| /* Out-of-line syscall stub for six-argument syscalls from C. |
| Copyright (C) 2015-2018 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| |
| #ifndef OPTIMIZE_FOR_GCC_5 |
| |
| /* %eax, %ecx, %edx and %esi contain the values expected by the kernel. |
| %edi points to a structure with the values of %ebx, %edi and %ebp. */ |
| |
| .hidden __libc_do_syscall |
| |
| ENTRY (__libc_do_syscall) |
| pushl %ebx |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (ebx, 0) |
| pushl %edi |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (edi, 0) |
| pushl %ebp |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (ebp, 0) |
| movl 0(%edi), %ebx |
| movl 8(%edi), %ebp |
| movl 4(%edi), %edi |
| ENTER_KERNEL |
| popl %ebp |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (ebp) |
| popl %edi |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (edi) |
| popl %ebx |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (ebx) |
| ret |
| END (__libc_do_syscall) |
| #endif |
