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authorDavid S. Miller <davem@davemloft.net>2008-07-31 23:40:46 -0400
committerDavid S. Miller <davem@davemloft.net>2008-07-31 23:40:46 -0400
commit0a4949c4414af2eb91414bcd8e2a8ac3706f7dde (patch)
tree5f05f6f539741587127900bbdd838a2e882fcdbf /arch/sparc64
parentdbf3e950679b2588e554baa4da94c445c7903e24 (diff)
sparc64: Do not clobber %g7 in setcontext() trap.
That's the userland thread register, so we should never try to change it like this. Based upon glibc bug nptl/6577 and suggestions by Jakub Jelinek. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/kernel/signal.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index d1b84456a9ee..ca5a6ae3a6e2 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -2,7 +2,7 @@
2 * arch/sparc64/kernel/signal.c 2 * arch/sparc64/kernel/signal.c
3 * 3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds 4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) 5 * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net)
6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) 6 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) 7 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
@@ -91,7 +91,9 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
91 err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4])); 91 err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
92 err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5])); 92 err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
93 err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6])); 93 err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
94 err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7])); 94
95 /* Skip %g7 as that's the thread register in userspace. */
96
95 err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0])); 97 err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
96 err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1])); 98 err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
97 err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2])); 99 err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));