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--set-soname with .dynstr section resize, proper debug messages

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This commit is contained in:
Chingis Dugarzhapov
2014-04-10 14:31:44 +02:00
parent 0034320810
commit 218d7b48ae
1 changed files with 17 additions and 3 deletions
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20
src/patchelf.cc
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@@ -900,7 +900,7 @@ string ElfFile<ElfFileParamNames>::getSoname()
template<ElfFileParams>
void ElfFile<ElfFileParamNames>::setSoname(const string & newSoname)
{
debug("setting soname to `%s'\n", newSoname.c_str());
debug("setting new soname...\n");
Elf_Shdr & shdrDynStr = findSection(".dynstr");
char * strTab = (char *) contents + rdi(shdrDynStr.sh_offset);
@@ -913,10 +913,24 @@ void ElfFile<ElfFileParamNames>::setSoname(const string & newSoname)
break;
}
}
if (strlen(soname) <= newSoname.size()) {
if (newSoname.size() <= strlen(soname)) {
debug("old soname: `%s', new soname: `%s'\n", soname, newSoname.c_str());
strcpy(soname, newSoname.c_str());
changed = true;
return;
}
else {
/* Grow the .dynstr section to make room for the new DT_SONAME */
debug("new soname is too long, resizing .dynstr section...\n");
string & newDynStr = replaceSection(".dynstr",
rdi(shdrDynStr.sh_size) + newSoname.size() + 1);
setSubstr(newDynStr, rdi(shdrDynStr.sh_size), newSoname + '\0');
/* Update the DT_SONAME entry, if any */
if (dynSoname) {
debug("old soname: `%s', new soname: `%s'\n", soname, newSoname.c_str());
dynSoname->d_un.d_val = shdrDynStr.sh_size;
changed = true;
}
}
}