diff options
| author | David Mosberger-Tang <davidm@hpl.hp.com> | 2005-05-06 08:25:00 -0400 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-05-06 13:16:07 -0400 |
| commit | 966dc11fcc48866a24d9b3fd16eeebb3f5e05931 (patch) | |
| tree | 4c374071e47998629495f2934e80d083719090f6 /arch/ia64 | |
| parent | b3214970abbe983cd89842ae24ea00e21bba79f6 (diff) | |
[IA64] Fix stack placement when INIT hits in kernel mode.
Without this patch, the stack is placed _below_ the current task
structure, which is risky at best.
Tony, I think this patch needs to go into 2.6.12, since it fixes a
real bug. Without it, INIT may case secondary errors, which would be
most unpleasant.
Signed-off-by: David Mosberger-Tang <davidm@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/kernel/minstate.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h index 1dbc7b2497c9..f6d8a010d99b 100644 --- a/arch/ia64/kernel/minstate.h +++ b/arch/ia64/kernel/minstate.h | |||
| @@ -41,7 +41,7 @@ | |||
| 41 | (pKStk) addl r3=THIS_CPU(ia64_mca_data),r3;; \ | 41 | (pKStk) addl r3=THIS_CPU(ia64_mca_data),r3;; \ |
| 42 | (pKStk) ld8 r3 = [r3];; \ | 42 | (pKStk) ld8 r3 = [r3];; \ |
| 43 | (pKStk) addl r3=IA64_MCA_CPU_INIT_STACK_OFFSET,r3;; \ | 43 | (pKStk) addl r3=IA64_MCA_CPU_INIT_STACK_OFFSET,r3;; \ |
| 44 | (pKStk) addl sp=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3; \ | 44 | (pKStk) addl r1=IA64_STK_OFFSET-IA64_PT_REGS_SIZE,r3; \ |
| 45 | (pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \ | 45 | (pUStk) mov ar.rsc=0; /* set enforced lazy mode, pl 0, little-endian, loadrs=0 */ \ |
| 46 | (pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of register backing store */ \ | 46 | (pUStk) addl r22=IA64_RBS_OFFSET,r1; /* compute base of register backing store */ \ |
| 47 | ;; \ | 47 | ;; \ |
| @@ -50,7 +50,6 @@ | |||
| 50 | (pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \ | 50 | (pUStk) mov r23=ar.bspstore; /* save ar.bspstore */ \ |
| 51 | (pUStk) dep r22=-1,r22,61,3; /* compute kernel virtual addr of RBS */ \ | 51 | (pUStk) dep r22=-1,r22,61,3; /* compute kernel virtual addr of RBS */ \ |
| 52 | ;; \ | 52 | ;; \ |
| 53 | (pKStk) addl r1=-IA64_PT_REGS_SIZE,r1; /* if in kernel mode, use sp (r12) */ \ | ||
| 54 | (pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \ | 53 | (pUStk) mov ar.bspstore=r22; /* switch to kernel RBS */ \ |
| 55 | ;; \ | 54 | ;; \ |
| 56 | (pUStk) mov r18=ar.bsp; \ | 55 | (pUStk) mov r18=ar.bsp; \ |