int
arch_elf_relocate_rel(struct elf_image_info *image,
struct elf_image_info *resolveImage, Elf32_Rel *rel, int relLength)
#endif
{
elf_addr S;
uint32 A;
uint32 P;
uint32 finalAddress;
uint32 *resolveAddress;
int i;
S = A = P = 0;
for (i = 0; i * (int)sizeof(Elf32_Rel) < relLength; i++) {
TRACE(("looking at rel type %s, offset 0x%lx\n",
kRelocations[ELF32_R_TYPE(rel[i].r_info)], rel[i].r_offset));
// calc S
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_386_32:
case R_386_PC32:
case R_386_GLOB_DAT:
case R_386_JMP_SLOT:
case R_386_GOTOFF:
{
Elf32_Sym *symbol;
status_t status;
symbol = SYMBOL(image, ELF32_R_SYM(rel[i].r_info));
#ifdef _BOOT_MODE
status = boot_elf_resolve_symbol(image, symbol, &S);
#else
status = elf_resolve_symbol(image, symbol, resolveImage, &S);
#endif
if (status < B_OK)
return status;
TRACE(("S %p (%s)\n", (void *)S, SYMNAME(image, symbol)));
}
}
// calc A
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_386_32:
case R_386_PC32:
case R_386_GOT32:
case R_386_PLT32:
case R_386_RELATIVE:
case R_386_GOTOFF:
case R_386_GOTPC:
A = *(uint32 *)(image->text_region.delta + rel[i].r_offset);
TRACE(("A %p\n", (void *)A));
break;
}
// calc P
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_386_PC32:
case R_386_GOT32:
case R_386_PLT32:
case R_386_GOTPC:
P = image->text_region.delta + rel[i].r_offset;
TRACE(("P %p\n", (void *)P));
break;
}
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_386_NONE:
continue;
case R_386_32:
finalAddress = S + A;
break;
case R_386_PC32:
finalAddress = S + A - P;
break;
case R_386_RELATIVE:
// B + A;
finalAddress = image->text_region.delta + A;
break;
case R_386_JMP_SLOT:
case R_386_GLOB_DAT:
finalAddress = S;
break;
default:
dprintf("arch_elf_relocate_rel: unhandled relocation type %d\n",
ELF32_R_TYPE(rel[i].r_info));
return B_BAD_DATA;
}
resolveAddress = (uint32 *)(image->text_region.delta + rel[i].r_offset);
#ifndef _BOOT_MODE
if (!is_in_image(image, (addr_t)resolveAddress)) {
dprintf("arch_elf_relocate_rel: invalid offset %#lx\n",
rel[i].r_offset);
return B_BAD_ADDRESS;
}
#endif
*resolveAddress = finalAddress;
TRACE(("-> offset %#lx (%#lx) = %#lx\n",
(image->text_region.delta + rel[i].r_offset), rel[i].r_offset, finalAddress));
}
return B_NO_ERROR;
}
int
arch_elf_relocate_rel(struct elf_image_info *image,
struct elf_image_info *resolveImage, struct Elf32_Rel *rel, int relLength)
#endif
{
addr_t S;
addr_t A;
addr_t P;
addr_t finalAddress;
addr_t *resolveAddress;
int i;
S = A = P = 0;
for (i = 0; i * (int)sizeof(struct Elf32_Rel) < relLength; i++) {
TRACE(("looking at rel type %s, offset 0x%lx\n",
kRelocations[ELF32_R_TYPE(rel[i].r_info)], rel[i].r_offset));
// calc S
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_ARM_JMP_SLOT:
case R_ARM_GLOB_DAT:
case R_ARM_ABS32:
{
struct Elf32_Sym *symbol;
status_t status;
symbol = SYMBOL(image, ELF32_R_SYM(rel[i].r_info));
#ifdef _BOOT_MODE
status = boot_elf_resolve_symbol(image, symbol, &S);
#else
status = elf_resolve_symbol(image, symbol, resolveImage, &S);
#endif
if (status < B_OK) {
#ifndef _BOOT_MODE
TRACE(("failed relocating %s\n", SYMNAME(image, symbol)));
#endif
//IRA return status;
return B_OK;
}
#ifndef _BOOT_MODE
TRACE(("S %p (%s)\n", (void *)S, SYMNAME(image, symbol)));
#endif
}
}
// calc A
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_ARM_ABS32:
case R_ARM_RELATIVE:
A = *(addr_t *)(image->text_region.delta + rel[i].r_offset);
TRACE(("A %p\n", (void *)A));
break;
}
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_ARM_NONE:
continue;
case R_ARM_RELATIVE:
// B + A;
finalAddress = image->text_region.delta + A;
break;
case R_ARM_JMP_SLOT:
case R_ARM_GLOB_DAT:
finalAddress = S;
break;
case R_ARM_ABS32:
finalAddress = S + A;
break;
default:
dprintf("arch_elf_relocate_rel: unhandled relocation type %d\n",
ELF32_R_TYPE(rel[i].r_info));
return B_BAD_DATA;
}
resolveAddress = (addr_t *)(image->text_region.delta + rel[i].r_offset);
#ifndef _BOOT_MODE
if (!is_in_image(image, (addr_t)resolveAddress)) {
dprintf("arch_elf_relocate_rel: invalid offset %#lx\n",
rel[i].r_offset);
return B_BAD_ADDRESS;
}
#endif
*resolveAddress = finalAddress;
TRACE(("-> offset %#lx = %#lx\n",
(image->text_region.delta + rel[i].r_offset), finalAddress));
}
return B_NO_ERROR;
}
int
arch_elf_relocate_rela(struct elf_image_info *image,
struct elf_image_info *resolveImage, Elf64_Rela *rel, int relLength)
#endif
{
for (int i = 0; i < relLength / (int)sizeof(Elf64_Rela); i++) {
int type = ELF64_R_TYPE(rel[i].r_info);
int symIndex = ELF64_R_SYM(rel[i].r_info);
Elf64_Addr symAddr = 0;
// Resolve the symbol, if any.
if (symIndex != 0) {
Elf64_Sym* symbol = SYMBOL(image, symIndex);
status_t status;
#ifdef _BOOT_MODE
status = boot_elf_resolve_symbol(image, symbol, &symAddr);
#else
status = elf_resolve_symbol(image, symbol, resolveImage, &symAddr);
#endif
if (status < B_OK)
return status;
}
// Address of the relocation.
Elf64_Addr relocAddr = image->text_region.delta + rel[i].r_offset;
// Calculate the relocation value.
Elf64_Addr relocValue;
switch (type) {
case R_X86_64_NONE:
continue;
case R_X86_64_64:
relocValue = symAddr + rel[i].r_addend;
break;
case R_X86_64_PC32:
relocValue = symAddr + rel[i].r_addend - rel[i].r_offset;
break;
case R_X86_64_GLOB_DAT:
case R_X86_64_JUMP_SLOT:
relocValue = symAddr + rel[i].r_addend;
break;
case R_X86_64_RELATIVE:
relocValue = image->text_region.delta + rel[i].r_addend;
break;
default:
dprintf("arch_elf_relocate_rela: unhandled relocation type %d\n",
type);
return B_BAD_DATA;
}
#ifdef _BOOT_MODE
boot_elf64_set_relocation(relocAddr, relocValue);
#else
if (!is_in_image(image, relocAddr)) {
dprintf("arch_elf_relocate_rela: invalid offset %#lx\n",
rel[i].r_offset);
return B_BAD_ADDRESS;
}
if (type == R_X86_64_PC32)
*(Elf32_Addr *)relocAddr = relocValue;
else
*(Elf64_Addr *)relocAddr = relocValue;
#endif
}
return B_OK;
}
