319 lines
8.1 KiB
C
319 lines
8.1 KiB
C
/*
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* This program is for making libtcc1.a without ar
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* tiny_libmaker - tiny elf lib maker
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* usage: tiny_libmaker [lib] files...
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* Copyright (c) 2007 Timppa
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*
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* This program is free software but WITHOUT ANY WARRANTY
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* #include "ar-elf.h" */
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/* "ar-elf.h" */
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/* ELF_v1.2.pdf */
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typedef unsigned short int Elf32_Half;
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typedef int Elf32_Sword;
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typedef unsigned int Elf32_Word;
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typedef unsigned int Elf32_Addr;
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typedef unsigned int Elf32_Off;
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typedef unsigned short int Elf32_Section;
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#define EI_NIDENT 16
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typedef struct {
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unsigned char e_ident[EI_NIDENT];
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Elf32_Half e_type;
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Elf32_Half e_machine;
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Elf32_Word e_version;
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Elf32_Addr e_entry;
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Elf32_Off e_phoff;
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Elf32_Off e_shoff;
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Elf32_Word e_flags;
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Elf32_Half e_ehsize;
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Elf32_Half e_phentsize;
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Elf32_Half e_phnum;
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Elf32_Half e_shentsize;
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Elf32_Half e_shnum;
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Elf32_Half e_shstrndx;
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} Elf32_Ehdr;
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typedef struct {
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Elf32_Word sh_name;
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Elf32_Word sh_type;
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Elf32_Word sh_flags;
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Elf32_Addr sh_addr;
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Elf32_Off sh_offset;
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Elf32_Word sh_size;
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Elf32_Word sh_link;
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Elf32_Word sh_info;
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Elf32_Word sh_addralign;
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Elf32_Word sh_entsize;
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} Elf32_Shdr;
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#define SHT_NULL 0
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#define SHT_PROGBITS 1
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#define SHT_SYMTAB 2
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#define SHT_STRTAB 3
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#define SHT_RELA 4
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#define SHT_HASH 5
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#define SHT_DYNAMIC 6
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#define SHT_NOTE 7
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#define SHT_NOBITS 8
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#define SHT_REL 9
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#define SHT_SHLIB 10
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#define SHT_DYNSYM 11
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typedef struct {
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Elf32_Word st_name;
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Elf32_Addr st_value;
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Elf32_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf32_Half st_shndx;
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} Elf32_Sym;
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#define ELF32_ST_BIND(i) ((i)>>4)
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#define ELF32_ST_TYPE(i) ((i)&0xf)
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#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
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#define STT_NOTYPE 0
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#define STT_OBJECT 1
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#define STT_FUNC 2
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#define STT_SECTION 3
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#define STT_FILE 4
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#define STT_LOPROC 13
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#define STT_HIPROC 15
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#define STB_LOCAL 0
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#define STB_GLOBAL 1
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#define STB_WEAK 2
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#define STB_LOPROC 13
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#define STB_HIPROC 15
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typedef struct {
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Elf32_Word p_type;
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Elf32_Off p_offset;
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Elf32_Addr p_vaddr;
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Elf32_Addr p_paddr;
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Elf32_Word p_filesz;
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Elf32_Word p_memsz;
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Elf32_Word p_flags;
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Elf32_Word p_align;
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} Elf32_Phdr;
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/* "ar-elf.h" ends */
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#define ARMAG "!<arch>\n"
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#define ARFMAG "`\n"
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typedef struct ArHdr {
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char ar_name[16];
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char ar_date[12];
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char ar_uid[6];
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char ar_gid[6];
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char ar_mode[8];
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char ar_size[10];
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char ar_fmag[2];
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} ArHdr;
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unsigned long le2belong(unsigned long ul) {
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return ((ul & 0xFF0000)>>8)+((ul & 0xFF000000)>>24) +
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((ul & 0xFF)<<24)+((ul & 0xFF00)<<8);
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}
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ArHdr arhdr = {
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"/ ",
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" ",
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"0 ",
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"0 ",
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"0 ",
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" ",
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ARFMAG
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};
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ArHdr arhdro = {
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" ",
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" ",
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"0 ",
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"0 ",
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"0 ",
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" ",
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ARFMAG
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};
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int main(int argc, char **argv)
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{
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FILE *fi, *fh, *fo;
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Elf32_Ehdr *ehdr;
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Elf32_Shdr *shdr;
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Elf32_Sym *sym;
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int i, fsize, iarg;
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char *buf, *shstr, *symtab = NULL, *strtab = NULL;
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int symtabsize = 0, strtabsize = 0;
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char *anames = NULL;
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int *afpos = NULL;
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int istrlen, strpos = 0, fpos = 0, funccnt = 0, funcmax, hofs;
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char afile[260], tfile[260], stmp[20];
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strcpy(afile, "ar_test.a");
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iarg = 1;
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if (argc < 2)
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{
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printf("usage: tiny_libmaker [lib] file...\n");
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return 1;
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}
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for (i=1; i<argc; i++) {
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istrlen = strlen(argv[i]);
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if (argv[i][istrlen-2] == '.') {
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if(argv[i][istrlen-1] == 'a')
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strcpy(afile, argv[i]);
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else if(argv[i][istrlen-1] == 'o') {
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iarg = i;
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break;
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}
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}
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}
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//tfile[0] = '.'; tfile[1] = '/';
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//if (tmpnam(&tfile[2])) {
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strcpy(tfile, "./XXXXXX");
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if (mktemp(tfile))
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{
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if ((fo = fopen(tfile, "wb+")) == NULL)
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{
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fprintf(stderr, "Can't open file %s \n", tfile);
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return 2;
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}
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}
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/*
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if ((fo = tmpfile()) == NULL)
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{
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fprintf(stderr, "Can't open temporary file \n");
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return 2;
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}
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*/
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if ((fh = fopen(afile, "wb")) == NULL)
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{
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fprintf(stderr, "Can't open file %s \n", afile);
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remove(tfile);
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return 2;
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}
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funcmax = 1000;
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afpos = realloc(NULL, funcmax); // 250 func
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memcpy(&arhdro.ar_mode, "100666", 6);
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//iarg = 1;
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while (iarg < argc)
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{
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if (!strcmp(argv[iarg], "rcs")) {
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iarg++;
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continue;
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}
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if ((fi = fopen(argv[iarg], "rb")) == NULL)
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{
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fprintf(stderr, "Can't open file %s \n", argv[iarg]);
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remove(tfile);
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return 2;
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}
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fseek(fi, 0, SEEK_END);
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fsize = ftell(fi);
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fseek(fi, 0, SEEK_SET);
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buf = malloc(fsize + 1);
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fread(buf, fsize, 1, fi);
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fclose(fi);
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printf("%s:\n", argv[iarg]);
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// elf header
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ehdr = (Elf32_Ehdr *)buf;
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shdr = (Elf32_Shdr *) (buf + ehdr->e_shoff + ehdr->e_shstrndx * ehdr->e_shentsize);
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shstr = (char *)(buf + shdr->sh_offset);
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for (i = 0; i < ehdr->e_shnum; i++)
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{
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shdr = (Elf32_Shdr *) (buf + ehdr->e_shoff + i * ehdr->e_shentsize);
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if (!shdr->sh_offset) continue;
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if (shdr->sh_type == SHT_SYMTAB)
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{
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symtab = (char *)(buf + shdr->sh_offset);
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symtabsize = shdr->sh_size;
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}
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if (shdr->sh_type == SHT_STRTAB)
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{
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if (!strcmp(shstr + shdr->sh_name, ".strtab"))
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{
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strtab = (char *)(buf + shdr->sh_offset);
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strtabsize = shdr->sh_size;
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}
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}
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}
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if (symtab && symtabsize)
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{
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int nsym = symtabsize / sizeof(Elf32_Sym);
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//printf("symtab: info size shndx name\n");
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for (i = 1; i < nsym; i++)
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{
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sym = (Elf32_Sym *) (symtab + i * sizeof(Elf32_Sym));
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if (sym->st_shndx && (sym->st_info == 0x11 || sym->st_info == 0x12)) {
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//printf("symtab: %2Xh %4Xh %2Xh %s\n", sym->st_info, sym->st_size, sym->st_shndx, strtab + sym->st_name);
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istrlen = strlen(strtab + sym->st_name)+1;
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anames = realloc(anames, strpos+istrlen);
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strcpy(anames + strpos, strtab + sym->st_name);
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strpos += istrlen;
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if (funccnt >= funcmax) {
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afpos = realloc(NULL, funcmax+1000); // 250 func more
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funcmax += 1000;
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}
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afpos[++funccnt] = fpos;
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}
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}
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}
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memset(&arhdro.ar_name, ' ', sizeof(arhdr.ar_name));
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strcpy(arhdro.ar_name, argv[iarg]);
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arhdro.ar_name[strlen(argv[iarg])] = '/';
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sprintf(stmp, "%-10d", fsize);
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memcpy(&arhdro.ar_size, stmp, 10);
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fwrite(&arhdro, sizeof(arhdro), 1, fo);
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fwrite(buf, fsize, 1, fo);
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free(buf);
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iarg++;
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fpos += (fsize + sizeof(arhdro));
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}
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hofs = 8 + sizeof(arhdr) + strpos + (funccnt+1) * sizeof(int);
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if ((hofs & 1)) { // align
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hofs++;
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fpos = 1;
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} else fpos = 0;
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// write header
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fwrite("!<arch>\n", 8, 1, fh);
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sprintf(stmp, "%-10d", strpos + (funccnt+1) * sizeof(int));
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memcpy(&arhdr.ar_size, stmp, 10);
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fwrite(&arhdr, sizeof(arhdr), 1, fh);
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afpos[0] = le2belong(funccnt);
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for (i=1; i<=funccnt; i++) {
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afpos[i] = le2belong(afpos[i] + hofs);
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}
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fwrite(afpos, (funccnt+1) * sizeof(int), 1, fh);
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fwrite(anames, strpos, 1, fh);
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if (fpos) fwrite("", 1, 1, fh);
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// write objects
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fseek(fo, 0, SEEK_END);
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fsize = ftell(fo);
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fseek(fo, 0, SEEK_SET);
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buf = malloc(fsize + 1);
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fread(buf, fsize, 1, fo);
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fclose(fo);
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fwrite(buf, fsize, 1, fh);
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fclose(fh);
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free(buf);
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if (anames)
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free(anames);
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if (afpos)
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free(afpos);
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remove(tfile);
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return 0;
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}
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