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authorRalf Baechle <ralf@linux-mips.org>2005-06-15 13:00:12 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:31:23 +0100
commit02416dcf5a94af34bcd28b4baf25bbbf399d8136 (patch)
tree1906c4266d4e28ef0b13d0579a145603dcbcff1b /arch/mips/kernel/signal-common.h
parentaac8aa7717a23a9bf8740dbfb59755b1d62f04bf (diff)
Redo RM9000 workaround which along with other DSP ASE changes was
causing some headache for debuggers knowing about signal frames. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/signal-common.h')
-rw-r--r--arch/mips/kernel/signal-common.h34
1 files changed, 28 insertions, 6 deletions
diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index 3208ff528cd..0f66ae5838b 100644
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -160,7 +160,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
- unsigned long sp, almask;
+ unsigned long sp;
/* Default to using normal stack */
sp = regs->regs[29];
@@ -176,10 +176,32 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
sp = current->sas_ss_sp + current->sas_ss_size;
- if (PLAT_TRAMPOLINE_STUFF_LINE)
- almask = ~(PLAT_TRAMPOLINE_STUFF_LINE - 1);
- else
- almask = ALMASK;
+ return (void *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? 32 : ALMASK));
+}
+
+static inline int install_sigtramp(unsigned int __user *tramp,
+ unsigned int syscall)
+{
+ int err;
- return (void *)((sp - frame_size) & almask);
+ /*
+ * Set up the return code ...
+ *
+ * li v0, __NR__foo_sigreturn
+ * syscall
+ */
+
+ err = __put_user(0x24020000 + syscall, tramp + 0);
+ err |= __put_user(0x0000000c , tramp + 1);
+ if (ICACHE_REFILLS_WORKAROUND_WAR) {
+ err |= __put_user(0, tramp + 2);
+ err |= __put_user(0, tramp + 3);
+ err |= __put_user(0, tramp + 4);
+ err |= __put_user(0, tramp + 5);
+ err |= __put_user(0, tramp + 6);
+ err |= __put_user(0, tramp + 7);
+ }
+ flush_cache_sigtramp((unsigned long) tramp);
+
+ return err;
}