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author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2016-09-18 02:38:01 +0200 |
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committer | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2016-09-18 02:38:01 +0200 |
commit | dc8479928c5aee4c6ad6fe4f59006fb604cee701 (patch) | |
tree | 569a7f13128450bbab973236615587ff00bced5f /src/core/loader/elf.cpp | |
parent | Travis: Import Dolphin’s clang-format hook. (diff) | |
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Diffstat (limited to 'src/core/loader/elf.cpp')
-rw-r--r-- | src/core/loader/elf.cpp | 231 |
1 files changed, 127 insertions, 104 deletions
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp index 69df94324..53c10a456 100644 --- a/src/core/loader/elf.cpp +++ b/src/core/loader/elf.cpp @@ -3,8 +3,8 @@ // Refer to the license.txt file included. #include <cstring> -#include <string> #include <memory> +#include <string> #include "common/common_types.h" #include "common/file_util.h" @@ -24,112 +24,111 @@ using Kernel::CodeSet; // File type enum ElfType { - ET_NONE = 0, - ET_REL = 1, - ET_EXEC = 2, - ET_DYN = 3, - ET_CORE = 4, + 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_NONE = 0, + EM_M32 = 1, EM_SPARC = 2, - EM_386 = 3, - EM_68K = 4, - EM_88K = 5, - EM_860 = 7, - EM_MIPS = 8 + EM_386 = 3, + EM_68K = 4, + EM_88K = 5, + EM_860 = 7, + EM_MIPS = 8 }; // File version -#define EV_NONE 0 +#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_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_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_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, +enum ElfSectionFlags { + SHF_WRITE = 0x1, + SHF_ALLOC = 0x2, SHF_EXECINSTR = 0x4, - SHF_MASKPROC = 0xF0000000, + 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 +#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_X 0x1 +#define PF_W 0x2 +#define PF_R 0x4 #define PF_MASKPROC 0xF0000000 -typedef unsigned int Elf32_Addr; +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; +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; + 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 @@ -138,7 +137,7 @@ struct Elf32_Shdr { Elf32_Word sh_type; Elf32_Word sh_flags; Elf32_Addr sh_addr; - Elf32_Off sh_offset; + Elf32_Off sh_offset; Elf32_Word sh_size; Elf32_Word sh_link; Elf32_Word sh_info; @@ -149,7 +148,7 @@ struct Elf32_Shdr { // Segment header struct Elf32_Phdr { Elf32_Word p_type; - Elf32_Off p_offset; + Elf32_Off p_offset; Elf32_Addr p_vaddr; Elf32_Addr p_paddr; Elf32_Word p_filesz; @@ -160,12 +159,12 @@ struct Elf32_Phdr { // Symbol table entry struct Elf32_Sym { - Elf32_Word st_name; - Elf32_Addr st_value; - Elf32_Word st_size; + Elf32_Word st_name; + Elf32_Addr st_value; + Elf32_Word st_size; unsigned char st_info; unsigned char st_other; - Elf32_Half st_shndx; + Elf32_Half st_shndx; }; // Relocation entries @@ -181,35 +180,51 @@ typedef int SectionID; class ElfReader { private: - char *base; - u32 *base32; + char* base; + u32* base32; - Elf32_Ehdr *header; - Elf32_Phdr *segments; - Elf32_Shdr *sections; + Elf32_Ehdr* header; + Elf32_Phdr* segments; + Elf32_Shdr* sections; - u32 *sectionAddrs; + u32* sectionAddrs; bool relocate; u32 entryPoint; public: - ElfReader(void *ptr); + ElfReader(void* ptr); - u32 Read32(int off) const { return base32[off >> 2]; } + u32 Read32(int off) const { + return base32[off >> 2]; + } // Quick accessors - ElfType GetType() const { return (ElfType)(header->e_type); } - ElfMachine GetMachine() const { return (ElfMachine)(header->e_machine); } - u32 GetEntryPoint() const { return entryPoint; } - u32 GetFlags() const { return (u32)(header->e_flags); } + ElfType GetType() const { + return (ElfType)(header->e_type); + } + ElfMachine GetMachine() const { + return (ElfMachine)(header->e_machine); + } + u32 GetEntryPoint() const { + return entryPoint; + } + u32 GetFlags() const { + return (u32)(header->e_flags); + } SharedPtr<CodeSet> LoadInto(u32 vaddr); bool LoadSymbols(); - int GetNumSegments() const { return (int)(header->e_phnum); } - int GetNumSections() const { return (int)(header->e_shnum); } - const u8 *GetPtr(int offset) const { return (u8*)base + offset; } - const char *GetSectionName(int section) const; - const u8 *GetSectionDataPtr(int section) const { + int GetNumSegments() const { + return (int)(header->e_phnum); + } + int GetNumSections() const { + return (int)(header->e_shnum); + } + const u8* GetPtr(int offset) const { + return (u8*)base + offset; + } + const char* GetSectionName(int section) const; + const u8* GetSectionDataPtr(int section) const { if (section < 0 || section >= header->e_shnum) return nullptr; if (sections[section].sh_type != SHT_NOBITS) @@ -220,19 +235,23 @@ public: bool IsCodeSection(int section) const { return sections[section].sh_type == SHT_PROGBITS; } - const u8 *GetSegmentPtr(int segment) { + const u8* GetSegmentPtr(int segment) { return GetPtr(segments[segment].p_offset); } - u32 GetSectionAddr(SectionID section) const { return sectionAddrs[section]; } - unsigned int GetSectionSize(SectionID section) const { return sections[section].sh_size; } - SectionID GetSectionByName(const char *name, int firstSection = 0) const; //-1 for not found + u32 GetSectionAddr(SectionID section) const { + return sectionAddrs[section]; + } + unsigned int GetSectionSize(SectionID section) const { + return sections[section].sh_size; + } + SectionID GetSectionByName(const char* name, int firstSection = 0) const; //-1 for not found bool DidRelocate() const { return relocate; } }; -ElfReader::ElfReader(void *ptr) { +ElfReader::ElfReader(void* ptr) { base = (char*)ptr; base32 = (u32*)ptr; header = (Elf32_Ehdr*)ptr; @@ -245,7 +264,7 @@ ElfReader::ElfReader(void *ptr) { LoadSymbols(); } -const char *ElfReader::GetSectionName(int section) const { +const char* ElfReader::GetSectionName(int section) const { if (sections[section].sh_type == SHT_NULL) return nullptr; @@ -303,12 +322,15 @@ SharedPtr<CodeSet> ElfReader::LoadInto(u32 vaddr) { } else if (permission_flags == (PF_R | PF_W)) { codeset_segment = &codeset->data; } else { - LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id %u with flags %X", i, p->p_flags); + LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id %u with flags %X", i, + p->p_flags); continue; } if (codeset_segment->size != 0) { - LOG_ERROR(Loader, "ELF has more than one segment of the same type. Skipping extra segment (id %i)", i); + LOG_ERROR(Loader, "ELF has more than one segment of the same type. Skipping extra " + "segment (id %i)", + i); continue; } @@ -332,9 +354,9 @@ SharedPtr<CodeSet> ElfReader::LoadInto(u32 vaddr) { return codeset; } -SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const { +SectionID ElfReader::GetSectionByName(const char* name, int firstSection) const { for (int i = firstSection; i < header->e_shnum; i++) { - const char *secname = GetSectionName(i); + const char* secname = GetSectionName(i); if (secname != nullptr && strcmp(name, secname) == 0) return i; @@ -347,9 +369,9 @@ bool ElfReader::LoadSymbols() { SectionID sec = GetSectionByName(".symtab"); if (sec != -1) { int stringSection = sections[sec].sh_link; - const char *stringBase = reinterpret_cast<const char*>(GetSectionDataPtr(stringSection)); + const char* stringBase = reinterpret_cast<const char*>(GetSectionDataPtr(stringSection)); - //We have a symbol table! + // We have a symbol table! const Elf32_Sym* symtab = reinterpret_cast<const Elf32_Sym*>(GetSectionDataPtr(sec)); unsigned int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym); for (unsigned sym = 0; sym < numSymbols; sym++) { @@ -359,7 +381,7 @@ bool ElfReader::LoadSymbols() { int type = symtab[sym].st_info & 0xF; - const char *name = stringBase + symtab[sym].st_name; + const char* name = stringBase + symtab[sym].st_name; Symbols::Add(symtab[sym].st_value, name, size, type); @@ -411,7 +433,8 @@ ResultStatus AppLoader_ELF::Load() { Kernel::g_current_process->address_mappings = default_address_mappings; // Attach the default resource limit (APPLICATION) to the process - Kernel::g_current_process->resource_limit = Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION); + Kernel::g_current_process->resource_limit = + Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION); Kernel::g_current_process->Run(48, Kernel::DEFAULT_STACK_SIZE); |