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helper for extracting DWARF sections in COFF files

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This commit is contained in:
Nikita Smith
2025-01-31 13:26:33 -08:00
parent 8d9f85bfcc
commit ea6a84ca57
4 changed files with 56 additions and 43 deletions
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src/dwarf/dwarf_coff.c
+7
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@@ -0,0 +1,7 @@
// Copyright (c) 2024 Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)
#pragma once
internal DW_SectionArray dw_sections_from_coff_section_table(Arena *arena, String8 raw_image, U64 string_table_off, U64 section_count, COFF_SectionHeader *sections);
src/dwarf/dwarf_coff.h
+45
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@@ -0,0 +1,45 @@
// Copyright (c) 2024 Epic Games Tools
// Licensed under the MIT license (https://opensource.org/license/mit/)
internal DW_SectionArray
dw_sections_from_coff_section_table(Arena *arena,
String8 raw_image,
U64 string_table_off,
U64 section_count,
COFF_SectionHeader *sections)
{
DW_SectionArray result = {0};
B32 sect_status[ArrayCount(result.v)] = {0};
for (U64 i = 0; i < section_count; ++i) {
COFF_SectionHeader *header = &sections[i];
Rng1U64 raw_data_range = rng_1u64(header->foff, header->foff + header->fsize);
String8 name = coff_name_from_section_header(raw_image, header, string_table_off);
DW_SectionKind s = DW_Section_Null;
B32 is_dwo = 0;
#define X(_K,_L,_M,_W) \
if (str8_match_lit(_L, name, 0)) { s = DW_Section_##_K; } \
if (str8_match_lit(_M, name, 0)) { s = DW_Section_##_K; } \
if (str8_match_lit(_W, name, 0)) { s = DW_Section_##_K; is_dwo = 1; }
DW_SectionKind_XList(X)
#undef X
if (s != DW_Section_Null) {
if (sect_status[s]) {
Assert(!"too many debug sections with identical name, picking first");
} else {
sect_status[s] = 1;
DW_Section *d = &result.v[s];
d->name = push_str8_copy(arena, name);
d->data = str8_substr(raw_image, raw_data_range);
d->mode = dim_1u64(raw_data_range) > max_U32 ? DW_Mode_64Bit : DW_Mode_32Bit;
d->is_dwo = is_dwo;
}
}
}
return result;
}
src/raddump/raddump.c
+2 -43
View File
@@ -474,47 +474,6 @@ rd_section_markers_from_coff_symbol_table(Arena *arena, String8 raw_data, U64 st
return result;
}
internal DW_SectionArray
rd_dw_sections_from_coff_section_table(Arena *arena,
String8 raw_image,
U64 string_table_off,
U64 section_count,
COFF_SectionHeader *sections)
{
DW_SectionArray result = {0};
B32 sect_status[ArrayCount(result.v)] = {0};
for (U64 i = 0; i < section_count; ++i) {
COFF_SectionHeader *header = &sections[i];
Rng1U64 raw_data_range = rng_1u64(header->foff, header->foff + header->fsize);
String8 name = coff_name_from_section_header(raw_image, header, string_table_off);
DW_SectionKind s = DW_Section_Null;
B32 is_dwo = 0;
#define X(_K,_L,_M,_W) \
if (str8_match_lit(_L, name, 0)) { s = DW_Section_##_K; } \
if (str8_match_lit(_M, name, 0)) { s = DW_Section_##_K; } \
if (str8_match_lit(_W, name, 0)) { s = DW_Section_##_K; is_dwo = 1; }
DW_SectionKind_XList(X)
#undef X
if (s != DW_Section_Null) {
if (sect_status[s]) {
rd_warningf("file contains multiple %S sections, picking first", name);
} else {
sect_status[s] = 1;
DW_Section *d = &result.v[s];
d->name = push_str8_copy(arena, name);
d->data = str8_substr(raw_image, raw_data_range);
d->mode = dim_1u64(raw_data_range) > max_U32 ? DW_Mode_64Bit : DW_Mode_32Bit;
d->is_dwo = is_dwo;
}
}
}
return result;
}
internal RD_DisasmResult
rd_disasm_next_instruction(Arena *arena, Arch arch, U64 addr, String8 raw_code)
{
@@ -6210,7 +6169,7 @@ coff_print_obj(Arena *arena, String8List *out, String8 indent, String8 raw_data,
}
if (opts & RD_Option_Dwarf) {
DW_SectionArray dwarf_sections = rd_dw_sections_from_coff_section_table(scratch.arena, raw_data, string_table_off, header->section_count, sections);
DW_SectionArray dwarf_sections = dw_sections_from_coff_section_table(scratch.arena, raw_data, string_table_off, header->section_count, sections);
dw_format(arena, out, indent, opts, &dwarf_sections, arch, Image_CoffPe);
}
@@ -7952,7 +7911,7 @@ pe_print(Arena *arena, String8List *out, String8 indent, String8 raw_data, RD_Op
}
if (opts & RD_Option_Dwarf) {
DW_SectionArray dwarf_sections = rd_dw_sections_from_coff_section_table(scratch.arena, raw_data, string_table_off, file_header->section_count, sections);
DW_SectionArray dwarf_sections = dw_sections_from_coff_section_table(scratch.arena, raw_data, string_table_off, file_header->section_count, sections);
dw_format(arena, out, indent, opts, &dwarf_sections, arch, Image_CoffPe);
}
src/raddump/raddump_main.c
+2
View File
@@ -44,6 +44,7 @@
#include "dwarf/dwarf_parse.h"
#include "dwarf/dwarf_expr.h"
#include "dwarf/dwarf_unwind.h"
#include "dwarf/dwarf_coff.h"
#include "dwarf/dwarf_enum.h"
#include "base/base_inc.c"
@@ -70,6 +71,7 @@
#include "dwarf/dwarf_parse.c"
#include "dwarf/dwarf_expr.c"
#include "dwarf/dwarf_unwind.c"
#include "dwarf/dwarf_coff.c"
#include "dwarf/dwarf_enum.c"
#include "linker/base_ext/base_inc.h"