diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/clone.S')
| -rw-r--r-- | libc/sysdeps/linux/i386/clone.S | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/clone.S b/libc/sysdeps/linux/i386/clone.S index a7de3fe27..cf6cd35ec 100644 --- a/libc/sysdeps/linux/i386/clone.S +++ b/libc/sysdeps/linux/i386/clone.S @@ -25,6 +25,7 @@ #define _ERRNO_H 1 #include <bits/errno.h> +#include <sysdep.h> #include <sys/syscall.h> /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, @@ -45,6 +46,7 @@ .global clone .type clone,%function clone: + cfi_startproc; /* Sanity check arguments. */ movl $-EINVAL,%eax @@ -86,17 +88,28 @@ clone: /* Do the system call */ pushl %ebx + cfi_adjust_cfa_offset (4) pushl %esi + cfi_adjust_cfa_offset (4) pushl %edi + cfi_adjust_cfa_offset (4) + movl TLS+12(%esp),%esi + cfi_rel_offset (esi, 4) movl PTID+12(%esp),%edx movl FLAGS+12(%esp),%ebx + cfi_rel_offset (ebx, 8) movl CTID+12(%esp),%edi + cfi_rel_offset (edi, 0) movl $__NR_clone,%eax #ifdef RESET_PID /* Remember the flag value. */ movl %ebx, (%ecx) #endif + /* End FDE now, because in the child the unwind info will be + wrong. */ + cfi_endproc + int $0x80 popl %edi popl %esi @@ -108,6 +121,9 @@ clone: ret .Lthread_start: + cfi_startproc; + /* Clearing frame pointer is insufficient, use CFI. */ + cfi_undefined (eip); /* Note: %esi is zero. */ movl %esi,%ebp /* terminate the stack frame */ call *%ebx @@ -120,6 +136,7 @@ clone: movl %eax, %ebx movl $__NR_exit, %eax int $0x80 + cfi_endproc; /* Need to indirect jump to syscall error * or we end up with TEXTREL's |