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Merge pull request #3574 from jasonKercher/i386-syscall6

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fix 6 argument syscall on i386
This commit is contained in:
gingerBill
2024-05-11 21:50:49 +01:00
committed by GitHub
parent 321e4c45b0 20752d904b
commit f650690f61
1 changed files with 2 additions and 8 deletions
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src/llvm_backend_proc.cpp
+2 -8
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@@ -2835,8 +2835,7 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
{ {
GB_ASSERT(arg_count <= 7); GB_ASSERT(arg_count <= 7);
char asm_string_default[] = "int $$0x80"; char asm_string[] = "int $$0x80";
char *asm_string = asm_string_default;
gbString constraints = gb_string_make(heap_allocator(), "={eax}"); gbString constraints = gb_string_make(heap_allocator(), "={eax}");
for (unsigned i = 0; i < gb_min(arg_count, 6); i++) { for (unsigned i = 0; i < gb_min(arg_count, 6); i++) {
@@ -2848,16 +2847,11 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
"edx", "edx",
"esi", "esi",
"edi", "edi",
"ebp",
}; };
constraints = gb_string_appendc(constraints, regs[i]); constraints = gb_string_appendc(constraints, regs[i]);
constraints = gb_string_appendc(constraints, "}"); constraints = gb_string_appendc(constraints, "}");
} }
if (arg_count == 7) {
char asm_string7[] = "push %[arg6]\npush %%ebp\nmov 4(%%esp), %%ebp\nint $0x80\npop %%ebp\nadd $4, %%esp";
asm_string = asm_string7;
constraints = gb_string_appendc(constraints, ",rm");
}
inline_asm = llvm_get_inline_asm(func_type, make_string_c(asm_string), make_string_c(constraints)); inline_asm = llvm_get_inline_asm(func_type, make_string_c(asm_string), make_string_c(constraints));
} }