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Fix #11, Support OSX for Apple Darwin, macOS
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@@ -2,3 +2,4 @@ DARWIN_*_DBG | |
LINUX_*_DBG | ||
obj | ||
st.pc | ||
.idea |
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/* If user disable the ASM, such as avoiding bugs in ASM, donot compile it. */ | ||
#if !defined(MD_ST_NO_ASM) | ||
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#if defined(__amd64__) || defined(__x86_64__) | ||
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/****************************************************************/ | ||
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/* | ||
* Internal __jmp_buf layout | ||
*/ | ||
#define JB_RBX 0 | ||
#define JB_RBP 1 | ||
#define JB_R12 2 /* Backup IP, https://www.cnblogs.com/Five100Miles/p/8458561.html */ | ||
#define JB_R13 3 /* Backup SP, https://www.cnblogs.com/Five100Miles/p/8458561.html */ | ||
#define JB_R14 4 /* Backup LR, https://www.cnblogs.com/Five100Miles/p/8458561.html */ | ||
#define JB_R15 5 /* Backup PC, https://www.cnblogs.com/Five100Miles/p/8458561.html */ | ||
#define JB_RSP 6 | ||
#define JB_PC 7 | ||
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.file "md_darwin.S" | ||
.text | ||
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/* _st_md_cxt_save(__jmp_buf env) */ /* The env is rdi, http://blog.chinaunix.net/uid-20157960-id-1974354.html */ | ||
.globl __st_md_cxt_save | ||
.align 16 | ||
__st_md_cxt_save: | ||
/* | ||
* Save registers. | ||
*/ | ||
movq %rbx, (JB_RBX*8)(%rdi) /* Save rbx to env[0], *(int64_t*)(rdi+0)=rbx */ | ||
movq %rbp, (JB_RBP*8)(%rdi) /* Save rbp to env[1], *(int64_t*)(rdi+1)=rbp */ | ||
movq %r12, (JB_R12*8)(%rdi) /* Save r12 to env[2], *(int64_t*)(rdi+2)=r12 */ | ||
movq %r13, (JB_R13*8)(%rdi) /* Save r13 to env[3], *(int64_t*)(rdi+3)=r13 */ | ||
movq %r14, (JB_R14*8)(%rdi) /* Save r14 to env[4], *(int64_t*)(rdi+4)=r14 */ | ||
movq %r15, (JB_R15*8)(%rdi) /* Save r15 to env[5], *(int64_t*)(rdi+5)=r15 */ | ||
/* Save SP */ | ||
leaq 8(%rsp), %rdx /* Save *(int64_t*)(rsp+8) to rdx, https://my.oschina.net/guonaihong/blog/508907 */ | ||
movq %rdx, (JB_RSP*8)(%rdi) /* Save rdx(rsp) to env[6], *(int64_t*)(rdi+6)=rdx */ | ||
/* Save PC we are returning to */ | ||
movq (%rsp), %rax /* Save PC(parent function address) %(rsp) to rax */ | ||
movq %rax, (JB_PC*8)(%rdi) /* Save rax(PC) to env[7], *(int64_t*)(rdi+7)=rax */ | ||
xorq %rax, %rax /* Reset rax to 0 */ | ||
ret | ||
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/****************************************************************/ | ||
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/* _st_md_cxt_restore(__jmp_buf env, int val) */ /* The env is rdi, val is esi/rsi, http://blog.chinaunix.net/uid-20157960-id-1974354.html */ | ||
.globl __st_md_cxt_restore | ||
.align 16 | ||
__st_md_cxt_restore: | ||
/* | ||
* Restore registers. | ||
*/ | ||
movq (JB_RBX*8)(%rdi), %rbx /* Load rbx from env[0] */ | ||
movq (JB_RBP*8)(%rdi), %rbp /* Load rbp from env[1] */ | ||
movq (JB_R12*8)(%rdi), %r12 /* Load r12 from env[2] */ | ||
movq (JB_R13*8)(%rdi), %r13 /* Load r13 from env[3] */ | ||
movq (JB_R14*8)(%rdi), %r14 /* Load r14 from env[4] */ | ||
movq (JB_R15*8)(%rdi), %r15 /* Load r15 from env[5] */ | ||
/* Set return value */ /* The esi is param1 val, the eax is return value */ | ||
test %esi, %esi /* if (!val) { */ | ||
mov $01, %eax /* val=1; */ | ||
cmove %eax, %esi /* } */ | ||
mov %esi, %eax /* return val; */ | ||
movq (JB_PC*8)(%rdi), %rdx /* Load rdx(PC) from env[7] */ | ||
movq (JB_RSP*8)(%rdi), %rsp /* Load rsp from env[6] */ | ||
/* Jump to saved PC */ | ||
jmpq *%rdx /* Jump to rdx(PC) */ | ||
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/****************************************************************/ | ||
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#endif | ||
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#endif |
91d530e
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#11 (comment)