diff options
| author | Andreas Jaeger <aj@suse.de> | 2002-04-22 05:58:12 +0000 |
|---|---|---|
| committer | Andreas Jaeger <aj@suse.de> | 2002-04-22 05:58:12 +0000 |
| commit | 04d12383c83e8cba07b96289d313ebad7d0c6ea7 (patch) | |
| tree | 6631a4dbea12e384ae342cf079233ab76684f6c4 /sysdeps | |
| parent | 47cbdebd7eb699759a7fc2c13cf226bc82cd23ac (diff) | |
Use %rdi as temp register instead of destroying %rbx.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/vfork.S | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/vfork.S b/sysdeps/unix/sysv/linux/x86_64/vfork.S index 0b5a90a6c8..79f3260efc 100644 --- a/sysdeps/unix/sysv/linux/x86_64/vfork.S +++ b/sysdeps/unix/sysv/linux/x86_64/vfork.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2001 Free Software Foundation, Inc. +/* Copyright (C) 2001, 2002 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 @@ -27,8 +27,9 @@ ENTRY (__vfork) - /* Pop the return PC value into RBX. */ - popq %rbx + /* Pop the return PC value into RDI. We need a register that + is preserved by the syscall and that we're allowed to destroy. */ + popq %rdi /* Stuff the syscall number in RAX and enter into the kernel. */ movl $SYS_ify (vfork), %eax @@ -37,11 +38,11 @@ ENTRY (__vfork) jae .Lerror /* Branch forward if it failed. */ /* Jump to the return PC. */ - jmp *%rbx + jmp *%rdi .Lerror: /* Push back the return PC. */ - pushq %rbx + pushq %rdi jmp SYSCALL_ERROR_LABEL .Lpseudo_end: |