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hppa: Fix miscompilation of sched_setaffinity() [BZ #18480] 

The attached change fixes the miscompilation of sched_setaffinity() on
hppa.  This is an old problem that was fixed on other architectures using
a similar approach to the attached change.  See:
https://sourceware.org/ml/libc-hacker/2004-04/msg00016.html

Build tested on trunk.  Patch has been applied to debian glibc for some time.
This commit is contained in:
John David Anglin 2015-08-07 11:54:19 -04:00 committed by Mike Frysinger
parent a601b74d31
commit 04ece7d2de
4 changed files with 56 additions and 23 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2015-08-09 John David Anglin <danglin@gcc.gnu.org>
[BZ #18480]
* sysdeps/unix/sysv/linux/hppa/sysdep.h (LOAD_ARGS_0, LOAD_ARGS_1,
LOAD_ARGS_2, LOAD_ARGS_3, LOAD_ARGS_4, LOAD_ARGS_5, LOAD_ARGS_6):
Define.
(LOAD_REGS_0, LOAD_REGS_1, LOAD_REGS_2, LOAD_REGS_3, LOAD_REGS_4,
LOAD_REGS_5, LOAD_REGS_6): Update.
(INTERNAL_SYSCALL): Update using new LOAD defines.
(INTERNAL_SYSCALL_NCS): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscall.c (syscall): Likewise.
2015-08-08 Paul Pluzhnikov <ppluzhnikov@google.com>
[BZ #16734]

3
NEWS
View File

@ -8,7 +8,8 @@ using `glibc' in the "product" field.
Version 2.23
* The following bugs are resolved with this release:
16517, 16519, 17905, 18265, 18525, 18618, 18647, 18661, 18787.
16517, 16519, 17905, 18480, 18265, 18525, 18618, 18647, 18661, 18787.
Version 2.22

3
sysdeps/unix/sysv/linux/hppa/syscall.c
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@ -43,9 +43,10 @@ syscall (long int __sysno, ...)
va_end (args);
{
LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5)
register unsigned long int __res asm("r28");
PIC_REG_DEF
LOAD_ARGS_6 (arg0, arg1, arg2, arg3, arg4, arg5)
LOAD_REGS_6
asm volatile (SAVE_ASM_PIC
" ble 0x100(%%sr2, %%r0) \n"
" copy %1, %%r20 \n"

61
sysdeps/unix/sysv/linux/hppa/sysdep.h
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@ -400,9 +400,10 @@ L(pre_end): ASM_LINE_SEP \
({ \
long __sys_res; \
{ \
LOAD_ARGS_##nr(args) \
register unsigned long __res asm("r28"); \
PIC_REG_DEF \
LOAD_ARGS_##nr(args) \
LOAD_REGS_##nr \
/* FIXME: HACK save/load r19 around syscall */ \
asm volatile( \
SAVE_ASM_PIC \
@ -425,9 +426,10 @@ L(pre_end): ASM_LINE_SEP \
({ \
long __sys_res; \
{ \
LOAD_ARGS_##nr(args) \
register unsigned long __res asm("r28"); \
PIC_REG_DEF \
LOAD_ARGS_##nr(args) \
LOAD_REGS_##nr \
/* FIXME: HACK save/load r19 around syscall */ \
asm volatile( \
SAVE_ASM_PIC \
@ -443,27 +445,44 @@ L(pre_end): ASM_LINE_SEP \
__sys_res; \
})
#define LOAD_ARGS_0()
#define LOAD_ARGS_1(r26) \
register unsigned long __r26 __asm__("r26") = (unsigned long)(r26); \
#define LOAD_REGS_0
#define LOAD_ARGS_1(a1) \
register unsigned long __x26 = (unsigned long)(a1); \
LOAD_ARGS_0()
#define LOAD_ARGS_2(r26,r25) \
register unsigned long __r25 __asm__("r25") = (unsigned long)(r25); \
LOAD_ARGS_1(r26)
#define LOAD_ARGS_3(r26,r25,r24) \
register unsigned long __r24 __asm__("r24") = (unsigned long)(r24); \
LOAD_ARGS_2(r26,r25)
#define LOAD_ARGS_4(r26,r25,r24,r23) \
register unsigned long __r23 __asm__("r23") = (unsigned long)(r23); \
LOAD_ARGS_3(r26,r25,r24)
#define LOAD_ARGS_5(r26,r25,r24,r23,r22) \
register unsigned long __r22 __asm__("r22") = (unsigned long)(r22); \
LOAD_ARGS_4(r26,r25,r24,r23)
#define LOAD_ARGS_6(r26,r25,r24,r23,r22,r21) \
register unsigned long __r21 __asm__("r21") = (unsigned long)(r21); \
LOAD_ARGS_5(r26,r25,r24,r23,r22)
#define LOAD_REGS_1 \
register unsigned long __r26 __asm__("r26") = __x26; \
LOAD_REGS_0
#define LOAD_ARGS_2(a1,a2) \
register unsigned long __x25 = (unsigned long)(a2); \
LOAD_ARGS_1(a1)
#define LOAD_REGS_2 \
register unsigned long __r25 __asm__("r25") = __x25; \
LOAD_REGS_1
#define LOAD_ARGS_3(a1,a2,a3) \
register unsigned long __x24 = (unsigned long)(a3); \
LOAD_ARGS_2(a1,a2)
#define LOAD_REGS_3 \
register unsigned long __r24 __asm__("r24") = __x24; \
LOAD_REGS_2
#define LOAD_ARGS_4(a1,a2,a3,a4) \
register unsigned long __x23 = (unsigned long)(a4); \
LOAD_ARGS_3(a1,a2,a3)
#define LOAD_REGS_4 \
register unsigned long __r23 __asm__("r23") = __x23; \
LOAD_REGS_3
#define LOAD_ARGS_5(a1,a2,a3,a4,a5) \
register unsigned long __x22 = (unsigned long)(a5); \
LOAD_ARGS_4(a1,a2,a3,a4)
#define LOAD_REGS_5 \
register unsigned long __r22 __asm__("r22") = __x22; \
LOAD_REGS_4
#define LOAD_ARGS_6(a1,a2,a3,a4,a5,a6) \
register unsigned long __x21 = (unsigned long)(a6); \
LOAD_ARGS_5(a1,a2,a3,a4,a5)
#define LOAD_REGS_6 \
register unsigned long __r21 __asm__("r21") = __x21; \
LOAD_REGS_5
/* Even with zero args we use r20 for the syscall number */
#define ASM_ARGS_0