summaryrefslogtreecommitdiff
path: root/arch/blackfin
diff options
context:
space:
mode:
authorBarry Song <barry.song@analog.com>2010-06-21 10:19:50 (GMT)
committerMike Frysinger <vapier@gentoo.org>2010-10-22 07:48:52 (GMT)
commit175671e75c54cf4b17c71d9c99151dd5635964b1 (patch)
tree61f3709e2a96a754ba140367435cf8e7f4cfc5da /arch/blackfin
parentc5af5451fcf97f38f0c79cbb9f929af2779f234d (diff)
downloadlinux-fsl-qoriq-175671e75c54cf4b17c71d9c99151dd5635964b1.tar.xz
Blackfin: ptrace: enable access to L1 stacks
If an app is placing its stack in L1 scratchpad SRAM, make sure ptrace is granted access to it so that gdb can do its thing. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/ptrace.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index 6ec7768..d890c1e 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -27,6 +27,7 @@
#include <asm/fixed_code.h>
#include <asm/cacheflush.h>
#include <asm/mem_map.h>
+#include <asm/mmu_context.h>
/*
* does not yet catch signals sent when the child dies.
@@ -135,6 +136,13 @@ static inline int is_user_addr_valid(struct task_struct *child,
if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)
return 0;
+#ifdef CONFIG_APP_STACK_L1
+ if (child->mm->context.l1_stack_save)
+ if (start >= (unsigned long)l1_stack_base &&
+ start + len < (unsigned long)l1_stack_base + l1_stack_len)
+ return 0;
+#endif
+
return -EIO;
}