crosstool-ng: patches/glibc/2.9/380-2.3.6-dl_execstack-PaX-support.patch@5e5d1e6f55d3 (annotated)

yann@1365	1	Original patch from: gentoo/src/patchsets/glibc/2.9/3000_all_2.3.6-dl_execstack-PaX-support.patch
yann@1365	2
yann@1365	3	-= BEGIN original header =-
yann@1365	4	With latest versions of glibc, a lot of apps failed on a PaX enabled
yann@1365	5	system with:
yann@1365	6	cannot enable executable stack as shared object requires: Permission denied
yann@1365	7
yann@1365	8	This is due to PaX 'exec-protecting' the stack, and ld.so then trying
yann@1365	9	to make the stack executable due to some libraries not containing the
yann@1365	10	PT_GNU_STACK section. Bug #32960. <azarah@gentoo.org> (12 Nov 2003).
yann@1365	11
yann@1365	12	Patch also NPTL. Bug #116086. <kevquinn@gentoo.org> (20 Dec 2005).
yann@1365	13
yann@1365	14	-= END original header =-
yann@1365	15
yann@1365	16	diff -durN glibc-2_9.orig/nptl/allocatestack.c glibc-2_9/nptl/allocatestack.c
yann@1365	17	--- glibc-2_9.orig/nptl/allocatestack.c 2008-08-16 00:35:27.000000000 +0200
yann@1365	18	+++ glibc-2_9/nptl/allocatestack.c 2009-02-02 22:01:20.000000000 +0100
yann@1365	19	@@ -299,7 +299,8 @@
yann@1365	20	# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
yann@1365	21	#endif
yann@1365	22	if (mprotect (stack, len, PROT_READ \| PROT_WRITE \| PROT_EXEC) != 0)
yann@1365	23	- return errno;
yann@1365	24	+ if (errno != EACCES) /* PAX is enabled */
yann@1365	25	+ return errno;
yann@1365	26
yann@1365	27	return 0;
yann@1365	28	}
yann@1365	29	diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c
yann@1365	30	--- glibc-2_9.orig/sysdeps/unix/sysv/linux/dl-execstack.c 2006-01-08 09:21:15.000000000 +0100
yann@1365	31	+++ glibc-2_9/sysdeps/unix/sysv/linux/dl-execstack.c 2009-02-02 22:01:20.000000000 +0100
yann@1365	32	@@ -63,7 +63,10 @@
yann@1365	33	else
yann@1365	34	# endif
yann@1365	35	{
yann@1365	36	- result = errno;
yann@1365	37	+ if (errno == EACCES) /* PAX is enabled */
yann@1365	38	+ result = 0;
yann@1365	39	+ else
yann@1365	40	+ result = errno;
yann@1365	41	goto out;
yann@1365	42	}
yann@1365	43	}
yann@1365	44	@@ -89,7 +92,12 @@
yann@1365	45	page -= size;
yann@1365	46	else
yann@1365	47	{
yann@1365	48	- if (errno != ENOMEM) /* Unexpected failure mode. */
yann@1365	49	+ if (errno == EACCES) /* PAX is enabled */
yann@1365	50	+ {
yann@1365	51	+ result = 0;
yann@1365	52	+ goto out;
yann@1365	53	+ }
yann@1365	54	+ else if (errno != ENOMEM) /* Unexpected failure mode. */
yann@1365	55	{
yann@1365	56	result = errno;
yann@1365	57	goto out;
yann@1365	58	@@ -115,7 +123,12 @@
yann@1365	59	page += size;
yann@1365	60	else
yann@1365	61	{
yann@1365	62	- if (errno != ENOMEM) /* Unexpected failure mode. */
yann@1365	63	+ if (errno == EACCES) /* PAX is enabled */
yann@1365	64	+ {
yann@1365	65	+ result = 0;
yann@1365	66	+ goto out;
yann@1365	67	+ }
yann@1365	68	+ else if (errno != ENOMEM) /* Unexpected failure mode. */
yann@1365	69	{
yann@1365	70	result = errno;
yann@1365	71	goto out;

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sun May 03 09:50:16 2009 +0000 (2009-05-03)
branch	newlib
changeset 1366	5e5d1e6f55d3
permissions	-rw-r--r--