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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 <khandual@linux.vnet.ibm.com> Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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1 changed files with 117 additions and 0 deletions
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@ -1689,6 +1689,78 @@ static int tm_dscr_set(struct task_struct *target,
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}
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#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
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#ifdef CONFIG_PPC64
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static int ppr_get(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.ppr, 0, sizeof(u64));
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return ret;
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}
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static int ppr_set(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.ppr, 0, sizeof(u64));
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return ret;
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}
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static int dscr_get(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.dscr, 0, sizeof(u64));
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return ret;
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}
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static int dscr_set(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.dscr, 0, sizeof(u64));
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return ret;
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}
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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static int tar_get(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.tar, 0, sizeof(u64));
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return ret;
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}
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static int tar_set(struct task_struct *target,
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const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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int ret;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.tar, 0, sizeof(u64));
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return ret;
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}
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#endif
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/*
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* These are our native regset flavors.
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*/
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@ -1714,6 +1786,13 @@ enum powerpc_regset {
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REGSET_TM_CPPR, /* TM checkpointed PPR register */
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REGSET_TM_CDSCR, /* TM checkpointed DSCR register */
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#endif
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#ifdef CONFIG_PPC64
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REGSET_PPR, /* PPR register */
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REGSET_DSCR, /* DSCR register */
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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REGSET_TAR, /* TAR register */
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#endif
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};
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static const struct user_regset native_regsets[] = {
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@ -1790,6 +1869,25 @@ static const struct user_regset native_regsets[] = {
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.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
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},
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#endif
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#ifdef CONFIG_PPC64
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[REGSET_PPR] = {
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.core_note_type = NT_PPC_PPR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = ppr_get, .set = ppr_set
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},
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[REGSET_DSCR] = {
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.core_note_type = NT_PPC_DSCR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = dscr_get, .set = dscr_set
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},
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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[REGSET_TAR] = {
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.core_note_type = NT_PPC_TAR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = tar_get, .set = tar_set
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},
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#endif
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};
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static const struct user_regset_view user_ppc_native_view = {
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@ -2057,6 +2155,25 @@ static const struct user_regset compat_regsets[] = {
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.active = tm_dscr_active, .get = tm_dscr_get, .set = tm_dscr_set
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},
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#endif
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#ifdef CONFIG_PPC64
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[REGSET_PPR] = {
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.core_note_type = NT_PPC_PPR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = ppr_get, .set = ppr_set
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},
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[REGSET_DSCR] = {
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.core_note_type = NT_PPC_DSCR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = dscr_get, .set = dscr_set
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},
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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[REGSET_TAR] = {
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.core_note_type = NT_PPC_TAR, .n = 1,
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.size = sizeof(u64), .align = sizeof(u64),
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.get = tar_get, .set = tar_set
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},
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#endif
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};
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static const struct user_regset_view user_ppc_compat_view = {
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