mirror of
https://github.com/libretro/ppsspp.git
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127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include "../../Globals.h"
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#include "ElfTypes.h"
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enum KnownElfTypes
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{
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KNOWNELF_PSP = 0,
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KNOWNELF_DS = 1,
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KNOWNELF_GBA = 2,
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};
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typedef int SectionID;
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class ElfReader
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{
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char *base;
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u32 *base32;
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Elf32_Ehdr *header;
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Elf32_Phdr *segments;
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Elf32_Shdr *sections;
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u32 *sectionOffsets;
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u32 *sectionAddrs;
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bool bRelocate;
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u32 entryPoint;
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u32 vaddr;
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u32 segmentVAddr[32];
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public:
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ElfReader(void *ptr)
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{
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INFO_LOG(LOADER, "ElfReader: %p", ptr);
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base = (char*)ptr;
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base32 = (u32 *)ptr;
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header = (Elf32_Ehdr*)ptr;
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segments = (Elf32_Phdr *)(base + header->e_phoff);
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sections = (Elf32_Shdr *)(base + header->e_shoff);
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}
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~ElfReader()
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{
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}
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u32 Read32(int off)
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{
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return base32[off>>2];
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}
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// Quick accessors
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ElfType GetType() { return (ElfType)(header->e_type); }
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ElfMachine GetMachine() { return (ElfMachine)(header->e_machine); }
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u32 GetEntryPoint() { return entryPoint; }
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u32 GetFlags() { return (u32)(header->e_flags); }
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int GetNumSegments() { return (int)(header->e_phnum); }
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int GetNumSections() { return (int)(header->e_shnum); }
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const char *GetSectionName(int section);
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u8 *GetPtr(int offset)
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{
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return (u8*)base + offset;
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}
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u8 *GetSectionDataPtr(int section)
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{
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if (section < 0 || section >= header->e_shnum)
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return 0;
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if (sections[section].sh_type != SHT_NOBITS)
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return GetPtr(sections[section].sh_offset);
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else
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return 0;
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}
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u8 *GetSegmentPtr(int segment)
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{
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return GetPtr(segments[segment].p_offset);
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}
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u32 GetSectionAddr(SectionID section) {return sectionAddrs[section];}
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int GetSectionSize(SectionID section)
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{
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return sections[section].sh_size;
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}
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SectionID GetSectionByName(const char *name, int firstSection=0); //-1 for not found
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u32 GetSegmentPaddr(int segment)
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{
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return segments[segment].p_paddr;
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}
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u32 GetSegmentOffset(int segment)
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{
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return segments[segment].p_offset;
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}
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u32 GetSegmentVaddr(int segment)
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{
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return segmentVAddr[segment];
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}
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bool DidRelocate() {
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return bRelocate;
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}
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u32 GetVaddr()
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{
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return vaddr;
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}
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// More indepth stuff:)
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bool LoadInto(u32 vaddr);
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bool LoadSymbols();
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void LoadRelocations(Elf32_Rel *rels, int numRelocs);
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};
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