diff options
Diffstat (limited to 'dyngen.c')
| -rw-r--r-- | dyngen.c | 92 |
1 files changed, 92 insertions, 0 deletions
@@ -117,6 +117,13 @@ #define elf_check_arch(x) ((x) == EM_68K) #define ELF_USES_RELOCA +#elif defined(HOST_MIPS) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_MIPS +#define elf_check_arch(x) ((x) == EM_MIPS) +#define ELF_USES_RELOC + #else #error unsupported CPU - please update the code #endif @@ -1641,6 +1648,26 @@ void gen_code(const char *name, host_ulong offset, host_ulong size, error("rts expected at the end of %s", name); copy_size = p - p_start; } +#elif defined(HOST_MIPS) + { +#define INSN_RETURN 0x03e00008 +#define INSN_NOP 0x00000000 + + uint8_t *p = p_end; + + if (p < (p_start + 0x8)) { + error("empty code for %s", name); + } else { + uint32_t end_insn1, end_insn2; + + p -= 0x8; + end_insn1 = get32((uint32_t *)(p + 0x0)); + end_insn2 = get32((uint32_t *)(p + 0x4)); + if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP) + error("jr ra not found at end of %s", name); + } + copy_size = p - p_start; + } #else #error unsupported CPU #endif @@ -2483,6 +2510,71 @@ void gen_code(const char *name, host_ulong offset, host_ulong size, } } } +#elif defined(HOST_MIPS) + { + for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { + if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) { + char name[256]; + int type; + int addend; + int reloc_offset; + + sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; + /* the compiler leave some unnecessary references to the code */ + if (sym_name[0] == '\0') + continue; + get_reloc_expr(name, sizeof(name), sym_name); + type = ELF32_R_TYPE(rel->r_info); + addend = get32((uint32_t *)(text + rel->r_offset)); + reloc_offset = rel->r_offset - start_offset; + switch (type) { + case R_MIPS_HI16: + fprintf(outfile, " /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n", + rel->r_offset, sym_name); + fprintf(outfile, + " *(uint32_t *)(gen_code_ptr + 0x%x) = " + "((*(uint32_t *)(gen_code_ptr + 0x%x)) " + " & ~0xffff) " + " | (((%s - 0x8000) >> 16) & 0xffff);\n", + reloc_offset, reloc_offset, name); + break; + case R_MIPS_LO16: + fprintf(outfile, " /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n", + rel->r_offset, sym_name); + fprintf(outfile, + " *(uint32_t *)(gen_code_ptr + 0x%x) = " + "((*(uint32_t *)(gen_code_ptr + 0x%x)) " + " & ~0xffff) " + " | (%s & 0xffff);\n", + reloc_offset, reloc_offset, name); + break; + case R_MIPS_PC16: + fprintf(outfile, " /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n", + rel->r_offset, sym_name); + fprintf(outfile, + " *(uint32_t *)(gen_code_ptr + 0x%x) = " + "(0x%x & ~0xffff) " + "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) " + " & 0xffff);\n", + reloc_offset, addend, addend, name, reloc_offset); + break; + case R_MIPS_GOT16: + case R_MIPS_CALL16: + fprintf(outfile, " /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n", + rel->r_offset, sym_name); + fprintf(outfile, + " *(uint32_t *)(gen_code_ptr + 0x%x) = " + "((*(uint32_t *)(gen_code_ptr + 0x%x)) " + " & ~0xffff) " + " | (((%s - 0x8000) >> 16) & 0xffff);\n", + reloc_offset, reloc_offset, name); + break; + default: + error("unsupported MIPS relocation (%d)", type); + } + } + } + } #else #error unsupported CPU #endif |