefined, but supported in our implementation of the normal
+ printf, so for consistency the wide variant should support it too.
+
+commit f9e25d813860d53cd1e9b6145cc63375d2fe2529
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 13 04:37:27 2015 +0000
+
+ add %m support to wide printf
+
+commit ec634aad91f57479ef17525e33ed446c780a61f4
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Thu Jun 11 05:01:04 2015 +0000
+
+ add sh asm for vfork
+
+commit c30cbcb0a646b1f13a22c645616dce624465b883
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Wed Jun 10 02:27:40 2015 +0000
+
+ implement arch-generic version of __unmapself
+
+ this can be used to put off writing an asm version of __unmapself for
+ new archs, or as a permanent solution on archs where it's not
+ practical or even possible to run momentarily with no stack.
+
+ the concept here is simple: the caller takes a lock on a global shared
+ stack and uses it to make the munmap and exit syscalls. the only trick
+ is unlocking, which must be done after the thread exits, and this is
+ achieved by using the set_tid_address syscall to have the kernel zero
+ and futex-wake the lock word as part of the exit syscall.
+
+commit 276904c2f6bde3a31a24ebfa201482601d18b4f9
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 9 20:30:35 2015 +0000
+
+ in malloc, refuse to use brk if it grows into stack
+
+ the linux/nommu fdpic ELF loader sets up the brk range to overlap
+ entirely with the main thread's stack (but growing from opposite
+ ends), so that the resulting failure mode for malloc is not to return
+ a null pointer but to start returning pointers to memory that overlaps
+ with the caller's stack. needless to say this extremely dangerous and
+ makes brk unusable.
+
+ since it's non-trivial to detect execution environments that might be
+ affected by this kernel bug, and since the severity of the bug makes
+ any sort of detection that might yield false-negatives unsafe, we
+ instead check the proximity of the brk to the stack pointer each time
+ the brk is to be expanded. both the main thread's stack (where the
+ real known risk lies) and the calling thread's stack are checked. an
+ arbitrary gap distance of 8 MB is imposed, chosen to be larger than
+ linux default main-thread stack reservation sizes and larger than any
+ reasonable stack configuration on nommu.
+
+ the effeciveness of this patch relies on an assumption that the amount
+ by which the brk is being grown is smaller than the gap limit, which
+ is always true for malloc's use of brk. reliance on this assumption is
+ why the check is being done in malloc-specific code and not in __brk.
+
+commit bd1eaceaa3975bd2a2a34e211cff896affaecadf
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Tue Jun 9 20:09:27 2015 +0000
+
+ fix spurious errors from pwd/grp functions when nscd backend is absent
+
+ for several pwd/grp functions, the only way the caller can distinguish
+ between a successful negative result ("no such user/group") and an
+ internal error is by clearing errno before the call and checking errno
+ afterwards. the nscd backend support code correctly simulated a
+ not-found response on systems where such a backend is not running, but
+ failed to restore errno.
+
+ this commit also fixed an outdated/incorrect comment.
+
+commit 75ce4503950621b11fcc7f1fd1187dbcf3cde312
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sun Jun 7 20:55:23 2015 +0000
+
+ fix regression in pre-v7 arm on kernels with kuser helper removed
+
+ the arm atomics/TLS runtime selection code is called from
+ __set_thread_area and depends on having libc.auxv and __hwcap
+ available. commit 71f099cb7db821c51d8f39dfac622c61e54d794c moved the
+ first call to __set_thread_area to the top of dynamic linking stage 3,
+ before this data is made available, causing the runtime detection code
+ to always see __hwcap as zero and thereby select the atomics/TLS
+ implementations based on kuser helper.
+
+ upcoming work on superh will use similar runtime detection.
+
+ ideally this early-init code should be cleanly refactored and shared
+ between the dynamic linker and static-linked startup.
+
+commit 32f3c4f70633488550c29a2444f819aafdf345ff
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sun Jun 7 03:09:16 2015 +0000
+
+ add multiple inclusion guard to locale_impl.h
+
+commit 04b8360adbb6487f61aa0c00e53ec3a90a5a0d29
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sun Jun 7 02:59:49 2015 +0000
+
+ remove redefinition of MB_CUR_MAX in locale_impl.h
+
+ unless/until the byte-based C locale is implemented, defining
+ MB_CUR_MAX to 1 in the C locale is wrong. no internal code currently
+ uses the MB_CUR_MAX macro, but having it defined inconsistently is
+ error-prone. applications get the value from stdlib.h and were
+ unaffected.
+
+commit 16bf466532d7328e971012b0731ad493b017ad29
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 6 18:53:02 2015 +0000
+
+ make static C and C.UTF-8 locales available outside of newlocale
+
+commit 312eea2ea4f4363fb01b73660c08bfcf43dd3bb4
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 6 18:20:30 2015 +0000
+
+ remove another invalid skip of locking in ungetwc
+
+commit 3d7e32d28dc9962e9efc1c317c5b44b5b2df3008
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 6 18:16:22 2015 +0000
+
+ add macro version of ctype.h isascii function
+
+ presumably internal code (ungetwc and fputwc) was written assuming a
+ macro implementation existed; otherwise use of isascii is just a
+ pessimization.
+
+commit 7e816a6487932cbb3cb71d94b609e50e81f4e5bf
+Author: Rich Felker <dalias@aerifal.cx>
+Date: Sat Jun 6 18:11:17 2015 +0000
+
+ remove invalid skip of locking in ungetwc
+
+ aside from being invalid, the early check only optimized the error
+ case, and likely pessimized the common case by separating the
+ two branches on isascii(c) at opposite ends of the function.
+
+commit 63f4b9f18f3674124d8bcb119739fec85e6da005
+Author: Timo Teräs <timo.teras@iki.fi>
+Date: Fri Jun 5 10:39:42 2015 +0300
+
+ fix uselocale((locale_t)0) not to modify locale
+
+ commit 68630b55c0c7219fe9df70dc28ffbf9efc8021d8 made the new locale to
+ be assigned unconditonally resulting in crashes later on.
+
+--- a/arch/arm/syscall_arch.h
++++ b/arch/arm/syscall_arch.h
+@@ -72,3 +72,7 @@ static inline long __syscall6(long n, lo
+ register long r5 __asm__("r5") = f;
+ __asm_syscall("r"(r7), "0"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5));
+ }
++
++#define VDSO_USEFUL
++#define VDSO_CGT_SYM "__vdso_clock_gettime"
++#define VDSO_CGT_VER "LINUX_2.6"
+--- a/include/ctype.h
++++ b/include/ctype.h
+@@ -64,6 +64,7 @@ int isascii(int);
+ int toascii(int);
+ #define _tolower(a) ((a)|0x20)
+ #define _toupper(a) ((a)&0x5f)
++#define isascii(a) (0 ? isascii(a) : (unsigned)(a) < 128)
+
+ #endif
+
+--- a/include/stdlib.h
++++ b/include/stdlib.h
+@@ -76,7 +76,8 @@ size_t wcstombs (char *__restrict, const
+ #define EXIT_FAILURE 1
+ #define EXIT_SUCCESS 0
+
+-#define MB_CUR_MAX ((size_t)+4)
++size_t __ctype_get_mb_cur_max(void);
++#define MB_CUR_MAX (__ctype_get_mb_cur_max())
+
+ #define RAND_MAX (0x7fffffff)
+
+--- a/src/ctype/__ctype_get_mb_cur_max.c
++++ b/src/ctype/__ctype_get_mb_cur_max.c
+@@ -1,6 +1,7 @@
+-#include <stddef.h>
++#include <stdlib.h>
++#include "locale_impl.h"
+
+ size_t __ctype_get_mb_cur_max()
+ {
+- return 4;
++ return MB_CUR_MAX;
+ }
+--- a/src/ctype/isascii.c
++++ b/src/ctype/isascii.c
+@@ -1,4 +1,5 @@
+ #include <ctype.h>
++#undef isascii
+
+ int isascii(int c)
+ {
+--- a/src/internal/libc.h
++++ b/src/internal/libc.h
+@@ -17,8 +17,6 @@ struct __libc {
+ int secure;
+ volatile int threads_minus_1;
+ size_t *auxv;
+- FILE *ofl_head;
+- volatile int ofl_lock[2];
+ size_t tls_size;
+ size_t page_size;
+ struct __locale_struct global_locale;
+--- a/src/internal/locale_impl.h
++++ b/src/internal/locale_impl.h
+@@ -1,3 +1,6 @@
++#ifndef _LOCALE_IMPL_H
++#define _LOCALE_IMPL_H
++
+ #include <locale.h>
+ #include <stdlib.h>
+ #include "libc.h"
+@@ -12,6 +15,10 @@ struct __locale_map {
+ const struct __locale_map *next;
+ };
+
++extern const struct __locale_map __c_dot_utf8;
++extern const struct __locale_struct __c_locale;
++extern const struct __locale_struct __c_dot_utf8_locale;
++
+ const struct __locale_map *__get_locale(int, const char *);
+ const char *__mo_lookup(const void *, size_t, const char *);
+ const char *__lctrans(const char *, const struct __locale_map *);
+@@ -20,9 +27,14 @@ const char *__lctrans_cur(const char *);
+ #define LCTRANS(msg, lc, loc) __lctrans(msg, (loc)->cat[(lc)])
+ #define LCTRANS_CUR(msg) __lctrans_cur(msg)
+
++#define C_LOCALE ((locale_t)&__c_locale)
++#define UTF8_LOCALE ((locale_t)&__c_dot_utf8_locale)
++
+ #define CURRENT_LOCALE (__pthread_self()->locale)
+
+ #define CURRENT_UTF8 (!!__pthread_self()->locale->cat[LC_CTYPE])
+
+ #undef MB_CUR_MAX
+ #define MB_CUR_MAX (CURRENT_UTF8 ? 4 : 1)
++
++#endif
+--- a/src/internal/stdio_impl.h
++++ b/src/internal/stdio_impl.h
+@@ -47,6 +47,7 @@ struct _IO_FILE {
+ unsigned char *shend;
+ off_t shlim, shcnt;
+ FILE *prev_locked, *next_locked;
++ struct __locale_struct *locale;
+ };
+
+ size_t __stdio_read(FILE *, unsigned char *, size_t);
+@@ -75,8 +76,9 @@ int __putc_unlocked(int, FILE *);
+ FILE *__fdopen(int, const char *);
+ int __fmodeflags(const char *);
+
+-#define OFLLOCK() LOCK(libc.ofl_lock)
+-#define OFLUNLOCK() UNLOCK(libc.ofl_lock)
++FILE *__ofl_add(FILE *f);
++FILE **__ofl_lock(void);
++void __ofl_unlock(void);
+
+ #define feof(f) ((f)->flags & F_EOF)
+ #define ferror(f) ((f)->flags & F_ERR)
+--- a/src/ldso/dynlink.c
++++ b/src/ldso/dynlink.c
+@@ -1192,6 +1192,17 @@ _Noreturn void __dls3(size_t *sp)
+ char **argv_orig = argv;
+ char **envp = argv+argc+1;
+
++ /* Find aux vector just past environ[] and use it to initialize
++ * global data that may be needed before we can make syscalls. */
++ __environ = envp;
++ for (i=argc+1; argv[i]; i++);
++ libc.auxv = auxv = (void *)(argv+i+1);
++ decode_vec(auxv, aux, AUX_CNT);
++ __hwcap = aux[AT_HWCAP];
++ libc.page_size = aux[AT_PAGESZ];
++ libc.secure = ((aux[0]&0x7800)!=0x7800 || aux[AT_UID]!=aux[AT_EUID]
++ || aux[AT_GID]!=aux[AT_EGID] || aux[AT_SECURE]);
++
+ /* Setup early thread pointer in builtin_tls for ldso/libc itself to
+ * use during dynamic linking. If possible it will also serve as the
+ * thread pointer at runtime. */
+@@ -1200,25 +1211,11 @@ _Noreturn void __dls3(size_t *sp)
+ a_crash();
+ }
+
+- /* Find aux vector just past environ[] */
+- for (i=argc+1; argv[i]; i++)
+- if (!memcmp(argv[i], "LD_LIBRARY_PATH=", 16))
+- env_path = argv[i]+16;
+- else if (!memcmp(argv[i], "LD_PRELOAD=", 11))
+- env_preload = argv[i]+11;
+- auxv = (void *)(argv+i+1);
+-
+- decode_vec(auxv, aux, AUX_CNT);
+-
+ /* Only trust user/env if kernel says we're not suid/sgid */
+- if ((aux[0]&0x7800)!=0x7800 || aux[AT_UID]!=aux[AT_EUID]
+- || aux[AT_GID]!=aux[AT_EGID] || aux[AT_SECURE]) {
+- env_path = 0;
+- env_preload = 0;
+- libc.secure = 1;
++ if (!libc.secure) {
++ env_path = getenv("LD_LIBRARY_PATH");
++ env_preload = getenv("LD_PRELOAD");
+ }
+- libc.page_size = aux[AT_PAGESZ];
+- libc.auxv = auxv;
+
+ /* If the main program was already loaded by the kernel,
+ * AT_PHDR will point to some location other than the dynamic
+--- /dev/null
++++ b/src/locale/c_locale.c
+@@ -0,0 +1,15 @@
++#include "locale_impl.h"
++#include <stdint.h>
++
++static const uint32_t empty_mo[] = { 0x950412de, 0, -1, -1, -1 };
++
++const struct __locale_map __c_dot_utf8 = {
++ .map = empty_mo,
++ .map_size = sizeof empty_mo,
++ .name = "C.UTF-8"
++};
++
++const struct __locale_struct __c_locale = { 0 };
++const struct __locale_struct __c_dot_utf8_locale = {
++ .cat[LC_CTYPE] = &__c_dot_utf8
++};
+--- a/src/locale/iconv.c
++++ b/src/locale/iconv.c
+@@ -5,6 +5,7 @@
+ #include <stdlib.h>
+ #include <limits.h>
+ #include <stdint.h>
++#include "locale_impl.h"
+
+ #define UTF_32BE 0300
+ #define UTF_16LE 0301
+@@ -165,9 +166,12 @@ size_t iconv(iconv_t cd0, char **restric
+ int err;
+ unsigned char type = map[-1];
+ unsigned char totype = tomap[-1];
++ locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
+
+ if (!in || !*in || !*inb) return 0;
+
++ *ploc = UTF8_LOCALE;
++
+ for (; *inb; *in+=l, *inb-=l) {
+ c = *(unsigned char *)*in;
+ l = 1;
+@@ -431,6 +435,7 @@ size_t iconv(iconv_t cd0, char **restric
+ break;
+ }
+ }
++ *ploc = loc;
+ return x;
+ ilseq:
+ err = EILSEQ;
+@@ -445,5 +450,6 @@ starved:
+ x = -1;
+ end:
+ errno = err;
++ *ploc = loc;
+ return x;
+ }
+--- a/src/locale/langinfo.c
++++ b/src/locale/langinfo.c
+@@ -33,7 +33,8 @@ char *__nl_langinfo_l(nl_item item, loca
+ int idx = item & 65535;
+ const char *str;
+
+- if (item == CODESET) return "UTF-8";
++ if (item == CODESET)
++ return MB_CUR_MAX==1 ? "UTF-8-CODE-UNITS" : "UTF-8";
+
+ switch (cat) {
+ case LC_NUMERIC:
+--- a/src/locale/locale_map.c
++++ b/src/locale/locale_map.c
+@@ -24,14 +24,6 @@ static const char envvars[][12] = {
+ "LC_MESSAGES",
+ };
+
+-static const uint32_t empty_mo[] = { 0x950412de, 0, -1, -1, -1 };
+-
+-const struct __locale_map __c_dot_utf8 = {
+- .map = empty_mo,
+- .map_size = sizeof empty_mo,
+- .name = "C.UTF-8"
+-};
+-
+ const struct __locale_map *__get_locale(int cat, const char *val)
+ {
+ static int lock[2];
+@@ -107,8 +99,8 @@ const struct __locale_map *__get_locale(
+ * sake of being able to do message translations at the
+ * application level. */
+ if (!new && (new = malloc(sizeof *new))) {
+- new->map = empty_mo;
+- new->map_size = sizeof empty_mo;
++ new->map = __c_dot_utf8.map;
++ new->map_size = __c_dot_utf8.map_size;
+ memcpy(new->name, val, n);
+ new->name[n] = 0;
+ new->next = loc_head;
+--- a/src/locale/newlocale.c
++++ b/src/locale/newlocale.c
+@@ -3,16 +3,9 @@
+ #include "locale_impl.h"
+ #include "libc.h"
+
+-extern const struct __locale_map __c_dot_utf8;
+-
+-static const struct __locale_struct c_locale = { 0 };
+-static const struct __locale_struct c_dot_utf8_locale = {
+- .cat[LC_CTYPE] = &__c_dot_utf8
+-};
+-
+ int __loc_is_allocated(locale_t loc)
+ {
+- return loc && loc != &c_locale && loc != &c_dot_utf8_locale;
++ return loc && loc != C_LOCALE && loc != UTF8_LOCALE;
+ }
+
+ locale_t __newlocale(int mask, const char *name, locale_t loc)
+@@ -44,9 +37,9 @@ locale_t __newlocale(int mask, const cha
+ }
+
+ if (!j)
+- return (locale_t)&c_locale;
+- if (j==1 && tmp.cat[LC_CTYPE]==c_dot_utf8_locale.cat[LC_CTYPE])
+- return (locale_t)&c_dot_utf8_locale;
++ return C_LOCALE;
++ if (j==1 && tmp.cat[LC_CTYPE]==&__c_dot_utf8)
++ return UTF8_LOCALE;
+
+ if ((loc = malloc(sizeof *loc))) *loc = tmp;
+
+--- a/src/locale/uselocale.c
++++ b/src/locale/uselocale.c
+@@ -8,9 +8,7 @@ locale_t __uselocale(locale_t new)
+ locale_t old = self->locale;
+ locale_t global = &libc.global_locale;
+
+- if (new == LC_GLOBAL_LOCALE) new = global;
+-
+- self->locale = new;
++ if (new) self->locale = new == LC_GLOBAL_LOCALE ? global : new;
+
+ return old == global ? LC_GLOBAL_LOCALE : old;
+ }
+--- /dev/null
++++ b/src/malloc/expand_heap.c
+@@ -0,0 +1,72 @@
++#include <limits.h>
++#include <stdint.h>
++#include <errno.h>
++#include <sys/mman.h>
++#include "libc.h"
++#include "syscall.h"
++
++/* This function returns true if the interval [old,new]
++ * intersects the 'len'-sized interval below &libc.auxv
++ * (interpreted as the main-thread stack) or below &b
++ * (the current stack). It is used to defend against
++ * buggy brk implementations that can cross the stack. */
++
++static int traverses_stack_p(uintptr_t old, uintptr_t new)
++{
++ const uintptr_t len = 8<<20;
++ uintptr_t a, b;
++
++ b = (uintptr_t)libc.auxv;
++ a = b > len ? b-len : 0;
++ if (new>a && old<b) return 1;
++
++ b = (uintptr_t)&b;
++ a = b > len ? b-len : 0;
++ if (new>a && old<b) return 1;
++
++ return 0;
++}
++
++void *__mmap(void *, size_t, int, int, int, off_t);
++
++/* Expand the heap in-place if brk can be used, or otherwise via mmap,
++ * using an exponential lower bound on growth by mmap to make
++ * fragmentation asymptotically irrelevant. The size argument is both
++ * an input and an output, since the caller needs to know the size
++ * allocated, which will be larger than requested due to page alignment
++ * and mmap minimum size rules. The caller is responsible for locking
++ * to prevent concurrent calls. */
++
++void *__expand_heap(size_t *pn)
++{
++ static uintptr_t brk;
++ static unsigned mmap_step;
++ size_t n = *pn;
++
++ if (n > SIZE_MAX/2 - PAGE_SIZE) {
++ errno = ENOMEM;
++ return 0;
++ }
++ n += -n & PAGE_SIZE-1;
++
++ if (!brk) {
++ brk = __syscall(SYS_brk, 0);
++ brk += -brk & PAGE_SIZE-1;
++ }
++
++ if (n < SIZE_MAX-brk && !traverses_stack_p(brk, brk+n)
++ && __syscall(SYS_brk, brk+n)==brk+n) {
++ *pn = n;
++ brk += n;
++ return (void *)(brk-n);
++ }
++
++ size_t min = (size_t)PAGE_SIZE << mmap_step/2;
++ if (n < min) n = min;
++ void *area = __mmap(0, n, PROT_READ|PROT_WRITE,
++ MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
++ if (area == MAP_FAILED) return 0;
++ *pn = n;
++ mmap_step++;
++ return area;
++}
+--- a/src/malloc/lite_malloc.c
++++ b/src/malloc/lite_malloc.c
+@@ -4,43 +4,46 @@
+ #include <errno.h>
+ #include "libc.h"
+
+-uintptr_t __brk(uintptr_t);
+-
+ #define ALIGN 16
+
++void *__expand_heap(size_t *);
++
+ void *__simple_malloc(size_t n)
+ {
+- static uintptr_t cur, brk;
+- uintptr_t base, new;
++ static char *cur, *end;
+ static volatile int lock[2];
+- size_t align=1;
++ size_t align=1, pad;
++ void *p;
+
+ if (!n) n++;
+- if (n > SIZE_MAX/2) goto toobig;
+-
+ while (align<n && align<ALIGN)
+ align += align;
+- n = n + align - 1 & -align;
+
+ LOCK(lock);
+- if (!cur) cur = brk = __brk(0)+16;
+- base = cur + align-1 & -align;
+- if (n > SIZE_MAX - PAGE_SIZE - base) goto fail;
+- if (base+n > brk) {
+- new = base+n + PAGE_SIZE-1 & -PAGE_SIZE;
+- if (__brk(new) != new) goto fail;
+- brk = new;
+- }
+- cur = base+n;
+- UNLOCK(lock);
+
+- return (void *)base;
++ pad = -(uintptr_t)cur & align-1;
++
++ if (n <= SIZE_MAX/2 + ALIGN) n += pad;
++
++ if (n > end-cur) {
++ size_t m = n;
++ char *new = __expand_heap(&m);
++ if (!new) {
++ UNLOCK(lock);
++ return 0;
++ }
++ if (new != end) {
++ cur = new;
++ n -= pad;
++ pad = 0;
++ }
++ end = new + m;
++ }
+
+-fail:
++ p = cur + pad;
++ cur += n;
+ UNLOCK(lock);
+-toobig:
+- errno = ENOMEM;
+- return 0;
++ return p;
+ }
+
+ weak_alias(__simple_malloc, malloc);
+--- a/src/malloc/malloc.c
++++ b/src/malloc/malloc.c
+@@ -13,7 +13,6 @@
+ #define inline inline __attribute__((always_inline))
+ #endif
+
+-uintptr_t __brk(uintptr_t);
+ void *__mmap(void *, size_t, int, int, int, off_t);
+ int __munmap(void *, size_t);
+ void *__mremap(void *, size_t, size_t, int, ...);
+@@ -31,13 +30,9 @@ struct bin {
+ };
+
+ static struct {
+- uintptr_t brk;
+- size_t *heap;
+ volatile uint64_t binmap;
+ struct bin bins[64];
+- volatile int brk_lock[2];
+ volatile int free_lock[2];
+- unsigned mmap_step;
+ } mal;
+
+
+@@ -152,69 +147,52 @@ void __dump_heap(int x)
+ }
+ #endif
+
++void *__expand_heap(size_t *);
++
+ static struct chunk *expand_heap(size_t n)
+ {
+- static int init;
++ static int heap_lock[2];
++ static void *end;
++ void *p;
+ struct chunk *w;
+- uintptr_t new;
+-
+- lock(mal.brk_lock);
+
+- if (!init) {
+- mal.brk = __brk(0);
+-#ifdef SHARED
+- mal.brk = mal.brk + PAGE_SIZE-1 & -PAGE_SIZE;
+-#endif
+- mal.brk = mal.brk + 2*SIZE_ALIGN-1 & -SIZE_ALIGN;
+- mal.heap = (void *)mal.brk;
+- init = 1;
++ /* The argument n already accounts for the caller's chunk
++ * overhead needs, but if the heap can't be extended in-place,
++ * we need room for an extra zero-sized sentinel chunk. */
++ n += SIZE_ALIGN;
++
++ lock(heap_lock);
++
++ p = __expand_heap(&n);
++ if (!p) {
++ unlock(heap_lock);
++ return 0;
+ }
+
+- if (n > SIZE_MAX - mal.brk - 2*PAGE_SIZE) goto fail;
+- new = mal.brk + n + SIZE_ALIGN + PAGE_SIZE - 1 & -PAGE_SIZE;
+- n = new - mal.brk;
+-
+- if (__brk(new) != new) {
+- size_t min = (size_t)PAGE_SIZE << mal.mmap_step/2;
+- n += -n & PAGE_SIZE-1;
+- if (n < min) n = min;
+- void *area = __mmap(0, n, PROT_READ|PROT_WRITE,
+- MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+- if (area == MAP_FAILED) goto fail;
+-
+- mal.mmap_step++;
+- area = (char *)area + SIZE_ALIGN - OVERHEAD;
+- w = area;
++ /* If not just expanding existing space, we need to make a
++ * new sentinel chunk below the allocated space. */
++ if (p != end) {
++ /* Valid/safe because of the prologue increment. */
+ n -= SIZE_ALIGN;
++ p = (char *)p + SIZE_ALIGN;
++ w = MEM_TO_CHUNK(p);
+ w->psize = 0 | C_INUSE;
+- w->csize = n | C_INUSE;
+- w = NEXT_CHUNK(w);
+- w->psize = n | C_INUSE;
+- w->csize = 0 | C_INUSE;
+-
+- unlock(mal.brk_lock);
+-
+- return area;
+ }
+
+- w = MEM_TO_CHUNK(mal.heap);
+- w->psize = 0 | C_INUSE;
+-
+- w = MEM_TO_CHUNK(new);
++ /* Record new heap end and fill in footer. */
++ end = (char *)p + n;
++ w = MEM_TO_CHUNK(end);
+ w->psize = n | C_INUSE;
+ w->csize = 0 | C_INUSE;
+
+- w = MEM_TO_CHUNK(mal.brk);
++ /* Fill in header, which may be new or may be replacing a
++ * zero-size sentinel header at the old end-of-heap. */
++ w = MEM_TO_CHUNK(p);
+ w->csize = n | C_INUSE;
+- mal.brk = new;
+-
+- unlock(mal.brk_lock);
++
++ unlock(heap_lock);
+
+ return w;
+-fail:
+- unlock(mal.brk_lock);
+- errno = ENOMEM;
+- return 0;
+ }
+
+ static int adjust_size(size_t *n)
+--- a/src/multibyte/btowc.c
++++ b/src/multibyte/btowc.c
+@@ -1,7 +1,10 @@
+ #include <stdio.h>
+ #include <wchar.h>
++#include <stdlib.h>
++#include "internal.h"
+
+ wint_t btowc(int c)
+ {
+- return c<128U ? c : EOF;
++ int b = (unsigned char)c;
++ return b<128U ? b : (MB_CUR_MAX==1 && c!=EOF) ? CODEUNIT(c) : WEOF;
+ }
+--- a/src/multibyte/internal.h
++++ b/src/multibyte/internal.h
+@@ -23,3 +23,10 @@ extern const uint32_t bittab[];
+
+ #define SA 0xc2u
+ #define SB 0xf4u
++
++/* Arbitrary encoding for representing code units instead of characters. */
++#define CODEUNIT(c) (0xdfff & (signed char)(c))
++#define IS_CODEUNIT(c) ((unsigned)(c)-0xdf80 < 0x80)
++
++/* Get inline definition of MB_CUR_MAX. */
++#include "locale_impl.h"
+--- a/src/multibyte/mbrtowc.c
++++ b/src/multibyte/mbrtowc.c
+@@ -4,6 +4,7 @@
+ * unnecessary.
+ */
+
++#include <stdlib.h>
+ #include <wchar.h>
+ #include <errno.h>
+ #include "internal.h"
+@@ -27,6 +28,7 @@ size_t mbrtowc(wchar_t *restrict wc, con
+ if (!n) return -2;
+ if (!c) {
+ if (*s < 0x80) return !!(*wc = *s);
++ if (MB_CUR_MAX==1) return (*wc = CODEUNIT(*s)), 1;
+ if (*s-SA > SB-SA) goto ilseq;
+ c = bittab[*s++-SA]; n--;
+ }
+--- a/src/multibyte/mbsrtowcs.c
++++ b/src/multibyte/mbsrtowcs.c
+@@ -7,6 +7,8 @@
+ #include <stdint.h>
+ #include <wchar.h>
+ #include <errno.h>
++#include <string.h>
++#include <stdlib.h>
+ #include "internal.h"
+
+ size_t mbsrtowcs(wchar_t *restrict ws, const char **restrict src, size_t wn, mbstate_t *restrict st)
+@@ -24,6 +26,23 @@ size_t mbsrtowcs(wchar_t *restrict ws, c
+ }
+ }
+
++ if (MB_CUR_MAX==1) {
++ if (!ws) return strlen((const char *)s);
++ for (;;) {
++ if (!wn) {
++ *src = (const void *)s;
++ return wn0;
++ }
++ if (!*s) break;
++ c = *s++;
++ *ws++ = CODEUNIT(c);
++ wn--;
++ }
++ *ws = 0;
++ *src = 0;
++ return wn0-wn;
++ }
++
+ if (!ws) for (;;) {
+ if (*s-1u < 0x7f && (uintptr_t)s%4 == 0) {
+ while (!(( *(uint32_t*)s | *(uint32_t*)s-0x01010101) & 0x80808080)) {
+--- a/src/multibyte/mbtowc.c
++++ b/src/multibyte/mbtowc.c
+@@ -4,6 +4,7 @@
+ * unnecessary.
+ */
+
++#include <stdlib.h>
+ #include <wchar.h>
+ #include <errno.h>
+ #include "internal.h"
+@@ -19,6 +20,7 @@ int mbtowc(wchar_t *restrict wc, const c
+ if (!wc) wc = &dummy;
+
+ if (*s < 0x80) return !!(*wc = *s);
++ if (MB_CUR_MAX==1) return (*wc = CODEUNIT(*s)), 1;
+ if (*s-SA > SB-SA) goto ilseq;
+ c = bittab[*s++-SA];
+
+--- a/src/multibyte/wcrtomb.c
++++ b/src/multibyte/wcrtomb.c
+@@ -4,8 +4,10 @@
+ * unnecessary.
+ */
+
++#include <stdlib.h>
+ #include <wchar.h>
+ #include <errno.h>
++#include "internal.h"
+
+ size_t wcrtomb(char *restrict s, wchar_t wc, mbstate_t *restrict st)
+ {
+@@ -13,6 +15,13 @@ size_t wcrtomb(char *restrict s, wchar_t
+ if ((unsigned)wc < 0x80) {
+ *s = wc;
+ return 1;
++ } else if (MB_CUR_MAX == 1) {
++ if (!IS_CODEUNIT(wc)) {
++ errno = EILSEQ;
++ return -1;
++ }
++ *s = wc;
++ return 1;
+ } else if ((unsigned)wc < 0x800) {
+ *s++ = 0xc0 | (wc>>6);
+ *s = 0x80 | (wc&0x3f);
+--- a/src/multibyte/wctob.c
++++ b/src/multibyte/wctob.c
+@@ -1,8 +1,10 @@
+-#include <stdio.h>
+ #include <wchar.h>
++#include <stdlib.h>
++#include "internal.h"
+
+ int wctob(wint_t c)
+ {
+ if (c < 128U) return c;
++ if (MB_CUR_MAX==1 && IS_CODEUNIT(c)) return (unsigned char)c;
+ return EOF;
+ }
+--- a/src/passwd/nscd_query.c
++++ b/src/passwd/nscd_query.c
+@@ -32,6 +32,7 @@ FILE *__nscd_query(int32_t req, const ch
+ },
+ .msg_iovlen = 2
+ };
++ int errno_save = errno;
+
+ *swap = 0;
+ retry:
+@@ -50,11 +51,14 @@ retry:
+ return f;
+
+ if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+- /* If there isn't a running nscd we return -1 to indicate that
+- * that is precisely what happened
+- */
+- if (errno == EACCES || errno == ECONNREFUSED || errno == ENOENT)
++ /* If there isn't a running nscd we simulate a "not found"
++ * result and the caller is responsible for calling
++ * fclose on the (unconnected) socket. The value of
++ * errno must be left unchanged in this case. */
++ if (errno == EACCES || errno == ECONNREFUSED || errno == ENOENT) {
++ errno = errno_save;
+ return f;
++ }
+ goto error;
+ }
+
+--- /dev/null
++++ b/src/process/sh/vfork.s
+@@ -0,0 +1,23 @@
++.global __vfork
++.weak vfork
++.type __vfork,@function
++.type vfork,@function
++__vfork:
++vfork:
++ mov #95, r3
++ add r3, r3
++
++ trapa #16
++ or r0, r0
++ or r0, r0
++ or r0, r0
++ or r0, r0
++ or r0, r0
++
++ mov r0, r4
++ mov.l 1f, r0
++2: braf r0
++ nop
++ .align 2
++ .hidden __syscall_ret
++1: .long __syscall_ret@PLT-(2b+4-.)
+--- a/src/regex/fnmatch.c
++++ b/src/regex/fnmatch.c
+@@ -18,6 +18,7 @@
+ #include <stdlib.h>
+ #include <wchar.h>
+ #include <wctype.h>
++#include "locale_impl.h"
+
+ #define END 0
+ #define UNMATCHABLE -2
+@@ -229,7 +230,7 @@ static int fnmatch_internal(const char *
+ * On illegal sequences we may get it wrong, but in that case
+ * we necessarily have a matching failure anyway. */
+ for (s=endstr; s>str && tailcnt; tailcnt--) {
+- if (s[-1] < 128U) s--;
++ if (s[-1] < 128U || MB_CUR_MAX==1) s--;
+ else while ((unsigned char)*--s-0x80U<0x40 && s>str);
+ }
+ if (tailcnt) return FNM_NOMATCH;
+--- a/src/stdio/__fdopen.c
++++ b/src/stdio/__fdopen.c
+@@ -54,13 +54,7 @@ FILE *__fdopen(int fd, const char *mode)
+ if (!libc.threaded) f->lock = -1;
+
+ /* Add new FILE to open file list */
+- OFLLOCK();
+- f->next = libc.ofl_head;
+- if (libc.ofl_head) libc.ofl_head->prev = f;
+- libc.ofl_head = f;
+- OFLUNLOCK();
+-
+- return f;
++ return __ofl_add(f);
+ }
+
+ weak_alias(__fdopen, fdopen);
+--- a/src/stdio/__stdio_exit.c
++++ b/src/stdio/__stdio_exit.c
+@@ -16,8 +16,7 @@ static void close_file(FILE *f)
+ void __stdio_exit(void)
+ {
+ FILE *f;
+- OFLLOCK();
+- for (f=libc.ofl_head; f; f=f->next) close_file(f);
++ for (f=*__ofl_lock(); f; f=f->next) close_file(f);
+ close_file(__stdin_used);
+ close_file(__stdout_used);
+ }
+--- a/src/stdio/__stdio_read.c
++++ b/src/stdio/__stdio_read.c
+@@ -1,12 +1,5 @@
+ #include "stdio_impl.h"
+ #include <sys/uio.h>
+-#include <pthread.h>
+-
+-static void cleanup(void *p)
+-{
+- FILE *f = p;
+- if (!f->lockcount) __unlockfile(f);
+-}
+
+ size_t __stdio_read(FILE *f, unsigned char *buf, size_t len)
+ {
+@@ -16,9 +9,7 @@ size_t __stdio_read(FILE *f, unsigned ch
+ };
+ ssize_t cnt;
+
+- pthread_cleanup_push(cleanup, f);
+- cnt = syscall_cp(SYS_readv, f->fd, iov, 2);
+- pthread_cleanup_pop(0);
++ cnt = syscall(SYS_readv, f->fd, iov, 2);
+ if (cnt <= 0) {
+ f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
+ return cnt;
+--- a/src/stdio/__stdio_write.c
++++ b/src/stdio/__stdio_write.c
+@@ -1,12 +1,5 @@
+ #include "stdio_impl.h"
+ #include <sys/uio.h>
+-#include <pthread.h>
+-
+-static void cleanup(void *p)
+-{
+- FILE *f = p;
+- if (!f->lockcount) __unlockfile(f);
+-}
+
+ size_t __stdio_write(FILE *f, const unsigned char *buf, size_t len)
+ {
+@@ -19,9 +12,7 @@ size_t __stdio_write(FILE *f, const unsi
+ int iovcnt = 2;
+ ssize_t cnt;
+ for (;;) {
+- pthread_cleanup_push(cleanup, f);
+- cnt = syscall_cp(SYS_writev, f->fd, iov, iovcnt);
+- pthread_cleanup_pop(0);
++ cnt = syscall(SYS_writev, f->fd, iov, iovcnt);
+ if (cnt == rem) {
+ f->wend = f->buf + f->buf_size;
+ f->wpos = f->wbase = f->buf;
+@@ -34,11 +25,8 @@ size_t __stdio_write(FILE *f, const unsi
+ }
+ rem -= cnt;
+ if (cnt > iov[0].iov_len) {
+- f->wpos = f->wbase = f->buf;
+ cnt -= iov[0].iov_len;
+ iov++; iovcnt--;
+- } else if (iovcnt == 2) {
+- f->wbase += cnt;
+ }
+ iov[0].iov_base = (char *)iov[0].iov_base + cnt;
+ iov[0].iov_len -= cnt;
+--- a/src/stdio/fclose.c
++++ b/src/stdio/fclose.c
+@@ -14,11 +14,11 @@ int fclose(FILE *f)
+ __unlist_locked_file(f);
+
+ if (!(perm = f->flags & F_PERM)) {
+- OFLLOCK();
++ FILE **head = __ofl_lock();
+ if (f->prev) f->prev->next = f->next;
+ if (f->next) f->next->prev = f->prev;
+- if (libc.ofl_head == f) libc.ofl_head = f->next;
+- OFLUNLOCK();
++ if (*head == f) *head = f->next;
++ __ofl_unlock();
+ }
+
+ r = fflush(f);
+--- a/src/stdio/fflush.c
++++ b/src/stdio/fflush.c
+@@ -35,13 +35,12 @@ int fflush(FILE *f)
+
+ r = __stdout_used ? fflush(__stdout_used) : 0;
+
+- OFLLOCK();
+- for (f=libc.ofl_head; f; f=f->next) {
++ for (f=*__ofl_lock(); f; f=f->next) {
+ FLOCK(f);
+ if (f->wpos > f->wbase) r |= __fflush_unlocked(f);
+ FUNLOCK(f);
+ }
+- OFLUNLOCK();
++ __ofl_unlock();
+
+ return r;
+ }
+--- a/src/stdio/fgetwc.c
++++ b/src/stdio/fgetwc.c
+@@ -1,8 +1,9 @@
+ #include "stdio_impl.h"
++#include "locale_impl.h"
+ #include <wchar.h>
+ #include <errno.h>
+
+-wint_t __fgetwc_unlocked(FILE *f)
++static wint_t __fgetwc_unlocked_internal(FILE *f)
+ {
+ mbstate_t st = { 0 };
+ wchar_t wc;
+@@ -10,8 +11,6 @@ wint_t __fgetwc_unlocked(FILE *f)
+ unsigned char b;
+ size_t l;
+
+- f->mode |= f->mode+1;
+-
+ /* Convert character from buffer if possible */
+ if (f->rpos < f->rend) {
+ l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
+@@ -39,6 +38,16 @@ wint_t __fgetwc_unlocked(FILE *f)
+ return wc;
+ }
+
++wint_t __fgetwc_unlocked(FILE *f)
++{
++ locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
++ if (f->mode <= 0) fwide(f, 1);
++ *ploc = f->locale;
++ wchar_t wc = __fgetwc_unlocked_internal(f);
++ *ploc = loc;
++ return wc;
++}
++
+ wint_t fgetwc(FILE *f)
+ {
+ wint_t c;
+--- a/src/stdio/fmemopen.c
++++ b/src/stdio/fmemopen.c
+@@ -110,11 +110,5 @@ FILE *fmemopen(void *restrict buf, size_
+
+ if (!libc.threaded) f->lock = -1;
+
+- OFLLOCK();
+- f->next = libc.ofl_head;
+- if (libc.ofl_head) libc.ofl_head->prev = f;
+- libc.ofl_head = f;
+- OFLUNLOCK();
+-
+- return f;
++ return __ofl_add(f);
+ }
+--- a/src/stdio/fopen.c
++++ b/src/stdio/fopen.c
+@@ -18,7 +18,7 @@ FILE *fopen(const char *restrict filenam
+ /* Compute the flags to pass to open() */
+ flags = __fmodeflags(mode);
+
+- fd = sys_open_cp(filename, flags, 0666);
++ fd = sys_open(filename, flags, 0666);
+ if (fd < 0) return 0;
+ if (flags & O_CLOEXEC)
+ __syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);
+--- a/src/stdio/fputwc.c
++++ b/src/stdio/fputwc.c
+@@ -1,4 +1,5 @@
+ #include "stdio_impl.h"
++#include "locale_impl.h"
+ #include <wchar.h>
+ #include <limits.h>
+ #include <ctype.h>
+@@ -7,8 +8,10 @@ wint_t __fputwc_unlocked(wchar_t c, FILE
+ {
+ char mbc[MB_LEN_MAX];
+ int l;
++ locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
+
+- f->mode |= f->mode+1;
++ if (f->mode <= 0) fwide(f, 1);
++ *ploc = f->locale;
+
+ if (isascii(c)) {
+ c = putc_unlocked(c, f);
+@@ -20,6 +23,8 @@ wint_t __fputwc_unlocked(wchar_t c, FILE
+ l = wctomb(mbc, c);
+ if (l < 0 || __fwritex((void *)mbc, l, f) < l) c = WEOF;
+ }
++ if (c==WEOF) f->flags |= F_ERR;
++ *ploc = loc;
+ return c;
+ }
+
+--- a/src/stdio/fputws.c
++++ b/src/stdio/fputws.c
+@@ -1,23 +1,28 @@
+ #include "stdio_impl.h"
++#include "locale_impl.h"
+ #include <wchar.h>
+
+ int fputws(const wchar_t *restrict ws, FILE *restrict f)
+ {
+ unsigned char buf[BUFSIZ];
+ size_t l=0;
++ locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
+
+ FLOCK(f);
+
+- f->mode |= f->mode+1;
++ fwide(f, 1);
++ *ploc = f->locale;
+
+ while (ws && (l = wcsrtombs((void *)buf, (void*)&ws, sizeof buf, 0))+1 > 1)
+ if (__fwritex(buf, l, f) < l) {
+ FUNLOCK(f);
++ *ploc = loc;
+ return -1;
+ }
+
+ FUNLOCK(f);
+
++ *ploc = loc;
+ return l; /* 0 or -1 */
+ }
+
+--- a/src/stdio/fwide.c
++++ b/src/stdio/fwide.c
+@@ -1,13 +1,14 @@
+-#include <wchar.h>
+ #include "stdio_impl.h"
+-
+-#define SH (8*sizeof(int)-1)
+-#define NORMALIZE(x) ((x)>>SH | -((-(x))>>SH))
++#include "locale_impl.h"
+
+ int fwide(FILE *f, int mode)
+ {
+ FLOCK(f);
+- if (!f->mode) f->mode = NORMALIZE(mode);
++ if (mode) {
++ if (!f->locale) f->locale = MB_CUR_MAX==1
++ ? C_LOCALE : UTF8_LOCALE;
++ if (!f->mode) f->mode = mode>0 ? 1 : -1;
++ }
+ mode = f->mode;
+ FUNLOCK(f);
+ return mode;
+--- /dev/null
++++ b/src/stdio/ofl.c
+@@ -0,0 +1,16 @@
++#include "stdio_impl.h"
++#include "libc.h"
++
++static FILE *ofl_head;
++static volatile int ofl_lock[2];
++
++FILE **__ofl_lock()
++{
++ LOCK(ofl_lock);
++ return &ofl_head;
++}
++
++void __ofl_unlock()
++{
++ UNLOCK(ofl_lock);
++}
+--- /dev/null
++++ b/src/stdio/ofl_add.c
+@@ -0,0 +1,11 @@
++#include "stdio_impl.h"
++
++FILE *__ofl_add(FILE *f)
++{
++ FILE **head = __ofl_lock();
++ f->next = *head;
++ if (*head) (*head)->prev = f;
++ *head = f;
++ __ofl_unlock();
++ return f;
++}
+--- a/src/stdio/open_memstream.c
++++ b/src/stdio/open_memstream.c
+@@ -79,11 +79,5 @@ FILE *open_memstream(char **bufp, size_t
+
+ if (!libc.threaded) f->lock = -1;
+
+- OFLLOCK();
+- f->next = libc.ofl_head;
+- if (libc.ofl_head) libc.ofl_head->prev = f;
+- libc.ofl_head = f;
+- OFLUNLOCK();
+-
+- return f;
++ return __ofl_add(f);
+ }
+--- a/src/stdio/open_wmemstream.c
++++ b/src/stdio/open_wmemstream.c
+@@ -81,11 +81,5 @@ FILE *open_wmemstream(wchar_t **bufp, si
+
+ if (!libc.threaded) f->lock = -1;
+
+- OFLLOCK();
+- f->next = libc.ofl_head;
+- if (libc.ofl_head) libc.ofl_head->prev = f;
+- libc.ofl_head = f;
+- OFLUNLOCK();
+-
+- return f;
++ return __ofl_add(f);
+ }
+--- a/src/stdio/ungetwc.c
++++ b/src/stdio/ungetwc.c
+@@ -1,4 +1,5 @@
+ #include "stdio_impl.h"
++#include "locale_impl.h"
+ #include <wchar.h>
+ #include <limits.h>
+ #include <ctype.h>
+@@ -8,21 +9,19 @@ wint_t ungetwc(wint_t c, FILE *f)
+ {
+ unsigned char mbc[MB_LEN_MAX];
+ int l=1;
+-
+- if (c == WEOF) return c;
+-
+- /* Try conversion early so we can fail without locking if invalid */
+- if (!isascii(c) && (l = wctomb((void *)mbc, c)) < 0)
+- return WEOF;
++ locale_t *ploc = &CURRENT_LOCALE, loc = *ploc;
+
+ FLOCK(f);
+
+- f->mode |= f->mode+1;
++ if (f->mode <= 0) fwide(f, 1);
++ *ploc = f->locale;
+
+ if (!f->rpos) __toread(f);
+- if (!f->rpos || f->rpos < f->buf - UNGET + l) {
++ if (!f->rpos || f->rpos < f->buf - UNGET + l || c == WEOF ||
++ (!isascii(c) && (l = wctomb((void *)mbc, c)) < 0)) {
+ FUNLOCK(f);
+- return EOF;
++ *ploc = loc;
++ return WEOF;
+ }
+
+ if (isascii(c)) *--f->rpos = c;
+@@ -31,5 +30,6 @@ wint_t ungetwc(wint_t c, FILE *f)
+ f->flags &= ~F_EOF;
+
+ FUNLOCK(f);
++ *ploc = loc;
+ return c;
+ }
+--- a/src/stdio/vfwprintf.c
++++ b/src/stdio/vfwprintf.c
+@@ -293,7 +293,10 @@ static int wprintf_core(FILE *f, const w
+ if ((fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, "");
+ l=w;
+ continue;
++ case 'm':
++ arg.p = strerror(errno);
+ case 's':
++ if (!arg.p) arg.p = "(null)";
+ bs = arg.p;
+ if (p<0) p = INT_MAX;
+ for (i=l=0; l<p && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);
+@@ -356,7 +359,7 @@ int vfwprintf(FILE *restrict f, const wc
+ }
+
+ FLOCK(f);
+- f->mode |= f->mode+1;
++ fwide(f, 1);
+ olderr = f->flags & F_ERR;
+ f->flags &= ~F_ERR;
+ ret = wprintf_core(f, fmt, &ap2, nl_arg, nl_type);
+--- a/src/stdio/vfwscanf.c
++++ b/src/stdio/vfwscanf.c
+@@ -104,7 +104,7 @@ int vfwscanf(FILE *restrict f, const wch
+
+ FLOCK(f);
+
+- f->mode |= f->mode+1;
++ fwide(f, 1);
+
+ for (p=fmt; *p; p++) {
+
+--- /dev/null
++++ b/src/thread/__unmapself.c
+@@ -0,0 +1,29 @@
++#include "pthread_impl.h"
++#include "atomic.h"
++#include "syscall.h"
++/* cheat and reuse CRTJMP macro from dynlink code */
++#include "dynlink.h"
++
++static volatile int lock;
++static void *unmap_base;
++static size_t unmap_size;
++static char shared_stack[256];
++
++static void do_unmap()
++{
++ __syscall(SYS_munmap, unmap_base, unmap_size);
++ __syscall(SYS_exit);
++}
++
++void __unmapself(void *base, size_t size)
++{
++ int tid=__pthread_self()->tid;
++ char *stack = shared_stack + sizeof shared_stack;
++ stack -= (uintptr_t)stack % 16;
++ while (lock || a_cas(&lock, 0, tid))
++ a_spin();
++ __syscall(SYS_set_tid_address, &lock);
++ unmap_base = base;
++ unmap_size = size;
++ CRTJMP(do_unmap, stack);
++}
+--- a/src/thread/pthread_create.c
++++ b/src/thread/pthread_create.c
+@@ -191,8 +191,9 @@ int __pthread_create(pthread_t *restrict
+ if (!libc.can_do_threads) return ENOSYS;
+ self = __pthread_self();
+ if (!libc.threaded) {
+- for (FILE *f=libc.ofl_head; f; f=f->next)
++ for (FILE *f=*__ofl_lock(); f; f=f->next)
+ init_file_lock(f);
++ __ofl_unlock();
+ init_file_lock(__stdin_used);
+ init_file_lock(__stdout_used);
+ init_file_lock(__stderr_used);
projects / openwrt / openwrt.git / commitdiff