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-rw-r--r--elf/check-localplt.c299
1 files changed, 0 insertions, 299 deletions
diff --git a/elf/check-localplt.c b/elf/check-localplt.c
deleted file mode 100644
index b4358a8a3f..0000000000
--- a/elf/check-localplt.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/* Show local PLT use in DSOs.
- Copyright (C) 2006 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contribute by Ulrich Drepper <drepper@redhat.com>. 2006.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#include <byteswap.h>
-#include <elf.h>
-#include <endian.h>
-#include <fcntl.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-#ifdef BITS
-
-# define AB(name) _AB (name, BITS)
-# define _AB(name, bits) __AB (name, bits)
-# define __AB(name, bits) name##bits
-# define E(name) _E (name, BITS)
-# define _E(name, bits) __E (name, bits)
-# define __E(name, bits) Elf##bits##_##name
-# define EE(name) _EE (name, BITS)
-# define _EE(name, bits) __EE (name, bits)
-# define __EE(name, bits) ELF##bits##_##name
-# define SWAP(val) \
- ({ __typeof (val) __res; \
- if (((ehdr.e_ident[EI_DATA] == ELFDATA2MSB \
- && BYTE_ORDER == LITTLE_ENDIAN) \
- || (ehdr.e_ident[EI_DATA] == ELFDATA2LSB \
- && BYTE_ORDER == BIG_ENDIAN)) \
- && sizeof (val) != 1) \
- { \
- if (sizeof (val) == 2) \
- __res = bswap_16 (val); \
- else if (sizeof (val) == 4) \
- __res = bswap_32 (val); \
- else \
- __res = bswap_64 (val); \
- } \
- else \
- __res = (val); \
- __res; })
-
-
-static int
-AB(handle_file) (const char *fname, int fd)
-{
- E(Ehdr) ehdr;
-
- if (pread (fd, &ehdr, sizeof (ehdr), 0) != sizeof (ehdr))
- {
- read_error:
- printf ("%s: read error: %m\n", fname);
- return 1;
- }
-
- const size_t phnum = SWAP (ehdr.e_phnum);
- const size_t phentsize = SWAP (ehdr.e_phentsize);
-
- /* Read the program header. */
- E(Phdr) *phdr = alloca (phentsize * phnum);
- if (pread (fd, phdr, phentsize * phnum, SWAP (ehdr.e_phoff))
- != phentsize * phnum)
- goto read_error;
-
- /* Search for the PT_DYNAMIC entry. */
- size_t cnt;
- E(Phdr) *dynphdr = NULL;
- for (cnt = 0; cnt < phnum; ++cnt)
- if (SWAP (phdr[cnt].p_type) == PT_DYNAMIC)
- {
- dynphdr = &phdr[cnt];
- break;
- }
-
- if (dynphdr == NULL)
- {
- printf ("%s: no DYNAMIC segment found\n", fname);
- return 1;
- }
-
- /* Read the dynamic segment. */
- size_t pmemsz = SWAP(dynphdr->p_memsz);
- E(Dyn) *dyn = alloca (pmemsz);
- if (pread64 (fd, dyn, pmemsz, SWAP(dynphdr->p_offset)) != pmemsz)
- goto read_error;
-
- /* Search for an DT_PLTREL, DT_JMPREL, DT_PLTRELSZ, DT_STRTAB,
- DT_STRSZ, and DT_SYMTAB entries. */
- size_t pltrel_idx = SIZE_MAX;
- size_t jmprel_idx = SIZE_MAX;
- size_t pltrelsz_idx = SIZE_MAX;
- size_t strtab_idx = SIZE_MAX;
- size_t strsz_idx = SIZE_MAX;
- size_t symtab_idx = SIZE_MAX;
- for (cnt = 0; (cnt + 1) * sizeof (E(Dyn)) - 1 < pmemsz; ++cnt)
- {
- unsigned int tag = SWAP (dyn[cnt].d_tag);
-
- if (tag == DT_NULL)
- /* We reached the end. */
- break;
-
- if (tag == DT_PLTREL)
- pltrel_idx = cnt;
- else if (tag == DT_JMPREL)
- jmprel_idx = cnt;
- else if (tag == DT_PLTRELSZ)
- pltrelsz_idx = cnt;
- else if (tag == DT_STRTAB)
- strtab_idx = cnt;
- else if (tag == DT_STRSZ)
- strsz_idx = cnt;
- else if (tag == DT_SYMTAB)
- symtab_idx = cnt;
- }
-
- if (pltrel_idx == SIZE_MAX || jmprel_idx == SIZE_MAX
- || pltrelsz_idx == SIZE_MAX || strtab_idx == SIZE_MAX
- || strsz_idx == SIZE_MAX || symtab_idx == SIZE_MAX)
- {
- puts ("not all PLT information found");
- return 1;
- }
-
- E(Xword) relsz = SWAP (dyn[pltrelsz_idx].d_un.d_val);
-
- void *relmem = NULL;
- char *strtab = NULL;
- E(Xword) symtab_offset = 0;
-
- /* Find the offset of DT_JMPREL and load the data. */
- for (cnt = 0; cnt < phnum; ++cnt)
- if (SWAP (phdr[cnt].p_type) == PT_LOAD)
- {
- E(Addr) vaddr = SWAP (phdr[cnt].p_vaddr);
- E(Xword) memsz = SWAP (phdr[cnt].p_memsz);
-
- if (vaddr <= SWAP (dyn[jmprel_idx].d_un.d_val)
- && vaddr + memsz >= SWAP (dyn[jmprel_idx].d_un.d_val) + relsz)
- {
- relmem = alloca (SWAP (dyn[pltrelsz_idx].d_un.d_val));
- if (pread64 (fd, relmem, relsz,
- SWAP (phdr[cnt].p_offset)
- + SWAP (dyn[jmprel_idx].d_un.d_val) - vaddr)
- != relsz)
- {
- puts ("cannot read JMPREL");
- return 1;
- }
- }
-
- if (vaddr <= SWAP (dyn[symtab_idx].d_un.d_val)
- && vaddr + memsz > SWAP (dyn[symtab_idx].d_un.d_val))
- symtab_offset = (SWAP (phdr[cnt].p_offset)
- + SWAP (dyn[symtab_idx].d_un.d_val) - vaddr);
-
- if (vaddr <= SWAP (dyn[strtab_idx].d_un.d_val)
- && vaddr + memsz >= (SWAP (dyn[strtab_idx].d_un.d_val)
- + SWAP(dyn[strsz_idx].d_un.d_val)))
- {
- strtab = alloca (SWAP(dyn[strsz_idx].d_un.d_val));
- if (pread64 (fd, strtab, SWAP(dyn[strsz_idx].d_un.d_val),
- SWAP (phdr[cnt].p_offset)
- + SWAP (dyn[strtab_idx].d_un.d_val) - vaddr)
- != SWAP(dyn[strsz_idx].d_un.d_val))
- {
- puts ("cannot read STRTAB");
- return 1;
- }
- }
- }
-
- if (relmem == NULL || strtab == NULL || symtab_offset == 0)
- {
- puts ("couldn't load PLT data");
- return 1;
- }
-
- if (SWAP (dyn[pltrel_idx].d_un.d_val) == DT_RELA)
- for (E(Rela) *rela = relmem; (char *) rela - (char *) relmem < relsz;
- ++rela)
- {
- E(Sym) sym;
-
- if (pread64 (fd, &sym, sizeof (sym),
- symtab_offset
- + EE(R_SYM) (SWAP (rela->r_info)) * sizeof (sym))
- != sizeof (sym))
- {
- puts ("cannot read symbol");
- return 1;
- }
-
- if (sym.st_value != 0)
- /* This symbol is locally defined. */
- printf ("%s: %s\n", basename (fname), strtab + SWAP (sym.st_name));
- }
- else
- for (E(Rel) *rel = relmem; (char *) rel - (char *) relmem < relsz; ++rel)
- {
- E(Sym) sym;
-
- if (pread64 (fd, &sym, sizeof (sym),
- symtab_offset
- + EE(R_SYM) (SWAP (rel->r_info)) * sizeof (sym))
- != sizeof (sym))
- {
- puts ("cannot read symbol");
- return 1;
- }
-
- if (sym.st_value != 0)
- /* This symbol is locally defined. */
- printf ("%s: %s\n", basename (fname), strtab + SWAP (sym.st_name));
- }
-
- return 0;
-}
-
-# undef BITS
-#else
-
-# define BITS 32
-# include "check-localplt.c"
-
-# define BITS 64
-# include "check-localplt.c"
-
-
-static int
-handle_file (const char *fname)
-{
- int fd = open (fname, O_RDONLY);
- if (fd == -1)
- {
- printf ("cannot open %s: %m\n", fname);
- return 1;
- }
-
- /* Read was is supposed to be the ELF header. Read the initial
- bytes to determine whether this is a 32 or 64 bit file. */
- char ident[EI_NIDENT];
- if (read (fd, ident, EI_NIDENT) != EI_NIDENT)
- {
- printf ("%s: read error: %m\n", fname);
- close (fd);
- return 1;
- }
-
- if (memcmp (&ident[EI_MAG0], ELFMAG, SELFMAG) != 0)
- {
- printf ("%s: not an ELF file\n", fname);
- close (fd);
- return 1;
- }
-
- int result;
- if (ident[EI_CLASS] == ELFCLASS64)
- result = handle_file64 (fname, fd);
- else
- result = handle_file32 (fname, fd);
-
- close (fd);
-
- return result;
-}
-
-
-int
-main (int argc, char *argv[])
-{
- int cnt;
- int result = 0;
-
- for (cnt = 1; cnt < argc; ++cnt)
- result |= handle_file (argv[cnt]);
-
- return result;
-}
-#endif
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