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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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6a542d1d5f
Once upon at it was used on hot paths, but that had not been true since 2013. IOW, there's no point for arch-optimized equivalent of task_pt_regs(current) - remaining two users are not worth bothering with. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
28 lines
715 B
C
28 lines
715 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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 force_successful_syscall_return() (current_pt_regs()->r0 = 0)
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static inline unsigned long regs_return_value(struct pt_regs *regs)
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{
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return regs->r0;
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}
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#endif
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