4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
8 * OpenRISC implementation:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
19 #ifndef __ASM_OPENRISC_PTRACE_H
20 #define __ASM_OPENRISC_PTRACE_H
22 #include <asm/spr_defs.h>
26 * This is the layout of the regset returned by the GETREGSET ptrace call
28 struct user_regs_struct
{
30 unsigned long gpr
[32];
41 * Make kernel PTrace/register structures opaque to userspace... userspace can
42 * access thread state via the regset mechanism. This allows us a bit of
43 * flexibility in how we order the registers on the stack, permitting some
44 * optimizations like packing call-clobbered registers together so that
45 * they share a cacheline (not done yet, though... future optimization).
50 * This struct describes how the registers are laid out on the kernel stack
51 * during a syscall or other kernel entry.
53 * This structure should always be cacheline aligned on the stack.
54 * FIXME: I don't think that's the case right now. The alignment is
55 * taken care of elsewhere... head.S, process.c, etc.
62 long sr
; /* Stored in place of r0 */
76 long orig_gpr11
; /* For restarting system calls */
77 long syscallno
; /* Syscall number (used by strace) */
78 long dummy
; /* Cheap alignment fix */
80 #endif /* __ASSEMBLY__ */
82 /* TODO: Rename this to REDZONE because that's what it is */
83 #define STACK_FRAME_OVERHEAD 128 /* size of minimum stack frame */
85 #define instruction_pointer(regs) ((regs)->pc)
86 #define user_mode(regs) (((regs)->sr & SPR_SR_SM) == 0)
87 #define user_stack_pointer(regs) ((unsigned long)(regs)->sp)
88 #define profile_pc(regs) instruction_pointer(regs)
91 * Offsets used by 'ptrace' system call interface.
126 #define PT_ORIG_GPR11 132
127 #define PT_SYSCALLNO 136
129 #endif /* __KERNEL__ */
131 #endif /* __ASM_OPENRISC_PTRACE_H */