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-rw-r--r--arch/sh/include/asm/ptrace.h9
-rw-r--r--arch/sh/kernel/ptrace_32.c93
-rw-r--r--arch/sh/kernel/ptrace_64.c77
3 files changed, 39 insertions, 140 deletions
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h
index 643ab5a7cf3..b86aeabba61 100644
--- a/arch/sh/include/asm/ptrace.h
+++ b/arch/sh/include/asm/ptrace.h
@@ -104,6 +104,15 @@ struct pt_dspregs {
extern void show_regs(struct pt_regs *);
+/*
+ * These are defined as per linux/ptrace.h.
+ */
+struct task_struct;
+
+#define arch_has_single_step() (1)
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
#ifdef CONFIG_SH_DSP
#define task_pt_regs(task) \
((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index e9bd4b2aa9c..ff66f97c564 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -58,7 +58,23 @@ static inline int put_stack_long(struct task_struct *task, int offset,
return 0;
}
-static void ptrace_disable_singlestep(struct task_struct *child)
+void user_enable_single_step(struct task_struct *child)
+{
+ struct pt_regs *regs = task_pt_regs(child);
+ long pc;
+
+ pc = get_stack_long(child, (long)&regs->pc);
+
+ /* Next scheduling will set up UBC */
+ if (child->thread.ubc_pc == 0)
+ ubc_usercnt += 1;
+
+ child->thread.ubc_pc = pc;
+
+ set_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
{
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
@@ -82,7 +98,7 @@ static void ptrace_disable_singlestep(struct task_struct *child)
*/
void ptrace_disable(struct task_struct *child)
{
- ptrace_disable_singlestep(child);
+ user_disable_single_step(child);
}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
@@ -91,12 +107,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
int ret;
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:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp;
@@ -126,12 +136,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
}
- /* when 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 = generic_ptrace_pokedata(child, addr, data);
- break;
-
case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
ret = -EIO;
if ((addr & 3) || addr < 0 ||
@@ -152,67 +156,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
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);
-
- ptrace_disable_singlestep(child);
-
- 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;
- ptrace_disable_singlestep(child);
- child->exit_code = SIGKILL;
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- long pc;
- struct pt_regs *regs = NULL;
-
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- if ((child->ptrace & PT_DTRACE) == 0) {
- /* Spurious delayed TF traps may occur */
- child->ptrace |= PT_DTRACE;
- }
-
- pc = get_stack_long(child, (long)&regs->pc);
-
- /* Next scheduling will set up UBC */
- if (child->thread.ubc_pc == 0)
- ubc_usercnt += 1;
- child->thread.ubc_pc = pc;
-
- set_tsk_thread_flag(child, TIF_SINGLESTEP);
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
#ifdef CONFIG_SH_DSP
case PTRACE_GETDSPREGS: {
unsigned long dp;
diff --git a/arch/sh/kernel/ptrace_64.c b/arch/sh/kernel/ptrace_64.c
index 7d877626095..108f3962e39 100644
--- a/arch/sh/kernel/ptrace_64.c
+++ b/arch/sh/kernel/ptrace_64.c
@@ -121,18 +121,23 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
return 0;
}
+void user_enable_single_step(struct task_struct *child)
+{
+ struct pt_regs *regs = child->thread.uregs;
+
+ regs->sr |= SR_SSTEP; /* auto-resetting upon exception */
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ regs->sr &= ~SR_SSTEP;
+}
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
int ret;
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:
- ret = generic_ptrace_peekdata(child, addr, data);
- break;
-
/* read the word at location addr in the USER area. */
case PTRACE_PEEKUSR: {
unsigned long tmp;
@@ -155,12 +160,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
}
- /* when 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 = generic_ptrace_pokedata(child, addr, data);
- break;
-
case PTRACE_POKEUSR:
/* write the word at location addr in the USER area. We must
disallow any changes to certain SR bits or u_fpvalid, since
@@ -192,58 +191,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
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;
- 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;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- struct pt_regs *regs;
-
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- if ((child->ptrace & PT_DTRACE) == 0) {
- /* Spurious delayed TF traps may occur */
- child->ptrace |= PT_DTRACE;
- }
-
- regs = child->thread.uregs;
-
- regs->sr |= SR_SSTEP; /* auto-resetting upon exception */
-
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
default:
ret = ptrace_request(child, request, addr, data);
break;
@@ -341,5 +288,5 @@ asmlinkage void do_software_break_point(unsigned long long vec,
*/
void ptrace_disable(struct task_struct *child)
{
- /* nothing to do.. */
+ user_disable_single_step(child);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 20:03:56 +0000