54d46ea993
Pull signal handling cleanups from Al Viro: "sigaltstack infrastructure + conversion for x86, alpha and um, COMPAT_SYSCALL_DEFINE infrastructure. Note that there are several conflicts between "unify SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline; resolution is trivial - just remove definitions of SS_ONSTACK and SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and include/uapi/linux/signal.h contains the unified variant." Fixed up conflicts as per Al. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: alpha: switch to generic sigaltstack new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those generic compat_sys_sigaltstack() introduce generic sys_sigaltstack(), switch x86 and um to it new helper: compat_user_stack_pointer() new helper: restore_altstack() unify SS_ONSTACK/SS_DISABLE definitions new helper: current_user_stack_pointer() missing user_stack_pointer() instances Bury the conditionals from kernel_thread/kernel_execve series COMPAT_SYSCALL_DEFINE: infrastructure
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/*
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* Copyright 2004-2008 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _BFIN_PTRACE_H
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#define _BFIN_PTRACE_H
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#include <uapi/asm/ptrace.h>
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#ifndef __ASSEMBLY__
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/* user_mode returns true if only one bit is set in IPEND, other than the
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master interrupt enable. */
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#define user_mode(regs) (!(((regs)->ipend & ~0x10) & (((regs)->ipend & ~0x10) - 1)))
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#define arch_has_single_step() (1)
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/* common code demands this function */
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#define ptrace_disable(child) user_disable_single_step(child)
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#define current_user_stack_pointer() rdusp()
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extern int is_user_addr_valid(struct task_struct *child,
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unsigned long start, unsigned long len);
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/*
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* Get the address of the live pt_regs for the specified task.
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* These are saved onto the top kernel stack when the process
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* is not running.
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*
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* Note: if a user thread is execve'd from kernel space, the
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* kernel stack will not be empty on entry to the kernel, so
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* ptracing these tasks will fail.
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*/
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#define task_pt_regs(task) \
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(struct pt_regs *) \
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((unsigned long)task_stack_page(task) + \
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(THREAD_SIZE - sizeof(struct pt_regs)))
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#include <asm-generic/ptrace.h>
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#endif /* __ASSEMBLY__ */
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#endif /* _BFIN_PTRACE_H */
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