133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include <mach.h>
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#include "elf.h"
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#include "stabs.h"
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void
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usage(void)
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{
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fprint(2, "usage: elf file list\n");
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fprint(2, " elf file syms\n");
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fprint(2, " elf file prog n\n");
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fprint(2, " elf file sect n\n");
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exits("usage");
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}
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void
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main(int argc, char **argv)
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{
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int i, n, nn;
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char buf[512];
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ulong off, len;
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Elf *elf;
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ElfProg *p;
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ElfSect *s;
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ARGBEGIN{
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default:
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usage();
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}ARGEND
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if(argc < 2)
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usage();
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if((elf = elfopen(argv[0])) == nil)
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sysfatal("elfopen %s: %r", argv[0]);
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if(strcmp(argv[1], "syms") == 0){
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ElfSym sym;
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for(i=0; elfsym(elf, i, &sym) >= 0; i++){
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print("%s 0x%lux +%lud bind %d type %d other %d shndx 0x%ux\n",
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sym.name, (ulong)sym.value, (ulong)sym.size,
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sym.bind, sym.type, sym.other, (uint)sym.shndx);
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}
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}
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else if(strcmp(argv[1], "stabs") == 0){
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ElfSect *s1, *s2;
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Stab stabs;
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StabSym sym;
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if((s1 = elfsection(elf, ".stab")) == nil)
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sysfatal("no stabs");
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if(s1->link==0 || s1->link >= elf->nsect)
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sysfatal("bad stabstr %d", s1->link);
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s2 = &elf->sect[s1->link];
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if(elfmap(elf, s1) < 0 || elfmap(elf, s2) < 0)
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sysfatal("elfmap");
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stabs.stabbase = s1->base;
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stabs.stabsize = s1->size;
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stabs.strbase = s2->base;
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stabs.strsize = s2->size;
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stabs.e2 = elf->hdr.e2;
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stabs.e4 = elf->hdr.e4;
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print("%ud %ud\n", stabs.stabsize, stabs.strsize);
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for(i=0; stabsym(&stabs, i, &sym) >= 0; i++)
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print("%s type 0x%x other %d desc %d value 0x%lux\n",
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sym.name, sym.type, sym.other, (int)sym.desc, (ulong)sym.value);
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fprint(2, "err at %d: %r\n", i);
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}
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else if(strcmp(argv[1], "list") == 0){
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if(argc != 2)
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usage();
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print("elf %s %s v%d entry 0x%08lux phoff 0x%lux shoff 0x%lux flags 0x%lux\n",
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elftype(elf->hdr.type), elfmachine(elf->hdr.machine),
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elf->hdr.version, elf->hdr.entry, elf->hdr.phoff, elf->hdr.shoff,
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elf->hdr.flags);
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print("\tehsize %d phentsize %d phnum %d shentsize %d shnum %d shstrndx %d\n",
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elf->hdr.ehsize, elf->hdr.phentsize, elf->hdr.phnum, elf->hdr.shentsize,
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elf->hdr.shnum, elf->hdr.shstrndx);
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for(i=0; i<elf->nprog; i++){
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p = &elf->prog[i];
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print("prog %d type %d offset 0x%08lux vaddr 0x%08lux paddr 0x%08lux filesz 0x%08lux memsz 0x%08lux flags 0x%08lux align 0x%08lux\n",
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i, p->type, p->offset, p->vaddr, p->paddr,
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p->filesz, p->memsz, p->flags, p->align);
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}
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for(i=0; i<elf->nsect; i++){
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s = &elf->sect[i];
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print("sect %d %s type %d flags 0x%lux addr 0x%08lux offset 0x%08lux size 0x%08lux link 0x%lux info 0x%lux align 0x%lux entsize 0x%lux\n",
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i, s->name, s->type, s->flags, s->addr, s->offset, s->size, s->link, s->info,
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s->align, s->entsize);
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}
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}
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else if(strcmp(argv[1], "prog") == 0){
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if(argc != 3)
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usage();
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i = atoi(argv[2]);
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if(i < 0 || i >= elf->nprog)
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sysfatal("bad prog number");
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off = elf->prog[i].offset;
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len = elf->prog[i].filesz;
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fprint(2, "prog %d offset 0x%lux size 0x%lux\n", i, off, len);
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copy:
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seek(elf->fd, off, 0);
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for(n=0; n<len; n+=nn){
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nn = sizeof buf;
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if(nn > len-n)
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nn = len-n;
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nn = read(elf->fd, buf, nn);
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if(nn == 0)
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break;
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if(nn < 0)
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sysfatal("read error");
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write(1, buf, nn);
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}
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if(n < len)
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fprint(2, "early eof\n");
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}
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else if(strcmp(argv[1], "sect") == 0){
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if(argc != 3)
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usage();
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i = atoi(argv[2]);
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if(i < 0 || i >= elf->nsect)
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sysfatal("bad section number");
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off = elf->sect[i].offset;
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len = elf->sect[i].size;
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fprint(2, "section %d offset 0x%lux size 0x%lux\n", i, off, len);
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goto copy;
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}
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else
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usage();
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exits(0);
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}
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