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| author | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-10 21:00:00 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-10 21:00:00 +0300 |
| commit | edb16bec41db68b22799a5fbad82c3891e637565 (patch) | |
| tree | d019d2fa8fbf374d810f66e1a210648e53b0c593 /arch/sparc64/kernel/rtrap.S | |
| parent | bb7320d1d96dc2e479180ae8e7a112caf0726ace (diff) | |
| parent | f0882589666440d573f657cb3a1d5f66f3caa157 (diff) | |
| download | linux-edb16bec41db68b22799a5fbad82c3891e637565.tar.xz | |
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Fix several kprobes bugs.
[SPARC64]: Update defconfig.
[SPARC64]: dma remove extra brackets
[SPARC{32,64}]: Propagate ptrace_traceme() return value.
[SPARC64]: Replace kmalloc+memset with kzalloc
[SPARC]: Check kzalloc() return value in SUN4D irq/iommu init.
[SPARC]: Replace kmalloc+memset with kzalloc
[SPARC64]: Run ctrl-alt-del action for sun4v powerdown request.
[SPARC64]: Unaligned accesses to userspace are hard errors.
[SPARC64]: Call do_mathemu on illegal instruction traps too.
[SPARC64]: Update defconfig.
[SPARC64]: Add irqtrace/stacktrace/lockdep support.
Diffstat (limited to 'arch/sparc64/kernel/rtrap.S')
| -rw-r--r-- | arch/sparc64/kernel/rtrap.S | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index 3522cd66f3bb..079d18a11d24 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -165,14 +165,26 @@ rtrap: __handle_softirq_continue: rtrap_xcall: sethi %hi(0xf << 20), %l4 - andcc %l1, TSTATE_PRIV, %l3 and %l1, %l4, %l4 + andn %l1, %l4, %l1 + srl %l4, 20, %l4 +#ifdef CONFIG_TRACE_IRQFLAGS + brnz,pn %l4, rtrap_no_irq_enable + nop + call trace_hardirqs_on + nop + wrpr %l4, %pil +rtrap_no_irq_enable: +#endif + andcc %l1, TSTATE_PRIV, %l3 bne,pn %icc, to_kernel - andn %l1, %l4, %l1 + nop /* We must hold IRQs off and atomically test schedule+signal * state, then hold them off all the way back to userspace. - * If we are returning to kernel, none of this matters. + * If we are returning to kernel, none of this matters. Note + * that we are disabling interrupts via PSTATE_IE, not using + * %pil. * * If we do not do this, there is a window where we would do * the tests, later the signal/resched event arrives but we do @@ -256,7 +268,6 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 ld [%sp + PTREGS_OFF + PT_V9_Y], %o3 wr %o3, %g0, %y - srl %l4, 20, %l4 wrpr %l4, 0x0, %pil wrpr %g0, 0x1, %tl wrpr %l1, %g0, %tstate @@ -374,8 +385,8 @@ to_kernel: ldx [%g6 + TI_FLAGS], %l5 andcc %l5, _TIF_NEED_RESCHED, %g0 be,pt %xcc, kern_fpucheck - srl %l4, 20, %l5 - cmp %l5, 0 + nop + cmp %l4, 0 bne,pn %xcc, kern_fpucheck sethi %hi(PREEMPT_ACTIVE), %l6 stw %l6, [%g6 + TI_PRE_COUNT] |