#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
+#include <linux/regset.h>
+#include <linux/elf.h>
#include <linux/user.h>
#include <linux/security.h>
#include <linux/signal.h>
#include <asm/pgtable.h>
#include <asm/system.h>
-#ifdef CONFIG_PPC64
-#include "ptrace-common.h"
-#endif
+/*
+ * does not yet catch signals sent when the child dies.
+ * in exit.c or in signal.c.
+ */
-#ifdef CONFIG_PPC32
/*
* Set of msr bits that gdb can change on behalf of a process.
*/
#else
#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
#endif
-#endif /* CONFIG_PPC32 */
/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
+ * Max register writeable via put_reg
*/
-
#ifdef CONFIG_PPC32
+#define PT_MAX_PUT_REG PT_MQ
+#else
+#define PT_MAX_PUT_REG PT_CCR
+#endif
+
+static unsigned long get_user_msr(struct task_struct *task)
+{
+ return task->thread.regs->msr | task->thread.fpexc_mode;
+}
+
+static int set_user_msr(struct task_struct *task, unsigned long msr)
+{
+ task->thread.regs->msr &= ~MSR_DEBUGCHANGE;
+ task->thread.regs->msr |= msr & MSR_DEBUGCHANGE;
+ return 0;
+}
+
+/*
+ * We prevent mucking around with the reserved area of trap
+ * which are used internally by the kernel.
+ */
+static int set_user_trap(struct task_struct *task, unsigned long trap)
+{
+ task->thread.regs->trap = trap & 0xfff0;
+ return 0;
+}
+
/*
* Get contents of register REGNO in task TASK.
*/
-static inline unsigned long get_reg(struct task_struct *task, int regno)
+unsigned long ptrace_get_reg(struct task_struct *task, int regno)
{
- if (regno < sizeof(struct pt_regs) / sizeof(unsigned long)
- && task->thread.regs != NULL)
+ if (task->thread.regs == NULL)
+ return -EIO;
+
+ if (regno == PT_MSR)
+ return get_user_msr(task);
+
+ if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long)))
return ((unsigned long *)task->thread.regs)[regno];
- return (0);
+
+ return -EIO;
}
/*
* Write contents of register REGNO in task TASK.
*/
-static inline int put_reg(struct task_struct *task, int regno,
- unsigned long data)
+int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
{
- if (regno <= PT_MQ && task->thread.regs != NULL) {
- if (regno == PT_MSR)
- data = (data & MSR_DEBUGCHANGE)
- | (task->thread.regs->msr & ~MSR_DEBUGCHANGE);
+ if (task->thread.regs == NULL)
+ return -EIO;
+
+ if (regno == PT_MSR)
+ return set_user_msr(task, data);
+ if (regno == PT_TRAP)
+ return set_user_trap(task, data);
+
+ if (regno <= PT_MAX_PUT_REG) {
((unsigned long *)task->thread.regs)[regno] = data;
return 0;
}
return -EIO;
}
-#ifdef CONFIG_ALTIVEC
-/*
- * Get contents of AltiVec register state in task TASK
- */
-static inline int get_vrregs(unsigned long __user *data, struct task_struct *task)
+static int gpr_get(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
{
- int i, j;
+ int ret;
+
+ if (target->thread.regs == NULL)
+ return -EIO;
+
+ CHECK_FULL_REGS(target->thread.regs);
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ target->thread.regs,
+ 0, offsetof(struct pt_regs, msr));
+ if (!ret) {
+ unsigned long msr = get_user_msr(target);
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
+ offsetof(struct pt_regs, msr),
+ offsetof(struct pt_regs, msr) +
+ sizeof(msr));
+ }
- if (!access_ok(VERIFY_WRITE, data, 133 * sizeof(unsigned long)))
- return -EFAULT;
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
- /* copy AltiVec registers VR[0] .. VR[31] */
- for (i = 0; i < 32; i++)
- for (j = 0; j < 4; j++, data++)
- if (__put_user(task->thread.vr[i].u[j], data))
- return -EFAULT;
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.regs->orig_gpr3,
+ offsetof(struct pt_regs, orig_gpr3),
+ sizeof(struct pt_regs));
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
- /* copy VSCR */
- for (i = 0; i < 4; i++, data++)
- if (__put_user(task->thread.vscr.u[i], data))
- return -EFAULT;
+ return ret;
+}
+
+static int gpr_set(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ unsigned long reg;
+ int ret;
+
+ if (target->thread.regs == NULL)
+ return -EIO;
+
+ CHECK_FULL_REGS(target->thread.regs);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ target->thread.regs,
+ 0, PT_MSR * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
+ PT_MSR * sizeof(reg),
+ (PT_MSR + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_msr(target, reg);
+ }
+
+ BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
+ offsetof(struct pt_regs, msr) + sizeof(long));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.regs->orig_gpr3,
+ PT_ORIG_R3 * sizeof(reg),
+ (PT_MAX_PUT_REG + 1) * sizeof(reg));
+
+ if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_MAX_PUT_REG + 1) * sizeof(reg),
+ PT_TRAP * sizeof(reg));
+
+ if (!ret && count > 0) {
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
+ PT_TRAP * sizeof(reg),
+ (PT_TRAP + 1) * sizeof(reg));
+ if (!ret)
+ ret = set_user_trap(target, reg);
+ }
+
+ if (!ret)
+ ret = user_regset_copyin_ignore(
+ &pos, &count, &kbuf, &ubuf,
+ (PT_TRAP + 1) * sizeof(reg), -1);
+
+ return ret;
+}
+
+static int fpr_get(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ flush_fp_to_thread(target);
+
+ BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
+ offsetof(struct thread_struct, fpr[32]));
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fpr, 0, -1);
+}
+
+static int fpr_set(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ flush_fp_to_thread(target);
+
+ BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
+ offsetof(struct thread_struct, fpr[32]));
+
+ return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.fpr, 0, -1);
+}
- /* copy VRSAVE */
- if (__put_user(task->thread.vrsave, data))
+static int get_fpregs(void __user *data, struct task_struct *task,
+ int has_fpscr)
+{
+ unsigned int count = has_fpscr ? 33 : 32;
+ if (!access_ok(VERIFY_WRITE, data, count * sizeof(double)))
return -EFAULT;
+ return fpr_get(task, NULL, 0, count * sizeof(double), NULL, data);
+}
- return 0;
+static int set_fpregs(void __user *data, struct task_struct *task,
+ int has_fpscr)
+{
+ unsigned int count = has_fpscr ? 33 : 32;
+ if (!access_ok(VERIFY_READ, data, count * sizeof(double)))
+ return -EFAULT;
+ return fpr_set(task, NULL, 0, count * sizeof(double), NULL, data);
}
+
+#ifdef CONFIG_ALTIVEC
/*
- * Write contents of AltiVec register state into task TASK.
+ * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
+ * The transfer totals 34 quadword. Quadwords 0-31 contain the
+ * corresponding vector registers. Quadword 32 contains the vscr as the
+ * last word (offset 12) within that quadword. Quadword 33 contains the
+ * vrsave as the first word (offset 0) within the quadword.
+ *
+ * This definition of the VMX state is compatible with the current PPC32
+ * ptrace interface. This allows signal handling and ptrace to use the
+ * same structures. This also simplifies the implementation of a bi-arch
+ * (combined (32- and 64-bit) gdb.
*/
-static inline int set_vrregs(struct task_struct *task, unsigned long __user *data)
+
+static int vr_active(struct task_struct *target,
+ const struct user_regset *regset)
{
- int i, j;
+ flush_altivec_to_thread(target);
+ return target->thread.used_vr ? regset->n : 0;
+}
- if (!access_ok(VERIFY_READ, data, 133 * sizeof(unsigned long)))
- return -EFAULT;
+static int vr_get(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ flush_altivec_to_thread(target);
+
+ BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
+ offsetof(struct thread_struct, vr[32]));
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr, 0,
+ 33 * sizeof(vector128));
+ if (!ret) {
+ /*
+ * Copy out only the low-order word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ }
- /* copy AltiVec registers VR[0] .. VR[31] */
- for (i = 0; i < 32; i++)
- for (j = 0; j < 4; j++, data++)
- if (__get_user(task->thread.vr[i].u[j], data))
- return -EFAULT;
+ return ret;
+}
+
+static int vr_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;
+
+ flush_altivec_to_thread(target);
+
+ BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
+ offsetof(struct thread_struct, vr[32]));
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.vr, 0, 33 * sizeof(vector128));
+ if (!ret && count > 0) {
+ /*
+ * We use only the first word of vrsave.
+ */
+ union {
+ elf_vrreg_t reg;
+ u32 word;
+ } vrsave;
+ memset(&vrsave, 0, sizeof(vrsave));
+ vrsave.word = target->thread.vrsave;
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
+ 33 * sizeof(vector128), -1);
+ if (!ret)
+ target->thread.vrsave = vrsave.word;
+ }
- /* copy VSCR */
- for (i = 0; i < 4; i++, data++)
- if (__get_user(task->thread.vscr.u[i], data))
- return -EFAULT;
+ return ret;
+}
- /* copy VRSAVE */
- if (__get_user(task->thread.vrsave, data))
+/*
+ * Get contents of AltiVec register state in task TASK
+ */
+static int get_vrregs(unsigned long __user *data, struct task_struct *task)
+{
+ if (!access_ok(VERIFY_WRITE, data,
+ 33 * sizeof(vector128) + sizeof(u32)))
return -EFAULT;
- return 0;
+ return vr_get(task, NULL, 0, 33 * sizeof(vector128) + sizeof(u32),
+ NULL, data);
}
-#endif
+
+/*
+ * Write contents of AltiVec register state into task TASK.
+ */
+static int set_vrregs(struct task_struct *task, unsigned long __user *data)
+{
+ if (!access_ok(VERIFY_READ, data, 33 * sizeof(vector128) + sizeof(u32)))
+ return -EFAULT;
+
+ return vr_set(task, NULL, 0, 33 * sizeof(vector128) + sizeof(u32),
+ NULL, data);
+}
+#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_SPE
* }
*/
-/*
- * Get contents of SPE register state in task TASK.
- */
-static inline int get_evrregs(unsigned long *data, struct task_struct *task)
+static int evr_active(struct task_struct *target,
+ const struct user_regset *regset)
{
- int i;
+ flush_spe_to_thread(target);
+ return target->thread.used_spe ? regset->n : 0;
+}
- if (!access_ok(VERIFY_WRITE, data, 35 * sizeof(unsigned long)))
- return -EFAULT;
+static int evr_get(struct task_struct *target, const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
- /* copy SPEFSCR */
- if (__put_user(task->thread.spefscr, &data[34]))
- return -EFAULT;
+ flush_spe_to_thread(target);
- /* copy SPE registers EVR[0] .. EVR[31] */
- for (i = 0; i < 32; i++, data++)
- if (__put_user(task->thread.evr[i], data))
- return -EFAULT;
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.evr,
+ 0, sizeof(target->thread.evr));
- /* copy ACC */
- if (__put_user64(task->thread.acc, (unsigned long long *)data))
- return -EFAULT;
+ BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
+ offsetof(struct thread_struct, spefscr));
- return 0;
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.acc,
+ sizeof(target->thread.evr), -1);
+
+ return ret;
+}
+
+static int evr_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;
+
+ flush_spe_to_thread(target);
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.evr,
+ 0, sizeof(target->thread.evr));
+
+ BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
+ offsetof(struct thread_struct, spefscr));
+
+ if (!ret)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.acc,
+ sizeof(target->thread.evr), -1);
+
+ return ret;
}
/*
- * Write contents of SPE register state into task TASK.
+ * Get contents of SPE register state in task TASK.
*/
-static inline int set_evrregs(struct task_struct *task, unsigned long *data)
+static int get_evrregs(unsigned long __user *data, struct task_struct *task)
{
- int i;
-
- if (!access_ok(VERIFY_READ, data, 35 * sizeof(unsigned long)))
+ if (!access_ok(VERIFY_WRITE, data, 35 * sizeof(u32)))
return -EFAULT;
- /* copy SPEFSCR */
- if (__get_user(task->thread.spefscr, &data[34]))
- return -EFAULT;
+ return evr_get(task, NULL, 0, 35 * sizeof(u32), NULL, data);
+}
- /* copy SPE registers EVR[0] .. EVR[31] */
- for (i = 0; i < 32; i++, data++)
- if (__get_user(task->thread.evr[i], data))
- return -EFAULT;
- /* copy ACC */
- if (__get_user64(task->thread.acc, (unsigned long long*)data))
+/*
+ * Write contents of SPE register state into task TASK.
+ */
+static int set_evrregs(struct task_struct *task, unsigned long *data)
+{
+ if (!access_ok(VERIFY_READ, data, 35 * sizeof(u32)))
return -EFAULT;
- return 0;
+ return evr_set(task, NULL, 0, 35 * sizeof(u32), NULL, data);
}
#endif /* CONFIG_SPE */
-static inline void
-set_single_step(struct task_struct *task)
+
+/*
+ * These are our native regset flavors.
+ */
+enum powerpc_regset {
+ REGSET_GPR,
+ REGSET_FPR,
+#ifdef CONFIG_ALTIVEC
+ REGSET_VMX,
+#endif
+#ifdef CONFIG_SPE
+ REGSET_SPE,
+#endif
+};
+
+static const struct user_regset native_regsets[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
+ .size = sizeof(long), .align = sizeof(long),
+ .get = gpr_get, .set = gpr_set
+ },
+ [REGSET_FPR] = {
+ .core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .get = fpr_get, .set = fpr_set
+ },
+#ifdef CONFIG_ALTIVEC
+ [REGSET_VMX] = {
+ .core_note_type = NT_PPC_VMX, .n = 34,
+ .size = sizeof(vector128), .align = sizeof(vector128),
+ .active = vr_active, .get = vr_get, .set = vr_set
+ },
+#endif
+#ifdef CONFIG_SPE
+ [REGSET_SPE] = {
+ .n = 35,
+ .size = sizeof(u32), .align = sizeof(u32),
+ .active = evr_active, .get = evr_get, .set = evr_set
+ },
+#endif
+};
+
+static const struct user_regset_view user_ppc_native_view = {
+ .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
+ .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &user_ppc_native_view;
+}
+
+
+void user_enable_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
regs->msr |= MSR_SE;
#endif
}
+ set_tsk_thread_flag(task, TIF_SINGLESTEP);
}
-static inline void
-clear_single_step(struct task_struct *task)
+void user_disable_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
regs->msr &= ~MSR_SE;
#endif
}
+ clear_tsk_thread_flag(task, TIF_SINGLESTEP);
+}
+
+static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
+ unsigned long data)
+{
+ /* We only support one DABR and no IABRS at the moment */
+ if (addr > 0)
+ return -EINVAL;
+
+ /* The bottom 3 bits are flags */
+ if ((data & ~0x7UL) >= TASK_SIZE)
+ return -EIO;
+
+ /* Ensure translation is on */
+ if (data && !(data & DABR_TRANSLATION))
+ return -EIO;
+
+ task->thread.dabr = data;
+ return 0;
}
-#endif /* CONFIG_PPC32 */
/*
* Called by kernel/ptrace.c when detaching..
void ptrace_disable(struct task_struct *child)
{
/* make sure the single step bit is not set. */
- clear_single_step(child);
+ user_disable_single_step(child);
+}
+
+/*
+ * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
+ * we mark them as obsolete now, they will be removed in a future version
+ */
+static long arch_ptrace_old(struct task_struct *child, long request, long addr,
+ long data)
+{
+ int ret = -EPERM;
+
+ switch(request) {
+ case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
+ int i;
+ unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
+ unsigned long __user *tmp = (unsigned long __user *)addr;
+
+ CHECK_FULL_REGS(child->thread.regs);
+ for (i = 0; i < 32; i++) {
+ ret = put_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ break;
+ }
+
+ case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
+ int i;
+ unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
+ unsigned long __user *tmp = (unsigned long __user *)addr;
+
+ CHECK_FULL_REGS(child->thread.regs);
+ for (i = 0; i < 32; i++) {
+ ret = get_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ break;
+ }
+
+ case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
+ flush_fp_to_thread(child);
+ ret = get_fpregs((void __user *)addr, child, 0);
+ break;
+ }
+
+ case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
+ flush_fp_to_thread(child);
+ ret = set_fpregs((void __user *)addr, child, 0);
+ break;
+ }
+
+ }
+ return ret;
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKTEXT: /* read word at location addr. */
- case PTRACE_PEEKDATA: {
- unsigned long tmp;
- int copied;
-
- copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
- ret = -EIO;
- if (copied != sizeof(tmp))
- break;
- ret = put_user(tmp,(unsigned long __user *) data);
+ case PTRACE_PEEKDATA:
+ ret = generic_ptrace_peekdata(child, addr, data);
break;
- }
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
#endif
break;
-#ifdef CONFIG_PPC32
CHECK_FULL_REGS(child->thread.regs);
-#endif
if (index < PT_FPR0) {
- tmp = get_reg(child, (int) index);
+ tmp = ptrace_get_reg(child, (int) index);
} else {
flush_fp_to_thread(child);
tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
/* If I and D space are separate, this will have to be fixed. */
case PTRACE_POKETEXT: /* write the word at location addr. */
case PTRACE_POKEDATA:
- ret = 0;
- if (access_process_vm(child, addr, &data, sizeof(data), 1)
- == sizeof(data))
- break;
- ret = -EIO;
+ ret = generic_ptrace_pokedata(child, addr, data);
break;
/* write the word at location addr in the USER area */
#endif
break;
-#ifdef CONFIG_PPC32
CHECK_FULL_REGS(child->thread.regs);
-#endif
- if (index == PT_ORIG_R3)
- break;
if (index < PT_FPR0) {
- ret = put_reg(child, index, data);
+ ret = ptrace_put_reg(child, index, data);
} else {
flush_fp_to_thread(child);
((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
break;
}
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- ret = 0;
- break;
- }
-
-/*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL: {
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- set_single_step(child);
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
-#ifdef CONFIG_PPC64
case PTRACE_GET_DEBUGREG: {
ret = -EINVAL;
/* We only support one DABR and no IABRS at the moment */
case PTRACE_SET_DEBUGREG:
ret = ptrace_set_debugreg(child, addr, data);
break;
-#endif
-
- case PTRACE_DETACH:
- ret = ptrace_detach(child, data);
- break;
-
- case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
- unsigned long __user *tmp = (unsigned long __user *)addr;
- for (i = 0; i < 32; i++) {
- ret = put_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
+#ifdef CONFIG_PPC64
+ case PTRACE_GETREGS64:
+#endif
+ case PTRACE_GETREGS: { /* Get all pt_regs from the child. */
+ int ui;
+ if (!access_ok(VERIFY_WRITE, (void __user *)data,
+ sizeof(struct pt_regs))) {
+ ret = -EIO;
+ break;
+ }
+ CHECK_FULL_REGS(child->thread.regs);
+ ret = 0;
+ for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
+ ret |= __put_user(ptrace_get_reg(child, ui),
+ (unsigned long __user *) data);
+ data += sizeof(long);
}
break;
}
- case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
- unsigned long __user *tmp = (unsigned long __user *)addr;
-
- for (i = 0; i < 32; i++) {
- ret = get_user(*reg, tmp);
+#ifdef CONFIG_PPC64
+ case PTRACE_SETREGS64:
+#endif
+ case PTRACE_SETREGS: { /* Set all gp regs in the child. */
+ unsigned long tmp;
+ int ui;
+ if (!access_ok(VERIFY_READ, (void __user *)data,
+ sizeof(struct pt_regs))) {
+ ret = -EIO;
+ break;
+ }
+ CHECK_FULL_REGS(child->thread.regs);
+ ret = 0;
+ for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
+ ret = __get_user(tmp, (unsigned long __user *) data);
if (ret)
break;
- reg++;
- tmp++;
+ ptrace_put_reg(child, ui, tmp);
+ data += sizeof(long);
}
break;
}
- case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
- unsigned long __user *tmp = (unsigned long __user *)addr;
-
+ case PTRACE_GETFPREGS: { /* Get the child FPU state (FPR0...31 + FPSCR) */
flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = put_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
- }
+ ret = get_fpregs((void __user *)data, child, 1);
break;
}
- case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
- unsigned long __user *tmp = (unsigned long __user *)addr;
-
+ case PTRACE_SETFPREGS: { /* Set the child FPU state (FPR0...31 + FPSCR) */
flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = get_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
- }
+ ret = set_fpregs((void __user *)data, child, 1);
break;
}
#ifdef CONFIG_SPE
case PTRACE_GETEVRREGS:
/* Get the child spe register state. */
- if (child->thread.regs->msr & MSR_SPE)
- giveup_spe(child);
+ flush_spe_to_thread(child);
ret = get_evrregs((unsigned long __user *)data, child);
break;
/* Set the child spe register state. */
/* this is to clear the MSR_SPE bit to force a reload
* of register state from memory */
- if (child->thread.regs->msr & MSR_SPE)
- giveup_spe(child);
+ flush_spe_to_thread(child);
ret = set_evrregs(child, (unsigned long __user *)data);
break;
#endif
+ /* Old reverse args ptrace callss */
+ case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
+ case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
+ case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */
+ case PPC_PTRACE_SETFPREGS: /* Get FPRs 0 - 31. */
+ ret = arch_ptrace_old(child, request, addr, data);
+ break;
+
default:
ret = ptrace_request(child, request, addr, data);
break;
}
-
return ret;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff