diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/mmap.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/mmap.S | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/mmap.S b/sysdeps/unix/sysv/linux/i386/mmap.S index ebb21f3d32..a1481feeb5 100644 --- a/sysdeps/unix/sysv/linux/i386/mmap.S +++ b/sysdeps/unix/sysv/linux/i386/mmap.S @@ -1,4 +1,5 @@ -/* Copyright (C) 1995,96,97,98,99,2000,2002 Free Software Foundation, Inc. +/* Copyright (C) 1995,96,97,98,99,2000,2002,2005,2006 + Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -18,7 +19,7 @@ #include <sysdep.h> -#include "kernel-features.h" +#include <kernel-features.h> #define EINVAL 22 @@ -26,22 +27,30 @@ ENTRY (__mmap) -/* I don't think it is worthwhile trzing to use mmap2 whenever it +/* I don't think it is worthwhile trying to use mmap2 whenever it is available. Only use it when we are sure the syscall exists. */ #ifdef __ASSUME_MMAP2_SYSCALL /* Save registers. */ pushl %ebp + cfi_adjust_cfa_offset (4) pushl %ebx + cfi_adjust_cfa_offset (4) pushl %esi + cfi_adjust_cfa_offset (4) pushl %edi + cfi_adjust_cfa_offset (4) movl 20(%esp), %ebx + cfi_rel_offset (ebx, 8) movl 24(%esp), %ecx movl 28(%esp), %edx movl 32(%esp), %esi + cfi_rel_offset (esi, 4) movl 36(%esp), %edi + cfi_rel_offset (edi, 0) movl 40(%esp), %ebp + cfi_rel_offset (ebp, 12) testl $0xfff, %ebp movl $-EINVAL, %eax jne L(skip) @@ -54,14 +63,23 @@ ENTRY (__mmap) L(skip): /* Restore registers. */ popl %edi + cfi_adjust_cfa_offset (-4) + cfi_restore (edi) popl %esi + cfi_adjust_cfa_offset (-4) + cfi_restore (esi) popl %ebx + cfi_adjust_cfa_offset (-4) + cfi_restore (ebx) popl %ebp + cfi_adjust_cfa_offset (-4) + cfi_restore (ebp) #else /* Save registers. */ movl %ebx, %edx + cfi_register (ebx, edx) movl $SYS_ify(mmap), %eax /* System call number in %eax. */ @@ -72,6 +90,7 @@ L(skip): /* Restore registers. */ movl %edx, %ebx + cfi_restore (ebx) #endif |