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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
23 lines
624 B
C
23 lines
624 B
C
#ifndef _ASMAXP_PTRACE_H
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#define _ASMAXP_PTRACE_H
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#include <uapi/asm/ptrace.h>
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#define arch_has_single_step() (1)
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#define user_mode(regs) (((regs)->ps & 8) != 0)
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#define instruction_pointer(regs) ((regs)->pc)
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#define profile_pc(regs) instruction_pointer(regs)
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#define current_user_stack_pointer() rdusp()
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#define task_pt_regs(task) \
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((struct pt_regs *) (task_stack_page(task) + 2*PAGE_SIZE) - 1)
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#define current_pt_regs() \
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((struct pt_regs *) ((char *)current_thread_info() + 2*PAGE_SIZE) - 1)
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#define signal_pt_regs current_pt_regs
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#define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
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#endif
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