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/*
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* Generic Dynamic compiler generator
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include "config.h" |
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|
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/* elf format definitions. We use these macros to test the CPU to
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allow cross compilation (this tool must be ran on the build
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platform) */
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#if defined(HOST_I386)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_386
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#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
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#undef ELF_USES_RELOCA
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#elif defined(HOST_PPC)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_PPC
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#define elf_check_arch(x) ((x) == EM_PPC)
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#define ELF_USES_RELOCA
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#elif defined(HOST_S390)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_S390
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#define elf_check_arch(x) ((x) == EM_S390)
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#define ELF_USES_RELOCA
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#elif defined(HOST_ALPHA)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_ALPHA
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#define elf_check_arch(x) ((x) == EM_ALPHA)
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#define ELF_USES_RELOCA
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#elif defined(HOST_IA64)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_IA_64
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#define elf_check_arch(x) ((x) == EM_IA_64)
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#define ELF_USES_RELOCA
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#elif defined(HOST_SPARC)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_SPARC
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#define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
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#define ELF_USES_RELOCA
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#elif defined(HOST_SPARC64)
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#define ELF_CLASS ELFCLASS64
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#define ELF_ARCH EM_SPARCV9
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#define elf_check_arch(x) ((x) == EM_SPARCV9)
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#define ELF_USES_RELOCA
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#elif defined(HOST_ARM)
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#define ELF_CLASS ELFCLASS32
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#define ELF_ARCH EM_ARM
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#define elf_check_arch(x) ((x) == EM_ARM)
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#define ELF_USES_RELOC
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#else
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#error unsupported CPU - please update the code
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#endif
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#include "elf.h" |
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#if ELF_CLASS == ELFCLASS32
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typedef int32_t host_long;
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typedef uint32_t host_ulong;
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#define swabls(x) swab32s(x)
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#else
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typedef int64_t host_long;
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typedef uint64_t host_ulong;
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#define swabls(x) swab64s(x)
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#endif
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#ifdef ELF_USES_RELOCA
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#define SHT_RELOC SHT_RELA
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#else
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#define SHT_RELOC SHT_REL
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#endif
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#define NO_THUNK_TYPE_SIZE
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#include "thunk.h" |
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enum {
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OUT_GEN_OP, |
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OUT_CODE, |
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OUT_INDEX_OP, |
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}; |
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/* all dynamically generated functions begin with this code */
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#define OP_PREFIX "op_" |
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|
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int elf_must_swap(struct elfhdr *h) |
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{
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union {
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uint32_t i; |
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uint8_t b[4];
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} swaptest; |
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swaptest.i = 1;
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return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
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(swaptest.b[0] == 0); |
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} |
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|
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void swab16s(uint16_t *p)
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{
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*p = bswap16(*p); |
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} |
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void swab32s(uint32_t *p)
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{
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*p = bswap32(*p); |
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} |
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void swab64s(uint64_t *p)
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{
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*p = bswap64(*p); |
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} |
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void elf_swap_ehdr(struct elfhdr *h) |
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{
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swab16s(&h->e_type); /* Object file type */
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swab16s(&h-> e_machine); /* Architecture */
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swab32s(&h-> e_version); /* Object file version */
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swabls(&h-> e_entry); /* Entry point virtual address */
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swabls(&h-> e_phoff); /* Program header table file offset */
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swabls(&h-> e_shoff); /* Section header table file offset */
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swab32s(&h-> e_flags); /* Processor-specific flags */
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swab16s(&h-> e_ehsize); /* ELF header size in bytes */
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swab16s(&h-> e_phentsize); /* Program header table entry size */
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swab16s(&h-> e_phnum); /* Program header table entry count */
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swab16s(&h-> e_shentsize); /* Section header table entry size */
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swab16s(&h-> e_shnum); /* Section header table entry count */
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swab16s(&h-> e_shstrndx); /* Section header string table index */
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} |
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void elf_swap_shdr(struct elf_shdr *h) |
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{
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swab32s(&h-> sh_name); /* Section name (string tbl index) */
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swab32s(&h-> sh_type); /* Section type */
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swabls(&h-> sh_flags); /* Section flags */
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swabls(&h-> sh_addr); /* Section virtual addr at execution */
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swabls(&h-> sh_offset); /* Section file offset */
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swabls(&h-> sh_size); /* Section size in bytes */
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swab32s(&h-> sh_link); /* Link to another section */
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swab32s(&h-> sh_info); /* Additional section information */
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swabls(&h-> sh_addralign); /* Section alignment */
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swabls(&h-> sh_entsize); /* Entry size if section holds table */
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} |
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void elf_swap_phdr(struct elf_phdr *h) |
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{
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swab32s(&h->p_type); /* Segment type */
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swabls(&h->p_offset); /* Segment file offset */
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swabls(&h->p_vaddr); /* Segment virtual address */
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swabls(&h->p_paddr); /* Segment physical address */
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swabls(&h->p_filesz); /* Segment size in file */
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swabls(&h->p_memsz); /* Segment size in memory */
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swab32s(&h->p_flags); /* Segment flags */
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swabls(&h->p_align); /* Segment alignment */
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} |
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void elf_swap_rel(ELF_RELOC *rel)
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{
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swabls(&rel->r_offset); |
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swabls(&rel->r_info); |
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#ifdef ELF_USES_RELOCA
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swabls(&rel->r_addend); |
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#endif
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} |
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/* ELF file info */
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int do_swap;
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struct elf_shdr *shdr;
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uint8_t **sdata; |
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struct elfhdr ehdr;
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ElfW(Sym) *symtab; |
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int nb_syms;
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char *strtab;
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int text_shndx;
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uint16_t get16(uint16_t *p) |
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{
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uint16_t val; |
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val = *p; |
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if (do_swap)
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val = bswap16(val); |
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return val;
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} |
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|
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uint32_t get32(uint32_t *p) |
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{
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uint32_t val; |
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val = *p; |
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if (do_swap)
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val = bswap32(val); |
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return val;
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} |
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void put16(uint16_t *p, uint16_t val)
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{
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if (do_swap)
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val = bswap16(val); |
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*p = val; |
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} |
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void put32(uint32_t *p, uint32_t val)
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{
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if (do_swap)
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val = bswap32(val); |
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*p = val; |
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} |
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void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...) |
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{
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va_list ap; |
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va_start(ap, fmt); |
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fprintf(stderr, "dyngen: ");
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vfprintf(stderr, fmt, ap); |
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fprintf(stderr, "\n");
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va_end(ap); |
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exit(1);
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} |
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|
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|
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struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr, |
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const char *name) |
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{
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int i;
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const char *shname; |
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struct elf_shdr *sec;
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|
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for(i = 0; i < shnum; i++) { |
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sec = &shdr[i]; |
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if (!sec->sh_name)
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continue;
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shname = shstr + sec->sh_name; |
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if (!strcmp(shname, name))
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return sec;
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} |
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return NULL; |
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} |
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|
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int find_reloc(int sh_index) |
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{
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struct elf_shdr *sec;
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int i;
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|
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for(i = 0; i < ehdr.e_shnum; i++) { |
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sec = &shdr[i]; |
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if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
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return i;
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} |
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return 0; |
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} |
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|
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void *load_data(int fd, long offset, unsigned int size) |
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{
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char *data;
|
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|
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data = malloc(size); |
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if (!data)
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return NULL; |
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lseek(fd, offset, SEEK_SET); |
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if (read(fd, data, size) != size) {
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free(data); |
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return NULL; |
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} |
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return data;
|
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} |
| 301 |
|
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int strstart(const char *str, const char *val, const char **ptr) |
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{
|
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const char *p, *q; |
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p = str; |
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q = val; |
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while (*q != '\0') { |
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if (*p != *q)
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return 0; |
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p++; |
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q++; |
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} |
| 313 |
if (ptr)
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*ptr = p; |
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return 1; |
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} |
| 317 |
|
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#ifdef HOST_ARM
|
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|
| 320 |
int arm_emit_ldr_info(const char *name, unsigned long start_offset, |
| 321 |
FILE *outfile, uint8_t *p_start, uint8_t *p_end, |
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ELF_RELOC *relocs, int nb_relocs)
|
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{
|
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uint8_t *p; |
| 325 |
uint32_t insn; |
| 326 |
int offset, min_offset, pc_offset, data_size;
|
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uint8_t data_allocated[1024];
|
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unsigned int data_index; |
| 329 |
|
| 330 |
memset(data_allocated, 0, sizeof(data_allocated)); |
| 331 |
|
| 332 |
p = p_start; |
| 333 |
min_offset = p_end - p_start; |
| 334 |
while (p < p_start + min_offset) {
|
| 335 |
insn = get32((uint32_t *)p); |
| 336 |
if ((insn & 0x0d5f0000) == 0x051f0000) { |
| 337 |
/* ldr reg, [pc, #im] */
|
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offset = insn & 0xfff;
|
| 339 |
if (!(insn & 0x00800000)) |
| 340 |
offset = -offset; |
| 341 |
if ((offset & 3) !=0) |
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error("%s:%04x: ldr pc offset must be 32 bit aligned",
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name, start_offset + p - p_start); |
| 344 |
pc_offset = p - p_start + offset + 8;
|
| 345 |
if (pc_offset <= (p - p_start) ||
|
| 346 |
pc_offset >= (p_end - p_start)) |
| 347 |
error("%s:%04x: ldr pc offset must point inside the function code",
|
| 348 |
name, start_offset + p - p_start); |
| 349 |
if (pc_offset < min_offset)
|
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min_offset = pc_offset; |
| 351 |
if (outfile) {
|
| 352 |
/* ldr position */
|
| 353 |
fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
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p - p_start); |
| 355 |
/* ldr data index */
|
| 356 |
data_index = ((p_end - p_start) - pc_offset - 4) >> 2; |
| 357 |
fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
|
| 358 |
data_index); |
| 359 |
fprintf(outfile, " arm_ldr_ptr++;\n");
|
| 360 |
if (data_index >= sizeof(data_allocated)) |
| 361 |
error("%s: too many data", name);
|
| 362 |
if (!data_allocated[data_index]) {
|
| 363 |
ELF_RELOC *rel; |
| 364 |
int i, addend, type;
|
| 365 |
const char *sym_name, *p; |
| 366 |
char relname[1024]; |
| 367 |
|
| 368 |
data_allocated[data_index] = 1;
|
| 369 |
|
| 370 |
/* data value */
|
| 371 |
addend = get32((uint32_t *)(p_start + pc_offset)); |
| 372 |
relname[0] = '\0'; |
| 373 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 374 |
if (rel->r_offset == (pc_offset + start_offset)) {
|
| 375 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 376 |
/* the compiler leave some unnecessary references to the code */
|
| 377 |
if (strstart(sym_name, "__op_param", &p)) { |
| 378 |
snprintf(relname, sizeof(relname), "param%s", p); |
| 379 |
} else {
|
| 380 |
snprintf(relname, sizeof(relname), "(long)(&%s)", sym_name); |
| 381 |
} |
| 382 |
type = ELF32_R_TYPE(rel->r_info); |
| 383 |
if (type != R_ARM_ABS32)
|
| 384 |
error("%s: unsupported data relocation", name);
|
| 385 |
break;
|
| 386 |
} |
| 387 |
} |
| 388 |
fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
|
| 389 |
data_index, addend); |
| 390 |
if (relname[0] != '\0') |
| 391 |
fprintf(outfile, " + %s", relname);
|
| 392 |
fprintf(outfile, ";\n");
|
| 393 |
} |
| 394 |
} |
| 395 |
} |
| 396 |
p += 4;
|
| 397 |
} |
| 398 |
data_size = (p_end - p_start) - min_offset; |
| 399 |
if (data_size > 0 && outfile) { |
| 400 |
fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2); |
| 401 |
} |
| 402 |
|
| 403 |
/* the last instruction must be a mov pc, lr */
|
| 404 |
if (p == p_start)
|
| 405 |
goto arm_ret_error;
|
| 406 |
p -= 4;
|
| 407 |
insn = get32((uint32_t *)p); |
| 408 |
if ((insn & 0xffff0000) != 0xe91b0000) { |
| 409 |
arm_ret_error:
|
| 410 |
if (!outfile)
|
| 411 |
printf("%s: invalid epilog\n", name);
|
| 412 |
} |
| 413 |
return p - p_start;
|
| 414 |
} |
| 415 |
#endif
|
| 416 |
|
| 417 |
|
| 418 |
#define MAX_ARGS 3 |
| 419 |
|
| 420 |
/* generate op code */
|
| 421 |
void gen_code(const char *name, host_ulong offset, host_ulong size, |
| 422 |
FILE *outfile, uint8_t *text, ELF_RELOC *relocs, int nb_relocs,
|
| 423 |
int gen_switch)
|
| 424 |
{
|
| 425 |
int copy_size = 0; |
| 426 |
uint8_t *p_start, *p_end; |
| 427 |
host_ulong start_offset; |
| 428 |
int nb_args, i, n;
|
| 429 |
uint8_t args_present[MAX_ARGS]; |
| 430 |
const char *sym_name, *p; |
| 431 |
ELF_RELOC *rel; |
| 432 |
|
| 433 |
/* Compute exact size excluding prologue and epilogue instructions.
|
| 434 |
* Increment start_offset to skip epilogue instructions, then compute
|
| 435 |
* copy_size the indicate the size of the remaining instructions (in
|
| 436 |
* bytes).
|
| 437 |
*/
|
| 438 |
p_start = text + offset; |
| 439 |
p_end = p_start + size; |
| 440 |
start_offset = offset; |
| 441 |
switch(ELF_ARCH) {
|
| 442 |
case EM_386:
|
| 443 |
{
|
| 444 |
int len;
|
| 445 |
len = p_end - p_start; |
| 446 |
if (len == 0) |
| 447 |
error("empty code for %s", name);
|
| 448 |
if (p_end[-1] == 0xc3) { |
| 449 |
len--; |
| 450 |
} else {
|
| 451 |
error("ret or jmp expected at the end of %s", name);
|
| 452 |
} |
| 453 |
copy_size = len; |
| 454 |
} |
| 455 |
break;
|
| 456 |
case EM_PPC:
|
| 457 |
{
|
| 458 |
uint8_t *p; |
| 459 |
p = (void *)(p_end - 4); |
| 460 |
if (p == p_start)
|
| 461 |
error("empty code for %s", name);
|
| 462 |
if (get32((uint32_t *)p) != 0x4e800020) |
| 463 |
error("blr expected at the end of %s", name);
|
| 464 |
copy_size = p - p_start; |
| 465 |
} |
| 466 |
break;
|
| 467 |
case EM_S390:
|
| 468 |
{
|
| 469 |
uint8_t *p; |
| 470 |
p = (void *)(p_end - 2); |
| 471 |
if (p == p_start)
|
| 472 |
error("empty code for %s", name);
|
| 473 |
if (get16((uint16_t *)p) != 0x07fe && get16((uint16_t *)p) != 0x07f4) |
| 474 |
error("br %%r14 expected at the end of %s", name);
|
| 475 |
copy_size = p - p_start; |
| 476 |
} |
| 477 |
break;
|
| 478 |
case EM_ALPHA:
|
| 479 |
{
|
| 480 |
uint8_t *p; |
| 481 |
p = p_end - 4;
|
| 482 |
if (p == p_start)
|
| 483 |
error("empty code for %s", name);
|
| 484 |
if (get32((uint32_t *)p) != 0x6bfa8001) |
| 485 |
error("ret expected at the end of %s", name);
|
| 486 |
copy_size = p - p_start; |
| 487 |
} |
| 488 |
break;
|
| 489 |
case EM_IA_64:
|
| 490 |
{
|
| 491 |
uint8_t *p; |
| 492 |
p = (void *)(p_end - 4); |
| 493 |
if (p == p_start)
|
| 494 |
error("empty code for %s", name);
|
| 495 |
/* br.ret.sptk.many b0;; */
|
| 496 |
/* 08 00 84 00 */
|
| 497 |
if (get32((uint32_t *)p) != 0x00840008) |
| 498 |
error("br.ret.sptk.many b0;; expected at the end of %s", name);
|
| 499 |
copy_size = p - p_start; |
| 500 |
} |
| 501 |
break;
|
| 502 |
case EM_SPARC:
|
| 503 |
case EM_SPARC32PLUS:
|
| 504 |
{
|
| 505 |
uint32_t start_insn, end_insn1, end_insn2; |
| 506 |
uint8_t *p; |
| 507 |
p = (void *)(p_end - 8); |
| 508 |
if (p <= p_start)
|
| 509 |
error("empty code for %s", name);
|
| 510 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
| 511 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
| 512 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
| 513 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
| 514 |
p_start += 0x4;
|
| 515 |
start_offset += 0x4;
|
| 516 |
if ((int)(start_insn | ~0x1fff) < -128) |
| 517 |
error("Found bogus save at the start of %s", name);
|
| 518 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
| 519 |
error("ret; restore; not found at end of %s", name);
|
| 520 |
} else {
|
| 521 |
error("No save at the beginning of %s", name);
|
| 522 |
} |
| 523 |
#if 0
|
| 524 |
/* Skip a preceeding nop, if present. */
|
| 525 |
if (p > p_start) {
|
| 526 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
| 527 |
if (skip_insn == 0x01000000)
|
| 528 |
p -= 4;
|
| 529 |
}
|
| 530 |
#endif
|
| 531 |
copy_size = p - p_start; |
| 532 |
} |
| 533 |
break;
|
| 534 |
case EM_SPARCV9:
|
| 535 |
{
|
| 536 |
uint32_t start_insn, end_insn1, end_insn2, skip_insn; |
| 537 |
uint8_t *p; |
| 538 |
p = (void *)(p_end - 8); |
| 539 |
if (p <= p_start)
|
| 540 |
error("empty code for %s", name);
|
| 541 |
start_insn = get32((uint32_t *)(p_start + 0x0));
|
| 542 |
end_insn1 = get32((uint32_t *)(p + 0x0));
|
| 543 |
end_insn2 = get32((uint32_t *)(p + 0x4));
|
| 544 |
if ((start_insn & ~0x1fff) == 0x9de3a000) { |
| 545 |
p_start += 0x4;
|
| 546 |
start_offset += 0x4;
|
| 547 |
if ((int)(start_insn | ~0x1fff) < -256) |
| 548 |
error("Found bogus save at the start of %s", name);
|
| 549 |
if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000) |
| 550 |
error("ret; restore; not found at end of %s", name);
|
| 551 |
} else {
|
| 552 |
error("No save at the beginning of %s", name);
|
| 553 |
} |
| 554 |
|
| 555 |
/* Skip a preceeding nop, if present. */
|
| 556 |
if (p > p_start) {
|
| 557 |
skip_insn = get32((uint32_t *)(p - 0x4));
|
| 558 |
if (skip_insn == 0x01000000) |
| 559 |
p -= 4;
|
| 560 |
} |
| 561 |
|
| 562 |
copy_size = p - p_start; |
| 563 |
} |
| 564 |
break;
|
| 565 |
#ifdef HOST_ARM
|
| 566 |
case EM_ARM:
|
| 567 |
if ((p_end - p_start) <= 16) |
| 568 |
error("%s: function too small", name);
|
| 569 |
if (get32((uint32_t *)p_start) != 0xe1a0c00d || |
| 570 |
(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 || |
| 571 |
get32((uint32_t *)(p_start + 8)) != 0xe24cb004) |
| 572 |
error("%s: invalid prolog", name);
|
| 573 |
p_start += 12;
|
| 574 |
start_offset += 12;
|
| 575 |
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
|
| 576 |
relocs, nb_relocs); |
| 577 |
break;
|
| 578 |
#endif
|
| 579 |
default:
|
| 580 |
error("unknown ELF architecture");
|
| 581 |
} |
| 582 |
|
| 583 |
/* compute the number of arguments by looking at the relocations */
|
| 584 |
for(i = 0;i < MAX_ARGS; i++) |
| 585 |
args_present[i] = 0;
|
| 586 |
|
| 587 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 588 |
if (rel->r_offset >= start_offset &&
|
| 589 |
rel->r_offset < start_offset + (p_end - p_start)) {
|
| 590 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 591 |
if (strstart(sym_name, "__op_param", &p)) { |
| 592 |
n = strtoul(p, NULL, 10); |
| 593 |
if (n > MAX_ARGS)
|
| 594 |
error("too many arguments in %s", name);
|
| 595 |
args_present[n - 1] = 1; |
| 596 |
} |
| 597 |
} |
| 598 |
} |
| 599 |
|
| 600 |
nb_args = 0;
|
| 601 |
while (nb_args < MAX_ARGS && args_present[nb_args])
|
| 602 |
nb_args++; |
| 603 |
for(i = nb_args; i < MAX_ARGS; i++) {
|
| 604 |
if (args_present[i])
|
| 605 |
error("inconsistent argument numbering in %s", name);
|
| 606 |
} |
| 607 |
|
| 608 |
if (gen_switch == 2) { |
| 609 |
fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size); |
| 610 |
} else if (gen_switch == 1) { |
| 611 |
|
| 612 |
/* output C code */
|
| 613 |
fprintf(outfile, "case INDEX_%s: {\n", name);
|
| 614 |
if (nb_args > 0) { |
| 615 |
fprintf(outfile, " long ");
|
| 616 |
for(i = 0; i < nb_args; i++) { |
| 617 |
if (i != 0) |
| 618 |
fprintf(outfile, ", ");
|
| 619 |
fprintf(outfile, "param%d", i + 1); |
| 620 |
} |
| 621 |
fprintf(outfile, ";\n");
|
| 622 |
} |
| 623 |
fprintf(outfile, " extern void %s();\n", name);
|
| 624 |
|
| 625 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 626 |
if (rel->r_offset >= start_offset &&
|
| 627 |
rel->r_offset < start_offset + (p_end - p_start)) {
|
| 628 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 629 |
if (*sym_name &&
|
| 630 |
!strstart(sym_name, "__op_param", NULL) && |
| 631 |
!strstart(sym_name, "__op_jmp", NULL)) { |
| 632 |
#if defined(HOST_SPARC)
|
| 633 |
if (sym_name[0] == '.') { |
| 634 |
fprintf(outfile, |
| 635 |
"extern char __dot_%s __asm__(\"%s\");\n",
|
| 636 |
sym_name+1, sym_name);
|
| 637 |
continue;
|
| 638 |
} |
| 639 |
#endif
|
| 640 |
fprintf(outfile, "extern char %s;\n", sym_name);
|
| 641 |
} |
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
|
| 646 |
|
| 647 |
/* emit code offset information */
|
| 648 |
{
|
| 649 |
ElfW(Sym) *sym; |
| 650 |
const char *sym_name, *p; |
| 651 |
target_ulong val; |
| 652 |
int n;
|
| 653 |
|
| 654 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| 655 |
sym_name = strtab + sym->st_name; |
| 656 |
if (strstart(sym_name, "__op_label", &p)) { |
| 657 |
uint8_t *ptr; |
| 658 |
unsigned long offset; |
| 659 |
|
| 660 |
/* test if the variable refers to a label inside
|
| 661 |
the code we are generating */
|
| 662 |
ptr = sdata[sym->st_shndx]; |
| 663 |
if (!ptr)
|
| 664 |
error("__op_labelN in invalid section");
|
| 665 |
offset = sym->st_value; |
| 666 |
val = *(target_ulong *)(ptr + offset); |
| 667 |
#ifdef ELF_USES_RELOCA
|
| 668 |
{
|
| 669 |
int reloc_shndx, nb_relocs1, j;
|
| 670 |
|
| 671 |
/* try to find a matching relocation */
|
| 672 |
reloc_shndx = find_reloc(sym->st_shndx); |
| 673 |
if (reloc_shndx) {
|
| 674 |
nb_relocs1 = shdr[reloc_shndx].sh_size / |
| 675 |
shdr[reloc_shndx].sh_entsize; |
| 676 |
rel = (ELF_RELOC *)sdata[reloc_shndx]; |
| 677 |
for(j = 0; j < nb_relocs1; j++) { |
| 678 |
if (rel->r_offset == offset) {
|
| 679 |
val = rel->r_addend; |
| 680 |
break;
|
| 681 |
} |
| 682 |
rel++; |
| 683 |
} |
| 684 |
} |
| 685 |
} |
| 686 |
#endif
|
| 687 |
|
| 688 |
if (val >= start_offset && val < start_offset + copy_size) {
|
| 689 |
n = strtol(p, NULL, 10); |
| 690 |
fprintf(outfile, " label_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
|
| 691 |
} |
| 692 |
} |
| 693 |
} |
| 694 |
} |
| 695 |
|
| 696 |
/* load parameres in variables */
|
| 697 |
for(i = 0; i < nb_args; i++) { |
| 698 |
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1); |
| 699 |
} |
| 700 |
|
| 701 |
/* patch relocations */
|
| 702 |
#if defined(HOST_I386)
|
| 703 |
{
|
| 704 |
char name[256]; |
| 705 |
int type;
|
| 706 |
int addend;
|
| 707 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 708 |
if (rel->r_offset >= start_offset &&
|
| 709 |
rel->r_offset < start_offset + copy_size) {
|
| 710 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 711 |
if (strstart(sym_name, "__op_param", &p)) { |
| 712 |
snprintf(name, sizeof(name), "param%s", p); |
| 713 |
} else {
|
| 714 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 715 |
} |
| 716 |
type = ELF32_R_TYPE(rel->r_info); |
| 717 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
| 718 |
switch(type) {
|
| 719 |
case R_386_32:
|
| 720 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 721 |
rel->r_offset - start_offset, name, addend); |
| 722 |
break;
|
| 723 |
case R_386_PC32:
|
| 724 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
|
| 725 |
rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
| 726 |
break;
|
| 727 |
default:
|
| 728 |
error("unsupported i386 relocation (%d)", type);
|
| 729 |
} |
| 730 |
} |
| 731 |
} |
| 732 |
} |
| 733 |
#elif defined(HOST_PPC)
|
| 734 |
{
|
| 735 |
char name[256]; |
| 736 |
int type;
|
| 737 |
int addend;
|
| 738 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 739 |
if (rel->r_offset >= start_offset &&
|
| 740 |
rel->r_offset < start_offset + copy_size) {
|
| 741 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 742 |
if (strstart(sym_name, "__op_jmp", &p)) { |
| 743 |
int n;
|
| 744 |
n = strtol(p, NULL, 10); |
| 745 |
/* __op_jmp relocations are done at
|
| 746 |
runtime to do translated block
|
| 747 |
chaining: the offset of the instruction
|
| 748 |
needs to be stored */
|
| 749 |
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
| 750 |
n, rel->r_offset - start_offset); |
| 751 |
continue;
|
| 752 |
} |
| 753 |
|
| 754 |
if (strstart(sym_name, "__op_param", &p)) { |
| 755 |
snprintf(name, sizeof(name), "param%s", p); |
| 756 |
} else {
|
| 757 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 758 |
} |
| 759 |
type = ELF32_R_TYPE(rel->r_info); |
| 760 |
addend = rel->r_addend; |
| 761 |
switch(type) {
|
| 762 |
case R_PPC_ADDR32:
|
| 763 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 764 |
rel->r_offset - start_offset, name, addend); |
| 765 |
break;
|
| 766 |
case R_PPC_ADDR16_LO:
|
| 767 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
|
| 768 |
rel->r_offset - start_offset, name, addend); |
| 769 |
break;
|
| 770 |
case R_PPC_ADDR16_HI:
|
| 771 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
|
| 772 |
rel->r_offset - start_offset, name, addend); |
| 773 |
break;
|
| 774 |
case R_PPC_ADDR16_HA:
|
| 775 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
|
| 776 |
rel->r_offset - start_offset, name, addend); |
| 777 |
break;
|
| 778 |
case R_PPC_REL24:
|
| 779 |
/* warning: must be at 32 MB distancy */
|
| 780 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
|
| 781 |
rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend); |
| 782 |
break;
|
| 783 |
default:
|
| 784 |
error("unsupported powerpc relocation (%d)", type);
|
| 785 |
} |
| 786 |
} |
| 787 |
} |
| 788 |
} |
| 789 |
#elif defined(HOST_S390)
|
| 790 |
{
|
| 791 |
char name[256]; |
| 792 |
int type;
|
| 793 |
int addend;
|
| 794 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 795 |
if (rel->r_offset >= start_offset &&
|
| 796 |
rel->r_offset < start_offset + copy_size) {
|
| 797 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 798 |
if (strstart(sym_name, "__op_param", &p)) { |
| 799 |
snprintf(name, sizeof(name), "param%s", p); |
| 800 |
} else {
|
| 801 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 802 |
} |
| 803 |
type = ELF32_R_TYPE(rel->r_info); |
| 804 |
addend = rel->r_addend; |
| 805 |
switch(type) {
|
| 806 |
case R_390_32:
|
| 807 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 808 |
rel->r_offset - start_offset, name, addend); |
| 809 |
break;
|
| 810 |
case R_390_16:
|
| 811 |
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 812 |
rel->r_offset - start_offset, name, addend); |
| 813 |
break;
|
| 814 |
case R_390_8:
|
| 815 |
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 816 |
rel->r_offset - start_offset, name, addend); |
| 817 |
break;
|
| 818 |
default:
|
| 819 |
error("unsupported s390 relocation (%d)", type);
|
| 820 |
} |
| 821 |
} |
| 822 |
} |
| 823 |
} |
| 824 |
#elif defined(HOST_ALPHA)
|
| 825 |
{
|
| 826 |
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) { |
| 827 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
| 828 |
int type;
|
| 829 |
|
| 830 |
type = ELF64_R_TYPE(rel->r_info); |
| 831 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
| 832 |
switch (type) {
|
| 833 |
case R_ALPHA_GPDISP:
|
| 834 |
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
|
| 835 |
as an immediate instead of constructing it from the pv or ra. */
|
| 836 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
|
| 837 |
rel->r_offset - start_offset); |
| 838 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
|
| 839 |
rel->r_offset - start_offset + rel->r_addend); |
| 840 |
break;
|
| 841 |
case R_ALPHA_LITUSE:
|
| 842 |
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
|
| 843 |
now, since some called functions (libc) need pv to be set up. */
|
| 844 |
break;
|
| 845 |
case R_ALPHA_HINT:
|
| 846 |
/* Branch target prediction hint. Ignore for now. Should be already
|
| 847 |
correct for in-function jumps. */
|
| 848 |
break;
|
| 849 |
case R_ALPHA_LITERAL:
|
| 850 |
/* Load a literal from the GOT relative to the gp. Since there's only a
|
| 851 |
single gp, nothing is to be done. */
|
| 852 |
break;
|
| 853 |
case R_ALPHA_GPRELHIGH:
|
| 854 |
/* Handle fake relocations against __op_param symbol. Need to emit the
|
| 855 |
high part of the immediate value instead. Other symbols need no
|
| 856 |
special treatment. */
|
| 857 |
if (strstart(sym_name, "__op_param", &p)) |
| 858 |
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
|
| 859 |
rel->r_offset - start_offset, p); |
| 860 |
break;
|
| 861 |
case R_ALPHA_GPRELLOW:
|
| 862 |
if (strstart(sym_name, "__op_param", &p)) |
| 863 |
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
|
| 864 |
rel->r_offset - start_offset, p); |
| 865 |
break;
|
| 866 |
case R_ALPHA_BRSGP:
|
| 867 |
/* PC-relative jump. Tweak offset to skip the two instructions that try to
|
| 868 |
set up the gp from the pv. */
|
| 869 |
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
|
| 870 |
rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset); |
| 871 |
break;
|
| 872 |
default:
|
| 873 |
error("unsupported Alpha relocation (%d)", type);
|
| 874 |
} |
| 875 |
} |
| 876 |
} |
| 877 |
} |
| 878 |
#elif defined(HOST_IA64)
|
| 879 |
{
|
| 880 |
char name[256]; |
| 881 |
int type;
|
| 882 |
int addend;
|
| 883 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 884 |
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
|
| 885 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
| 886 |
if (strstart(sym_name, "__op_param", &p)) { |
| 887 |
snprintf(name, sizeof(name), "param%s", p); |
| 888 |
} else {
|
| 889 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 890 |
} |
| 891 |
type = ELF64_R_TYPE(rel->r_info); |
| 892 |
addend = rel->r_addend; |
| 893 |
switch(type) {
|
| 894 |
case R_IA64_LTOFF22:
|
| 895 |
error("must implemnt R_IA64_LTOFF22 relocation");
|
| 896 |
case R_IA64_PCREL21B:
|
| 897 |
error("must implemnt R_IA64_PCREL21B relocation");
|
| 898 |
default:
|
| 899 |
error("unsupported ia64 relocation (%d)", type);
|
| 900 |
} |
| 901 |
} |
| 902 |
} |
| 903 |
} |
| 904 |
#elif defined(HOST_SPARC)
|
| 905 |
{
|
| 906 |
char name[256]; |
| 907 |
int type;
|
| 908 |
int addend;
|
| 909 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 910 |
if (rel->r_offset >= start_offset &&
|
| 911 |
rel->r_offset < start_offset + copy_size) {
|
| 912 |
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name; |
| 913 |
if (strstart(sym_name, "__op_param", &p)) { |
| 914 |
snprintf(name, sizeof(name), "param%s", p); |
| 915 |
} else {
|
| 916 |
if (sym_name[0] == '.') |
| 917 |
snprintf(name, sizeof(name),
|
| 918 |
"(long)(&__dot_%s)",
|
| 919 |
sym_name + 1);
|
| 920 |
else
|
| 921 |
snprintf(name, sizeof(name),
|
| 922 |
"(long)(&%s)", sym_name);
|
| 923 |
} |
| 924 |
type = ELF32_R_TYPE(rel->r_info); |
| 925 |
addend = rel->r_addend; |
| 926 |
switch(type) {
|
| 927 |
case R_SPARC_32:
|
| 928 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 929 |
rel->r_offset - start_offset, name, addend); |
| 930 |
break;
|
| 931 |
case R_SPARC_HI22:
|
| 932 |
fprintf(outfile, |
| 933 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 934 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 935 |
" & ~0x3fffff) "
|
| 936 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
| 937 |
rel->r_offset - start_offset, |
| 938 |
rel->r_offset - start_offset, |
| 939 |
name, addend); |
| 940 |
break;
|
| 941 |
case R_SPARC_LO10:
|
| 942 |
fprintf(outfile, |
| 943 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 944 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 945 |
" & ~0x3ff) "
|
| 946 |
" | ((%s + %d) & 0x3ff);\n",
|
| 947 |
rel->r_offset - start_offset, |
| 948 |
rel->r_offset - start_offset, |
| 949 |
name, addend); |
| 950 |
break;
|
| 951 |
case R_SPARC_WDISP30:
|
| 952 |
fprintf(outfile, |
| 953 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 954 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 955 |
" & ~0x3fffffff) "
|
| 956 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
| 957 |
" & 0x3fffffff);\n",
|
| 958 |
rel->r_offset - start_offset, |
| 959 |
rel->r_offset - start_offset, |
| 960 |
name, addend, |
| 961 |
rel->r_offset - start_offset); |
| 962 |
break;
|
| 963 |
default:
|
| 964 |
error("unsupported sparc relocation (%d)", type);
|
| 965 |
} |
| 966 |
} |
| 967 |
} |
| 968 |
} |
| 969 |
#elif defined(HOST_SPARC64)
|
| 970 |
{
|
| 971 |
char name[256]; |
| 972 |
int type;
|
| 973 |
int addend;
|
| 974 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 975 |
if (rel->r_offset >= start_offset &&
|
| 976 |
rel->r_offset < start_offset + copy_size) {
|
| 977 |
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name; |
| 978 |
if (strstart(sym_name, "__op_param", &p)) { |
| 979 |
snprintf(name, sizeof(name), "param%s", p); |
| 980 |
} else {
|
| 981 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 982 |
} |
| 983 |
type = ELF64_R_TYPE(rel->r_info); |
| 984 |
addend = rel->r_addend; |
| 985 |
switch(type) {
|
| 986 |
case R_SPARC_32:
|
| 987 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 988 |
rel->r_offset - start_offset, name, addend); |
| 989 |
break;
|
| 990 |
case R_SPARC_HI22:
|
| 991 |
fprintf(outfile, |
| 992 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 993 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 994 |
" & ~0x3fffff) "
|
| 995 |
" | (((%s + %d) >> 10) & 0x3fffff);\n",
|
| 996 |
rel->r_offset - start_offset, |
| 997 |
rel->r_offset - start_offset, |
| 998 |
name, addend); |
| 999 |
break;
|
| 1000 |
case R_SPARC_LO10:
|
| 1001 |
fprintf(outfile, |
| 1002 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 1003 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 1004 |
" & ~0x3ff) "
|
| 1005 |
" | ((%s + %d) & 0x3ff);\n",
|
| 1006 |
rel->r_offset - start_offset, |
| 1007 |
rel->r_offset - start_offset, |
| 1008 |
name, addend); |
| 1009 |
break;
|
| 1010 |
case R_SPARC_WDISP30:
|
| 1011 |
fprintf(outfile, |
| 1012 |
" *(uint32_t *)(gen_code_ptr + %d) = "
|
| 1013 |
"((*(uint32_t *)(gen_code_ptr + %d)) "
|
| 1014 |
" & ~0x3fffffff) "
|
| 1015 |
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
|
| 1016 |
" & 0x3fffffff);\n",
|
| 1017 |
rel->r_offset - start_offset, |
| 1018 |
rel->r_offset - start_offset, |
| 1019 |
name, addend, |
| 1020 |
rel->r_offset - start_offset); |
| 1021 |
break;
|
| 1022 |
default:
|
| 1023 |
error("unsupported sparc64 relocation (%d)", type);
|
| 1024 |
} |
| 1025 |
} |
| 1026 |
} |
| 1027 |
} |
| 1028 |
#elif defined(HOST_ARM)
|
| 1029 |
{
|
| 1030 |
char name[256]; |
| 1031 |
int type;
|
| 1032 |
int addend;
|
| 1033 |
|
| 1034 |
arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end, |
| 1035 |
relocs, nb_relocs); |
| 1036 |
|
| 1037 |
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) { |
| 1038 |
if (rel->r_offset >= start_offset &&
|
| 1039 |
rel->r_offset < start_offset + copy_size) {
|
| 1040 |
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name; |
| 1041 |
/* the compiler leave some unnecessary references to the code */
|
| 1042 |
if (sym_name[0] == '\0') |
| 1043 |
continue;
|
| 1044 |
if (strstart(sym_name, "__op_param", &p)) { |
| 1045 |
snprintf(name, sizeof(name), "param%s", p); |
| 1046 |
} else {
|
| 1047 |
snprintf(name, sizeof(name), "(long)(&%s)", sym_name); |
| 1048 |
} |
| 1049 |
type = ELF32_R_TYPE(rel->r_info); |
| 1050 |
addend = get32((uint32_t *)(text + rel->r_offset)); |
| 1051 |
switch(type) {
|
| 1052 |
case R_ARM_ABS32:
|
| 1053 |
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
|
| 1054 |
rel->r_offset - start_offset, name, addend); |
| 1055 |
break;
|
| 1056 |
case R_ARM_PC24:
|
| 1057 |
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
|
| 1058 |
rel->r_offset - start_offset, addend, name); |
| 1059 |
break;
|
| 1060 |
default:
|
| 1061 |
error("unsupported arm relocation (%d)", type);
|
| 1062 |
} |
| 1063 |
} |
| 1064 |
} |
| 1065 |
} |
| 1066 |
#else
|
| 1067 |
#error unsupported CPU
|
| 1068 |
#endif
|
| 1069 |
fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
|
| 1070 |
fprintf(outfile, "}\n");
|
| 1071 |
fprintf(outfile, "break;\n\n");
|
| 1072 |
} else {
|
| 1073 |
fprintf(outfile, "static inline void gen_%s(", name);
|
| 1074 |
if (nb_args == 0) { |
| 1075 |
fprintf(outfile, "void");
|
| 1076 |
} else {
|
| 1077 |
for(i = 0; i < nb_args; i++) { |
| 1078 |
if (i != 0) |
| 1079 |
fprintf(outfile, ", ");
|
| 1080 |
fprintf(outfile, "long param%d", i + 1); |
| 1081 |
} |
| 1082 |
} |
| 1083 |
fprintf(outfile, ")\n");
|
| 1084 |
fprintf(outfile, "{\n");
|
| 1085 |
for(i = 0; i < nb_args; i++) { |
| 1086 |
fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1); |
| 1087 |
} |
| 1088 |
fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
|
| 1089 |
fprintf(outfile, "}\n\n");
|
| 1090 |
} |
| 1091 |
} |
| 1092 |
|
| 1093 |
/* load an elf object file */
|
| 1094 |
int load_elf(const char *filename, FILE *outfile, int out_type) |
| 1095 |
{
|
| 1096 |
int fd;
|
| 1097 |
struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
|
| 1098 |
int i, j;
|
| 1099 |
ElfW(Sym) *sym; |
| 1100 |
char *shstr;
|
| 1101 |
uint8_t *text; |
| 1102 |
ELF_RELOC *relocs; |
| 1103 |
int nb_relocs;
|
| 1104 |
ELF_RELOC *rel; |
| 1105 |
|
| 1106 |
fd = open(filename, O_RDONLY); |
| 1107 |
if (fd < 0) |
| 1108 |
error("can't open file '%s'", filename);
|
| 1109 |
|
| 1110 |
/* Read ELF header. */
|
| 1111 |
if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr)) |
| 1112 |
error("unable to read file header");
|
| 1113 |
|
| 1114 |
/* Check ELF identification. */
|
| 1115 |
if (ehdr.e_ident[EI_MAG0] != ELFMAG0
|
| 1116 |
|| ehdr.e_ident[EI_MAG1] != ELFMAG1 |
| 1117 |
|| ehdr.e_ident[EI_MAG2] != ELFMAG2 |
| 1118 |
|| ehdr.e_ident[EI_MAG3] != ELFMAG3 |
| 1119 |
|| ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
|
| 1120 |
error("bad ELF header");
|
| 1121 |
} |
| 1122 |
|
| 1123 |
do_swap = elf_must_swap(&ehdr); |
| 1124 |
if (do_swap)
|
| 1125 |
elf_swap_ehdr(&ehdr); |
| 1126 |
if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
|
| 1127 |
error("Unsupported ELF class");
|
| 1128 |
if (ehdr.e_type != ET_REL)
|
| 1129 |
error("ELF object file expected");
|
| 1130 |
if (ehdr.e_version != EV_CURRENT)
|
| 1131 |
error("Invalid ELF version");
|
| 1132 |
if (!elf_check_arch(ehdr.e_machine))
|
| 1133 |
error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
|
| 1134 |
|
| 1135 |
/* read section headers */
|
| 1136 |
shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr)); |
| 1137 |
if (do_swap) {
|
| 1138 |
for(i = 0; i < ehdr.e_shnum; i++) { |
| 1139 |
elf_swap_shdr(&shdr[i]); |
| 1140 |
} |
| 1141 |
} |
| 1142 |
|
| 1143 |
/* read all section data */
|
| 1144 |
sdata = malloc(sizeof(void *) * ehdr.e_shnum); |
| 1145 |
memset(sdata, 0, sizeof(void *) * ehdr.e_shnum); |
| 1146 |
|
| 1147 |
for(i = 0;i < ehdr.e_shnum; i++) { |
| 1148 |
sec = &shdr[i]; |
| 1149 |
if (sec->sh_type != SHT_NOBITS)
|
| 1150 |
sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size); |
| 1151 |
} |
| 1152 |
|
| 1153 |
sec = &shdr[ehdr.e_shstrndx]; |
| 1154 |
shstr = sdata[ehdr.e_shstrndx]; |
| 1155 |
|
| 1156 |
/* swap relocations */
|
| 1157 |
for(i = 0; i < ehdr.e_shnum; i++) { |
| 1158 |
sec = &shdr[i]; |
| 1159 |
if (sec->sh_type == SHT_RELOC) {
|
| 1160 |
nb_relocs = sec->sh_size / sec->sh_entsize; |
| 1161 |
if (do_swap) {
|
| 1162 |
for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++) |
| 1163 |
elf_swap_rel(rel); |
| 1164 |
} |
| 1165 |
} |
| 1166 |
} |
| 1167 |
/* text section */
|
| 1168 |
|
| 1169 |
text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
|
| 1170 |
if (!text_sec)
|
| 1171 |
error("could not find .text section");
|
| 1172 |
text_shndx = text_sec - shdr; |
| 1173 |
text = sdata[text_shndx]; |
| 1174 |
|
| 1175 |
/* find text relocations, if any */
|
| 1176 |
relocs = NULL;
|
| 1177 |
nb_relocs = 0;
|
| 1178 |
i = find_reloc(text_shndx); |
| 1179 |
if (i != 0) { |
| 1180 |
relocs = (ELF_RELOC *)sdata[i]; |
| 1181 |
nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize; |
| 1182 |
} |
| 1183 |
|
| 1184 |
symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
|
| 1185 |
if (!symtab_sec)
|
| 1186 |
error("could not find .symtab section");
|
| 1187 |
strtab_sec = &shdr[symtab_sec->sh_link]; |
| 1188 |
|
| 1189 |
symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr]; |
| 1190 |
strtab = sdata[symtab_sec->sh_link]; |
| 1191 |
|
| 1192 |
nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
|
| 1193 |
if (do_swap) {
|
| 1194 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| 1195 |
swab32s(&sym->st_name); |
| 1196 |
swabls(&sym->st_value); |
| 1197 |
swabls(&sym->st_size); |
| 1198 |
swab16s(&sym->st_shndx); |
| 1199 |
} |
| 1200 |
} |
| 1201 |
|
| 1202 |
if (out_type == OUT_INDEX_OP) {
|
| 1203 |
fprintf(outfile, "DEF(end, 0, 0)\n");
|
| 1204 |
fprintf(outfile, "DEF(nop, 0, 0)\n");
|
| 1205 |
fprintf(outfile, "DEF(nop1, 1, 0)\n");
|
| 1206 |
fprintf(outfile, "DEF(nop2, 2, 0)\n");
|
| 1207 |
fprintf(outfile, "DEF(nop3, 3, 0)\n");
|
| 1208 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| 1209 |
const char *name, *p; |
| 1210 |
name = strtab + sym->st_name; |
| 1211 |
if (strstart(name, OP_PREFIX, &p)) {
|
| 1212 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
| 1213 |
text, relocs, nb_relocs, 2);
|
| 1214 |
} |
| 1215 |
} |
| 1216 |
} else if (out_type == OUT_GEN_OP) { |
| 1217 |
/* generate gen_xxx functions */
|
| 1218 |
|
| 1219 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| 1220 |
const char *name; |
| 1221 |
name = strtab + sym->st_name; |
| 1222 |
if (strstart(name, OP_PREFIX, NULL)) { |
| 1223 |
if (sym->st_shndx != (text_sec - shdr))
|
| 1224 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
| 1225 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
| 1226 |
text, relocs, nb_relocs, 0);
|
| 1227 |
} |
| 1228 |
} |
| 1229 |
|
| 1230 |
} else {
|
| 1231 |
/* generate big code generation switch */
|
| 1232 |
fprintf(outfile, |
| 1233 |
"int dyngen_code(uint8_t *gen_code_buf,\n"
|
| 1234 |
" uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
|
| 1235 |
" const uint16_t *opc_buf, const uint32_t *opparam_buf)\n"
|
| 1236 |
"{\n"
|
| 1237 |
" uint8_t *gen_code_ptr;\n"
|
| 1238 |
" const uint16_t *opc_ptr;\n"
|
| 1239 |
" const uint32_t *opparam_ptr;\n");
|
| 1240 |
|
| 1241 |
#ifdef HOST_ARM
|
| 1242 |
fprintf(outfile, |
| 1243 |
" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
|
| 1244 |
" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
|
| 1245 |
" uint32_t *arm_data_ptr = arm_data_table;\n");
|
| 1246 |
#endif
|
| 1247 |
|
| 1248 |
fprintf(outfile, |
| 1249 |
"\n"
|
| 1250 |
" gen_code_ptr = gen_code_buf;\n"
|
| 1251 |
" opc_ptr = opc_buf;\n"
|
| 1252 |
" opparam_ptr = opparam_buf;\n");
|
| 1253 |
|
| 1254 |
/* Generate prologue, if needed. */
|
| 1255 |
|
| 1256 |
fprintf(outfile, |
| 1257 |
" for(;;) {\n"
|
| 1258 |
" switch(*opc_ptr++) {\n"
|
| 1259 |
); |
| 1260 |
|
| 1261 |
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) { |
| 1262 |
const char *name; |
| 1263 |
name = strtab + sym->st_name; |
| 1264 |
if (strstart(name, OP_PREFIX, NULL)) { |
| 1265 |
#if 0
|
| 1266 |
printf("%4d: %s pos=0x%08x len=%d\n",
|
| 1267 |
i, name, sym->st_value, sym->st_size);
|
| 1268 |
#endif
|
| 1269 |
if (sym->st_shndx != (text_sec - shdr))
|
| 1270 |
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
| 1271 |
gen_code(name, sym->st_value, sym->st_size, outfile, |
| 1272 |
text, relocs, nb_relocs, 1);
|
| 1273 |
} |
| 1274 |
} |
| 1275 |
|
| 1276 |
fprintf(outfile, |
| 1277 |
" case INDEX_op_nop:\n"
|
| 1278 |
" break;\n"
|
| 1279 |
" case INDEX_op_nop1:\n"
|
| 1280 |
" opparam_ptr++;\n"
|
| 1281 |
" break;\n"
|
| 1282 |
" case INDEX_op_nop2:\n"
|
| 1283 |
" opparam_ptr += 2;\n"
|
| 1284 |
" break;\n"
|
| 1285 |
" case INDEX_op_nop3:\n"
|
| 1286 |
" opparam_ptr += 3;\n"
|
| 1287 |
" break;\n"
|
| 1288 |
" default:\n"
|
| 1289 |
" goto the_end;\n"
|
| 1290 |
" }\n");
|
| 1291 |
|
| 1292 |
#ifdef HOST_ARM
|
| 1293 |
/* generate constant table if needed */
|
| 1294 |
fprintf(outfile, |
| 1295 |
" if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
|
| 1296 |
" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
|
| 1297 |
" last_gen_code_ptr = gen_code_ptr;\n"
|
| 1298 |
" arm_ldr_ptr = arm_ldr_table;\n"
|
| 1299 |
" arm_data_ptr = arm_data_table;\n"
|
| 1300 |
" }\n");
|
| 1301 |
#endif
|
| 1302 |
|
| 1303 |
|
| 1304 |
fprintf(outfile, |
| 1305 |
" }\n"
|
| 1306 |
" the_end:\n"
|
| 1307 |
); |
| 1308 |
|
| 1309 |
/* generate some code patching */
|
| 1310 |
#ifdef HOST_ARM
|
| 1311 |
fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
|
| 1312 |
#endif
|
| 1313 |
/* flush instruction cache */
|
| 1314 |
fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
|
| 1315 |
|
| 1316 |
fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
|
| 1317 |
fprintf(outfile, "}\n\n");
|
| 1318 |
|
| 1319 |
} |
| 1320 |
|
| 1321 |
close(fd); |
| 1322 |
return 0; |
| 1323 |
} |
| 1324 |
|
| 1325 |
void usage(void) |
| 1326 |
{
|
| 1327 |
printf("dyngen (c) 2003 Fabrice Bellard\n"
|
| 1328 |
"usage: dyngen [-o outfile] [-c] objfile\n"
|
| 1329 |
"Generate a dynamic code generator from an object file\n"
|
| 1330 |
"-c output enum of operations\n"
|
| 1331 |
"-g output gen_op_xx() functions\n"
|
| 1332 |
); |
| 1333 |
exit(1);
|
| 1334 |
} |
| 1335 |
|
| 1336 |
int main(int argc, char **argv) |
| 1337 |
{
|
| 1338 |
int c, out_type;
|
| 1339 |
const char *filename, *outfilename; |
| 1340 |
FILE *outfile; |
| 1341 |
|
| 1342 |
outfilename = "out.c";
|
| 1343 |
out_type = OUT_CODE; |
| 1344 |
for(;;) {
|
| 1345 |
c = getopt(argc, argv, "ho:cg");
|
| 1346 |
if (c == -1) |
| 1347 |
break;
|
| 1348 |
switch(c) {
|
| 1349 |
case 'h': |
| 1350 |
usage(); |
| 1351 |
break;
|
| 1352 |
case 'o': |
| 1353 |
outfilename = optarg; |
| 1354 |
break;
|
| 1355 |
case 'c': |
| 1356 |
out_type = OUT_INDEX_OP; |
| 1357 |
break;
|
| 1358 |
case 'g': |
| 1359 |
out_type = OUT_GEN_OP; |
| 1360 |
break;
|
| 1361 |
} |
| 1362 |
} |
| 1363 |
if (optind >= argc)
|
| 1364 |
usage(); |
| 1365 |
filename = argv[optind]; |
| 1366 |
outfile = fopen(outfilename, "w");
|
| 1367 |
if (!outfile)
|
| 1368 |
error("could not open '%s'", outfilename);
|
| 1369 |
load_elf(filename, outfile, out_type); |
| 1370 |
fclose(outfile); |
| 1371 |
return 0; |
| 1372 |
} |