1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * Amit Bhor, Sameer Dhavale: Codito Technologies 2004 9 */ 10 11 #ifndef _UAPI__ASM_ARC_PTRACE_H 12 #define _UAPI__ASM_ARC_PTRACE_H 13 14 15 #ifndef __ASSEMBLY__ 16 /* 17 * Userspace ABI: Register state needed by 18 * -ptrace (gdbserver) 19 * -sigcontext (SA_SIGNINFO signal frame) 20 * 21 * This is to decouple pt_regs from user-space ABI, to be able to change it 22 * w/o affecting the ABI. 23 * 24 * The intermediate pad,pad2 are relics of initial layout based on pt_regs 25 * for optimizations when copying pt_regs to/from user_regs_struct. 26 * We no longer need them, but can't be changed as they are part of ABI now. 27 * 28 * Also, sigcontext only care about the scratch regs as that is what we really 29 * save/restore for signal handling. However gdb also uses the same struct 30 * hence callee regs need to be in there too. 31 */ 32 struct user_regs_struct { 33 34 long pad; 35 struct { 36 long bta, lp_start, lp_end, lp_count; 37 long status32, ret, blink, fp, gp; 38 long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0; 39 long sp; 40 } scratch; 41 long pad2; 42 struct { 43 long r25, r24, r23, r22, r21, r20; 44 long r19, r18, r17, r16, r15, r14, r13; 45 } callee; 46 long efa; /* break pt addr, for break points in delay slots */ 47 long stop_pc; /* give dbg stop_pc after ensuring brkpt trap */ 48 }; 49 #endif /* !__ASSEMBLY__ */ 50 51 #endif /* _UAPI__ASM_ARC_PTRACE_H */ 52