mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-03 15:47:36 +00:00
powerpc: merge ptrace.c
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
parent
eec5ef9098
commit
e8a30302ab
5 changed files with 141 additions and 398 deletions
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@ -10,7 +10,7 @@ CFLAGS_prom_init.o += -fPIC
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CFLAGS_btext.o += -fPIC
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CFLAGS_btext.o += -fPIC
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endif
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endif
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obj-y := semaphore.o cputable.o
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obj-y := semaphore.o cputable.o ptrace.o
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obj-$(CONFIG_PPC64) += binfmt_elf32.o
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obj-$(CONFIG_PPC64) += binfmt_elf32.o
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obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
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obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o
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obj-$(CONFIG_POWER4) += idle_power4.o
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obj-$(CONFIG_POWER4) += idle_power4.o
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@ -1,6 +1,4 @@
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/*
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/*
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* arch/ppc/kernel/ptrace.c
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*
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* PowerPC version
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* PowerPC version
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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*
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@ -17,6 +15,7 @@
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* this archive for more details.
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* this archive for more details.
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*/
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/mm.h>
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@ -29,13 +28,19 @@
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#include <linux/signal.h>
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#include <linux/signal.h>
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#include <linux/seccomp.h>
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#include <linux/seccomp.h>
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#include <linux/audit.h>
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#include <linux/audit.h>
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#ifdef CONFIG_PPC32
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#include <linux/module.h>
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#include <linux/module.h>
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#endif
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/pgtable.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#ifdef CONFIG_PPC64
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#include <asm/ptrace-common.h>
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#endif
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#ifdef CONFIG_PPC32
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/*
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/*
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* Set of msr bits that gdb can change on behalf of a process.
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* Set of msr bits that gdb can change on behalf of a process.
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*/
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*/
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@ -44,12 +49,14 @@
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#else
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#else
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#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
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#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
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#endif
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#endif
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#endif /* CONFIG_PPC32 */
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/*
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/*
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* does not yet catch signals sent when the child dies.
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* does not yet catch signals sent when the child dies.
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* in exit.c or in signal.c.
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* in exit.c or in signal.c.
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*/
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*/
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#ifdef CONFIG_PPC32
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/*
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/*
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* Get contents of register REGNO in task TASK.
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* Get contents of register REGNO in task TASK.
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*/
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*/
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@ -228,6 +235,7 @@ clear_single_step(struct task_struct *task)
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#endif
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#endif
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}
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}
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}
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}
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#endif /* CONFIG_PPC32 */
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/*
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/*
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* Called by kernel/ptrace.c when detaching..
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* Called by kernel/ptrace.c when detaching..
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@ -296,25 +304,28 @@ int sys_ptrace(long request, long pid, long addr, long data)
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}
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}
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/* read the word at location addr in the USER area. */
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/* read the word at location addr in the USER area. */
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/* XXX this will need fixing for 64-bit */
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case PTRACE_PEEKUSR: {
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case PTRACE_PEEKUSR: {
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unsigned long index, tmp;
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unsigned long index, tmp;
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ret = -EIO;
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ret = -EIO;
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/* convert to index and check */
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/* convert to index and check */
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#ifdef CONFIG_PPC32
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index = (unsigned long) addr >> 2;
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index = (unsigned long) addr >> 2;
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if ((addr & 3) || index > PT_FPSCR
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if ((addr & 3) || (index > PT_FPSCR)
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|| child->thread.regs == NULL)
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|| (child->thread.regs == NULL))
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#else
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index = (unsigned long) addr >> 3;
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if ((addr & 7) || (index > PT_FPSCR))
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#endif
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break;
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break;
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#ifdef CONFIG_PPC32
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CHECK_FULL_REGS(child->thread.regs);
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CHECK_FULL_REGS(child->thread.regs);
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#endif
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if (index < PT_FPR0) {
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if (index < PT_FPR0) {
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tmp = get_reg(child, (int) index);
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tmp = get_reg(child, (int) index);
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} else {
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} else {
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preempt_disable();
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flush_fp_to_thread(child);
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if (child->thread.regs->msr & MSR_FP)
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giveup_fpu(child);
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preempt_enable();
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tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
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tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
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}
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}
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ret = put_user(tmp,(unsigned long __user *) data);
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ret = put_user(tmp,(unsigned long __user *) data);
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@ -325,7 +336,8 @@ int sys_ptrace(long request, long pid, long addr, long data)
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case PTRACE_POKETEXT: /* write the word at location addr. */
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case PTRACE_POKETEXT: /* write the word at location addr. */
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case PTRACE_POKEDATA:
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case PTRACE_POKEDATA:
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ret = 0;
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ret = 0;
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if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))
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if (access_process_vm(child, addr, &data, sizeof(data), 1)
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== sizeof(data))
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break;
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break;
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ret = -EIO;
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ret = -EIO;
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break;
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break;
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@ -336,21 +348,25 @@ int sys_ptrace(long request, long pid, long addr, long data)
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ret = -EIO;
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ret = -EIO;
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/* convert to index and check */
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/* convert to index and check */
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#ifdef CONFIG_PPC32
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index = (unsigned long) addr >> 2;
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index = (unsigned long) addr >> 2;
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if ((addr & 3) || index > PT_FPSCR
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if ((addr & 3) || (index > PT_FPSCR)
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|| child->thread.regs == NULL)
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|| (child->thread.regs == NULL))
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#else
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index = (unsigned long) addr >> 3;
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if ((addr & 7) || (index > PT_FPSCR))
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#endif
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break;
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break;
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#ifdef CONFIG_PPC32
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CHECK_FULL_REGS(child->thread.regs);
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CHECK_FULL_REGS(child->thread.regs);
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#endif
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if (index == PT_ORIG_R3)
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if (index == PT_ORIG_R3)
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break;
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break;
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if (index < PT_FPR0) {
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if (index < PT_FPR0) {
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ret = put_reg(child, index, data);
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ret = put_reg(child, index, data);
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} else {
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} else {
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preempt_disable();
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flush_fp_to_thread(child);
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if (child->thread.regs->msr & MSR_FP)
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giveup_fpu(child);
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preempt_enable();
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((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
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((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
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ret = 0;
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ret = 0;
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}
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}
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@ -362,11 +378,10 @@ int sys_ptrace(long request, long pid, long addr, long data)
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ret = -EIO;
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ret = -EIO;
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if (!valid_signal(data))
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if (!valid_signal(data))
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break;
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break;
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if (request == PTRACE_SYSCALL) {
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if (request == PTRACE_SYSCALL)
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set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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} else {
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else
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clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
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}
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child->exit_code = data;
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child->exit_code = data;
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/* make sure the single step bit is not set. */
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/* make sure the single step bit is not set. */
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clear_single_step(child);
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clear_single_step(child);
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@ -404,28 +419,102 @@ int sys_ptrace(long request, long pid, long addr, long data)
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break;
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break;
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}
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}
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#ifdef CONFIG_PPC64
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case PTRACE_GET_DEBUGREG: {
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ret = -EINVAL;
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/* We only support one DABR and no IABRS at the moment */
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if (addr > 0)
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break;
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ret = put_user(child->thread.dabr,
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(unsigned long __user *)data);
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break;
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}
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case PTRACE_SET_DEBUGREG:
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ret = ptrace_set_debugreg(child, addr, data);
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break;
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#endif
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case PTRACE_DETACH:
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case PTRACE_DETACH:
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ret = ptrace_detach(child, data);
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ret = ptrace_detach(child, data);
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break;
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break;
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#ifdef CONFIG_PPC64
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case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
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int i;
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unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
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unsigned long __user *tmp = (unsigned long __user *)addr;
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for (i = 0; i < 32; i++) {
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ret = put_user(*reg, tmp);
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if (ret)
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break;
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reg++;
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tmp++;
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}
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break;
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}
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case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
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int i;
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unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
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unsigned long __user *tmp = (unsigned long __user *)addr;
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for (i = 0; i < 32; i++) {
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ret = get_user(*reg, tmp);
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if (ret)
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break;
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reg++;
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tmp++;
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}
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break;
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}
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case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
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int i;
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unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
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unsigned long __user *tmp = (unsigned long __user *)addr;
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flush_fp_to_thread(child);
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for (i = 0; i < 32; i++) {
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ret = put_user(*reg, tmp);
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if (ret)
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break;
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reg++;
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tmp++;
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}
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break;
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}
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case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
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int i;
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unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
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unsigned long __user *tmp = (unsigned long __user *)addr;
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flush_fp_to_thread(child);
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for (i = 0; i < 32; i++) {
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ret = get_user(*reg, tmp);
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if (ret)
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break;
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reg++;
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tmp++;
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}
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break;
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}
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#endif /* CONFIG_PPC64 */
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#ifdef CONFIG_ALTIVEC
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#ifdef CONFIG_ALTIVEC
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case PTRACE_GETVRREGS:
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case PTRACE_GETVRREGS:
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/* Get the child altivec register state. */
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/* Get the child altivec register state. */
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preempt_disable();
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flush_altivec_to_thread(child);
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if (child->thread.regs->msr & MSR_VEC)
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giveup_altivec(child);
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preempt_enable();
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ret = get_vrregs((unsigned long __user *)data, child);
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ret = get_vrregs((unsigned long __user *)data, child);
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break;
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break;
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case PTRACE_SETVRREGS:
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case PTRACE_SETVRREGS:
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/* Set the child altivec register state. */
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/* Set the child altivec register state. */
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/* this is to clear the MSR_VEC bit to force a reload
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flush_altivec_to_thread(child);
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* of register state from memory */
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preempt_disable();
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if (child->thread.regs->msr & MSR_VEC)
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giveup_altivec(child);
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preempt_enable();
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ret = set_vrregs(child, (unsigned long __user *)data);
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ret = set_vrregs(child, (unsigned long __user *)data);
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break;
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break;
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#endif
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#endif
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@ -478,12 +567,21 @@ static void do_syscall_trace(void)
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void do_syscall_trace_enter(struct pt_regs *regs)
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void do_syscall_trace_enter(struct pt_regs *regs)
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{
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{
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#ifdef CONFIG_PPC64
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secure_computing(regs->gpr[0]);
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#endif
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if (test_thread_flag(TIF_SYSCALL_TRACE)
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if (test_thread_flag(TIF_SYSCALL_TRACE)
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&& (current->ptrace & PT_PTRACED))
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&& (current->ptrace & PT_PTRACED))
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do_syscall_trace();
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do_syscall_trace();
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if (unlikely(current->audit_context))
|
if (unlikely(current->audit_context))
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audit_syscall_entry(current, AUDIT_ARCH_PPC,
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audit_syscall_entry(current,
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#ifdef CONFIG_PPC32
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AUDIT_ARCH_PPC,
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#else
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test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
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|
#endif
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regs->gpr[0],
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regs->gpr[0],
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regs->gpr[3], regs->gpr[4],
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regs->gpr[3], regs->gpr[4],
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regs->gpr[5], regs->gpr[6]);
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regs->gpr[5], regs->gpr[6]);
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@ -491,17 +589,25 @@ void do_syscall_trace_enter(struct pt_regs *regs)
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|
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void do_syscall_trace_leave(struct pt_regs *regs)
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void do_syscall_trace_leave(struct pt_regs *regs)
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{
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{
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#ifdef CONFIG_PPC32
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secure_computing(regs->gpr[0]);
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secure_computing(regs->gpr[0]);
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#endif
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|
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if (unlikely(current->audit_context))
|
if (unlikely(current->audit_context))
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audit_syscall_exit(current,
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audit_syscall_exit(current,
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(regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
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(regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
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regs->result);
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regs->result);
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|
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if ((test_thread_flag(TIF_SYSCALL_TRACE))
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if ((test_thread_flag(TIF_SYSCALL_TRACE)
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|
#ifdef CONFIG_PPC64
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|| test_thread_flag(TIF_SINGLESTEP)
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#endif
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|
)
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&& (current->ptrace & PT_PTRACED))
|
&& (current->ptrace & PT_PTRACED))
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do_syscall_trace();
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do_syscall_trace();
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}
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}
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#ifdef CONFIG_PPC32
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EXPORT_SYMBOL(do_syscall_trace_enter);
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EXPORT_SYMBOL(do_syscall_trace_enter);
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EXPORT_SYMBOL(do_syscall_trace_leave);
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EXPORT_SYMBOL(do_syscall_trace_leave);
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#endif
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|
@ -13,7 +13,7 @@ extra-$(CONFIG_POWER4) += idle_power4.o
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extra-y += vmlinux.lds
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extra-y += vmlinux.lds
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|
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obj-y := entry.o traps.o irq.o idle.o time.o misc.o \
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obj-y := entry.o traps.o irq.o idle.o time.o misc.o \
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process.o signal.o ptrace.o align.o \
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process.o signal.o align.o \
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syscalls.o setup.o \
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syscalls.o setup.o \
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ppc_htab.o perfmon.o
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ppc_htab.o perfmon.o
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obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
|
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
|
||||||
|
@ -38,7 +38,7 @@ endif
|
||||||
|
|
||||||
else
|
else
|
||||||
obj-y := irq.o idle.o time.o \
|
obj-y := irq.o idle.o time.o \
|
||||||
signal.o ptrace.o align.o \
|
signal.o align.o \
|
||||||
syscalls.o perfmon.o
|
syscalls.o perfmon.o
|
||||||
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
|
obj-$(CONFIG_6xx) += l2cr.o cpu_setup_6xx.o
|
||||||
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
|
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
|
||||||
|
|
|
@ -12,7 +12,7 @@ obj-y := setup.o entry.o misc.o prom.o
|
||||||
endif
|
endif
|
||||||
|
|
||||||
obj-y += irq.o idle.o dma.o \
|
obj-y += irq.o idle.o dma.o \
|
||||||
time.o signal.o syscalls.o ptrace.o \
|
time.o signal.o syscalls.o \
|
||||||
align.o bitops.o pacaData.o \
|
align.o bitops.o pacaData.o \
|
||||||
udbg.o sys_ppc32.o ioctl32.o \
|
udbg.o sys_ppc32.o ioctl32.o \
|
||||||
ptrace32.o signal32.o rtc.o \
|
ptrace32.o signal32.o rtc.o \
|
||||||
|
|
|
@ -1,363 +0,0 @@
|
||||||
/*
|
|
||||||
* 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();
|
|
||||||
}
|
|
Loading…
Reference in a new issue