* [PATCH] Fix ppc{32,64} longjmp
@ 2006-09-21 19:12 Jakub Jelinek
0 siblings, 0 replies; only message in thread
From: Jakub Jelinek @ 2006-09-21 19:12 UTC (permalink / raw)
To: Ulrich Drepper; +Cc: Glibc hackers, Dwayne Grant McConnell, Steven Munroe
Hi!
Stack pointer demangling in ppc{32,64} longjmp leaves for one (ppc64; or a couple
(ppc32)) instruction(s) garbage in r1, which is bad if a signal comes in.
Fixed thusly:
2006-09-21 Jakub Jelinek <jakub@redhat.com>
[BZ #3225]
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h (PTR_MANGLE3,
PTR_DEMANGLE3): Define.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h (PTR_MANGLE3,
PTR_DEMANGLE3): Likewise.
* sysdeps/powerpc/powerpc32/__longjmp-common.S (__longjmp): Use it.
* sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S (__longjmp):
Likewise.
* sysdeps/powerpc/powerpc64/__longjmp-common.S (__longjmp): Likewise.
--- libc/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h.jj 2006-01-02 11:39:05.000000000 +0100
+++ libc/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h 2006-09-21 17:46:56.000000000 +0200
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992,1997-2003,2004,2005 Free Software Foundation, Inc.
+/* Copyright (C) 1992,1997-2003,2004,2005,2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -285,8 +285,12 @@
xor reg,tmpreg,reg
# define PTR_MANGLE2(reg, tmpreg) \
xor reg,tmpreg,reg
+# define PTR_MANGLE3(destreg, reg, tmpreg) \
+ lwz tmpreg,POINTER_GUARD(r2); \
+ xor destreg,tmpreg,reg
# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
+# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
# else
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
--- libc/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h.jj 2006-01-11 16:55:32.000000000 +0100
+++ libc/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h 2006-09-21 17:47:49.000000000 +0200
@@ -299,8 +299,12 @@
xor reg,tmpreg,reg
# define PTR_MANGLE2(reg, tmpreg) \
xor reg,tmpreg,reg
+# define PTR_MANGLE3(destreg, reg, tmpreg) \
+ ld tmpreg,POINTER_GUARD(r13); \
+ xor destreg,tmpreg,reg
# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
+# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
# else
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
--- libc/sysdeps/powerpc/powerpc32/__longjmp-common.S.jj 2006-01-14 17:41:04.000000000 +0100
+++ libc/sysdeps/powerpc/powerpc32/__longjmp-common.S 2006-09-21 18:03:21.000000000 +0200
@@ -31,7 +31,11 @@
ENTRY (BP_SYM (__longjmp))
CHECK_BOUNDS_BOTH_WIDE_LIT (r3, r8, r9, JB_SIZE)
+#ifdef PTR_DEMANGLE
+ lwz r24,(JB_GPR1*4)(r3)
+#else
lwz r1,(JB_GPR1*4)(r3)
+#endif
lwz r0,(JB_LR*4)(r3)
lwz r14,((JB_GPRS+0)*4)(r3)
lwz r15,((JB_GPRS+1)*4)(r3)
@@ -41,8 +45,8 @@ ENTRY (BP_SYM (__longjmp))
lwz r19,((JB_GPRS+5)*4)(r3)
lwz r20,((JB_GPRS+6)*4)(r3)
#ifdef PTR_DEMANGLE
- PTR_DEMANGLE (r0, r25)
- PTR_DEMANGLE2 (r1, r25)
+ PTR_DEMANGLE3 (r1, r24, r25)
+ PTR_DEMANGLE2 (r0, r25)
#endif
mtlr r0
lwz r21,((JB_GPRS+7)*4)(r3)
--- libc/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S.jj 2006-01-14 17:41:04.000000000 +0100
+++ libc/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S 2006-09-21 18:02:33.000000000 +0200
@@ -114,7 +114,11 @@ aligned_restore_vmx:
lvx v31,0,r6
L(no_vmx):
#endif
+#ifdef PTR_DEMANGLE
+ lwz r24,(JB_GPR1*4)(r3)
+#else
lwz r1,(JB_GPR1*4)(r3)
+#endif
lwz r0,(JB_LR*4)(r3)
lwz r14,((JB_GPRS+0)*4)(r3)
lfd fp14,((JB_FPRS+0*2)*4)(r3)
@@ -131,8 +135,8 @@ L(no_vmx):
lwz r20,((JB_GPRS+6)*4)(r3)
lfd fp20,((JB_FPRS+6*2)*4)(r3)
#ifdef PTR_DEMANGLE
- PTR_DEMANGLE (r0, r25)
- PTR_DEMANGLE2 (r1, r25)
+ PTR_DEMANGLE3 (r1, r24, r25)
+ PTR_DEMANGLE2 (r0, r25)
#endif
mtlr r0
lwz r21,((JB_GPRS+7)*4)(r3)
--- libc/sysdeps/powerpc/powerpc64/__longjmp-common.S.jj 2006-01-14 17:41:04.000000000 +0100
+++ libc/sysdeps/powerpc/powerpc64/__longjmp-common.S 2006-09-21 18:01:05.000000000 +0200
@@ -108,9 +108,11 @@ aligned_restore_vmx:
lvx v31,0,r6
L(no_vmx):
#endif
- ld r1,(JB_GPR1*8)(r3)
#ifdef PTR_DEMANGLE
- PTR_DEMANGLE (r1, r25)
+ ld r22,(JB_GPR1*8)(r3)
+ PTR_DEMANGLE3 (r1, r22, r25)
+#else
+ ld r1,(JB_GPR1*8)(r3)
#endif
ld r2,(JB_GPR2*8)(r3)
ld r0,(JB_LR*8)(r3)
Jakub
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2006-09-21 19:12 [PATCH] Fix ppc{32,64} longjmp Jakub Jelinek
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