From: Paul Clothier <[email protected]> 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 <[email protected]> --- arch/metag/kernel/ptrace.c | 34 ++++++++++++++++++++++++++++++++++ include/uapi/linux/elf.h | 1 + 2 files changed, 35 insertions(+) diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c index 47a8828..7563628 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 = { diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h index 8072d35..ef6103b 100644 --- a/include/uapi/linux/elf.h +++ b/include/uapi/linux/elf.h @@ -397,6 +397,7 @@ typedef struct elf64_shdr { #define NT_ARM_HW_WATCH 0x403 /* ARM hardware watchpoint registers */ #define NT_METAG_CBUF 0x500 /* Metag catch buffer registers */ #define NT_METAG_RPIPE 0x501 /* Metag read pipeline state */ +#define NT_METAG_TLS 0x502 /* Metag TLS pointer */ /* Note header in a PT_NOTE section */ -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
