/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * arch/sh64/kernel/ptrace.c
+ * arch/sh/kernel/ptrace_64.c
*
* Copyright (C) 2000, 2001 Paolo Alberelli
- * Copyright (C) 2003 Paul Mundt
+ * Copyright (C) 2003 - 2008 Paul Mundt
*
* Started from SH3/4 version:
* SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
* By Ross Biro 1/23/92
* edited by Linus Torvalds
*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
*/
-
#include <linux/kernel.h>
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/user.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
-
+#include <linux/audit.h>
+#include <linux/seccomp.h>
+#include <linux/tracehook.h>
+#include <linux/elf.h>
+#include <linux/regset.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
+#include <asm/syscalls.h>
+#include <asm/fpu.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/syscalls.h>
/* This mask defines the bits of the SR which the user is not allowed to
change, which are everything except S, Q, M, PR, SZ, FR. */
if (last_task_used_math == task) {
enable_fpu();
- save_fpu(task, regs);
+ save_fpu(task);
disable_fpu();
last_task_used_math = 0;
regs->sr |= SR_FD;
}
- tmp = ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)];
+ tmp = ((long *)task->thread.xstate)[addr / sizeof(unsigned long)];
return tmp;
}
regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
if (!tsk_used_math(task)) {
- fpinit(&task->thread.fpu.hard);
- set_stopped_child_used_math(task);
+ init_fpu(task);
} else if (last_task_used_math == task) {
enable_fpu();
- save_fpu(task, regs);
+ save_fpu(task);
disable_fpu();
last_task_used_math = 0;
regs->sr |= SR_FD;
}
- ((long *)&task->thread.fpu)[addr / sizeof(unsigned long)] = data;
+ ((long *)task->thread.xstate)[addr / sizeof(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 */
+
+ set_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ struct pt_regs *regs = child->thread.uregs;
+
+ regs->sr &= ~SR_SSTEP;
+
+ clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+}
+
+static int genregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ const struct pt_regs *regs = task_pt_regs(target);
+ int ret;
+
+ /* PC, SR, SYSCALL */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ ®s->pc,
+ 0, 3 * sizeof(unsigned long long));
+
+ /* R1 -> R63 */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs[0]),
+ 63 * sizeof(unsigned long long));
+ /* TR0 -> TR7 */
+ if (!ret)
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs->tregs,
+ offsetof(struct pt_regs, tregs[0]),
+ 8 * sizeof(unsigned long long));
+
+ if (!ret)
+ ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+static int genregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ struct pt_regs *regs = task_pt_regs(target);
+ int ret;
+
+ /* PC, SR, SYSCALL */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ ®s->pc,
+ 0, 3 * sizeof(unsigned long long));
+
+ /* R1 -> R63 */
+ if (!ret && count > 0)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ offsetof(struct pt_regs, regs[0]),
+ 63 * sizeof(unsigned long long));
+
+ /* TR0 -> TR7 */
+ if (!ret && count > 0)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->tregs,
+ offsetof(struct pt_regs, tregs[0]),
+ 8 * sizeof(unsigned long long));
+
+ if (!ret)
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+#ifdef CONFIG_SH_FPU
+int fpregs_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ int ret;
+
+ ret = init_fpu(target);
+ if (ret)
+ return ret;
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &target->thread.xstate->hardfpu, 0, -1);
+}
+
+static int fpregs_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+
+ ret = init_fpu(target);
+ if (ret)
+ return ret;
+
+ set_stopped_child_used_math(target);
+
+ return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &target->thread.xstate->hardfpu, 0, -1);
+}
+
+static int fpregs_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ return tsk_used_math(target) ? regset->n : 0;
+}
+#endif
+
+/*
+ * These are our native regset flavours.
+ */
+enum sh_regset {
+ REGSET_GENERAL,
+#ifdef CONFIG_SH_FPU
+ REGSET_FPU,
+#endif
+};
+
+static const struct user_regset sh_regsets[] = {
+ /*
+ * Format is:
+ * PC, SR, SYSCALL,
+ * R1 --> R63,
+ * TR0 --> TR7,
+ */
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(long long),
+ .align = sizeof(long long),
+ .get = genregs_get,
+ .set = genregs_set,
+ },
+
+#ifdef CONFIG_SH_FPU
+ [REGSET_FPU] = {
+ .core_note_type = NT_PRFPREG,
+ .n = sizeof(struct user_fpu_struct) /
+ sizeof(long long),
+ .size = sizeof(long long),
+ .align = sizeof(long long),
+ .get = fpregs_get,
+ .set = fpregs_set,
+ .active = fpregs_active,
+ },
+#endif
+};
+
+static const struct user_regset_view user_sh64_native_view = {
+ .name = "sh64",
+ .e_machine = EM_SH,
+ .regsets = sh_regsets,
+ .n = ARRAY_SIZE(sh_regsets),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &user_sh64_native_view;
+}
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;
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
}
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;
- }
-
+ case PTRACE_GETREGS:
+ return copy_regset_to_user(child, &user_sh64_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (void __user *)data);
+ case PTRACE_SETREGS:
+ return copy_regset_from_user(child, &user_sh64_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (const void __user *)data);
+#ifdef CONFIG_SH_FPU
+ case PTRACE_GETFPREGS:
+ return copy_regset_to_user(child, &user_sh64_native_view,
+ REGSET_FPU,
+ 0, sizeof(struct user_fpu_struct),
+ (void __user *)data);
+ case PTRACE_SETFPREGS:
+ return copy_regset_from_user(child, &user_sh64_native_view,
+ REGSET_FPU,
+ 0, sizeof(struct user_fpu_struct),
+ (const void __user *)data);
+#endif
default:
ret = ptrace_request(child, request, addr, data);
break;
}
+
return ret;
}
return sys_ptrace(request, pid, addr, data);
}
-asmlinkage void syscall_trace(void)
+static inline int audit_arch(void)
{
- struct task_struct *tsk = current;
+ int arch = EM_SH;
- if (!test_thread_flag(TIF_SYSCALL_TRACE))
- return;
- if (!(tsk->ptrace & PT_PTRACED))
- return;
+#ifdef CONFIG_64BIT
+ arch |= __AUDIT_ARCH_64BIT;
+#endif
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ arch |= __AUDIT_ARCH_LE;
+#endif
- 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 (tsk->exit_code) {
- send_sig(tsk->exit_code, tsk, 1);
- tsk->exit_code = 0;
- }
+ return arch;
+}
+
+asmlinkage long long do_syscall_trace_enter(struct pt_regs *regs)
+{
+ long long ret = 0;
+
+ secure_computing(regs->regs[9]);
+
+ if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+ tracehook_report_syscall_entry(regs))
+ /*
+ * Tracing decided this syscall should not happen.
+ * We'll return a bogus call number to get an ENOSYS
+ * error, but leave the original number in regs->regs[0].
+ */
+ ret = -1LL;
+
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_enter(regs, regs->regs[9]);
+
+ if (unlikely(current->audit_context))
+ audit_syscall_entry(audit_arch(), regs->regs[1],
+ regs->regs[2], regs->regs[3],
+ regs->regs[4], regs->regs[5]);
+
+ return ret ?: regs->regs[9];
+}
+
+asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
+{
+ int step;
+
+ if (unlikely(current->audit_context))
+ audit_syscall_exit(AUDITSC_RESULT(regs->regs[9]),
+ regs->regs[9]);
+
+ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
+ trace_sys_exit(regs, regs->regs[9]);
+
+ step = test_thread_flag(TIF_SINGLESTEP);
+ if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, step);
}
/* Called with interrupts disabled */
}
/* Called with interrupts disabled */
-asmlinkage void do_software_break_point(unsigned long long vec,
- struct pt_regs *regs)
+BUILD_TRAP_HANDLER(breakpoint)
{
+ TRAP_HANDLER_DECL;
+
/* We need to forward step the PC, to counteract the backstep done
in signal.c. */
local_irq_enable();
*/
void ptrace_disable(struct task_struct *child)
{
- /* nothing to do.. */
+ user_disable_single_step(child);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff