1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
// 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.
.file "gcc_arm.S"
/*
* 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 crosscall_arm1
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}
#ifdef __ELF__
.section .note.GNU-stack,"",%progbits
#endif
|
