step.c (577f99c1d08cf9cbdafd4e858dd13ff04d855090) step.c (4ba51fd75cc3789be83f0d6f878dabbb0cb19bca)
1/*
2 * x86 single-step support code, common to 32-bit and 64-bit.
3 */
4#include <linux/sched.h>
5#include <linux/mm.h>
6#include <linux/ptrace.h>
7
8unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs)

--- 126 unchanged lines hidden (view full) ---

135 return 1;
136}
137
138/*
139 * Install this value in MSR_IA32_DEBUGCTLMSR whenever child is running.
140 */
141static void write_debugctlmsr(struct task_struct *child, unsigned long val)
142{
1/*
2 * x86 single-step support code, common to 32-bit and 64-bit.
3 */
4#include <linux/sched.h>
5#include <linux/mm.h>
6#include <linux/ptrace.h>
7
8unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs)

--- 126 unchanged lines hidden (view full) ---

135 return 1;
136}
137
138/*
139 * Install this value in MSR_IA32_DEBUGCTLMSR whenever child is running.
140 */
141static void write_debugctlmsr(struct task_struct *child, unsigned long val)
142{
143 if (child->thread.debugctlmsr == val)
144 return;
145
143 child->thread.debugctlmsr = val;
144
145 if (child != current)
146 return;
147
148 wrmsrl(MSR_IA32_DEBUGCTLMSR, val);
149}
150

--- 9 unchanged lines hidden (view full) ---

160 * So noone should try to use debugger block stepping in a program
161 * that uses user-mode single stepping itself.
162 */
163 if (enable_single_step(child) && block) {
164 set_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
165 write_debugctlmsr(child,
166 child->thread.debugctlmsr | DEBUGCTLMSR_BTF);
167 } else {
146 child->thread.debugctlmsr = val;
147
148 if (child != current)
149 return;
150
151 wrmsrl(MSR_IA32_DEBUGCTLMSR, val);
152}
153

--- 9 unchanged lines hidden (view full) ---

163 * So noone should try to use debugger block stepping in a program
164 * that uses user-mode single stepping itself.
165 */
166 if (enable_single_step(child) && block) {
167 set_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
168 write_debugctlmsr(child,
169 child->thread.debugctlmsr | DEBUGCTLMSR_BTF);
170 } else {
168 write_debugctlmsr(child,
169 child->thread.debugctlmsr & ~DEBUGCTLMSR_BTF);
171 write_debugctlmsr(child,
172 child->thread.debugctlmsr & ~DEBUGCTLMSR_BTF);
170
173
171 if (!child->thread.debugctlmsr)
172 clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
174 if (!child->thread.debugctlmsr)
175 clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
173 }
174}
175
176void user_enable_single_step(struct task_struct *child)
177{
178 enable_step(child, 0);
179}
180

--- 23 unchanged lines hidden --- 		176 }
177}
178
179void user_enable_single_step(struct task_struct *child)
180{
181 enable_step(child, 0);
182}
183

--- 23 unchanged lines hidden ---