| #include <string.h> |
| #include <elf.h> |
| |
| #define ETC_LDSO_PATH "/etc/ld-musl-mips.path" |
| |
| #define IS_COPY(x) ((x)==R_MIPS_COPY) |
| #define IS_PLT(x) 1 |
| |
| static inline void do_single_reloc(size_t *reloc_addr, int type, size_t sym_val, size_t sym_size, unsigned char *base_addr, size_t addend) |
| { |
| switch(type) { |
| case R_MIPS_JUMP_SLOT: |
| *reloc_addr = sym_val; |
| break; |
| case R_MIPS_REL32: |
| if (sym_val) *reloc_addr += sym_val; |
| else *reloc_addr += (size_t)base_addr; |
| break; |
| case R_MIPS_COPY: |
| memcpy(reloc_addr, (void *)sym_val, sym_size); |
| break; |
| } |
| } |
| |
| void __reloc_self(int c, size_t *a, size_t *dynv, size_t *got) |
| { |
| 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] & -4096); |
| for (a=dynv; *a; a+=2) if (*a-0x70000000UL<20) t[*a&31] = a[1]; |
| n = t[DT_MIPS_LOCAL_GOTNO - 0x70000000]; |
| for (a=got; n; a++, n--) *a += (size_t)base; |
| } |
| |
| static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stride); |
| |
| static void do_arch_relocs(struct dso *this, struct dso *head) |
| { |
| unsigned char *base = this->base; |
| size_t *dynv = this->dynv; |
| size_t dyn[20] = {0}; |
| size_t i; |
| size_t rel[2], got=0; |
| Sym *sym; |
| |
| for (i=0; dynv[i]; i+=2) { |
| if (dynv[i]-0x70000000UL<20) |
| dyn[dynv[i]&31] = dynv[i+1]; |
| else if (dynv[i] == DT_PLTGOT) |
| got = dynv[i+1]; |
| } |
| i = dyn[DT_MIPS_LOCAL_GOTNO-0x70000000]; |
| if (this->shortname && !strcmp(this->shortname, "libc.so")) { |
| got += sizeof(size_t) * i; |
| } else { |
| for (; i; i--, got+=sizeof(size_t)) |
| *(size_t *)(base+got) += (size_t)base; |
| } |
| sym = this->syms + dyn[DT_MIPS_GOTSYM-0x70000000]; |
| i = dyn[DT_MIPS_SYMTABNO-0x70000000] - dyn[DT_MIPS_GOTSYM-0x70000000]; |
| for (; i; i--, got+=sizeof(size_t), sym++) { |
| rel[0] = got; |
| rel[1] = sym-this->syms << 8 | R_MIPS_JUMP_SLOT; |
| *(size_t *)(base+got) = 0; |
| do_relocs(this, rel, sizeof rel, 2); |
| } |
| } |
| |
| #define NEED_ARCH_RELOCS 1 |
| #define DYNAMIC_IS_RO 1 |