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handle COMDAT symbols with non-zero section offset

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This commit is contained in:
Nikita Smith
2025-06-25 10:53:24 -07:00
committed by Ryan Fleury
parent 422829b196
commit 4c972c0fba
3 changed files with 102 additions and 119 deletions
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src/torture/torture.c
+52
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@@ -2738,6 +2738,57 @@ exit:;
return result;
}
internal T_Result
t_comdat_test(void)
{
Temp scratch = scratch_begin(0,0);
T_Result result = T_Result_Fail;
{
COFF_ObjWriter *obj_writer = coff_obj_writer_alloc(0, COFF_MachineType_X64);
U8 a[] = "1Hello, World!";
COFF_ObjSection *sect = coff_obj_writer_push_section(obj_writer, str8_lit(".rdata"), PE_RDATA_SECTION_FLAGS|COFF_SectionFlag_LnkCOMDAT, str8_array_fixed(a));
coff_obj_writer_push_symbol_secdef(obj_writer, sect, COFF_ComdatSelect_Largest);
coff_obj_writer_push_symbol_extern(obj_writer, str8_lit("TEST"), 1, sect);
String8 obj = coff_obj_writer_serialize(scratch.arena, obj_writer);
coff_obj_writer_release(&obj_writer);
if (!t_write_file(str8_lit("a.obj"), obj)) { goto exit; }
}
{
COFF_ObjWriter *obj_writer = coff_obj_writer_alloc(0, COFF_MachineType_X64);
U8 a[] = "Hello, World!";
COFF_ObjSection *sect = coff_obj_writer_push_section(obj_writer, str8_lit(".rdata"), PE_RDATA_SECTION_FLAGS|COFF_SectionFlag_LnkCOMDAT, str8_array_fixed(a));
coff_obj_writer_push_symbol_secdef(obj_writer, sect, COFF_ComdatSelect_Largest);
coff_obj_writer_push_symbol_extern(obj_writer, str8_lit("TEST"), 1, sect);
String8 obj = coff_obj_writer_serialize(scratch.arena, obj_writer);
coff_obj_writer_release(&obj_writer);
if (!t_write_file(str8_lit("b.obj"), obj)) { goto exit; }
}
{
COFF_ObjWriter *obj_writer = coff_obj_writer_alloc(0, COFF_MachineType_X64);
U8 text[] = {
0x48, 0xC7, 0xC0, 0x00, 0x00, 0x00, 0x00, // mov rax, $imm
0xC3 // ret
};
COFF_ObjSection *sect = coff_obj_writer_push_section(obj_writer, str8_lit(".text"), PE_TEXT_SECTION_FLAGS, str8_array_fixed(text));
coff_obj_writer_push_symbol_extern(obj_writer, str8_lit("entry"), 0, sect);
COFF_ObjSymbol *symbol = coff_obj_writer_push_symbol_undef(obj_writer, str8_lit("TEST"));
coff_obj_writer_section_push_reloc_voff(obj_writer, sect, 3, symbol);
String8 obj = coff_obj_writer_serialize(scratch.arena, obj_writer);
coff_obj_writer_release(&obj_writer);
if (!t_write_file(str8_lit("entry.obj"), obj)) { goto exit; }
}
int linker_exit_code = t_invoke_linkerf("/subsystem:console /entry:entry /out:a.exe a.obj b.obj entry.obj");
exit:;
result = T_Result_Pass;
scratch_end(scratch);
return result;
}
internal T_Result
t_sect_align(void)
{
@@ -3601,6 +3652,7 @@ entry_point(CmdLine *cmdline)
{ "comdat_associative_loop", t_comdat_associative_loop },
{ "comdat_associative_non_comdat", t_comdat_associative_non_comdat },
{ "comdat_associative_out_of_bounds", t_comdat_associative_out_of_bounds },
{ "comdat_test", t_comdat_test },
{ "alt_name", t_alt_name },
{ "include", t_include },
{ "communal_var_vs_regular_comdat", t_communal_var_vs_regular_comdat },