| // Copyright 2015 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 |
| |
| // Apple's ld64 wants 4-byte alignment for ARM code sections. |
| // .align in both Apple as and GNU as treat n as aligning to 2**n bytes. |
| .align 2 |
| |
| /* |
| * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g) |
| * |
| * Calling into the gc tool chain, where all registers are caller save. |
| * Called from standard ARM EABI, where x19-x29 are callee-save, so they |
| * must be saved explicitly, along with x30 (LR). |
| */ |
| .globl EXT(crosscall1) |
| EXT(crosscall1): |
| stp x19, x20, [sp, #-16]! |
| stp x21, x22, [sp, #-16]! |
| stp x23, x24, [sp, #-16]! |
| stp x25, x26, [sp, #-16]! |
| stp x27, x28, [sp, #-16]! |
| stp x29, x30, [sp, #-16]! |
| mov x29, sp |
| |
| mov x19, x0 |
| mov x20, x1 |
| mov x0, x2 |
| |
| blr x20 |
| blr x19 |
| |
| ldp x29, x30, [sp], #16 |
| ldp x27, x28, [sp], #16 |
| ldp x25, x26, [sp], #16 |
| ldp x23, x24, [sp], #16 |
| ldp x21, x22, [sp], #16 |
| ldp x19, x20, [sp], #16 |
| ret |
| |
| |
| #ifdef __ELF__ |
| .section .note.GNU-stack,"",%progbits |
| #endif |
