And add proper CFI annotation to it which was previously
impossible. This prevents "stuck" messages by the dwarf2 unwinder
when reaching the top of a kernel stack.
Includes feedback from Jan Beulich
Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
ENDPROC(arch_unwind_init_running)
#endif
+ENTRY(kernel_thread_helper)
+ pushl $0 # fake return address for unwinder
+ CFI_STARTPROC
+ movl %edx,%eax
+ push %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ call *%ebx
+ push %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ call do_exit
+ CFI_ENDPROC
+ENDPROC(kernel_thread_helper)
+
.section .rodata,"a"
#include "syscall_table.S"
* the "args".
*/
extern void kernel_thread_helper(void);
-__asm__(".section .text\n"
- ".align 4\n"
- "kernel_thread_helper:\n\t"
- "movl %edx,%eax\n\t"
- "pushl %edx\n\t"
- "call *%ebx\n\t"
- "pushl %eax\n\t"
- "call do_exit\n"
- ".previous");
/*
* Create a kernel thread