diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2005-06-15 13:00:12 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2005-10-29 19:31:23 +0100 |
| commit | 02416dcf5a94af34bcd28b4baf25bbbf399d8136 (patch) | |
| tree | 1906c4266d4e28ef0b13d0579a145603dcbcff1b /arch/mips/kernel/signal-common.h | |
| parent | aac8aa7717a23a9bf8740dbfb59755b1d62f04bf (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.h | 34 |
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; } |