1 #ifndef _PPC64_PTRACE_H
2 #define _PPC64_PTRACE_H
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This struct defines the way the registers are stored on the
8 * kernel stack during a system call or other kernel entry.
10 * this should only contain volatile regs
11 * since we can keep non-volatile in the thread_struct
12 * should set this up when only volatiles are saved
15 * Since this is going on the stack, *CARE MUST BE TAKEN* to insure
16 * that the overall structure is a multiple of 16 bytes in length.
18 * Note that the offsets of the fields in this struct correspond with
19 * the PT_* values below. This simplifies arch/ppc64/kernel/ptrace.c.
21 * This program is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU General Public License
23 * as published by the Free Software Foundation; either version
24 * 2 of the License, or (at your option) any later version.
28 #define PPC_REG unsigned long
33 PPC_REG orig_gpr3; /* Used for restarting system calls */
38 PPC_REG softe; /* Soft enabled/disabled */
39 PPC_REG trap; /* Reason for being here */
40 PPC_REG dar; /* Fault registers */
42 PPC_REG result; /* Result of a system call */
45 #define PPC_REG_32 unsigned int
50 PPC_REG_32 orig_gpr3; /* Used for restarting system calls */
55 PPC_REG_32 mq; /* 601 only (not used at present) */
56 /* Used on APUS to hold IPL value. */
57 PPC_REG_32 trap; /* Reason for being here */
58 PPC_REG_32 dar; /* Fault registers */
60 PPC_REG_32 result; /* Result of a system call */
63 #define instruction_pointer(regs) ((regs)->nip)
65 extern unsigned long profile_pc(struct pt_regs *regs);
67 #define profile_pc(regs) instruction_pointer(regs)
70 #endif /* __ASSEMBLY__ */
72 #define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
74 /* Size of dummy stack frame allocated when calling signal handler. */
75 #define __SIGNAL_FRAMESIZE 128
76 #define __SIGNAL_FRAMESIZE32 64
78 #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
80 #define force_successful_syscall_return() \
81 (current_thread_info()->syscall_noerror = 1)
84 * We use the least-significant bit of the trap field to indicate
85 * whether we have saved the full set of registers, or only a
86 * partial set. A 1 there means the partial set.
88 #define FULL_REGS(regs) (((regs)->trap & 1) == 0)
89 #define TRAP(regs) ((regs)->trap & ~0xF)
90 #define CHECK_FULL_REGS(regs) BUG_ON(regs->trap & 1)
93 * Offsets used by 'ptrace' system call interface.
131 #define PT_ORIG_R3 34
142 /* Kernel and userspace will both use this PT_FPSCR value. 32-bit apps will have
143 * visibility to the asm-ppc/ptrace.h header instead of this one.
145 #define PT_FPSCR (PT_FPR0 + 32) /* each FP reg occupies 1 slot in 64-bit space */
148 #define PT_FPSCR32 (PT_FPR0 + 2*32 + 1) /* each FP reg occupies 2 32-bit userspace slots */
151 #define PT_VR0 82 /* each Vector reg occupies 2 slots in 64-bit */
152 #define PT_VSCR (PT_VR0 + 32*2 + 1)
153 #define PT_VRSAVE (PT_VR0 + 33*2)
156 #define PT_VR0_32 164 /* each Vector reg occupies 4 slots in 32-bit */
157 #define PT_VSCR_32 (PT_VR0 + 32*4 + 3)
158 #define PT_VRSAVE_32 (PT_VR0 + 33*4)
162 * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
163 * The transfer totals 34 quadword. Quadwords 0-31 contain the
164 * corresponding vector registers. Quadword 32 contains the vscr as the
165 * last word (offset 12) within that quadword. Quadword 33 contains the
166 * vrsave as the first word (offset 0) within the quadword.
168 * This definition of the VMX state is compatible with the current PPC32
169 * ptrace interface. This allows signal handling and ptrace to use the same
170 * structures. This also simplifies the implementation of a bi-arch
171 * (combined (32- and 64-bit) gdb.
173 #define PTRACE_GETVRREGS 18
174 #define PTRACE_SETVRREGS 19
176 /* Additional PTRACE requests implemented on PowerPC. */
177 #define PPC_PTRACE_GETREGS 0x99 /* Get GPRs 0 - 31 */
178 #define PPC_PTRACE_SETREGS 0x98 /* Set GPRs 0 - 31 */
179 #define PPC_PTRACE_GETFPREGS 0x97 /* Get FPRs 0 - 31 */
180 #define PPC_PTRACE_SETFPREGS 0x96 /* Set FPRs 0 - 31 */
181 #define PPC_PTRACE_PEEKTEXT_3264 0x95 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
182 #define PPC_PTRACE_PEEKDATA_3264 0x94 /* Read word at location ADDR on a 64-bit process from a 32-bit process. */
183 #define PPC_PTRACE_POKETEXT_3264 0x93 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
184 #define PPC_PTRACE_POKEDATA_3264 0x92 /* Write word at location ADDR on a 64-bit process from a 32-bit process. */
185 #define PPC_PTRACE_PEEKUSR_3264 0x91 /* Read a register (specified by ADDR) out of the "user area" on a 64-bit process from a 32-bit process. */
186 #define PPC_PTRACE_POKEUSR_3264 0x90 /* Write DATA into location ADDR within the "user area" on a 64-bit process from a 32-bit process. */
189 #endif /* _PPC64_PTRACE_H */