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Diffstat (limited to 'arch/ia64/kernel/ptrace.c')
-rw-r--r--arch/ia64/kernel/ptrace.c175
1 files changed, 84 insertions, 91 deletions
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 2a9943b5947..b7a5fffe092 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -11,23 +11,21 @@
*/
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
-#include <linux/smp_lock.h>
#include <linux/user.h>
#include <linux/security.h>
#include <linux/audit.h>
#include <linux/signal.h>
#include <linux/regset.h>
#include <linux/elf.h>
+#include <linux/tracehook.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/ptrace_offsets.h>
#include <asm/rse.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/unwind.h>
#ifdef CONFIG_PERFMON
@@ -603,7 +601,7 @@ void ia64_ptrace_stop(void)
{
if (test_and_set_tsk_thread_flag(current, TIF_RESTORE_RSE))
return;
- tsk_set_notify_resume(current);
+ set_notify_resume(current);
unw_init_running(do_sync_rbs, ia64_sync_user_rbs);
}
@@ -613,7 +611,6 @@ void ia64_ptrace_stop(void)
void ia64_sync_krbs(void)
{
clear_tsk_thread_flag(current, TIF_RESTORE_RSE);
- tsk_clear_notify_resume(current);
unw_init_running(do_sync_rbs, ia64_sync_kernel_rbs);
}
@@ -640,11 +637,11 @@ ptrace_attach_sync_user_rbs (struct task_struct *child)
*/
read_lock(&tasklist_lock);
- if (child->signal) {
+ if (child->sighand) {
spin_lock_irq(&child->sighand->siglock);
if (child->state == TASK_STOPPED &&
!test_and_set_tsk_thread_flag(child, TIF_RESTORE_RSE)) {
- tsk_set_notify_resume(child);
+ set_notify_resume(child);
child->state = TASK_TRACED;
stopped = 1;
@@ -664,7 +661,7 @@ ptrace_attach_sync_user_rbs (struct task_struct *child)
* job control stop, so that SIGCONT can be used to wake it up.
*/
read_lock(&tasklist_lock);
- if (child->signal) {
+ if (child->sighand) {
spin_lock_irq(&child->sighand->siglock);
if (child->state == TASK_TRACED &&
(child->signal->flags & SIGNAL_STOP_STOPPED)) {
@@ -675,33 +672,6 @@ ptrace_attach_sync_user_rbs (struct task_struct *child)
read_unlock(&tasklist_lock);
}
-static inline int
-thread_matches (struct task_struct *thread, unsigned long addr)
-{
- unsigned long thread_rbs_end;
- struct pt_regs *thread_regs;
-
- if (ptrace_check_attach(thread, 0) < 0)
- /*
- * If the thread is not in an attachable state, we'll
- * ignore it. The net effect is that if ADDR happens
- * to overlap with the portion of the thread's
- * register backing store that is currently residing
- * on the thread's kernel stack, then ptrace() may end
- * up accessing a stale value. But if the thread
- * isn't stopped, that's a problem anyhow, so we're
- * doing as well as we can...
- */
- return 0;
-
- thread_regs = task_pt_regs(thread);
- thread_rbs_end = ia64_get_user_rbs_end(thread, thread_regs, NULL);
- if (!on_kernel_rbs(addr, thread_regs->ar_bspstore, thread_rbs_end))
- return 0;
-
- return 1; /* looks like we've got a winner */
-}
-
/*
* Write f32-f127 back to task->thread.fph if it has been modified.
*/
@@ -1179,7 +1149,8 @@ ptrace_disable (struct task_struct *child)
}
long
-arch_ptrace (struct task_struct *child, long request, long addr, long data)
+arch_ptrace (struct task_struct *child, long request,
+ unsigned long addr, unsigned long data)
{
switch (request) {
case PTRACE_PEEKTEXT:
@@ -1232,57 +1203,25 @@ arch_ptrace (struct task_struct *child, long request, long addr, long data)
}
-static void
-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;
- }
-}
-
/* "asmlinkage" so the input arguments are preserved... */
-asmlinkage void
+asmlinkage long
syscall_trace_enter (long arg0, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
- if (test_thread_flag(TIF_SYSCALL_TRACE)
- && (current->ptrace & PT_PTRACED))
- syscall_trace();
+ if (test_thread_flag(TIF_SYSCALL_TRACE))
+ if (tracehook_report_syscall_entry(&regs))
+ return -ENOSYS;
/* copy user rbs to kernel rbs */
if (test_thread_flag(TIF_RESTORE_RSE))
ia64_sync_krbs();
- if (unlikely(current->audit_context)) {
- long syscall;
- int arch;
-
- if (IS_IA32_PROCESS(&regs)) {
- syscall = regs.r1;
- arch = AUDIT_ARCH_I386;
- } else {
- syscall = regs.r15;
- arch = AUDIT_ARCH_IA64;
- }
- audit_syscall_entry(arch, syscall, arg0, arg1, arg2, arg3);
- }
+ audit_syscall_entry(AUDIT_ARCH_IA64, regs.r15, arg0, arg1, arg2, arg3);
+ return 0;
}
/* "asmlinkage" so the input arguments are preserved... */
@@ -1292,19 +1231,13 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
- if (unlikely(current->audit_context)) {
- int success = AUDITSC_RESULT(regs.r10);
- long result = regs.r8;
+ int step;
- if (success != AUDITSC_SUCCESS)
- result = -result;
- audit_syscall_exit(success, result);
- }
+ audit_syscall_exit(&regs);
- if ((test_thread_flag(TIF_SYSCALL_TRACE)
- || test_thread_flag(TIF_SINGLESTEP))
- && (current->ptrace & PT_PTRACED))
- syscall_trace();
+ step = test_thread_flag(TIF_SINGLESTEP);
+ if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(&regs, step);
/* copy user rbs to kernel rbs */
if (test_thread_flag(TIF_RESTORE_RSE))
@@ -1940,7 +1873,7 @@ gpregs_writeback(struct task_struct *target,
{
if (test_and_set_tsk_thread_flag(target, TIF_RESTORE_RSE))
return 0;
- tsk_set_notify_resume(target);
+ set_notify_resume(target);
return do_regset_call(do_gpregs_writeback, target, regset, 0, 0,
NULL, NULL);
}
@@ -2192,10 +2125,70 @@ static const struct user_regset_view user_ia64_view = {
const struct user_regset_view *task_user_regset_view(struct task_struct *tsk)
{
-#ifdef CONFIG_IA32_SUPPORT
- extern const struct user_regset_view user_ia32_view;
- if (IS_IA32_PROCESS(task_pt_regs(tsk)))
- return &user_ia32_view;
-#endif
return &user_ia64_view;
}
+
+struct syscall_get_set_args {
+ unsigned int i;
+ unsigned int n;
+ unsigned long *args;
+ struct pt_regs *regs;
+ int rw;
+};
+
+static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data)
+{
+ struct syscall_get_set_args *args = data;
+ struct pt_regs *pt = args->regs;
+ unsigned long *krbs, cfm, ndirty;
+ int i, count;
+
+ if (unw_unwind_to_user(info) < 0)
+ return;
+
+ cfm = pt->cr_ifs;
+ krbs = (unsigned long *)info->task + IA64_RBS_OFFSET/8;
+ ndirty = ia64_rse_num_regs(krbs, krbs + (pt->loadrs >> 19));
+
+ count = 0;
+ if (in_syscall(pt))
+ count = min_t(int, args->n, cfm & 0x7f);
+
+ for (i = 0; i < count; i++) {
+ if (args->rw)
+ *ia64_rse_skip_regs(krbs, ndirty + i + args->i) =
+ args->args[i];
+ else
+ args->args[i] = *ia64_rse_skip_regs(krbs,
+ ndirty + i + args->i);
+ }
+
+ if (!args->rw) {
+ while (i < args->n) {
+ args->args[i] = 0;
+ i++;
+ }
+ }
+}
+
+void ia64_syscall_get_set_arguments(struct task_struct *task,
+ struct pt_regs *regs, unsigned int i, unsigned int n,
+ unsigned long *args, int rw)
+{
+ struct syscall_get_set_args data = {
+ .i = i,
+ .n = n,
+ .args = args,
+ .regs = regs,
+ .rw = rw,
+ };
+
+ if (task == current)
+ unw_init_running(syscall_get_set_args_cb, &data);
+ else {
+ struct unw_frame_info ufi;
+ memset(&ufi, 0, sizeof(ufi));
+ unw_init_from_blocked_task(&ufi, task);
+ syscall_get_set_args_cb(&ufi, &data);
+ }
+}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 18:07:19 +0000