2 * Based on arch/arm/include/asm/ptrace.h
4 * Copyright (C) 1996-2003 Russell King
5 * Copyright (C) 2012 ARM Ltd.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #ifndef __ASM_PTRACE_H
20 #define __ASM_PTRACE_H
22 #include <uapi/asm/ptrace.h>
24 /* Current Exception Level values, as contained in CurrentEL */
25 #define CurrentEL_EL1 (1 << 2)
26 #define CurrentEL_EL2 (2 << 2)
28 /* AArch32-specific ptrace requests */
29 #define COMPAT_PTRACE_GETREGS 12
30 #define COMPAT_PTRACE_SETREGS 13
31 #define COMPAT_PTRACE_GET_THREAD_AREA 22
32 #define COMPAT_PTRACE_SET_SYSCALL 23
33 #define COMPAT_PTRACE_GETVFPREGS 27
34 #define COMPAT_PTRACE_SETVFPREGS 28
35 #define COMPAT_PTRACE_GETHBPREGS 29
36 #define COMPAT_PTRACE_SETHBPREGS 30
38 /* AArch32 CPSR bits */
39 #define COMPAT_PSR_MODE_MASK 0x0000001f
40 #define COMPAT_PSR_MODE_USR 0x00000010
41 #define COMPAT_PSR_MODE_FIQ 0x00000011
42 #define COMPAT_PSR_MODE_IRQ 0x00000012
43 #define COMPAT_PSR_MODE_SVC 0x00000013
44 #define COMPAT_PSR_MODE_ABT 0x00000017
45 #define COMPAT_PSR_MODE_HYP 0x0000001a
46 #define COMPAT_PSR_MODE_UND 0x0000001b
47 #define COMPAT_PSR_MODE_SYS 0x0000001f
48 #define COMPAT_PSR_T_BIT 0x00000020
49 #define COMPAT_PSR_E_BIT 0x00000200
50 #define COMPAT_PSR_F_BIT 0x00000040
51 #define COMPAT_PSR_I_BIT 0x00000080
52 #define COMPAT_PSR_A_BIT 0x00000100
53 #define COMPAT_PSR_E_BIT 0x00000200
54 #define COMPAT_PSR_J_BIT 0x01000000
55 #define COMPAT_PSR_Q_BIT 0x08000000
56 #define COMPAT_PSR_V_BIT 0x10000000
57 #define COMPAT_PSR_C_BIT 0x20000000
58 #define COMPAT_PSR_Z_BIT 0x40000000
59 #define COMPAT_PSR_N_BIT 0x80000000
60 #define COMPAT_PSR_IT_MASK 0x0600fc00 /* If-Then execution state mask */
62 * These are 'magic' values for PTRACE_PEEKUSR that return info about where a
63 * process is located in memory.
65 #define COMPAT_PT_TEXT_ADDR 0x10000
66 #define COMPAT_PT_DATA_ADDR 0x10004
67 #define COMPAT_PT_TEXT_END_ADDR 0x10008
70 /* sizeof(struct user) for AArch32 */
71 #define COMPAT_USER_SZ 296
73 /* Architecturally defined mapping between AArch32 and AArch64 registers */
74 #define compat_usr(x) regs[(x)]
75 #define compat_fp regs[11]
76 #define compat_sp regs[13]
77 #define compat_lr regs[14]
78 #define compat_sp_hyp regs[15]
79 #define compat_sp_irq regs[16]
80 #define compat_lr_irq regs[17]
81 #define compat_sp_svc regs[18]
82 #define compat_lr_svc regs[19]
83 #define compat_sp_abt regs[20]
84 #define compat_lr_abt regs[21]
85 #define compat_sp_und regs[22]
86 #define compat_lr_und regs[23]
87 #define compat_r8_fiq regs[24]
88 #define compat_r9_fiq regs[25]
89 #define compat_r10_fiq regs[26]
90 #define compat_r11_fiq regs[27]
91 #define compat_r12_fiq regs[28]
92 #define compat_sp_fiq regs[29]
93 #define compat_lr_fiq regs[30]
96 * This struct defines the way the registers are stored on the stack during an
97 * exception. Note that sizeof(struct pt_regs) has to be a multiple of 16 (for
98 * stack alignment). struct user_pt_regs must form a prefix of struct pt_regs.
102 struct user_pt_regs user_regs;
114 #define arch_has_single_step() (1)
117 #define compat_thumb_mode(regs) \
118 (((regs)->pstate & COMPAT_PSR_T_BIT))
120 #define compat_thumb_mode(regs) (0)
123 #define user_mode(regs) \
124 (((regs)->pstate & PSR_MODE_MASK) == PSR_MODE_EL0t)
126 #define compat_user_mode(regs) \
127 (((regs)->pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) == \
128 (PSR_MODE32_BIT | PSR_MODE_EL0t))
130 #define processor_mode(regs) \
131 ((regs)->pstate & PSR_MODE_MASK)
133 #define interrupts_enabled(regs) \
134 (!((regs)->pstate & PSR_I_BIT))
136 #define fast_interrupts_enabled(regs) \
137 (!((regs)->pstate & PSR_F_BIT))
139 #define user_stack_pointer(regs) \
140 (!compat_user_mode(regs) ? (regs)->sp : (regs)->compat_sp)
142 static inline unsigned long regs_return_value(struct pt_regs *regs)
144 return regs->regs[0];
148 * Are the current registers suitable for user mode? (used to maintain
149 * security in signal handlers)
151 static inline int valid_user_regs(struct user_pt_regs *regs)
153 if (user_mode(regs) && (regs->pstate & PSR_I_BIT) == 0) {
154 regs->pstate &= ~(PSR_F_BIT | PSR_A_BIT);
156 /* The T bit is reserved for AArch64 */
157 if (!(regs->pstate & PSR_MODE32_BIT))
158 regs->pstate &= ~COMPAT_PSR_T_BIT;
164 * Force PSR to something logical...
166 regs->pstate &= PSR_f | PSR_s | (PSR_x & ~PSR_A_BIT) | \
167 COMPAT_PSR_T_BIT | PSR_MODE32_BIT;
169 if (!(regs->pstate & PSR_MODE32_BIT)) {
170 regs->pstate &= ~COMPAT_PSR_T_BIT;
171 regs->pstate |= PSR_MODE_EL0t;
177 #define instruction_pointer(regs) ((unsigned long)(regs)->pc)
180 extern unsigned long profile_pc(struct pt_regs *regs);
182 #define profile_pc(regs) instruction_pointer(regs)
185 #endif /* __ASSEMBLY__ */