diff options
Diffstat (limited to 'arch/cris/kernel/ptrace.c')
| -rw-r--r-- | arch/cris/kernel/ptrace.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/arch/cris/kernel/ptrace.c b/arch/cris/kernel/ptrace.c new file mode 100644 index 00000000000..e85a2fdd9ac --- /dev/null +++ b/arch/cris/kernel/ptrace.c @@ -0,0 +1,119 @@ +/* + * linux/arch/cris/kernel/ptrace.c + * + * Parts taken from the m68k port. + * + * Copyright (c) 2000, 2001, 2002 Axis Communications AB + * + * Authors: Bjorn Wesen + * + * $Log: ptrace.c,v $ + * Revision 1.9 2003/07/04 12:56:11 tobiasa + * Moved arch-specific code to arch-specific files. + * + * Revision 1.8 2003/04/09 05:20:47 starvik + * Merge of Linux 2.5.67 + * + * Revision 1.7 2002/11/27 08:42:34 starvik + * Argument to user_regs() is thread_info* + * + * Revision 1.6 2002/11/20 11:56:11 starvik + * Merge of Linux 2.5.48 + * + * Revision 1.5 2002/11/18 07:41:19 starvik + * Removed warning + * + * Revision 1.4 2002/11/11 12:47:28 starvik + * SYSCALL_TRACE has been moved to thread flags + * + * Revision 1.3 2002/02/05 15:37:18 bjornw + * * Add do_notify_resume (replaces do_signal in the callchain) + * * syscall_trace is now do_syscall_trace + * * current->ptrace flag PT_TRACESYS -> PT_SYSCALLTRACE + * * Keep track of the current->work.syscall_trace counter + * + * Revision 1.2 2001/12/18 13:35:20 bjornw + * Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15). + * + * Revision 1.8 2001/11/12 18:26:21 pkj + * Fixed compiler warnings. + * + * Revision 1.7 2001/09/26 11:53:49 bjornw + * PTRACE_DETACH works more simple in 2.4.10 + * + * Revision 1.6 2001/07/25 16:08:47 bjornw + * PTRACE_ATTACH bulk moved into arch-independent code in 2.4.7 + * + * Revision 1.5 2001/03/26 14:24:28 orjanf + * * Changed loop condition. + * * Added comment documenting non-standard ptrace behaviour. + * + * Revision 1.4 2001/03/20 19:44:41 bjornw + * Use the user_regs macro instead of thread.esp0 + * + * Revision 1.3 2000/12/18 23:45:25 bjornw + * Linux/CRIS first version + * + * + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/errno.h> +#include <linux/ptrace.h> +#include <linux/user.h> + +#include <asm/uaccess.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> + +/* + * Get contents of register REGNO in task TASK. + */ +inline long get_reg(struct task_struct *task, unsigned int regno) +{ + /* USP is a special case, it's not in the pt_regs struct but + * in the tasks thread struct + */ + + if (regno == PT_USP) + return task->thread.usp; + else if (regno < PT_MAX) + return ((unsigned long *)user_regs(task->thread_info))[regno]; + else + return 0; +} + +/* + * Write contents of register REGNO in task TASK. + */ +inline int put_reg(struct task_struct *task, unsigned int regno, + unsigned long data) +{ + if (regno == PT_USP) + task->thread.usp = data; + else if (regno < PT_MAX) + ((unsigned long *)user_regs(task->thread_info))[regno] = data; + else + return -1; + return 0; +} + +/* notification of userspace execution resumption + * - triggered by current->work.notify_resume + */ +extern int do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs); + + +void do_notify_resume(int canrestart, sigset_t *oldset, struct pt_regs *regs, + __u32 thread_info_flags ) +{ + /* deal with pending signal delivery */ + if (thread_info_flags & _TIF_SIGPENDING) + do_signal(canrestart,oldset,regs); +} |