440e6ca79a
Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT, PTRACE_KILL and PTRACE_SINGLESTEP. This implies defining arch_has_single_step in <asm/ptrace.h> and implementing the user_enable_single_step and user_disable_single_step functions, which also causes the breakpoint information to be cleared on fork, which could be considered a bug fix. Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which it previously wasn't and the single stepping disable only happens if the tracee process isn't a zombie yet, which is consistent with all architectures using the modern ptrace code. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
38 lines
939 B
C
38 lines
939 B
C
/*
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* linux/arch/arm/kernel/ptrace.h
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*
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* Copyright (C) 2000-2003 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/ptrace.h>
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extern void ptrace_cancel_bpt(struct task_struct *);
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extern void ptrace_set_bpt(struct task_struct *);
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extern void ptrace_break(struct task_struct *, struct pt_regs *);
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/*
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* Send SIGTRAP if we're single-stepping
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*/
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static inline void single_step_trap(struct task_struct *task)
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{
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if (task->ptrace & PT_SINGLESTEP) {
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ptrace_cancel_bpt(task);
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send_sig(SIGTRAP, task, 1);
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}
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}
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static inline void single_step_clear(struct task_struct *task)
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{
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if (task->ptrace & PT_SINGLESTEP)
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ptrace_cancel_bpt(task);
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}
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static inline void single_step_set(struct task_struct *task)
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{
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if (task->ptrace & PT_SINGLESTEP)
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ptrace_set_bpt(task);
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}
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