Release 4.14 arch/cris/arch-v10/kernel/ptrace.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2000-2003, Axis Communications AB.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/signal.h>
#include <linux/security.h>
#include <linux/uaccess.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
/*
* Determines which bits in DCCR the user has access to.
* 1 = access, 0 = no access.
*/
#define DCCR_MASK 0x0000001f
/* XNZVC */
/*
* Get contents of register REGNO in task TASK.
*/
inline long get_reg(struct task_struct *task, unsigned int regno)
{
/* USP is a special case, it's not in the pt_regs struct but
* in the tasks thread struct
*/
if (regno == PT_USP)
return task->thread.usp;
else if (regno < PT_MAX)
return ((unsigned long *)task_pt_regs(task))[regno];
else
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 55 | 98.21% | 2 | 66.67% |
| Al Viro | 1 | 1.79% | 1 | 33.33% |
| Total | 56 | 100.00% | 3 | 100.00% |
/*
* Write contents of register REGNO in task TASK.
*/
inline int put_reg(struct task_struct *task, unsigned int regno,
unsigned long data)
{
if (regno == PT_USP)
task->thread.usp = data;
else if (regno < PT_MAX)
((unsigned long *)task_pt_regs(task))[regno] = data;
else
return -1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 64 | 98.46% | 2 | 66.67% |
| Al Viro | 1 | 1.54% | 1 | 33.33% |
| Total | 65 | 100.00% | 3 | 100.00% |
/*
* Called by kernel/ptrace.c when detaching.
*
* Make sure the single step bit is not set.
*/
void
ptrace_disable(struct task_struct *child)
{
/* Todo - pending singlesteps? */
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 11 | 61.11% | 1 | 50.00% |
| Jesper Nilsson | 7 | 38.89% | 1 | 50.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
/*
* Note that this implementation of ptrace behaves differently from vanilla
* ptrace. Contrary to what the man page says, in the PTRACE_PEEKTEXT,
* PTRACE_PEEKDATA, and PTRACE_PEEKUSER requests the data variable is not
* ignored. Instead, the data variable is expected to point at a location
* (in user space) where the result of the ptrace call is written (instead of
* being returned).
*/
long arch_ptrace(struct task_struct *child, long request,
unsigned long addr, unsigned long data)
{
int ret;
unsigned int regno = addr >> 2;
unsigned long __user *datap = (unsigned long __user *)data;
switch (request) {
/* Read word at location address. */
case PTRACE_PEEKTEXT:
case PTRACE_PEEKDATA:
ret = generic_ptrace_peekdata(child, addr, data);
break;
/* Read the word at location address in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp;
ret = -EIO;
if ((addr & 3) || regno > PT_MAX)
break;
tmp = get_reg(child, regno);
ret = put_user(tmp, datap);
break;
}
/* Write the word at location address. */
case PTRACE_POKETEXT:
case PTRACE_POKEDATA:
ret = generic_ptrace_pokedata(child, addr, data);
break;
/* Write the word at location address in the USER area. */
case PTRACE_POKEUSR:
ret = -EIO;
if ((addr & 3) || regno > PT_MAX)
break;
if (regno == PT_DCCR) {
/* don't allow the tracing process to change stuff like
* interrupt enable, kernel/user bit, dma enables etc.
*/
data &= DCCR_MASK;
data |= get_reg(child, PT_DCCR) & ~DCCR_MASK;
}
if (put_reg(child, regno, data))
break;
ret = 0;
break;
/* Get all GP registers from the child. */
case PTRACE_GETREGS: {
int i;
unsigned long tmp;
ret = 0;
for (i = 0; i <= PT_MAX; i++) {
tmp = get_reg(child, i);
if (put_user(tmp, datap)) {
ret = -EFAULT;
break;
}
datap++;
}
break;
}
/* Set all GP registers in the child. */
case PTRACE_SETREGS: {
int i;
unsigned long tmp;
ret = 0;
for (i = 0; i <= PT_MAX; i++) {
if (get_user(tmp, datap)) {
ret = -EFAULT;
break;
}
if (i == PT_DCCR) {
tmp &= DCCR_MASK;
tmp |= get_reg(child, PT_DCCR) & ~DCCR_MASK;
}
put_reg(child, i, tmp);
datap++;
}
break;
}
default:
ret = ptrace_request(child, request, addr, data);
break;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 322 | 87.74% | 2 | 22.22% |
| Namhyung Kim | 19 | 5.18% | 2 | 22.22% |
| Al Viro | 10 | 2.72% | 1 | 11.11% |
| Christoph Hellwig | 7 | 1.91% | 1 | 11.11% |
| Andrew Morton | 5 | 1.36% | 1 | 11.11% |
| Alexey Dobriyan | 4 | 1.09% | 2 | 22.22% |
| Total | 367 | 100.00% | 9 | 100.00% |
void do_syscall_trace(void)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
/* 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.
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 71 | 95.95% | 1 | 50.00% |
| Andrew Morton | 3 | 4.05% | 1 | 50.00% |
| Total | 74 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mikael Starvik | 569 | 89.75% | 3 | 18.75% |
| Namhyung Kim | 19 | 3.00% | 2 | 12.50% |
| Al Viro | 12 | 1.89% | 2 | 12.50% |
| Andrew Morton | 8 | 1.26% | 1 | 6.25% |
| Christoph Hellwig | 7 | 1.10% | 1 | 6.25% |
| Jesper Nilsson | 7 | 1.10% | 1 | 6.25% |
| Alexey Dobriyan | 4 | 0.63% | 2 | 12.50% |
| Jesper Juhl | 3 | 0.47% | 1 | 6.25% |
| Ingo Molnar | 3 | 0.47% | 1 | 6.25% |
| Linus Torvalds | 1 | 0.16% | 1 | 6.25% |
| Greg Kroah-Hartman | 1 | 0.16% | 1 | 6.25% |
| Total | 634 | 100.00% | 16 | 100.00% |
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