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authorPaul Clothier <Paul.Clothier@imgtec.com>2013-03-19 12:04:43 +0000
committerJames Hogan <james.hogan@imgtec.com>2013-03-27 14:37:47 +0000
commit876d6dcdf26a2e860801ec61195e580d03f7b204 (patch)
tree33f1145d6f524c75128747c90206ea70487f3b09 /arch/metag
parent2b8660ed3bfe95523561e6d6a6f1ce91389006b1 (diff)
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metag: ptrace: Implement NT_METAG_TLS
Implement functionality to get the TLS pointer for the metag architecture using regsets. This provides multi-threaded debug support for GDB. Signed-off-by: Paul Clothier <Paul.Clothier@imgtec.com> Signed-off-by: James Hogan <james.hogan@imgtec.com>
Diffstat (limited to 'arch/metag')
-rw-r--r--arch/metag/kernel/ptrace.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c
index 47a8828615a5..7563628822bd 100644
--- a/arch/metag/kernel/ptrace.c
+++ b/arch/metag/kernel/ptrace.c
@@ -288,10 +288,36 @@ static int metag_rp_state_set(struct task_struct *target,
return metag_rp_state_copyin(regs, pos, count, kbuf, ubuf);
}
+static int metag_tls_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ void __user *tls = target->thread.tls_ptr;
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
+}
+
+static int metag_tls_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+ void __user *tls;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
+ if (ret)
+ return ret;
+
+ target->thread.tls_ptr = tls;
+ return ret;
+}
+
enum metag_regset {
REGSET_GENERAL,
REGSET_CBUF,
REGSET_READPIPE,
+ REGSET_TLS,
};
static const struct user_regset metag_regsets[] = {
@@ -319,6 +345,14 @@ static const struct user_regset metag_regsets[] = {
.get = metag_rp_state_get,
.set = metag_rp_state_set,
},
+ [REGSET_TLS] = {
+ .core_note_type = NT_METAG_TLS,
+ .n = 1,
+ .size = sizeof(void *),
+ .align = sizeof(void *),
+ .get = metag_tls_get,
+ .set = metag_tls_set,
+ },
};
static const struct user_regset_view user_metag_view = {