1/* libunwind - a platform-independent unwind library
2   Copyright (C) 2001-2004 Hewlett-Packard Co
3	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4   Copyright (C) 2013 Linaro Limited
5
6This file is part of libunwind.
7
8Permission is hereby granted, free of charge, to any person obtaining
9a copy of this software and associated documentation files (the
10"Software"), to deal in the Software without restriction, including
11without limitation the rights to use, copy, modify, merge, publish,
12distribute, sublicense, and/or sell copies of the Software, and to
13permit persons to whom the Software is furnished to do so, subject to
14the following conditions:
15
16The above copyright notice and this permission notice shall be
17included in all copies or substantial portions of the Software.
18
19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
26
27#ifndef LIBUNWIND_H
28#define LIBUNWIND_H
29
30#if defined(__cplusplus) || defined(c_plusplus)
31extern "C" {
32#endif
33
34#include <inttypes.h>
35#include <stddef.h>
36#include <ucontext.h>
37
38#define UNW_TARGET	aarch64
39#define UNW_TARGET_AARCH64	1
40
41#define _U_TDEP_QP_TRUE	0	/* see libunwind-dynamic.h  */
42
43/* This needs to be big enough to accommodate "struct cursor", while
44   leaving some slack for future expansion.  Changing this value will
45   require recompiling all users of this library.  Stack allocation is
46   relatively cheap and unwind-state copying is relatively rare, so we
47   want to err on making it rather too big than too small.  */
48
49#define UNW_TDEP_CURSOR_LEN	4096
50
51typedef uint64_t unw_word_t;
52typedef int64_t unw_sword_t;
53
54typedef long double unw_tdep_fpreg_t;
55
56typedef struct
57  {
58    /* no aarch64-specific auxiliary proc-info */
59    /* ANDROID support update. */
60    char __reserved;
61    /* End of ANDROID update. */
62  }
63unw_tdep_proc_info_t;
64
65typedef enum
66  {
67    /* 64-bit general registers.  */
68    UNW_AARCH64_X0,
69    UNW_AARCH64_X1,
70    UNW_AARCH64_X2,
71    UNW_AARCH64_X3,
72    UNW_AARCH64_X4,
73    UNW_AARCH64_X5,
74    UNW_AARCH64_X6,
75    UNW_AARCH64_X7,
76    UNW_AARCH64_X8,
77
78    /* Temporary registers.  */
79    UNW_AARCH64_X9,
80    UNW_AARCH64_X10,
81    UNW_AARCH64_X11,
82    UNW_AARCH64_X12,
83    UNW_AARCH64_X13,
84    UNW_AARCH64_X14,
85    UNW_AARCH64_X15,
86
87    /* Intra-procedure-call temporary registers.  */
88    UNW_AARCH64_X16,
89    UNW_AARCH64_X17,
90
91    /* Callee-saved registers.  */
92    UNW_AARCH64_X18,
93    UNW_AARCH64_X19,
94    UNW_AARCH64_X20,
95    UNW_AARCH64_X21,
96    UNW_AARCH64_X22,
97    UNW_AARCH64_X23,
98    UNW_AARCH64_X24,
99    UNW_AARCH64_X25,
100    UNW_AARCH64_X26,
101    UNW_AARCH64_X27,
102    UNW_AARCH64_X28,
103
104    /* 64-bit frame pointer.  */
105    UNW_AARCH64_X29,
106
107    /* 64-bit link register.  */
108    UNW_AARCH64_X30,
109
110    /* 64-bit stack pointer.  */
111    UNW_AARCH64_SP =  31,
112    UNW_AARCH64_PC,
113    UNW_AARCH64_PSTATE,
114
115    /* 128-bit FP/Advanced SIMD registers.  */
116    UNW_AARCH64_V0 = 64,
117    UNW_AARCH64_V1,
118    UNW_AARCH64_V2,
119    UNW_AARCH64_V3,
120    UNW_AARCH64_V4,
121    UNW_AARCH64_V5,
122    UNW_AARCH64_V6,
123    UNW_AARCH64_V7,
124    UNW_AARCH64_V8,
125    UNW_AARCH64_V9,
126    UNW_AARCH64_V10,
127    UNW_AARCH64_V11,
128    UNW_AARCH64_V12,
129    UNW_AARCH64_V13,
130    UNW_AARCH64_V14,
131    UNW_AARCH64_V15,
132    UNW_AARCH64_V16,
133    UNW_AARCH64_V17,
134    UNW_AARCH64_V18,
135    UNW_AARCH64_V19,
136    UNW_AARCH64_V20,
137    UNW_AARCH64_V21,
138    UNW_AARCH64_V22,
139    UNW_AARCH64_V23,
140    UNW_AARCH64_V24,
141    UNW_AARCH64_V25,
142    UNW_AARCH64_V26,
143    UNW_AARCH64_V27,
144    UNW_AARCH64_V28,
145    UNW_AARCH64_V29,
146    UNW_AARCH64_V30,
147    UNW_AARCH64_V31,
148
149    UNW_AARCH64_FPSR,
150    UNW_AARCH64_FPCR,
151
152    /* For AArch64, the CFA is the value of SP (x31) at the call site of the
153       previous frame.  */
154    UNW_AARCH64_CFA = UNW_AARCH64_SP,
155
156    UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR,
157
158    UNW_TDEP_IP = UNW_AARCH64_X30,
159    UNW_TDEP_SP = UNW_AARCH64_SP,
160    UNW_TDEP_EH = UNW_AARCH64_X0,
161
162  }
163aarch64_regnum_t;
164
165/* Use R0 through R3 to pass exception handling information.  */
166#define UNW_TDEP_NUM_EH_REGS	4
167
168typedef struct unw_tdep_save_loc
169  {
170    /* Additional target-dependent info on a save location.  */
171    /* ANDROID support update. */
172    char __reserved;
173    /* End of ANDROID update. */
174  }
175unw_tdep_save_loc_t;
176
177
178/* On AArch64, we can directly use ucontext_t as the unwind context.  */
179typedef ucontext_t unw_tdep_context_t;
180
181#include "libunwind-common.h"
182#include "libunwind-dynamic.h"
183
184/* ANDROID support update. */
185/* There is no getcontext in Android. */
186#define unw_tdep_getcontext(uc) (({					\
187  unw_tdep_context_t *unw_ctx = (uc);					\
188  register uint64_t *unw_base asm ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs;		\
189  __asm__ __volatile__ (						\
190     "stp x0, x1, [%[base], #0]\n" \
191     "stp x2, x3, [%[base], #16]\n" \
192     "stp x4, x5, [%[base], #32]\n" \
193     "stp x6, x7, [%[base], #48]\n" \
194     "stp x8, x9, [%[base], #64]\n" \
195     "stp x10, x11, [%[base], #80]\n" \
196     "stp x12, x13, [%[base], #96]\n" \
197     "stp x14, x13, [%[base], #112]\n" \
198     "stp x16, x17, [%[base], #128]\n" \
199     "stp x18, x19, [%[base], #144]\n" \
200     "stp x20, x21, [%[base], #160]\n" \
201     "stp x22, x23, [%[base], #176]\n" \
202     "stp x24, x25, [%[base], #192]\n" \
203     "stp x26, x27, [%[base], #208]\n" \
204     "stp x28, x29, [%[base], #224]\n" \
205     "str x30, [%[base], #240]\n" \
206     "mov x1, sp\n" \
207     "stp x1, x30, [%[base], #248]\n" \
208     : [base] "+r" (unw_base) : : "x1", "memory"); \
209  }), 0)
210/* End of ANDROID update. */
211#define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
212
213extern int unw_tdep_is_fpreg (int);
214
215#if defined(__cplusplus) || defined(c_plusplus)
216}
217#endif
218
219#endif /* LIBUNWIND_H */
220