dynamic linker bootstrap overhaul

[musl] / arch / mips / reloc.h

diff --git a/arch/mips/reloc.h b/arch/mips/reloc.h
index e892526..8aa0285 100644 (file)
--- a/arch/mips/reloc.h
+++ b/arch/mips/reloc.h
@@ -1,73 +1,31 @@
-#include <string.h>
-#include <elf.h>
+#include <endian.h>
 
-#define ETC_LDSO_PATH "/etc/ld-musl-mips.path"
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define ENDIAN_SUFFIX "el"
+#else
+#define ENDIAN_SUFFIX ""
+#endif
 
-#define IS_COPY(x) ((x)==R_MIPS_COPY)
-#define IS_PLT(x) 1
+#ifdef __mips_soft_float
+#define FP_SUFFIX "-sf"
+#else
+#define FP_SUFFIX ""
+#endif
 
-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;
-       }
-}
+#define LDSO_ARCH "mips" ENDIAN_SUFFIX FP_SUFFIX
 
-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;
-}
+#define TPOFF_K (-0x7000)
 
-static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stride);
+#define REL_SYM_OR_REL  R_MIPS_REL32
+#define REL_PLT         R_MIPS_JUMP_SLOT
+#define REL_COPY        R_MIPS_COPY
+#define REL_DTPMOD      R_MIPS_TLS_DTPMOD32
+#define REL_DTPOFF      R_MIPS_TLS_DTPREL32
+#define REL_TPOFF       R_MIPS_TLS_TPREL32
 
-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 NEED_MIPS_GOT_RELOCS 1
 #define DYNAMIC_IS_RO 1
+#define ARCH_SYM_REJECT_UND(s) (!((s)->st_other & STO_MIPS_PLT))
+
+#define CRTJMP(pc,sp) __asm__ __volatile__( \
+       "move $sp,%1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )