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vrclient: Fix x64 thunks for C API.

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* Clean up the stack properly.
* Do not push parameters after shadow register space.
This commit is contained in:
Józef Kucia 2018-07-26 17:02:25 +02:00 • committed by Andrew Eikum
parent 5c4e0ab079
commit 23ffdc5ec8
20 changed files with 2438 additions and 2382 deletions
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39
vrclient_x64/vrclient_main.c
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@ -919,13 +919,44 @@ __ASM_GLOBAL_FUNC(call_flat_method,
"pushl %eax\n\t"
"jmp *%edx");
#else
__ASM_GLOBAL_FUNC(call_flat_method,
"popq %rax\n\t" // return address
"pushq %r9\n\t"
"pushq %rax\n\t"
// handles "this" and up to 3 parameters
__ASM_GLOBAL_FUNC(call_flat_method3,
"movq %r8, %r9\n\t" // shift over arguments
"movq %rdx, %r8\n\t"
"movq %rcx, %rdx\n\t"
"movq %r10, %rcx\n\t" // add This pointer
"jmp *%r11");
__ASM_GLOBAL_FUNC(call_flat_method4,
"subq $0x28, %rsp\n\t" // shadow register space and 1 parameter
"movq %r9, 0x20(%rsp)\n\t"
"movq %r8, %r9\n\t" // shift over arguments
"movq %rdx, %r8\n\t"
"movq %rcx, %rdx\n\t"
"movq %r10, %rcx\n\t" // add This pointer
"call *%r11\n\t"
"addq $0x28, %rsp\n\t"
"ret");
// handles "this" and up to 9 parameters
__ASM_GLOBAL_FUNC(call_flat_method9,
"subq $0x58, %rsp\n\t" // shadow register space and 6 parameters
"movq %r9, 0x20(%rsp)\n\t"
"movq 0x80(%rsp), %rax\n\t" // copy parameters
"movq %rax, 0x28(%rsp)\n\t"
"movq 0x88(%rsp), %rax\n\t"
"movq %rax, 0x30(%rsp)\n\t"
"movq 0x90(%rsp), %rax\n\t"
"movq %rax, 0x38(%rsp)\n\t"
"movq 0x98(%rsp), %rax\n\t"
"movq %rax, 0x40(%rsp)\n\t"
"movq 0xa0(%rsp), %rax\n\t"
"movq %rax, 0x48(%rsp)\n\t"
"movq %r8, %r9\n\t" // shift over arguments
"movq %rdx, %r8\n\t"
"movq %rcx, %rdx\n\t"
"movq %r10, %rcx\n\t" // add This pointer
"call *%r11\n\t"
"addq $0x58, %rsp\n\t"
"ret");
#endif