/* Copyright (C) 2005 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 <sys/syscall.h> #include <bits/arm_asm.h> #include <bits/arm_bx.h> /* In the EABI syscall interface, we don't need a special syscall to implement syscall(). It won't work reliably with 64-bit arguments (but that is true on many modern platforms). */ .text .global syscall .type syscall,%function .align 4 #if defined(THUMB1_ONLY) .thumb_func syscall: push {r4, r5, r6, r7} mov ip, r0 mov r0, r1 mov r1, r2 mov r2, r3 add r7, sp, #(4 * 4) ldmia r7!, {r3, r4, r5, r6} mov r7, ip swi 0x0 pop {r4, r5, r6, r7} ldr r1, =0xfffff000 cmp r0, r1 bcs 1f bx lr 1: push {r3, lr} bl __syscall_error POP_RET .pool #else syscall: mov ip, sp stmfd sp!, {r4, r5, r6, r7} mov r7, r0 mov r0, r1 mov r1, r2 mov r2, r3 ldmfd ip, {r3, r4, r5, r6} swi 0x0 ldmfd sp!, {r4, r5, r6, r7} cmn r0, #4096 IT(t, cc) #if defined(__USE_BX__) bxcc lr #else movcc pc, lr #endif b __syscall_error #endif .size syscall,.-syscall