| #include <string.h> |
| #include <elf.h> |
| |
| #define LDSO_ARCH "powerpc" |
| |
| #define IS_COPY(x) ((x)==R_PPC_COPY) |
| #define IS_PLT(x) ((x)==R_PPC_JMP_SLOT) |
| |
| // see linux' arch/powerpc/include/asm/elf.h |
| static inline void do_single_reloc( |
| struct dso *self, unsigned char *base_addr, |
| size_t *reloc_addr, int type, size_t addend, |
| Sym *sym, size_t sym_size, |
| struct symdef def, size_t sym_val) |
| { |
| switch(type) { |
| case R_PPC_GLOB_DAT: |
| case R_PPC_JMP_SLOT: |
| case R_PPC_ADDR32: |
| *reloc_addr = sym_val + addend; |
| break; |
| case R_PPC_COPY: |
| memcpy(reloc_addr, (void *)sym_val, sym_size); |
| break; |
| case R_PPC_RELATIVE: |
| *reloc_addr = (size_t)base_addr + addend; |
| break; |
| case R_PPC_DTPMOD32: |
| *reloc_addr = def.dso ? def.dso->tls_id : self->tls_id; |
| break; |
| case R_PPC_DTPREL32: |
| *reloc_addr = def.sym->st_value + addend; |
| break; |
| case R_PPC_TPREL32: |
| *reloc_addr += def.sym |
| ? def.sym->st_value + def.dso->tls_offset - 0x7000 |
| : self->tls_offset - 0x7000; |
| break; |
| } |
| } |
| |
| void __reloc_self(int c, size_t *a, size_t *dynv) |
| { |
| char *base; |
| size_t t[20], n; |
| for (a+=c+1; *a; a++); |
| for (a++; *a; a+=2) if (*a<20) t[*a] = a[1]; |
| base = (char *)t[AT_BASE]; |
| if (!base) base = (char *)(t[AT_PHDR] & -t[AT_PAGESZ]); |
| for (a=dynv; *a; a+=2) if (*a<20) t[*a] = a[1]; |
| n = t[DT_RELASZ]; |
| for (a=(void *)(base+t[DT_RELA]); n; a+=3, n-=12) |
| if (a[1]%256 == R_PPC_RELATIVE) |
| *(size_t *)(base+a[0]) = (size_t)base + a[2]; |
| } |