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Diffstat (limited to 'src/runtime/cgo/gcc_386.S')
| -rw-r--r-- | src/runtime/cgo/gcc_386.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/runtime/cgo/gcc_386.S b/src/runtime/cgo/gcc_386.S new file mode 100644 index 0000000..ff55b2c --- /dev/null +++ b/src/runtime/cgo/gcc_386.S @@ -0,0 +1,40 @@ +// Copyright 2009 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__) || defined(_WIN32) +#define EXT(s) _##s +#else +#define EXT(s) s +#endif + +/* + * void crosscall_386(void (*fn)(void)) + * + * Calling into the 8c tool chain, where all registers are caller save. + * Called from standard x86 ABI, where %ebp, %ebx, %esi, + * and %edi are callee-save, so they must be saved explicitly. + */ +.globl EXT(crosscall_386) +EXT(crosscall_386): + pushl %ebp + movl %esp, %ebp + pushl %ebx + pushl %esi + pushl %edi + + movl 8(%ebp), %eax /* fn */ + call *%eax + + popl %edi + popl %esi + popl %ebx + popl %ebp + ret + +#ifdef __ELF__ +.section .note.GNU-stack,"",@progbits +#endif |