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authorPaul Mundt <lethal@linux-sh.org>2008-09-12 19:52:36 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-09-12 19:52:36 +0900
commit934135c19d8a1be435bae75aefc09b8ae1698b16 (patch)
tree825be606c643ed792a2973263cade41d05171cde /arch/sh/kernel/ptrace_32.c
parent09558748464a9afafe2848a3ad4cfd509c9b0fb6 (diff)
sh: ptrace: Introduce user_regset interface for gp regs.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/ptrace_32.c')
-rw-r--r--arch/sh/kernel/ptrace_32.c116
1 files changed, 99 insertions, 17 deletions
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index 84bf3420597..5e3ba10255c 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -1,12 +1,14 @@
/*
- * linux/arch/sh/kernel/ptrace.c
+ * SuperH process tracing
*
- * Original x86 implementation:
- * By Ross Biro 1/23/92
- * edited by Linus Torvalds
+ * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
+ * Copyright (C) 2002 - 2008 Paul Mundt
*
- * SuperH version: Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
- * Audit support: Yuichi Nakamura <ynakam@hitachisoft.jp>
+ * Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
+ *
+ * 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/sched.h>
@@ -22,6 +24,8 @@
#include <linux/audit.h>
#include <linux/seccomp.h>
#include <linux/tracehook.h>
+#include <linux/elf.h>
+#include <linux/regset.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -30,11 +34,6 @@
#include <asm/syscalls.h>
/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
* This routine will get a word off of the process kernel stack.
*/
static inline int get_stack_long(struct task_struct *task, int offset)
@@ -62,16 +61,12 @@ static inline int put_stack_long(struct task_struct *task, int offset,
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;
+ child->thread.ubc_pc = get_stack_long(child,
+ offsetof(struct pt_regs, pc));
set_tsk_thread_flag(child, TIF_SINGLESTEP);
}
@@ -103,6 +98,83 @@ void ptrace_disable(struct task_struct *child)
user_disable_single_step(child);
}
+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;
+
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ 0, 16 * sizeof(unsigned long));
+ if (!ret)
+ /* PC, PR, SR, GBR, MACH, MACL, TRA */
+ ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ &regs->pc,
+ offsetof(struct pt_regs, pc),
+ sizeof(struct pt_regs));
+ 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;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ regs->regs,
+ 0, 16 * sizeof(unsigned long));
+ if (!ret && count > 0)
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &regs->pc,
+ offsetof(struct pt_regs, pc),
+ sizeof(struct pt_regs));
+ if (!ret)
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ sizeof(struct pt_regs), -1);
+
+ return ret;
+}
+
+/*
+ * These are our native regset flavours.
+ */
+enum sh_regset {
+ REGSET_GENERAL,
+};
+
+static const struct user_regset sh_regsets[] = {
+ /*
+ * Format is:
+ * R0 --> R15
+ * PC, PR, SR, GBR, MACH, MACL, TRA
+ */
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(long),
+ .align = sizeof(long),
+ .get = genregs_get,
+ .set = genregs_set,
+ },
+};
+
+static const struct user_regset_view user_sh_native_view = {
+ .name = "sh",
+ .e_machine = EM_SH,
+ .regsets = sh_regsets,
+ .n = ARRAY_SIZE(sh_regsets),
+};
+
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
struct user * dummy = NULL;
@@ -159,6 +231,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
}
break;
+ case PTRACE_GETREGS:
+ return copy_regset_to_user(child, &user_sh_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (void __user *)data);
+ case PTRACE_SETREGS:
+ return copy_regset_from_user(child, &user_sh_native_view,
+ REGSET_GENERAL,
+ 0, sizeof(struct pt_regs),
+ (const void __user *)data);
#ifdef CONFIG_SH_DSP
case PTRACE_GETDSPREGS: {
unsigned long dp;