diff options
Diffstat (limited to 'arch/sh/kernel/ptrace_32.c')
| -rw-r--r-- | arch/sh/kernel/ptrace_32.c | 116 |
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)®s->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, + ®s->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, + ®s->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; |