121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
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#include <rtthread.h>
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#include <stdint.h>
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#include <string.h>
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#include <lwp_elf.h>
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#ifdef RT_USING_USERSPACE
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#include <mmu.h>
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#include <page.h>
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#endif
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typedef struct
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{
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_sym;
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#ifdef RT_USING_USERSPACE
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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, Elf32_sym *dynsym)
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{
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size_t rel_off;
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void* addr;
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if (rel_dyn_size && !dynsym)
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{
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return;
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}
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for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
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{
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uint32_t v1, v2;
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/*
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memcpy(&v1, rel_dyn_start + rel_off, 4);
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memcpy(&v2, rel_dyn_start + rel_off + 4, 4);
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*/
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addr = rt_hw_mmu_v2p(m_info, (void*)((char*)rel_dyn_start + rel_off));
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addr = (void*)((char*)addr - PV_OFFSET);
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memcpy(&v1, addr, 4);
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addr = rt_hw_mmu_v2p(m_info, (void*)((char*)rel_dyn_start + rel_off + 4));
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addr = (void*)((char*)addr - PV_OFFSET);
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memcpy(&v2, addr, 4);
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addr = rt_hw_mmu_v2p(m_info, (void*)((char*)text_start + v1));
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addr = (void*)((char*)addr - PV_OFFSET);
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if ((v2 & 0xff) == R_ARM_RELATIVE)
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{
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// *(uint32_t*)(text_start + v1) += (uint32_t)text_start;
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*(uint32_t*)addr += (uint32_t)text_start;
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}
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else if ((v2 & 0xff) == R_ARM_ABS32)
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{
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uint32_t t;
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t = (v2 >> 8);
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if (t) /* 0 is UDF */
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{
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// *(uint32_t*)(text_start + v1) = (uint32_t)(text_start + dynsym[t].st_value);
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*(uint32_t*)addr = (uint32_t)((char*)text_start + dynsym[t].st_value);
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}
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}
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}
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/* modify got */
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if (got_size)
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{
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uint32_t *got_item = (uint32_t*)got_start;
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for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
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{
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//*got_item += (uint32_t)text_start;
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addr = rt_hw_mmu_v2p(m_info, got_item);
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addr = (void*)((char*)addr - PV_OFFSET);
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*(uint32_t *)addr += (uint32_t)text_start;
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}
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}
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}
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#else
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void arch_elf_reloc(void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf32_sym *dynsym)
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{
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size_t rel_off;
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if (rel_dyn_size && !dynsym)
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{
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return;
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}
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for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
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{
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uint32_t v1, v2;
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memcpy(&v1, (void*)((char*)rel_dyn_start + rel_off), 4);
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memcpy(&v2, (void*)((char*)rel_dyn_start + rel_off + 4), 4);
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if ((v2 & 0xff) == R_ARM_RELATIVE)
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{
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*(uint32_t*)((char*)text_start + v1) += (uint32_t)text_start;
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}
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else if ((v2 & 0xff) == R_ARM_ABS32)
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{
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uint32_t t;
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t = (v2 >> 8);
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if (t) /* 0 is UDF */
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{
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*(uint32_t*)((char*)text_start + v1) = (uint32_t)((char*)text_start + dynsym[t].st_value);
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}
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}
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}
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/* modify got */
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if (got_size)
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{
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uint32_t *got_item = (uint32_t*)got_start;
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for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
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{
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*got_item += (uint32_t)text_start;
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}
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}
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}
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#endif
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