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Fix calling convention for Win64 MiniFFI calls

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This commit is contained in:
Roza 2021-01-01 02:02:47 -05:00
parent ec9094e1fb
commit f72330a23f
1 changed files with 18 additions and 23 deletions
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41
binding/miniffi.cpp
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@ -17,7 +17,6 @@ mffi_value miniffi_call_intern(MINIFFI_FUNC target, MiniFFIFuncArgs *p, int npar
asm volatile(INTEL_ASM
"MiniFFI_call_asm:\n"
"mov [edi], esp\n"
"test ebx, ebx\n"
"jz mffi_call_void\n"
@ -56,38 +55,34 @@ mffi_value miniffi_call_intern(MINIFFI_FUNC target, MiniFFIFuncArgs *p, int npar
#else
mffi_value miniffi_call_intern(MINIFFI_FUNC target, MiniFFIFuncArgs *p, int nparams) {
mffi_value ret;
void *old_rsp = 0;
asm volatile(INTEL_ASM
"MiniFFI_call_asm:\n"
"mov [rdi], rsp\n"
"test rbx, rbx\n"
"test rax, rax\n"
"jz mffi_call_void\n"
"shl rbx, 2\n"
"mov rcx, rbx\n"
"shl rax, 3\n"
"cmp rax, 32\n"
"jle mffi_call_low\n"
"mffi_call_loop:\n"
"sub rcx, 4\n"
"mov rbx, [rsi+rcx]\n"
"sub rax, 8\n"
"mov rbx, [rsi+rax]\n"
"push rbx\n"
"test rcx, rcx\n"
"jnz mffi_call_loop\n"
"cmp rax, 32\n"
"jne mffi_call_loop\n"
"mffi_call_low:\n"
"mov rcx, [rsi]\n"
"mov rdx, [rsi+8]\n"
"mov r8, [rsi+16]\n"
"mov r9, [rsi+24]\n"
"mffi_call_void:\n"
"call rdx\n"
"call rdi\n"
: "=a"(ret)
: "b"(nparams), "S"(p), "d"(target), "D"(&old_rsp)
: "rcx"
);
asm volatile(INTEL_ASM
"mov rdx, [rdi]\n"
"cmp rdx, rsp\n"
"cmovne rsp, rdx"
:
: "D"(&old_rsp)
: "rdx"
: "a"(nparams), "S"(p), "D"(target)
: "r8", "r9", "rbx", "rcx", "rdx"
);
return ret;
}