From 94ea09c6a8e6c5ffb59bb1d5ca10008d37544e1a Mon Sep 17 00:00:00 2001 From: Daniel Kalmar Date: Fri, 13 May 2011 08:38:04 -0400 Subject: MIPS: Add new unwind_stack variant The unwind_stack_by_address variant supports unwinding based on any kernel code address. This symbol is also exported so it can be called from modules. Signed-off-by: Daniel Kalmar Signed-off-by: Gergely Kis Signed-off-by: Robert Richter --- arch/mips/kernel/process.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) (limited to 'arch/mips/kernel/process.c') diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index d2112d3cf115..c28fbe6107bc 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -373,18 +373,18 @@ unsigned long thread_saved_pc(struct task_struct *tsk) #ifdef CONFIG_KALLSYMS -/* used by show_backtrace() */ -unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, - unsigned long pc, unsigned long *ra) +/* generic stack unwinding function */ +unsigned long notrace unwind_stack_by_address(unsigned long stack_page, + unsigned long *sp, + unsigned long pc, + unsigned long *ra) { - unsigned long stack_page; struct mips_frame_info info; unsigned long size, ofs; int leaf; extern void ret_from_irq(void); extern void ret_from_exception(void); - stack_page = (unsigned long)task_stack_page(task); if (!stack_page) return 0; @@ -443,6 +443,15 @@ unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, *ra = 0; return __kernel_text_address(pc) ? pc : 0; } +EXPORT_SYMBOL(unwind_stack_by_address); + +/* used by show_backtrace() */ +unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, + unsigned long pc, unsigned long *ra) +{ + unsigned long stack_page = (unsigned long)task_stack_page(task); + return unwind_stack_by_address(stack_page, sp, pc, ra); +} #endif /* -- cgit v1.2.3 From 3a7136602b6fcb27073a241006cd5d029cacfafa Mon Sep 17 00:00:00 2001 From: Mathias Krause Date: Fri, 10 Jun 2011 15:10:04 +0200 Subject: MIPS: Remove redundant addr_limit assignment on exec. The address limit is already set in flush_old_exec() via set_fs(USER_DS) so this assignment is redundant. [ralf@linux-mips.org: also see dac853ae89043f1b7752875300faf614de43c74b for further explanation.] Signed-off-by: Mathias Krause Cc: Andrew Morton Cc: Linus Torvalds Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/2466/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/process.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/mips/kernel/process.c') diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index d2112d3cf115..a8d53e508bb7 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -103,7 +103,6 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp) __init_dsp(); regs->cp0_epc = pc; regs->regs[29] = sp; - current_thread_info()->addr_limit = USER_DS; } void exit_thread(void) -- cgit v1.2.3