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Elf loader: do not load .ARM.* sections (#1850)

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* Elf loader: do not load .ARM sections
* Fix section name
This commit is contained in:
Sergey Gavrilov 2022-10-09 01:51:51 +10:00 committed by GitHub
parent c13929330e
commit 981f7ff8b0
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 41 additions and 0 deletions
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41
lib/flipper_application/elf/elf_file.c
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@ -452,6 +452,10 @@ static bool elf_load_debug_link(ELFFile* elf, Elf32_Shdr* section_header) {
section_header->sh_size; section_header->sh_size;
} }
static bool str_prefix(const char* str, const char* prefix) {
return strncmp(prefix, str, strlen(prefix)) == 0;
}
static bool elf_load_section_data(ELFFile* elf, ELFSection* section, Elf32_Shdr* section_header) { static bool elf_load_section_data(ELFFile* elf, ELFSection* section, Elf32_Shdr* section_header) {
if(section_header->sh_size == 0) { if(section_header->sh_size == 0) {
FURI_LOG_D(TAG, "No data for section"); FURI_LOG_D(TAG, "No data for section");
@ -485,6 +489,43 @@ static SectionType elf_preload_section(
FlipperApplicationManifest* manifest) { FlipperApplicationManifest* manifest) {
const char* name = furi_string_get_cstr(name_string); const char* name = furi_string_get_cstr(name_string);
#ifdef ELF_DEBUG_LOG
// log section name, type and flags
FuriString* flags_string = furi_string_alloc();
if(section_header->sh_flags & SHF_WRITE) furi_string_cat(flags_string, "W");
if(section_header->sh_flags & SHF_ALLOC) furi_string_cat(flags_string, "A");
if(section_header->sh_flags & SHF_EXECINSTR) furi_string_cat(flags_string, "X");
if(section_header->sh_flags & SHF_MERGE) furi_string_cat(flags_string, "M");
if(section_header->sh_flags & SHF_STRINGS) furi_string_cat(flags_string, "S");
if(section_header->sh_flags & SHF_INFO_LINK) furi_string_cat(flags_string, "I");
if(section_header->sh_flags & SHF_LINK_ORDER) furi_string_cat(flags_string, "L");
if(section_header->sh_flags & SHF_OS_NONCONFORMING) furi_string_cat(flags_string, "O");
if(section_header->sh_flags & SHF_GROUP) furi_string_cat(flags_string, "G");
if(section_header->sh_flags & SHF_TLS) furi_string_cat(flags_string, "T");
if(section_header->sh_flags & SHF_COMPRESSED) furi_string_cat(flags_string, "T");
if(section_header->sh_flags & SHF_MASKOS) furi_string_cat(flags_string, "o");
if(section_header->sh_flags & SHF_MASKPROC) furi_string_cat(flags_string, "p");
if(section_header->sh_flags & SHF_ORDERED) furi_string_cat(flags_string, "R");
if(section_header->sh_flags & SHF_EXCLUDE) furi_string_cat(flags_string, "E");
FURI_LOG_I(
TAG,
"Section %s: type: %ld, flags: %s",
name,
section_header->sh_type,
furi_string_get_cstr(flags_string));
furi_string_free(flags_string);
#endif
// ignore .ARM and .rel.ARM sections
// TODO: how to do it not by name?
// .ARM: type 0x70000001, flags SHF_ALLOC | SHF_LINK_ORDER
// .rel.ARM: type 0x9, flags SHT_REL
if(str_prefix(name, ".ARM.") || str_prefix(name, ".rel.ARM.")) {
FURI_LOG_D(TAG, "Ignoring ARM section");
return SectionTypeUnused;
}
// Load allocable section // Load allocable section
if(section_header->sh_flags & SHF_ALLOC) { if(section_header->sh_flags & SHF_ALLOC) {
ELFSection* section_p = elf_file_get_or_put_section(elf, name); ELFSection* section_p = elf_file_get_or_put_section(elf, name);