// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
* Apple still insists on underscore prefixes for C function names.
*/
#if defined(__APPLE__)
#define EXT(s) _##s
#else
#define EXT(s) s
#endif
/*
* Because the assembler might target an earlier revision of the ISA
* by default, we must explicitly specify the ISA revision to ensure
* BLX is recognized as a valid instruction.
*/
.arch armv5t
/*
* void crosscall_arm2(void (*fn)(void), void (*setmg_gcc)(void *m, void *g), void *m, void *g)
*
* Calling into the 5c tool chain, where all registers are caller save.
* Called from standard ARM EABI, where r4-r11 are callee-save, so they
* must be saved explicitly.
*/
.globl EXT(crosscall_arm2)
EXT(crosscall_arm2):
push {r4, r5, r6, r7, r8, r9, r10, r11, ip, lr}
mov r4, r0
mov r5, r1
mov r0, r2
mov r1, r3
blx r5 // setmg(m, g)
blx r4 // fn()
pop {r4, r5, r6, r7, r8, r9, r10, r11, ip, pc}
.globl EXT(__stack_chk_fail_local)
EXT(__stack_chk_fail_local):
1:
b 1b
#ifdef __ELF__
.section .note.GNU-stack,"",%progbits
#endif