diff options
Diffstat (limited to 'sysdeps/unix/x86_64/sysdep.S')
| -rw-r--r-- | sysdeps/unix/x86_64/sysdep.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/unix/x86_64/sysdep.S b/sysdeps/unix/x86_64/sysdep.S new file mode 100644 index 0000000000..b26b1db934 --- /dev/null +++ b/sysdeps/unix/x86_64/sysdep.S @@ -0,0 +1,71 @@ +/* Copyright (C) 2001 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#define _ERRNO_H +#include <bits/errno.h> +#include <bp-asm.h> +#include <bp-sym.h> + +.globl C_SYMBOL_NAME(errno) +.globl syscall_error + +#undef syscall_error +#ifdef NO_UNDERSCORES +__syscall_error: +#else +syscall_error: +#endif +#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN + /* We translate the system's EWOULDBLOCK error into EAGAIN. + The GNU C library always defines EWOULDBLOCK==EAGAIN. + EWOULDBLOCK_sys is the original number. */ + cmpq $EWOULDBLOCK_sys, %rax /* Is it the old EWOULDBLOCK? */ + jne notb /* Branch if not. */ + movq $EAGAIN, %rax /* Yes; translate it to EAGAIN. */ +notb: +#endif +#ifndef PIC +# ifndef _LIBC_REENTRANT + movq %rax, C_SYMBOL_NAME(errno) +# else + pushq %rax + PUSH_ERRNO_LOCATION_RETURN + call BP_SYM (__errno_location) + POP_ERRNO_LOCATION_RETURN + popq %rcx + movq %rcx, (%rax) +# endif +#else +# ifndef _LIBC_REENTRANT + movq C_SYMBOL_NAME(errno)@GOTPCREL(%rip), %rcx + movq %rax, (%rcx) +# else + pushq %rax + PUSH_ERRNO_LOCATION_RETURN + call C_SYMBOL_NAME (BP_SYM (__errno_location)@PLT) + POP_ERRNO_LOCATION_RETURN + popq %rcx + movq %rcx, (%rax) +# endif +#endif + movq $-1, %rax + ret + +#undef __syscall_error +END (__syscall_error) |