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import RT-Thread@9217865c without bsp, libcpu and components/net

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This commit is contained in:
Zihao Yu 2023-05-20 16:23:33 +08:00
commit e2376a3709
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121
components/lwp/arch/arm/common/reloc.c Normal file
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#include "mm_aspace.h"
#include <rtthread.h>
#include <stdint.h>
#include <string.h>
#include <lwp_elf.h>
#ifdef ARCH_MM_MMU
#include <mmu.h>
#include <page.h>
#endif
typedef struct
{
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_sym;
#ifdef ARCH_MM_MMU
void arch_elf_reloc(rt_aspace_t aspace, void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf32_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;
/*
memcpy(&v1, rel_dyn_start + rel_off, 4);
memcpy(&v2, rel_dyn_start + rel_off + 4, 4);
*/
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)rel_dyn_start + rel_off));
addr = (void*)((char*)addr - PV_OFFSET);
memcpy(&v1, addr, 4);
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)rel_dyn_start + rel_off + 4));
addr = (void*)((char*)addr - PV_OFFSET);
memcpy(&v2, addr, 4);
addr = rt_hw_mmu_v2p(aspace, (void*)((char*)text_start + v1));
addr = (void*)((char*)addr - PV_OFFSET);
if ((v2 & 0xff) == R_ARM_RELATIVE)
{
// *(uint32_t*)(text_start + v1) += (uint32_t)text_start;
*(uint32_t*)addr += (uint32_t)text_start;
}
else if ((v2 & 0xff) == R_ARM_ABS32)
{
uint32_t t;
t = (v2 >> 8);
if (t) /* 0 is UDF */
{
// *(uint32_t*)(text_start + v1) = (uint32_t)(text_start + dynsym[t].st_value);
*(uint32_t*)addr = (uint32_t)((char*)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;
addr = rt_hw_mmu_v2p(aspace, got_item);
addr = (void*)((char*)addr - PV_OFFSET);
*(uint32_t *)addr += (uint32_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, Elf32_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, (void*)((char*)rel_dyn_start + rel_off), 4);
memcpy(&v2, (void*)((char*)rel_dyn_start + rel_off + 4), 4);
if ((v2 & 0xff) == R_ARM_RELATIVE)
{
*(uint32_t*)((char*)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*)((char*)text_start + v1) = (uint32_t)((char*)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