/*
- * arch/ppc/kernel/ptrace.c
- *
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* this archive for more details.
*/
+#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/seccomp.h>
#include <linux/audit.h>
+#ifdef CONFIG_PPC32
#include <linux/module.h>
+#endif
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
+#ifdef CONFIG_PPC64
+#include <asm/ptrace-common.h>
+#endif
+#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.
*/
+#ifdef CONFIG_PPC32
/*
* Get contents of register REGNO in task TASK.
*/
#endif
}
}
+#endif /* CONFIG_PPC32 */
/*
* Called by kernel/ptrace.c when detaching..
}
/* read the word at location addr in the USER area. */
- /* XXX this will need fixing for 64-bit */
case PTRACE_PEEKUSR: {
unsigned long index, tmp;
ret = -EIO;
/* convert to index and check */
+#ifdef CONFIG_PPC32
index = (unsigned long) addr >> 2;
- if ((addr & 3) || index > PT_FPSCR
- || child->thread.regs == NULL)
+ if ((addr & 3) || (index > PT_FPSCR)
+ || (child->thread.regs == NULL))
+#else
+ index = (unsigned long) addr >> 3;
+ if ((addr & 7) || (index > PT_FPSCR))
+#endif
break;
+#ifdef CONFIG_PPC32
CHECK_FULL_REGS(child->thread.regs);
+#endif
if (index < PT_FPR0) {
tmp = get_reg(child, (int) index);
} else {
- preempt_disable();
- if (child->thread.regs->msr & MSR_FP)
- giveup_fpu(child);
- preempt_enable();
+ flush_fp_to_thread(child);
tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
}
ret = put_user(tmp,(unsigned long __user *) data);
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))
+ if (access_process_vm(child, addr, &data, sizeof(data), 1)
+ == sizeof(data))
break;
ret = -EIO;
break;
ret = -EIO;
/* convert to index and check */
+#ifdef CONFIG_PPC32
index = (unsigned long) addr >> 2;
- if ((addr & 3) || index > PT_FPSCR
- || child->thread.regs == NULL)
+ if ((addr & 3) || (index > PT_FPSCR)
+ || (child->thread.regs == NULL))
+#else
+ index = (unsigned long) addr >> 3;
+ if ((addr & 7) || (index > PT_FPSCR))
+#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);
} else {
- preempt_disable();
- if (child->thread.regs->msr & MSR_FP)
- giveup_fpu(child);
- preempt_enable();
+ flush_fp_to_thread(child);
((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
ret = 0;
}
ret = -EIO;
if (!valid_signal(data))
break;
- if (request == PTRACE_SYSCALL) {
+ if (request == PTRACE_SYSCALL)
set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- } else {
+ 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);
break;
}
+#ifdef CONFIG_PPC64
+ case PTRACE_GET_DEBUGREG: {
+ ret = -EINVAL;
+ /* We only support one DABR and no IABRS at the moment */
+ if (addr > 0)
+ break;
+ ret = put_user(child->thread.dabr,
+ (unsigned long __user *)data);
+ break;
+ }
+
+ case PTRACE_SET_DEBUGREG:
+ ret = ptrace_set_debugreg(child, addr, data);
+ break;
+#endif
+
case PTRACE_DETACH:
ret = ptrace_detach(child, data);
break;
+#ifdef CONFIG_PPC64
+ 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++;
+ }
+ 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);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ 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;
+
+ flush_fp_to_thread(child);
+
+ for (i = 0; i < 32; i++) {
+ ret = put_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ 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;
+
+ flush_fp_to_thread(child);
+
+ for (i = 0; i < 32; i++) {
+ ret = get_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ break;
+ }
+#endif /* CONFIG_PPC64 */
+
#ifdef CONFIG_ALTIVEC
case PTRACE_GETVRREGS:
/* Get the child altivec register state. */
- preempt_disable();
- if (child->thread.regs->msr & MSR_VEC)
- giveup_altivec(child);
- preempt_enable();
+ flush_altivec_to_thread(child);
ret = get_vrregs((unsigned long __user *)data, child);
break;
case PTRACE_SETVRREGS:
/* Set the child altivec register state. */
- /* this is to clear the MSR_VEC bit to force a reload
- * of register state from memory */
- preempt_disable();
- if (child->thread.regs->msr & MSR_VEC)
- giveup_altivec(child);
- preempt_enable();
+ flush_altivec_to_thread(child);
ret = set_vrregs(child, (unsigned long __user *)data);
break;
#endif
void do_syscall_trace_enter(struct pt_regs *regs)
{
+#ifdef CONFIG_PPC64
+ secure_computing(regs->gpr[0]);
+#endif
+
if (test_thread_flag(TIF_SYSCALL_TRACE)
&& (current->ptrace & PT_PTRACED))
do_syscall_trace();
if (unlikely(current->audit_context))
- audit_syscall_entry(current, AUDIT_ARCH_PPC,
+ audit_syscall_entry(current,
+#ifdef CONFIG_PPC32
+ AUDIT_ARCH_PPC,
+#else
+ test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
+#endif
regs->gpr[0],
regs->gpr[3], regs->gpr[4],
regs->gpr[5], regs->gpr[6]);
void do_syscall_trace_leave(struct pt_regs *regs)
{
+#ifdef CONFIG_PPC32
secure_computing(regs->gpr[0]);
+#endif
if (unlikely(current->audit_context))
audit_syscall_exit(current,
(regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
regs->result);
- if ((test_thread_flag(TIF_SYSCALL_TRACE))
+ if ((test_thread_flag(TIF_SYSCALL_TRACE)
+#ifdef CONFIG_PPC64
+ || test_thread_flag(TIF_SINGLESTEP)
+#endif
+ )
&& (current->ptrace & PT_PTRACED))
do_syscall_trace();
}
+#ifdef CONFIG_PPC32
EXPORT_SYMBOL(do_syscall_trace_enter);
EXPORT_SYMBOL(do_syscall_trace_leave);
+#endif
+++ /dev/null
-/*
- * linux/arch/ppc64/kernel/ptrace.c
- *
- * PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Derived from "arch/m68k/kernel/ptrace.c"
- * Copyright (C) 1994 by Hamish Macdonald
- * Taken from linux/kernel/ptrace.c and modified for M680x0.
- * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * Modified by Cort Dougan (cort@hq.fsmlabs.com)
- * and Paul Mackerras (paulus@linuxcare.com.au).
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License. See the file README.legal in the main directory of
- * this archive for more details.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/audit.h>
-#include <linux/seccomp.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/ptrace-common.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure single step bits etc are not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
- /* make sure the single step bit is not set. */
- clear_single_step(child);
-}
-
-int sys_ptrace(long request, long pid, long addr, long data)
-{
- struct task_struct *child;
- int ret = -EPERM;
-
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- /* are we already being traced? */
- if (current->ptrace & PT_PTRACED)
- goto out;
- ret = security_ptrace(current->parent, current);
- if (ret)
- goto out;
- /* set the ptrace bit in the process flags. */
- current->ptrace |= PT_PTRACED;
- ret = 0;
- goto out;
- }
- ret = -ESRCH;
- read_lock(&tasklist_lock);
- child = find_task_by_pid(pid);
- if (child)
- get_task_struct(child);
- read_unlock(&tasklist_lock);
- if (!child)
- goto out;
-
- ret = -EPERM;
- if (pid == 1) /* you may not mess with init */
- goto out_tsk;
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- goto out_tsk;
-
- 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);
- break;
- }
-
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR: {
- unsigned long index;
- unsigned long tmp;
-
- ret = -EIO;
- /* convert to index and check */
- index = (unsigned long) addr >> 3;
- if ((addr & 7) || (index > PT_FPSCR))
- break;
-
- if (index < PT_FPR0) {
- tmp = get_reg(child, (int)index);
- } else {
- flush_fp_to_thread(child);
- tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
- }
- ret = put_user(tmp,(unsigned long __user *) data);
- break;
- }
-
- /* 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;
- break;
-
- /* write the word at location addr in the USER area */
- case PTRACE_POKEUSR: {
- unsigned long index;
-
- ret = -EIO;
- /* convert to index and check */
- index = (unsigned long) addr >> 3;
- if ((addr & 7) || (index > PT_FPSCR))
- break;
-
- if (index == PT_ORIG_R3)
- break;
- if (index < PT_FPR0) {
- ret = put_reg(child, index, data);
- } else {
- flush_fp_to_thread(child);
- ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
- ret = 0;
- }
- 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;
- }
-
- case PTRACE_GET_DEBUGREG: {
- ret = -EINVAL;
- /* We only support one DABR and no IABRS at the moment */
- if (addr > 0)
- break;
- ret = put_user(child->thread.dabr,
- (unsigned long __user *)data);
- break;
- }
-
- case PTRACE_SET_DEBUGREG:
- ret = ptrace_set_debugreg(child, addr, data);
- break;
-
- 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++;
- }
- 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);
- if (ret)
- break;
- reg++;
- tmp++;
- }
- 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;
-
- flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = put_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
- }
- 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;
-
- flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = get_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
- }
- break;
- }
-
-#ifdef CONFIG_ALTIVEC
- case PTRACE_GETVRREGS:
- /* Get the child altivec register state. */
- flush_altivec_to_thread(child);
- ret = get_vrregs((unsigned long __user *)data, child);
- break;
-
- case PTRACE_SETVRREGS:
- /* Set the child altivec register state. */
- flush_altivec_to_thread(child);
- ret = set_vrregs(child, (unsigned long __user *)data);
- break;
-#endif
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-out_tsk:
- put_task_struct(child);
-out:
- unlock_kernel();
- return ret;
-}
-
-static void do_syscall_trace(void)
-{
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
-
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
-}
-
-void do_syscall_trace_enter(struct pt_regs *regs)
-{
- secure_computing(regs->gpr[0]);
-
- if (test_thread_flag(TIF_SYSCALL_TRACE)
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
-
- if (unlikely(current->audit_context))
- audit_syscall_entry(current,
- test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
- regs->gpr[0],
- regs->gpr[3], regs->gpr[4],
- regs->gpr[5], regs->gpr[6]);
-
-}
-
-void do_syscall_trace_leave(struct pt_regs *regs)
-{
- if (unlikely(current->audit_context))
- audit_syscall_exit(current,
- (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
- regs->result);
-
- if ((test_thread_flag(TIF_SYSCALL_TRACE)
- || test_thread_flag(TIF_SINGLESTEP))
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
-}
projects / kernel / kernel-generic.git / commitdiff