arm64: add PTRACE_SYSEMU{,SINGLESTEP} definations to uapi headers

x86 and um use 31 and 32 for PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP
while powerpc uses different value maybe for legacy reasons.

Though handling of PTRACE_SYSEMU can be made architecture independent,
it's hard to make these definations generic. To add to this existing
mess few architectures like arm, c6x and sh use 31 for PTRACE_GETFDPIC
(get the ELF fdpic loadmap address). It's not possible to move the
definations to generic headers.

So we unfortunately have to duplicate the same defination to ARM64 if
we need to support PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP.

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h
index d78623acb6491e6ef4ae64a365c22e29bd5cefe2..627ac57c1581eda41b52695525fa9170ac099b3f 100644 (file)
--- a/arch/arm64/include/uapi/asm/ptrace.h
+++ b/arch/arm64/include/uapi/asm/ptrace.h
@@ -62,6 +62,9 @@
 #define PSR_x          0x0000ff00      /* Extension            */
 #define PSR_c          0x000000ff      /* Control              */
 
+/* syscall emulation path in ptrace */
+#define PTRACE_SYSEMU            31
+#define PTRACE_SYSEMU_SINGLESTEP  32
 
 #ifndef __ASSEMBLY__