diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/posix_fadvise64.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/posix_fadvise64.S | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/posix_fadvise64.S b/sysdeps/unix/sysv/linux/i386/posix_fadvise64.S new file mode 100644 index 0000000..8d7219f --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/posix_fadvise64.S @@ -0,0 +1,132 @@ +/* Copyright (C) 1995,96,97,98,99,2000,2002,2003 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> +#include <bp-sym.h> +#include <bp-asm.h> + +#include "kernel-features.h" + +#define EINVAL 22 +#define ENOSYS 38 +#define EOVERFLOW 75 + +#define SVRSP 16 /* saved register space */ +#define PARMS LINKAGE+SVRSP /* space for 4 saved regs */ +#define FD PARMS +#define OFFLO FD+4 +#define OFFHI OFFLO+4 +#define LENLO OFFHI+4 +#define LENHI LENLO+4 +#define FLAGS LENHI+4 + + .text +ENTRY (BP_SYM (__posix_fadvise64_l64)) + +#ifdef __NR_fadvise64_64 + + /* Save registers. */ + pushl %ebp + pushl %ebx + pushl %esi + pushl %edi + + movl FD(%esp), %ebx + movl OFFLO(%esp), %ecx + movl OFFHI(%esp), %edx + movl LENLO(%esp), %esi + movl LENHI(%esp), %edi + movl FLAGS(%esp), %ebp + + movl $SYS_ify(fadvise64_64), %eax + ENTER_KERNEL + + /* Restore registers. */ + popl %edi + popl %esi + popl %ebx + popl %ebp + +#ifndef __ASSUME_FADVISE64_64_SYSCALL + cmpl $-ENOSYS, %eax + je 1f +#endif + + /* The function returns zero, or the error number. So all we + have to do is negate the value passed back from the kernel. */ + /* If 0 > %eax > -4096 there was an error. */ + negl %eax + + /* Successful; return the syscall's value. */ + ret +#endif + +#if defined __NR_fadvise64 \ + && (!defined __ASSUME_FADVISE64_64_SYSCALL || !defined __NR_fadvise64_64) +1: /* Save registers. */ + pushl %ebx + pushl %esi + pushl %edi + + /* Overflow check. */ + cmpl $0, LENHI(%esp) + jne L(overflow) + + movl FD(%esp), %ebx + movl OFFLO(%esp), %ecx + movl OFFHI(%esp), %edx + movl LENLO(%esp), %esi + movl FLAGS(%esp), %edi + + movl $SYS_ify(fadvise64), %eax + ENTER_KERNEL + + /* Restore registers. */ + popl %edi + popl %esi + popl %ebx + + /* If 0 > %eax > -4096 there was an error. */ + negl %eax + + /* Successful; return the syscall's value. */ + ret + +L(overflow): + movl $EOVERFLOW, %eax + ret +#elif + movl $ENOSYS, %eax + ret +#endif + +END (BP_SYM (__posix_fadvise64_l64)) + +#ifdef __NR_fadvise64 +PSEUDO_ERRVAL (__posix_fadvise64_l32, posix_fadvise64, 5) + ret +PSEUDO_END_ERRVAL (__posix_fadvise64_l32) +#else +ENTRY (BP_SYM (__posix_fadvise64_l32)) + movl $ENOSYS, %eax + ret +END (BP_SYM (__posix_fadvise64_l32)) +#endif + +default_symbol_version (__posix_fadvise64_l64, posix_fadvise64, GLIBC_2.3.3) +symbol_version (__posix_fadvise64_l32, posix_fadvise64, GLIBC_2.2) |