Boost:: arm64的上下文

boost::context for arm64?

本文关键字：上下文 arm64 Boost      更新时间：2023-10-16

我正在尝试为iOS(armv7, armv7s, arm64)编译boost::context:

jump_arm_aapcs_macho_gas.S:52:18: error: ',' expected
    stmia a1, {v1-v8,sp-lr} @ save V1-V8,SP-LR
                 ^
jump_arm_aapcs_macho_gas.S:53:14: error: register expected
    str lr, [a1,#40] @ save LR as PC
             ^
jump_arm_aapcs_macho_gas.S:69:18: error: invalid variant 'use'
    mov a1, a3 @ use third arg as return value after jump
                 ^
jump_arm_aapcs_macho_gas.S:70:39: error: unexpected token at start of statement
                                    @ and as first arg in context function
                                      ^
jump_arm_aapcs_macho_gas.S:71:18: error: ',' expected
    ldmia a2, {v1-v8,sp-pc} @ restore v1-V8,SP-PC
                 ^

jump_arm_aapcs_macho_gas。S 

.text
.globl _jump_fcontext
.align 2
_jump_fcontext:
    stmia   a1, {v1-v8,sp-lr}       @ save V1-V8,SP-LR
    str     lr, [a1,#40]            @ save LR as PC
#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
    cmp     a4, #0                  @ test if fpu env should be preserved
    beq     1f
    mov     a4, a1
    add     a4, #52
    vstmia  a4, {d8-d15}            @ save S16-S31
    mov     a4, a2
    add     a4, #52
    vldmia  a4, {d8-d15}            @ restore S16-S31
1:
#endif
    mov     a1, a3                  @ use third arg as return value after jump
                                    @ and as first arg in context function
    ldmia   a2, {v1-v8,sp-pc}       @ restore v1-V8,SP-PC

如果我删除arm64，并将体系结构设置为armv7，它会编译，所以代码应该没问题。

是否有办法让这个编译为arm64?

ARM64 (AArch64)与ARM32 (A32)在指令和寄存器集上都有很大的不同。调用约定(ABI)也不同。您需要重写汇编程序片段。我建议你联系开发人员，因为你似乎不熟悉底层的细节，自己做。

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