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* Support executables without a .dynamic section (klcc generates

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'em).
This commit is contained in:
Eelco Dolstra
2008-05-28 14:31:08 +00:00
parent 59f7b9a4d0
commit 0c5f99f90a
1 changed files with 36 additions and 33 deletions
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69
src/patchelf.cc
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@@ -736,39 +736,42 @@ void ElfFile<ElfFileParamNames>::rewriteHeaders(Elf_Addr phdrAddress)
/* Update all those nasty virtual addresses in the .dynamic
section. */
Elf_Shdr & shdrDynamic = findSection(".dynamic");
Elf_Dyn * dyn = (Elf_Dyn *) (contents + rdi(shdrDynamic.sh_offset));
unsigned int d_tag;
for ( ; (d_tag = rdi(dyn->d_tag)) != DT_NULL; dyn++)
if (d_tag == DT_STRTAB)
dyn->d_un.d_ptr = findSection(".dynstr").sh_addr;
else if (d_tag == DT_STRSZ)
dyn->d_un.d_val = findSection(".dynstr").sh_size;
else if (d_tag == DT_SYMTAB)
dyn->d_un.d_ptr = findSection(".dynsym").sh_addr;
else if (d_tag == DT_HASH)
dyn->d_un.d_ptr = findSection(".hash").sh_addr;
else if (d_tag == DT_JMPREL) {
Elf_Shdr * shdr = findSection2(".rel.plt");
if (!shdr) shdr = findSection2(".rela.plt"); /* 64-bit Linux, x86-64 */
if (!shdr) shdr = findSection2(".rela.IA_64.pltoff"); /* 64-bit Linux, IA-64 */
if (!shdr) error("cannot find section corresponding to DT_JMPREL");
dyn->d_un.d_ptr = shdr->sh_addr;
}
else if (d_tag == DT_REL) { /* !!! hack! */
Elf_Shdr * shdr = findSection2(".rel.dyn");
/* no idea if this makes sense, but it was needed for some
program */
if (!shdr) shdr = findSection2(".rel.got");
if (!shdr) error("cannot find .rel.dyn or .rel.got");
dyn->d_un.d_ptr = shdr->sh_addr;
}
/* should probably update DT_RELA */
else if (d_tag == DT_VERNEED)
dyn->d_un.d_ptr = findSection(".gnu.version_r").sh_addr;
else if (d_tag == DT_VERSYM)
dyn->d_un.d_ptr = findSection(".gnu.version").sh_addr;
section. Note that not all executables have .dynamic sections
(e.g., those produced by klibc's klcc). */
Elf_Shdr * shdrDynamic = findSection2(".dynamic");
if (shdrDynamic) {
Elf_Dyn * dyn = (Elf_Dyn *) (contents + rdi(shdrDynamic->sh_offset));
unsigned int d_tag;
for ( ; (d_tag = rdi(dyn->d_tag)) != DT_NULL; dyn++)
if (d_tag == DT_STRTAB)
dyn->d_un.d_ptr = findSection(".dynstr").sh_addr;
else if (d_tag == DT_STRSZ)
dyn->d_un.d_val = findSection(".dynstr").sh_size;
else if (d_tag == DT_SYMTAB)
dyn->d_un.d_ptr = findSection(".dynsym").sh_addr;
else if (d_tag == DT_HASH)
dyn->d_un.d_ptr = findSection(".hash").sh_addr;
else if (d_tag == DT_JMPREL) {
Elf_Shdr * shdr = findSection2(".rel.plt");
if (!shdr) shdr = findSection2(".rela.plt"); /* 64-bit Linux, x86-64 */
if (!shdr) shdr = findSection2(".rela.IA_64.pltoff"); /* 64-bit Linux, IA-64 */
if (!shdr) error("cannot find section corresponding to DT_JMPREL");
dyn->d_un.d_ptr = shdr->sh_addr;
}
else if (d_tag == DT_REL) { /* !!! hack! */
Elf_Shdr * shdr = findSection2(".rel.dyn");
/* no idea if this makes sense, but it was needed for some
program */
if (!shdr) shdr = findSection2(".rel.got");
if (!shdr) error("cannot find .rel.dyn or .rel.got");
dyn->d_un.d_ptr = shdr->sh_addr;
}
/* should probably update DT_RELA */
else if (d_tag == DT_VERNEED)
dyn->d_un.d_ptr = findSection(".gnu.version_r").sh_addr;
else if (d_tag == DT_VERSYM)
dyn->d_un.d_ptr = findSection(".gnu.version").sh_addr;
}
}