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185526d134
BDK will allow developers to use the full collection of drivers, with limited editing, if any, for making payloads for Nintendo Switch. Using a single source for everything will also help decoupling Switch specific code and easily port it to other Tegra X1/X1+ platforms. And maybe even to lower targets. Everything is now centrilized into bdk folder. Every module or project can utilize it by simply including it. This is just the start and it will continue to improve.
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <m4x@m4xw.net> wrote this file. As long as you retain this notice you can do
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* whatever you want with this stuff. If we meet some day, and you think this
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* stuff is worth it, you can buy me a beer in return. M4xw
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* ----------------------------------------------------------------------------
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*/
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#include "elfload.h"
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#if defined(__arm__)
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// Taken from http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044f/IHI0044F_aaelf.pdf
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#define R_ARM_NONE 0
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#define R_ARM_ABS32 2
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#define R_ARM_JUMP_SLOT 22
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#define R_ARM_GLOB_DAT 21
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#define R_ARM_RELATIVE 23
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el_status el_applyrel(el_ctx *ctx, Elf_Rel *rel)
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{
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uint32_t sym = ELF_R_SYM(rel->r_info); // Symbol offset
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uint32_t type = ELF_R_TYPE(rel->r_info); // Relocation Type
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uintptr_t *p = (uintptr_t *)(rel->r_offset + ctx->base_load_paddr); // Target Addr
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#if 0 // For later symbol usage
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Elf32_Sym *elfSym;
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const char *symbolName;
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// We resolve relocs from the originating elf-image
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elfSym = (Elf32_Sym *)(ctx->symtab.sh_offset + (char *)buffteg) + sym;
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int strtab_offset = ctx->shstr.sh_offset;
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char *strtab = (char *)buffteg + strtab_offset;
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symbolName = strtab + elfSym->st_name;
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//EL_DEBUG("Str: %s sz: %x val: %x\n", symbolName, elfSym->st_size, elfSym->st_value);
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#endif
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switch (type)
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{
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case R_ARM_NONE:
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EL_DEBUG("R_ARM_NONE\n");
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break;
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case R_ARM_JUMP_SLOT:
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case R_ARM_ABS32:
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case R_ARM_GLOB_DAT:
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// Stubbed for later purpose
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//*p += elfSym->st_value; // + vaddr from sec
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//*p |= 0; // 1 if Thumb && STT_FUNC, ignored for now
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break;
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case R_ARM_RELATIVE: // Needed for PIE
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if (sym)
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{
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return EL_BADREL;
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}
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*p += ctx->base_load_vaddr;
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break;
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default:
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return EL_BADREL;
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}
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return EL_OK;
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}
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#endif
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