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3fc5bbe429
* MiniFFI: Use MINIFFI_MAX_ARGS instead of literal * MiniFFI: Document lines that need changing if MINIFFI_MAX_ARGS changes * Bump MINIFFI_MAX_ARGS to 12 Fixes https://github.com/mkxp-z/mkxp-z/issues/2 * Bump MINIFFI_MAX_ARGS to 16
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
#include "miniffi.h"
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#include <assert.h>
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#if defined(__MINGW64__) || defined(__linux__) || defined(__APPLE__)
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mffi_value miniffi_call_intern(MINIFFI_FUNC target, MiniFFIFuncArgs *p, int nparams) {
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assert(nparams <= MINIFFI_MAX_ARGS);
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// Be sure to add more args to the below line if MINIFFI_MAX_ARGS is bumped
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// in the future.
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return target(p->params[0], p->params[1], p->params[2], p->params[3],
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p->params[4], p->params[5], p->params[6],
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p->params[7], p->params[8], p->params[9],
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p->params[10], p->params[11], p->params[12],
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p->params[13], p->params[14], p->params[15]);
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}
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#else // 32-bit Windows
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#define INTEL_ASM ".intel_syntax noprefix\n"
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__attribute__((noinline))
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mffi_value miniffi_call_intern(MINIFFI_FUNC target, MiniFFIFuncArgs *p, int nparams) {
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mffi_value ret;
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void *old_esp = 0;
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asm volatile(INTEL_ASM
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"mov [edi], esp\n"
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"test ebx, ebx\n"
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"jz mffi_call_void\n"
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"shl ebx, 2\n"
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"mov ecx, ebx\n"
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"mffi_call_loop:\n"
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"sub ecx, 4\n"
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"mov ebx, [esi+ecx]\n"
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"push ebx\n"
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"test ecx, ecx\n"
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"jnz mffi_call_loop\n"
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"mffi_call_void:\n"
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"call edx\n"
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: "=a"(ret)
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: "b"(nparams), "S"(p), "d"(target), "D"(&old_esp)
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: "ecx"
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);
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// If esp doesn't match, this was probably a cdecl and not a stdcall.
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// Move the stack pointer back to where it should be
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asm volatile(INTEL_ASM
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"mov edx, [edi]\n"
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"cmp edx, esp\n"
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"cmovne esp, edx"
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:
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: "D"(&old_esp)
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: "edx"
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);
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return ret;
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}
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#endif
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