[PATCH v11 10/27] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR
From: <hidden>
Date: 2016-07-17 02:02:12
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), ptrace support, the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Oleg Nesterov, Linus Torvalds
From: Anshuman Khandual <redacted> 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. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <redacted> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Shuah Khan <redacted> Cc: Anton Blanchard <redacted> Cc: Cyril Bur <redacted> Cc: Anshuman Khandual <redacted> Cc: Simon Guo <redacted> Cc: Ulrich Weigand <redacted> Cc: Michael Neuling <redacted> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Kees Cook <redacted> Cc: Rashmica Gupta <redacted> Cc: Khem Raj <redacted> Cc: Jessica Yu <redacted> Cc: Jiri Kosina <redacted> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Cc: Chris Smart <redacted> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: linux-kselftest@vger.kernel.org Signed-off-by: Anshuman Khandual <redacted> --- arch/powerpc/kernel/ptrace.c | 117 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index f0dcfb5..1a091db 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c@@ -1456,6 +1456,78 @@ 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. */
@@ -1481,6 +1553,13 @@ 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[] = {
@@ -1557,6 +1636,25 @@ 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 = {
@@ -1824,6 +1922,25 @@ 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 = {
--
1.8.3.1