diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-09-19 20:11:23 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-09-19 20:11:23 +0000 |
| commit | a2f83ef51654bb8bf88b0d55c5978c3d7c58838c (patch) | |
| tree | 7b2582692bb603268a507a8a311cdda5b5dcfc10 /lib | |
| parent | c7ccd4e2c552590c4f24d00b0b1a1cdf23abad9b (diff) | |
Make sure we set PROT_EXEC on the GOT for BSS-PLT binaries on powerpc.
ok guenther@
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/csu/boot.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/csu/boot.h b/lib/csu/boot.h index 1af62c3e0e1..ee8e7b91c65 100644 --- a/lib/csu/boot.h +++ b/lib/csu/boot.h @@ -1,4 +1,4 @@ -/* $OpenBSD: boot.h,v 1.12 2015/08/17 17:13:58 kettenis Exp $ */ +/* $OpenBSD: boot.h,v 1.13 2015/09/19 20:11:22 kettenis Exp $ */ /* * Copyright (c) 1998 Per Fogelstrom, Opsycon AB @@ -50,6 +50,8 @@ #include "stdlib.h" #include "dl_prebind.h" +#define DT_PROC(n) ((n) - DT_LOPROC + DT_NUM) + #ifdef RCRT0 /* @@ -75,6 +77,7 @@ _dl_boot_bind(const long sp, long *dl_data, Elf_Dyn *dynamicp) int n, argc; char **argv, **envp; long loff; + int prot_exec = 0; /* * Scan argument and environment vectors. Find dynamic @@ -287,9 +290,14 @@ _dl_boot_bind(const long sp, long *dl_data, Elf_Dyn *dynamicp) mprotect((void *)start, size, PROT_READ); #endif +#if defined(__powerpc__) + if (dynld.Dyn.info[DT_PROC(DT_PPC_GOT)] == 0) + prot_exec = PROT_EXEC; +#endif + start = ELF_TRUNC((Elf_Addr)__got_start, pagesize); size = ELF_ROUND((Elf_Addr)__got_end - start, pagesize); - mprotect((void *)start, size, GOT_PERMS); + mprotect((void *)start, size, GOT_PERMS | prot_exec); } #ifdef __alpha__ |