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sh: ptrace: Introduce user_regset interface for gp regs.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-09-12 19:52:36 +09:00
parent 0955874846
commit 934135c19d
3 changed files with 115 additions and 18 deletions
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9
arch/sh/include/asm/elf.h
View file

@ -108,6 +108,15 @@ typedef struct user_fpu_struct elf_fpregset_t;
#define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
#if defined(CONFIG_SUPERH32) && \
(!defined(CONFIG_SH_FPU) && !defined(CONFIG_SH_DSP))
/*
* Enable dump using regset for general purpose registers, use this as
* the default once the FPU and DSP registers are moved over also.
*/
#define CORE_DUMP_USE_REGSET
#endif
#define USE_ELF_CORE_DUMP
#define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC
#define ELF_EXEC_PAGESIZE PAGE_SIZE

8
arch/sh/include/asm/ptrace.h
View file

@ -87,12 +87,18 @@ struct pt_dspregs {
unsigned long mod;
};
#define PTRACE_GETREGS 12 /* General registers */
#define PTRACE_SETREGS 13
#define PTRACE_GETFPREGS 14 /* FPU registers */
#define PTRACE_SETFPREGS 15
#define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
#define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
#define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
#define PTRACE_GETDSPREGS 55
#define PTRACE_GETDSPREGS 55 /* DSP registers */
#define PTRACE_SETDSPREGS 56
#endif

116
arch/sh/kernel/ptrace_32.c
View file

@ -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>
@ -29,11 +33,6 @@
#include <asm/mmu_context.h>
#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.
*/
@ -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;