From 876d6dcdf26a2e860801ec61195e580d03f7b204 Mon Sep 17 00:00:00 2001 From: Paul Clothier Date: Tue, 19 Mar 2013 12:04:43 +0000 Subject: 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 Signed-off-by: James Hogan --- arch/metag/kernel/ptrace.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'arch/metag') 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 = { -- cgit v1.2.3