diff options
Diffstat (limited to 'libc/bionic/vdso.cpp')
-rw-r--r-- | libc/bionic/vdso.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libc/bionic/vdso.cpp b/libc/bionic/vdso.cpp index d0f01d0a7..0a9a9e540 100644 --- a/libc/bionic/vdso.cpp +++ b/libc/bionic/vdso.cpp @@ -131,6 +131,7 @@ void __libc_init_vdso(libc_globals* globals) { for (size_t i = 0; i < vdso_ehdr->e_shnum; ++i) { if (vdso_shdr[i].sh_type == SHT_DYNSYM) { symbol_count = vdso_shdr[i].sh_size / sizeof(ElfW(Sym)); + break; } } if (symbol_count == 0) { @@ -147,6 +148,7 @@ void __libc_init_vdso(libc_globals* globals) { } else if (vdso_phdr[i].p_type == PT_LOAD) { vdso_addr = vdso_ehdr_addr + vdso_phdr[i].p_offset - vdso_phdr[i].p_vaddr; } + if (vdso_addr && vdso_dyn) break; } if (vdso_addr == 0 || vdso_dyn == nullptr) { return; @@ -161,16 +163,18 @@ void __libc_init_vdso(libc_globals* globals) { } else if (d->d_tag == DT_SYMTAB) { symtab = reinterpret_cast<ElfW(Sym)*>(vdso_addr + d->d_un.d_ptr); } + if (strtab && symtab) break; } if (strtab == nullptr || symtab == nullptr) { return; } // Are there any symbols we want? - for (size_t i = 0; i < symbol_count; ++i) { - for (size_t j = 0; j < VDSO_END; ++j) { - if (strcmp(vdso[j].name, strtab + symtab[i].st_name) == 0) { - vdso[j].fn = reinterpret_cast<void*>(vdso_addr + symtab[i].st_value); + for (size_t i = 0; i < VDSO_END; ++i) { + for (size_t j = 0; j < symbol_count; ++j) { + if (strcmp(vdso[i].name, strtab + symtab[j].st_name) == 0) { + vdso[i].fn = reinterpret_cast<void*>(vdso_addr + symtab[j].st_value); + break; } } } |