| /* Copyright (C) 2010-2018 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/>. */ |
| |
| /* When this file is built for inclusion in nscd, _FORTIFY_SOURCE is |
| defined but -O is not used, resulting in a warning from features.h. */ |
| #undef _FORTIFY_SOURCE |
| #include <sysdep.h> |
| |
| /* Out-of-line syscall stub. We expect the system call number in ip |
| and return the raw result in r0. No registers are clobbered. |
| We could avoid using the stack for this, but the goal is accurate |
| unwind information - and while there is a reserved prefix in the |
| ARM unwind tables for register to register moves, the actual opcodes |
| are not defined. */ |
| |
| #if defined(__thumb__) |
| .thumb |
| .syntax unified |
| .hidden __libc_do_syscall |
| |
| #undef CALL_MCOUNT |
| #define CALL_MCOUNT |
| |
| ENTRY (__libc_do_syscall) |
| .fnstart |
| push {r7, lr} |
| .save {r7, lr} |
| cfi_adjust_cfa_offset (8) |
| cfi_rel_offset (r7, 0) |
| cfi_rel_offset (lr, 4) |
| mov r7, ip |
| swi 0x0 |
| pop {r7, pc} |
| .fnend |
| END (__libc_do_syscall) |
| |
| #endif /* __thumb__ */ |
