From fa439810cc1b3c927ec24ede17d02467e1b143a1 Mon Sep 17 00:00:00 2001 From: Anshuman Khandual Date: Thu, 28 Jul 2016 10:57:42 +0800 Subject: powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR This patch enables support for running TAR, PPR, DSCR registers related ELF core notes NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR based ptrace requests through PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved through adding three new register sets REGSET_TAR, REGSET_PPR, REGSET_DSCR in powerpc corresponding to the ELF core note sections added in this regad. It implements the get, set and active functions for all these new register sets added. Signed-off-by: Anshuman Khandual Signed-off-by: Simon Guo Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/ptrace.c | 117 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) (limited to 'arch/powerpc/kernel/ptrace.c') diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index a81e2d7cbdb9..a1e166ae4b14 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -1689,6 +1689,78 @@ static int tm_dscr_set(struct task_struct *target, } #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ +#ifdef CONFIG_PPC64 +static int ppr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.ppr, 0, sizeof(u64)); + return ret; +} + +static int ppr_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; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.ppr, 0, sizeof(u64)); + return ret; +} + +static int dscr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.dscr, 0, sizeof(u64)); + return ret; +} +static int dscr_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; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.dscr, 0, sizeof(u64)); + return ret; +} +#endif +#ifdef CONFIG_PPC_BOOK3S_64 +static int tar_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user *ubuf) +{ + int ret; + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, + &target->thread.tar, 0, sizeof(u64)); + return ret; +} +static int tar_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; + + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.tar, 0, sizeof(u64)); + return ret; +} +#endif /* * These are our native regset flavors. */ @@ -1714,6 +1786,13 @@ enum powerpc_regset { REGSET_TM_CPPR, /* TM checkpointed PPR register */ REGSET_TM_CDSCR, /* TM checkpointed DSCR register */ #endif +#ifdef CONFIG_PPC64 + REGSET_PPR, /* PPR register */ + REGSET_DSCR, /* DSCR register */ +#endif +#ifdef CONFIG_PPC_BOOK3S_64 + REGSET_TAR, /* TAR register */ +#endif }; static const struct user_regset native_regsets[] = { @@ -1790,6 +1869,25 @@ static const struct user_regset native_regsets[] = { .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set }, #endif +#ifdef CONFIG_PPC64 + [REGSET_PPR] = { + .core_note_type = NT_PPC_PPR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = ppr_get, .set = ppr_set + }, + [REGSET_DSCR] = { + .core_note_type = NT_PPC_DSCR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = dscr_get, .set = dscr_set + }, +#endif +#ifdef CONFIG_PPC_BOOK3S_64 + [REGSET_TAR] = { + .core_note_type = NT_PPC_TAR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = tar_get, .set = tar_set + }, +#endif }; static const struct user_regset_view user_ppc_native_view = { @@ -2057,6 +2155,25 @@ static const struct user_regset compat_regsets[] = { .active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set }, #endif +#ifdef CONFIG_PPC64 + [REGSET_PPR] = { + .core_note_type = NT_PPC_PPR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = ppr_get, .set = ppr_set + }, + [REGSET_DSCR] = { + .core_note_type = NT_PPC_DSCR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = dscr_get, .set = dscr_set + }, +#endif +#ifdef CONFIG_PPC_BOOK3S_64 + [REGSET_TAR] = { + .core_note_type = NT_PPC_TAR, .n = 1, + .size = sizeof(u64), .align = sizeof(u64), + .get = tar_get, .set = tar_set + }, +#endif }; static const struct user_regset_view user_ppc_compat_view = { -- cgit v1.2.3