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author | Tianon Gravi <admwiggin@gmail.com> | 2015-01-15 12:50:40 -0700 |
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committer | Tianon Gravi <admwiggin@gmail.com> | 2015-01-15 12:50:40 -0700 |
commit | 2a0db60599fdd75b1bc3e297180fbe1282763759 (patch) | |
tree | 68d43c3e30d9ab961ddf6b7365201ca6b675b253 /src/runtime/cgo/gcc_arm.S | |
parent | ef33cba3c8de6c431df56503df51fcd3a473c89e (diff) | |
parent | f154da9e12608589e8d5f0508f908a0c3e88a1bb (diff) | |
download | golang-2a0db60599fdd75b1bc3e297180fbe1282763759.tar.gz |
Merge tag 'upstream/1.4' into debian-experimental
* tag 'upstream/1.4':
Imported Upstream version 1.4
Diffstat (limited to 'src/runtime/cgo/gcc_arm.S')
-rw-r--r-- | src/runtime/cgo/gcc_arm.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/runtime/cgo/gcc_arm.S b/src/runtime/cgo/gcc_arm.S new file mode 100644 index 000000000..d5833bfad --- /dev/null +++ b/src/runtime/cgo/gcc_arm.S @@ -0,0 +1,42 @@ +// 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 + +/* + * void crosscall_arm1(void (*fn)(void), void (*setg_gcc)(void *g), 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_arm1) +EXT(crosscall_arm1): + push {r4, r5, r6, r7, r8, r9, r10, r11, ip, lr} + mov r4, r0 + mov r5, r1 + mov r0, r2 + + // Because the assembler might target an earlier revision of the ISA + // by default, we encode BLX as a .word. + .word 0xe12fff35 // blx r5 // setg(g) + .word 0xe12fff34 // 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 |