2005-04-16 18:20:36 -04:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1992 Ross Biro
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* Copyright (C) Linus Torvalds
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* Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
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* Copyright (C) 1996 David S. Miller
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* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999 MIPS Technologies, Inc.
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* Copyright (C) 2000 Ulf Carlsson
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*
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* At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit
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* binaries.
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*/
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/user.h>
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#include <linux/security.h>
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#include <asm/cpu.h>
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2005-05-31 07:49:19 -04:00
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#include <asm/dsp.h>
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2005-04-16 18:20:36 -04:00
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#include <asm/fpu.h>
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#include <asm/mipsregs.h>
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2005-10-06 12:39:32 -04:00
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#include <asm/mipsmtregs.h>
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2005-04-16 18:20:36 -04:00
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/bootinfo.h>
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2005-09-28 18:11:15 -04:00
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int ptrace_getregs (struct task_struct *child, __s64 __user *data);
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int ptrace_setregs (struct task_struct *child, __s64 __user *data);
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int ptrace_getfpregs (struct task_struct *child, __u32 __user *data);
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int ptrace_setfpregs (struct task_struct *child, __u32 __user *data);
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2005-04-16 18:20:36 -04:00
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/*
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* Tracing a 32-bit process with a 64-bit strace and vice versa will not
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* work. I don't know how to fix this.
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*/
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asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
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{
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struct task_struct *child;
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int ret;
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#if 0
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printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
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(int) request, (int) pid, (unsigned long) addr,
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(unsigned long) data);
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#endif
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lock_kernel();
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if (request == PTRACE_TRACEME) {
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2006-01-08 04:02:33 -05:00
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ret = ptrace_traceme();
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2005-04-16 18:20:36 -04:00
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goto out;
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}
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2006-01-08 04:02:33 -05:00
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child = ptrace_get_task_struct(pid);
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if (IS_ERR(child)) {
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ret = PTR_ERR(child);
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goto out;
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}
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2005-04-16 18:20:36 -04:00
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if (request == PTRACE_ATTACH) {
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ret = ptrace_attach(child);
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goto out_tsk;
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}
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ret = ptrace_check_attach(child, request == PTRACE_KILL);
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if (ret < 0)
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goto out_tsk;
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switch (request) {
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/* when I and D space are separate, these will need to be fixed. */
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case PTRACE_PEEKTEXT: /* read word at location addr. */
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case PTRACE_PEEKDATA: {
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unsigned int tmp;
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int copied;
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copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
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ret = -EIO;
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if (copied != sizeof(tmp))
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break;
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2006-01-29 08:34:32 -05:00
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ret = put_user(tmp, (unsigned int __user *) (unsigned long) data);
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2005-04-16 18:20:36 -04:00
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break;
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}
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2005-09-28 18:11:15 -04:00
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/*
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* Read 4 bytes of the other process' storage
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* data is a pointer specifying where the user wants the
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* 4 bytes copied into
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* addr is a pointer in the user's storage that contains an 8 byte
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* address in the other process of the 4 bytes that is to be read
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* (this is run in a 32-bit process looking at a 64-bit process)
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* when I and D space are separate, these will need to be fixed.
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*/
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case PTRACE_PEEKTEXT_3264:
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case PTRACE_PEEKDATA_3264: {
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u32 tmp;
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int copied;
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u32 __user * addrOthers;
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ret = -EIO;
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/* Get the addr in the other process that we want to read */
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if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
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break;
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copied = access_process_vm(child, (u64)addrOthers, &tmp,
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sizeof(tmp), 0);
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if (copied != sizeof(tmp))
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break;
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ret = put_user(tmp, (u32 __user *) (unsigned long) data);
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break;
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}
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2005-04-16 18:20:36 -04:00
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/* Read the word at location addr in the USER area. */
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case PTRACE_PEEKUSR: {
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struct pt_regs *regs;
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unsigned int tmp;
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2006-01-12 04:06:07 -05:00
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regs = task_pt_regs(child);
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2005-04-16 18:20:36 -04:00
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ret = 0; /* Default return value. */
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switch (addr) {
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case 0 ... 31:
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tmp = regs->regs[addr];
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break;
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case FPR_BASE ... FPR_BASE + 31:
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if (tsk_used_math(child)) {
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fpureg_t *fregs = get_fpu_regs(child);
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/*
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* The odd registers are actually the high
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* order bits of the values stored in the even
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* registers - unless we're using r2k_switch.S.
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*/
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if (addr & 1)
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tmp = (unsigned long) (fregs[((addr & ~1) - 32)] >> 32);
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else
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tmp = (unsigned long) (fregs[(addr - 32)] & 0xffffffff);
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} else {
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tmp = -1; /* FP not yet used */
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}
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break;
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case PC:
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tmp = regs->cp0_epc;
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break;
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case CAUSE:
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tmp = regs->cp0_cause;
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break;
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case BADVADDR:
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tmp = regs->cp0_badvaddr;
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break;
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case MMHI:
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tmp = regs->hi;
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break;
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case MMLO:
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tmp = regs->lo;
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break;
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case FPC_CSR:
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2006-05-15 12:26:03 -04:00
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tmp = child->thread.fpu.fcr31;
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2005-04-16 18:20:36 -04:00
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break;
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case FPC_EIR: { /* implementation / version register */
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unsigned int flags;
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2006-04-05 04:45:45 -04:00
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#ifdef CONFIG_MIPS_MT_SMTC
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unsigned int irqflags;
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unsigned int mtflags;
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#endif /* CONFIG_MIPS_MT_SMTC */
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2005-04-16 18:20:36 -04:00
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2006-10-08 11:10:01 -04:00
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preempt_disable();
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2006-01-29 08:34:32 -05:00
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if (!cpu_has_fpu) {
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2006-10-08 11:10:01 -04:00
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preempt_enable();
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2006-01-29 08:34:32 -05:00
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tmp = 0;
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2005-04-16 18:20:36 -04:00
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break;
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2006-01-29 08:34:32 -05:00
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}
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2005-04-16 18:20:36 -04:00
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2006-04-05 04:45:45 -04:00
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#ifdef CONFIG_MIPS_MT_SMTC
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/* Read-modify-write of Status must be atomic */
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local_irq_save(irqflags);
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mtflags = dmt();
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#endif /* CONFIG_MIPS_MT_SMTC */
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2005-10-06 12:39:32 -04:00
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if (cpu_has_mipsmt) {
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unsigned int vpflags = dvpe();
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flags = read_c0_status();
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__enable_fpu();
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__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
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write_c0_status(flags);
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evpe(vpflags);
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} else {
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flags = read_c0_status();
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__enable_fpu();
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__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
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write_c0_status(flags);
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}
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2006-04-05 04:45:45 -04:00
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#ifdef CONFIG_MIPS_MT_SMTC
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emt(mtflags);
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local_irq_restore(irqflags);
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#endif /* CONFIG_MIPS_MT_SMTC */
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2005-10-06 12:39:32 -04:00
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preempt_enable();
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2005-04-16 18:20:36 -04:00
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break;
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}
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2006-01-29 08:34:32 -05:00
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case DSP_BASE ... DSP_BASE + 5: {
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dspreg_t *dregs;
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2005-05-31 07:49:19 -04:00
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if (!cpu_has_dsp) {
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tmp = 0;
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ret = -EIO;
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goto out_tsk;
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}
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2006-01-29 08:34:32 -05:00
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dregs = __get_dsp_regs(child);
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2005-12-05 08:47:25 -05:00
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tmp = (unsigned long) (dregs[addr - DSP_BASE]);
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2005-05-31 07:49:19 -04:00
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break;
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2006-01-29 08:34:32 -05:00
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}
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2005-05-31 07:49:19 -04:00
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case DSP_CONTROL:
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if (!cpu_has_dsp) {
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tmp = 0;
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ret = -EIO;
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goto out_tsk;
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}
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tmp = child->thread.dsp.dspcontrol;
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break;
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2005-04-16 18:20:36 -04:00
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default:
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tmp = 0;
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ret = -EIO;
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goto out_tsk;
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}
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2006-01-29 08:34:32 -05:00
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ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
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2005-04-16 18:20:36 -04:00
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break;
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}
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/* when I and D space are separate, this will have to be fixed. */
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case PTRACE_POKETEXT: /* write the word at location addr. */
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case PTRACE_POKEDATA:
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ret = 0;
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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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ret = -EIO;
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break;
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2005-09-28 18:11:15 -04:00
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/*
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* Write 4 bytes into the other process' storage
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* data is the 4 bytes that the user wants written
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* addr is a pointer in the user's storage that contains an
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* 8 byte address in the other process where the 4 bytes
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* that is to be written
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* (this is run in a 32-bit process looking at a 64-bit process)
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* when I and D space are separate, these will need to be fixed.
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*/
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case PTRACE_POKETEXT_3264:
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case PTRACE_POKEDATA_3264: {
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u32 __user * addrOthers;
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/* Get the addr in the other process that we want to write into */
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ret = -EIO;
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if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)
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break;
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ret = 0;
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if (access_process_vm(child, (u64)addrOthers, &data,
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sizeof(data), 1) == sizeof(data))
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break;
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ret = -EIO;
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break;
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}
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2005-04-16 18:20:36 -04:00
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case PTRACE_POKEUSR: {
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struct pt_regs *regs;
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ret = 0;
|
2006-01-12 04:06:07 -05:00
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regs = task_pt_regs(child);
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2005-04-16 18:20:36 -04:00
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switch (addr) {
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case 0 ... 31:
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regs->regs[addr] = data;
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break;
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case FPR_BASE ... FPR_BASE + 31: {
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fpureg_t *fregs = get_fpu_regs(child);
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if (!tsk_used_math(child)) {
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/* FP not yet used */
|
2006-05-15 12:26:03 -04:00
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memset(&child->thread.fpu, ~0,
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sizeof(child->thread.fpu));
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child->thread.fpu.fcr31 = 0;
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2005-04-16 18:20:36 -04:00
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}
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|
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/*
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* The odd registers are actually the high order bits
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|
* of the values stored in the even registers - unless
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* we're using r2k_switch.S.
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*/
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if (addr & 1) {
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fregs[(addr & ~1) - FPR_BASE] &= 0xffffffff;
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fregs[(addr & ~1) - FPR_BASE] |= ((unsigned long long) data) << 32;
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} else {
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fregs[addr - FPR_BASE] &= ~0xffffffffLL;
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/* Must cast, lest sign extension fill upper
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bits! */
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fregs[addr - FPR_BASE] |= (unsigned int)data;
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}
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break;
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}
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case PC:
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regs->cp0_epc = data;
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break;
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case MMHI:
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regs->hi = data;
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break;
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case MMLO:
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regs->lo = data;
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break;
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case FPC_CSR:
|
2006-05-15 12:26:03 -04:00
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child->thread.fpu.fcr31 = data;
|
2005-04-16 18:20:36 -04:00
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break;
|
2006-01-29 08:34:32 -05:00
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case DSP_BASE ... DSP_BASE + 5: {
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dspreg_t *dregs;
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|
2005-05-31 07:49:19 -04:00
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if (!cpu_has_dsp) {
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ret = -EIO;
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break;
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}
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|
2006-01-29 08:34:32 -05:00
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dregs = __get_dsp_regs(child);
|
2005-05-31 07:49:19 -04:00
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dregs[addr - DSP_BASE] = data;
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break;
|
2006-01-29 08:34:32 -05:00
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}
|
2005-05-31 07:49:19 -04:00
|
|
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case DSP_CONTROL:
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if (!cpu_has_dsp) {
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ret = -EIO;
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break;
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}
|
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|
|
child->thread.dsp.dspcontrol = data;
|
|
|
|
break;
|
2005-04-16 18:20:36 -04:00
|
|
|
default:
|
|
|
|
/* The rest are not allowed. */
|
|
|
|
ret = -EIO;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-09-28 18:11:15 -04:00
|
|
|
case PTRACE_GETREGS:
|
|
|
|
ret = ptrace_getregs (child, (__u64 __user *) (__u64) data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PTRACE_SETREGS:
|
|
|
|
ret = ptrace_setregs (child, (__u64 __user *) (__u64) data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PTRACE_GETFPREGS:
|
|
|
|
ret = ptrace_getfpregs (child, (__u32 __user *) (__u64) data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PTRACE_SETFPREGS:
|
|
|
|
ret = ptrace_setfpregs (child, (__u32 __user *) (__u64) data);
|
|
|
|
break;
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
|
|
|
|
case PTRACE_CONT: { /* restart after signal. */
|
|
|
|
ret = -EIO;
|
2005-05-01 11:59:14 -04:00
|
|
|
if (!valid_signal(data))
|
2005-04-16 18:20:36 -04:00
|
|
|
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;
|
|
|
|
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;
|
|
|
|
wake_up_process(child);
|
|
|
|
break;
|
|
|
|
|
2005-04-13 13:43:59 -04:00
|
|
|
case PTRACE_GET_THREAD_AREA:
|
2006-01-12 04:06:07 -05:00
|
|
|
ret = put_user(task_thread_info(child)->tp_value,
|
2005-04-13 13:43:59 -04:00
|
|
|
(unsigned int __user *) (unsigned long) data);
|
|
|
|
break;
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
case PTRACE_DETACH: /* detach a process that was attached. */
|
|
|
|
ret = ptrace_detach(child, data);
|
|
|
|
break;
|
|
|
|
|
2005-02-16 16:22:40 -05:00
|
|
|
case PTRACE_GETEVENTMSG:
|
|
|
|
ret = put_user(child->ptrace_message,
|
|
|
|
(unsigned int __user *) (unsigned long) data);
|
|
|
|
break;
|
|
|
|
|
2005-09-28 18:11:15 -04:00
|
|
|
case PTRACE_GET_THREAD_AREA_3264:
|
2006-01-12 04:06:07 -05:00
|
|
|
ret = put_user(task_thread_info(child)->tp_value,
|
2005-09-28 18:11:15 -04:00
|
|
|
(unsigned long __user *) (unsigned long) data);
|
|
|
|
break;
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
default:
|
|
|
|
ret = ptrace_request(child, request, addr, data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
out_tsk:
|
|
|
|
put_task_struct(child);
|
|
|
|
out:
|
|
|
|
unlock_kernel();
|
|
|
|
return ret;
|
|
|
|
}
|