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author | Liam <byteslice@airmail.cc> | 2022-06-05 05:50:43 +0200 |
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committer | Liam <byteslice@airmail.cc> | 2022-06-05 15:42:05 +0200 |
commit | 3c313a43fde6e1f1ef74fd874ca9bf2611be9d95 (patch) | |
tree | 89ed86920027a857bcdab5cfc947f220dabd5602 /src/core/loader | |
parent | Merge pull request #8410 from liamwhite/thread-names (diff) | |
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Diffstat (limited to 'src/core/loader')
-rw-r--r-- | src/core/loader/elf.cpp | 183 |
1 files changed, 16 insertions, 167 deletions
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp index cf5933699..dfb10c34f 100644 --- a/src/core/loader/elf.cpp +++ b/src/core/loader/elf.cpp @@ -6,6 +6,7 @@ #include <memory> #include "common/common_funcs.h" #include "common/common_types.h" +#include "common/elf.h" #include "common/logging/log.h" #include "core/hle/kernel/code_set.h" #include "core/hle/kernel/k_page_table.h" @@ -13,159 +14,7 @@ #include "core/loader/elf.h" #include "core/memory.h" -//////////////////////////////////////////////////////////////////////////////////////////////////// -// ELF Header Constants - -// File type -enum ElfType { - ET_NONE = 0, - ET_REL = 1, - ET_EXEC = 2, - ET_DYN = 3, - ET_CORE = 4, - ET_LOPROC = 0xFF00, - ET_HIPROC = 0xFFFF, -}; - -// Machine/Architecture -enum ElfMachine { - EM_NONE = 0, - EM_M32 = 1, - EM_SPARC = 2, - EM_386 = 3, - EM_68K = 4, - EM_88K = 5, - EM_860 = 7, - EM_MIPS = 8 -}; - -// File version -#define EV_NONE 0 -#define EV_CURRENT 1 - -// Identification index -#define EI_MAG0 0 -#define EI_MAG1 1 -#define EI_MAG2 2 -#define EI_MAG3 3 -#define EI_CLASS 4 -#define EI_DATA 5 -#define EI_VERSION 6 -#define EI_PAD 7 -#define EI_NIDENT 16 - -// Sections constants - -// Section types -#define SHT_NULL 0 -#define SHT_PROGBITS 1 -#define SHT_SYMTAB 2 -#define SHT_STRTAB 3 -#define SHT_RELA 4 -#define SHT_HASH 5 -#define SHT_DYNAMIC 6 -#define SHT_NOTE 7 -#define SHT_NOBITS 8 -#define SHT_REL 9 -#define SHT_SHLIB 10 -#define SHT_DYNSYM 11 -#define SHT_LOPROC 0x70000000 -#define SHT_HIPROC 0x7FFFFFFF -#define SHT_LOUSER 0x80000000 -#define SHT_HIUSER 0xFFFFFFFF - -// Section flags -enum ElfSectionFlags { - SHF_WRITE = 0x1, - SHF_ALLOC = 0x2, - SHF_EXECINSTR = 0x4, - SHF_MASKPROC = 0xF0000000, -}; - -// Segment types -#define PT_NULL 0 -#define PT_LOAD 1 -#define PT_DYNAMIC 2 -#define PT_INTERP 3 -#define PT_NOTE 4 -#define PT_SHLIB 5 -#define PT_PHDR 6 -#define PT_LOPROC 0x70000000 -#define PT_HIPROC 0x7FFFFFFF - -// Segment flags -#define PF_X 0x1 -#define PF_W 0x2 -#define PF_R 0x4 -#define PF_MASKPROC 0xF0000000 - -typedef unsigned int Elf32_Addr; -typedef unsigned short Elf32_Half; -typedef unsigned int Elf32_Off; -typedef signed int Elf32_Sword; -typedef unsigned int Elf32_Word; - -//////////////////////////////////////////////////////////////////////////////////////////////////// -// ELF file header - -struct Elf32_Ehdr { - unsigned char e_ident[EI_NIDENT]; - Elf32_Half e_type; - Elf32_Half e_machine; - Elf32_Word e_version; - Elf32_Addr e_entry; - Elf32_Off e_phoff; - Elf32_Off e_shoff; - Elf32_Word e_flags; - Elf32_Half e_ehsize; - Elf32_Half e_phentsize; - Elf32_Half e_phnum; - Elf32_Half e_shentsize; - Elf32_Half e_shnum; - Elf32_Half e_shstrndx; -}; - -// Section header -struct Elf32_Shdr { - Elf32_Word sh_name; - Elf32_Word sh_type; - Elf32_Word sh_flags; - Elf32_Addr sh_addr; - Elf32_Off sh_offset; - Elf32_Word sh_size; - Elf32_Word sh_link; - Elf32_Word sh_info; - Elf32_Word sh_addralign; - Elf32_Word sh_entsize; -}; - -// Segment header -struct Elf32_Phdr { - Elf32_Word p_type; - Elf32_Off p_offset; - Elf32_Addr p_vaddr; - Elf32_Addr p_paddr; - Elf32_Word p_filesz; - Elf32_Word p_memsz; - Elf32_Word p_flags; - Elf32_Word p_align; -}; - -// Symbol table entry -struct Elf32_Sym { - Elf32_Word st_name; - Elf32_Addr st_value; - Elf32_Word st_size; - unsigned char st_info; - unsigned char st_other; - Elf32_Half st_shndx; -}; - -// Relocation entries -struct Elf32_Rel { - Elf32_Addr r_offset; - Elf32_Word r_info; -}; +using namespace Common::ELF; //////////////////////////////////////////////////////////////////////////////////////////////////// // ElfReader class @@ -193,11 +42,11 @@ public: } // Quick accessors - ElfType GetType() const { - return (ElfType)(header->e_type); + u16 GetType() const { + return header->e_type; } - ElfMachine GetMachine() const { - return (ElfMachine)(header->e_machine); + u16 GetMachine() const { + return header->e_machine; } VAddr GetEntryPoint() const { return entryPoint; @@ -220,13 +69,13 @@ public: const u8* GetSectionDataPtr(int section) const { if (section < 0 || section >= header->e_shnum) return nullptr; - if (sections[section].sh_type != SHT_NOBITS) + if (sections[section].sh_type != ElfShtNobits) return GetPtr(sections[section].sh_offset); else return nullptr; } bool IsCodeSection(int section) const { - return sections[section].sh_type == SHT_PROGBITS; + return sections[section].sh_type == ElfShtProgBits; } const u8* GetSegmentPtr(int segment) { return GetPtr(segments[segment].p_offset); @@ -256,7 +105,7 @@ ElfReader::ElfReader(void* ptr) { } const char* ElfReader::GetSectionName(int section) const { - if (sections[section].sh_type == SHT_NULL) + if (sections[section].sh_type == ElfShtNull) return nullptr; int name_offset = sections[section].sh_name; @@ -272,7 +121,7 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { LOG_DEBUG(Loader, "String section: {}", header->e_shstrndx); // Should we relocate? - relocate = (header->e_type != ET_EXEC); + relocate = (header->e_type != ElfTypeExec); if (relocate) { LOG_DEBUG(Loader, "Relocatable module"); @@ -288,7 +137,7 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { u64 total_image_size = 0; for (unsigned int i = 0; i < header->e_phnum; ++i) { const Elf32_Phdr* p = &segments[i]; - if (p->p_type == PT_LOAD) { + if (p->p_type == ElfPtLoad) { total_image_size += (p->p_memsz + 0xFFF) & ~0xFFF; } } @@ -303,14 +152,14 @@ Kernel::CodeSet ElfReader::LoadInto(VAddr vaddr) { LOG_DEBUG(Loader, "Type: {} Vaddr: {:08X} Filesz: {:08X} Memsz: {:08X} ", p->p_type, p->p_vaddr, p->p_filesz, p->p_memsz); - if (p->p_type == PT_LOAD) { + if (p->p_type == ElfPtLoad) { Kernel::CodeSet::Segment* codeset_segment; - u32 permission_flags = p->p_flags & (PF_R | PF_W | PF_X); - if (permission_flags == (PF_R | PF_X)) { + u32 permission_flags = p->p_flags & (ElfPfRead | ElfPfWrite | ElfPfExec); + if (permission_flags == (ElfPfRead | ElfPfExec)) { codeset_segment = &codeset.CodeSegment(); - } else if (permission_flags == (PF_R)) { + } else if (permission_flags == (ElfPfRead)) { codeset_segment = &codeset.RODataSegment(); - } else if (permission_flags == (PF_R | PF_W)) { + } else if (permission_flags == (ElfPfRead | ElfPfWrite)) { codeset_segment = &codeset.DataSegment(); } else { LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id {} with flags {:X}", i, |