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WIP function pad min

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This commit is contained in:
Nikita Smith
2025-06-25 10:53:24 -07:00
committed by Ryan Fleury
parent d7b8de5998
commit a5119e3b51
10 changed files with 204 additions and 78 deletions
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src/torture/torture.c
+43
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@@ -3352,6 +3352,48 @@ exit:;
return result;
}
internal T_Result
t_function_pad_min(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 ret[] = { 0xc3, 0xc3, 0xc3 };
COFF_ObjSection *text_sect = t_push_text_section(obj_writer, str8_array_fixed(ret));
coff_obj_writer_push_symbol_extern_func(obj_writer, str8_lit("A"), 0, text_sect);
coff_obj_writer_push_symbol_extern_func(obj_writer, str8_lit("B"), 1, text_sect);
coff_obj_writer_push_symbol_extern_func(obj_writer, str8_lit("C"), 2, text_sect);
String8 obj = coff_obj_writer_serialize(scratch.arena, obj_writer);
coff_obj_writer_release(&obj_writer);
if (!t_write_file(str8_lit("funcs.obj"), obj)) { goto exit; }
}
int linker_exit_code = t_invoke_linkerf("/subsystem:console /entry:A /functionpadmin:8 /out:a.exe funcs.obj");
if (linker_exit_code != 0) { goto exit; }
String8 exe = t_read_file(scratch.arena, str8_lit("a.exe"));
PE_BinInfo pe = pe_bin_info_from_data(scratch.arena, exe);
COFF_SectionHeader *section_table = (COFF_SectionHeader *)str8_substr(exe, pe.section_table_range).str;
String8 string_table = str8_substr(exe, pe.string_table_range);
COFF_SectionHeader *text_sect = t_coff_section_header_from_name(string_table, section_table, pe.section_count, str8_lit(".text"));
if (text_sect == 0) { goto exit; }
String8 text_data = str8_substr(exe, rng_1u64(text_sect->foff, text_sect->foff + text_sect->vsize));
U8 expected_text[] = {
0xc3, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc,
0xc3, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc,
0xc3, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc
};
if (!str8_match(text_data, str8_array_fixed(expected_text), 0)) { goto exit; }
result = T_Result_Pass;
exit:;
scratch_end(scratch);
return result;
}
////////////////////////////////////////////////////////////////
internal void
@@ -3405,6 +3447,7 @@ entry_point(CmdLine *cmdline)
{ "delay_import_user32", t_delay_import_user32 },
{ "empty_section", t_empty_section },
{ "removed_section", t_removed_section },
{ "function_pad_min", t_function_pad_min },
//{ "import_export", t_import_export },
};