uapi/asm/ptrace.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 /*
0003  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
0004  *
0005  * This program is free software; you can redistribute it and/or modify
0006  * it under the terms of the GNU General Public License version 2 as
0007  * published by the Free Software Foundation.
0008  *
0009  * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
0010  */
0011
0012 #ifndef _UAPI__ASM_ARC_PTRACE_H
0013 #define _UAPI__ASM_ARC_PTRACE_H
0014
0015 #define PTRACE_GET_THREAD_AREA  25
0016
0017 #ifndef __ASSEMBLY__
0018 /*
0019  * Userspace ABI: Register state needed by
0020  *  -ptrace (gdbserver)
0021  *  -sigcontext (SA_SIGNINFO signal frame)
0022  *
0023  * This is to decouple pt_regs from user-space ABI, to be able to change it
0024  * w/o affecting the ABI.
0025  *
0026  * The intermediate pad,pad2 are relics of initial layout based on pt_regs
0027  * for optimizations when copying pt_regs to/from user_regs_struct.
0028  * We no longer need them, but can't be changed as they are part of ABI now.
0029  *
0030  * Also, sigcontext only care about the scratch regs as that is what we really
0031  * save/restore for signal handling. However gdb also uses the same struct
0032  * hence callee regs need to be in there too.
0033 */
0034 struct user_regs_struct {
0035
0036     unsigned long pad;
0037     struct {
0038         unsigned long bta, lp_start, lp_end, lp_count;
0039         unsigned long status32, ret, blink, fp, gp;
0040         unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
0041         unsigned long sp;
0042     } scratch;
0043     unsigned long pad2;
0044     struct {
0045         unsigned long r25, r24, r23, r22, r21, r20;
0046         unsigned long r19, r18, r17, r16, r15, r14, r13;
0047     } callee;
0048     unsigned long efa;  /* break pt addr, for break points in delay slots */
0049     unsigned long stop_pc;  /* give dbg stop_pc after ensuring brkpt trap */
0050 };
0051
0052 struct user_regs_arcv2 {
0053     unsigned long r30, r58, r59;
0054 };
0055
0056 #endif /* !__ASSEMBLY__ */
0057
0058 #endif /* _UAPI__ASM_ARC_PTRACE_H */