#include <rtthread.h> #include <stdint.h> #include <string.h> #include <elf.h> #ifdef ARCH_MM_MMU #include <mmu.h> #include <page.h> #endif typedef struct { Elf64_Word st_name; Elf64_Addr st_value; Elf64_Word st_size; unsigned char st_info; unsigned char st_other; Elf64_Half st_shndx; } Elf64_sym; #ifdef ARCH_MM_MMU void arch_elf_reloc(rt_mmu_info *m_info, void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf64_sym *dynsym) { size_t rel_off; void* addr; if (rel_dyn_size && !dynsym) { return; } for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8) { uint32_t v1, v2; addr = rt_hw_mmu_v2p(m_info, (void *)(((rt_size_t)rel_dyn_start) + rel_off)); memcpy(&v1, addr, 4); addr = rt_hw_mmu_v2p(m_info, (void *)(((rt_size_t)rel_dyn_start) + rel_off + 4)); memcpy(&v2, addr, 4); addr = rt_hw_mmu_v2p(m_info, (void *)((rt_size_t)text_start + v1)); if ((v2 & 0xff) == R_ARM_RELATIVE) { *(rt_size_t*)addr += (rt_size_t)text_start; } else if ((v2 & 0xff) == R_ARM_ABS32) { uint32_t t; t = (v2 >> 8); if (t) /* 0 is UDF */ { *(rt_size_t*)addr = (((rt_size_t)text_start) + dynsym[t].st_value); } } } /* modify got */ if (got_size) { uint32_t *got_item = (uint32_t*)got_start; for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++) { addr = rt_hw_mmu_v2p(m_info, got_item); *(rt_size_t *)addr += (rt_size_t)text_start; } } } #else void arch_elf_reloc(void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf64_sym *dynsym) { size_t rel_off; if (rel_dyn_size && !dynsym) { return; } for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8) { uint32_t v1, v2; memcpy(&v1, ((rt_uint8_t *)rel_dyn_start) + rel_off, 4); memcpy(&v2, ((rt_uint8_t *)rel_dyn_start) + rel_off + 4, 4); if ((v2 & 0xff) == R_ARM_RELATIVE) { *(uint32_t*)(((rt_size_t)text_start) + v1) += (uint32_t)text_start; } else if ((v2 & 0xff) == R_ARM_ABS32) { uint32_t t; t = (v2 >> 8); if (t) /* 0 is UDF */ { *(uint32_t*)(((rt_size_t)text_start) + v1) = (uint32_t)(((rt_size_t)text_start) + dynsym[t].st_value); } } } /* modify got */ if (got_size) { uint32_t *got_item = (uint32_t*)got_start; for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++) { *got_item += (uint32_t)text_start; } } } #endif