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powerpc: Fix VSCR position in ucontext (bug 24088)

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This patch fix VSCR position on ucontext. VSCR was read in the wrong
position on ucontext structure because it was ignoring the machine
endianess.

	[BZ #24088]
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h (vscr_t): Added
	ifdef to fix read of VSCR.
	* sysdeps/powerpc/powerpc64/Makefile [$subdir == stdlib]: Add
	tst-ucontext-ppc64-vscr.c to test list.
	* sysdeps/powerpc/powerpc64/tst-ucontext-ppc64-vscr.c: New test file.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
Rogerio Alves
2018-11-05 10:18:38 -06:00
committed by Tulio Magno Quites Machado Filho
parent 5494af04ad
commit 0bc9bdf159
4 changed files with 102 additions and 0 deletions
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5
sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
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@@ -98,8 +98,13 @@ typedef double fpregset_t[__NFPREG];
a whole quadword speedup save/restore. */
typedef struct _libc_vscr
{
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
unsigned int __pad[3];
unsigned int __ctx(vscr_word);
#else
unsigned int __ctx(vscr_word);
unsigned int __pad[3];
#endif
} vscr_t;
/* Container for Altivec/VMX registers and status.