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120 lines
3.1 KiB
120 lines
3.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* OpenRISC Linux |
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* |
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* Linux architectural port borrowing liberally from similar works of |
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* others. All original copyrights apply as per the original source |
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* declaration. |
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* |
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* OpenRISC implementation: |
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* Copyright (C) 2003 Matjaz Breskvar <[email protected]> |
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* Copyright (C) 2010-2011 Jonas Bonn <[email protected]> |
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* et al. |
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*/ |
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#ifndef __ASM_OPENRISC_PTRACE_H |
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#define __ASM_OPENRISC_PTRACE_H |
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#include <asm/spr_defs.h> |
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#include <uapi/asm/ptrace.h> |
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/* |
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* Make kernel PTrace/register structures opaque to userspace... userspace can |
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* access thread state via the regset mechanism. This allows us a bit of |
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* flexibility in how we order the registers on the stack, permitting some |
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* optimizations like packing call-clobbered registers together so that |
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* they share a cacheline (not done yet, though... future optimization). |
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*/ |
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#ifndef __ASSEMBLY__ |
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/* |
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* This struct describes how the registers are laid out on the kernel stack |
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* during a syscall or other kernel entry. |
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* |
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* This structure should always be cacheline aligned on the stack. |
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* FIXME: I don't think that's the case right now. The alignment is |
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* taken care of elsewhere... head.S, process.c, etc. |
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*/ |
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struct pt_regs { |
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union { |
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struct { |
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/* Named registers */ |
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long sr; /* Stored in place of r0 */ |
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long sp; /* r1 */ |
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}; |
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struct { |
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/* Old style */ |
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long offset[2]; |
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long gprs[30]; |
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}; |
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struct { |
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/* New style */ |
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long gpr[32]; |
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}; |
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}; |
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long pc; |
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/* For restarting system calls: |
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* Set to syscall number for syscall exceptions, |
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* -1 for all other exceptions. |
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*/ |
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long orig_gpr11; /* For restarting system calls */ |
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long dummy; /* Cheap alignment fix */ |
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long dummy2; /* Cheap alignment fix */ |
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}; |
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/* TODO: Rename this to REDZONE because that's what it is */ |
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#define STACK_FRAME_OVERHEAD 128 /* size of minimum stack frame */ |
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#define instruction_pointer(regs) ((regs)->pc) |
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#define user_mode(regs) (((regs)->sr & SPR_SR_SM) == 0) |
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#define user_stack_pointer(regs) ((unsigned long)(regs)->sp) |
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#define profile_pc(regs) instruction_pointer(regs) |
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static inline long regs_return_value(struct pt_regs *regs) |
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{ |
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return regs->gpr[11]; |
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} |
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#endif /* __ASSEMBLY__ */ |
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/* |
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* Offsets used by 'ptrace' system call interface. |
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*/ |
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#define PT_SR 0 |
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#define PT_SP 4 |
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#define PT_GPR2 8 |
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#define PT_GPR3 12 |
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#define PT_GPR4 16 |
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#define PT_GPR5 20 |
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#define PT_GPR6 24 |
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#define PT_GPR7 28 |
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#define PT_GPR8 32 |
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#define PT_GPR9 36 |
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#define PT_GPR10 40 |
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#define PT_GPR11 44 |
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#define PT_GPR12 48 |
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#define PT_GPR13 52 |
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#define PT_GPR14 56 |
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#define PT_GPR15 60 |
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#define PT_GPR16 64 |
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#define PT_GPR17 68 |
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#define PT_GPR18 72 |
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#define PT_GPR19 76 |
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#define PT_GPR20 80 |
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#define PT_GPR21 84 |
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#define PT_GPR22 88 |
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#define PT_GPR23 92 |
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#define PT_GPR24 96 |
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#define PT_GPR25 100 |
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#define PT_GPR26 104 |
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#define PT_GPR27 108 |
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#define PT_GPR28 112 |
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#define PT_GPR29 116 |
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#define PT_GPR30 120 |
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#define PT_GPR31 124 |
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#define PT_PC 128 |
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#define PT_ORIG_GPR11 132 |
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#define PT_SYSCALLNO 136 |
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#endif /* __ASM_OPENRISC_PTRACE_H */
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