Commit c9692657 authored Oct 09, 2015 by Manjeet Pawar Committed by Will Deacon Oct 12, 2015

arm64: Fix MINSIGSTKSZ and SIGSTKSZ

MINSIGSTKSZ and SIGSTKSZ for ARM64 are not correctly set in latest kernel.
This patch fixes this issue.

This issue is reported in LTP (testcase: sigaltstack02.c).
Testcase failed when sigaltstack() called with stack size "MINSIGSTKSZ - 1"
Since in Glibc-2.22, MINSIGSTKSZ is set to 5120 but in kernel
it is set to 2048 so testcase gets failed.

Testcase Output:
sigaltstack02 1  TPASS  :  stgaltstack() fails, Invalid Flag value,errno:22
sigaltstack02 2  TFAIL  :  sigaltstack() returned 0, expected -1,errno:12

Reported Issue in Glibc Bugzilla:
Bugfix in Glibc-2.22: [Bug 16850]
https://sourceware.org/bugzilla/show_bug.cgi?id=16850



Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com>
Signed-off-by: Manjeet Pawar <manjeet.p@samsung.com>
Signed-off-by: Rohit Thapliyal <r.thapliyal@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent b6dd8e07

arch/arm64/include/uapi/asm/signal.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,9 @@
		/* Required for AArch32 compatibility. */
		#define SA_RESTORER 0x04000000

		#define MINSIGSTKSZ 5120
		#define SIGSTKSZ 16384

		#include <asm-generic/signal.h>

		#endif

include/uapi/asm-generic/signal.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -80,8 +80,10 @@
		* SA_RESTORER 0x04000000
		*/

		#if !defined MINSIGSTKSZ \|\| !defined SIGSTKSZ
		#define MINSIGSTKSZ 2048
		#define SIGSTKSZ 8192
		#endif

		#ifndef __ASSEMBLY__
		typedef struct {