diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/reloc.h | 56 |
1 files changed, 53 insertions, 3 deletions
diff --git a/arch/mips/reloc.h b/arch/mips/reloc.h index 76df112a..853c8b85 100644 --- a/arch/mips/reloc.h +++ b/arch/mips/reloc.h @@ -4,7 +4,7 @@ #define ETC_LDSO_PATH "/etc/ld-musl-mips.path" #define IS_COPY(x) ((x)==R_MIPS_COPY) -#define IS_PLT(x) ((x)==R_MIPS_JUMP_SLOT) +#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) { @@ -13,11 +13,61 @@ static inline void do_single_reloc(size_t *reloc_addr, int type, size_t sym_val, *reloc_addr = sym_val; break; case R_MIPS_REL32: - // FIXME: how do symbolic relocs come in here ? - *reloc_addr += (size_t)base_addr; + 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(unsigned char *base, size_t *rel, size_t rel_size, size_t stride, Sym *syms, char *strings, struct dso *dso); + +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(base, rel, sizeof rel, 2, this->syms, this->strings, head); + } +} + +#define NEED_ARCH_RELOCS 1 +#define DYNAMIC_IS_RO 1 |