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a4f81979 FB |
1 | /* |
2 | * Arm "Angel" semihosting syscalls | |
3 | * | |
4 | * Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
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. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #include <sys/types.h> | |
22 | #include <sys/stat.h> | |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
25 | #include <stdlib.h> | |
26 | #include <stdio.h> | |
27 | #include <time.h> | |
28 | ||
29 | #include "qemu.h" | |
30 | ||
31 | #define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024) | |
32 | ||
33 | #define SYS_OPEN 0x01 | |
34 | #define SYS_CLOSE 0x02 | |
35 | #define SYS_WRITEC 0x03 | |
36 | #define SYS_WRITE0 0x04 | |
37 | #define SYS_WRITE 0x05 | |
38 | #define SYS_READ 0x06 | |
39 | #define SYS_READC 0x07 | |
40 | #define SYS_ISTTY 0x09 | |
41 | #define SYS_SEEK 0x0a | |
42 | #define SYS_FLEN 0x0c | |
43 | #define SYS_TMPNAM 0x0d | |
44 | #define SYS_REMOVE 0x0e | |
45 | #define SYS_RENAME 0x0f | |
46 | #define SYS_CLOCK 0x10 | |
47 | #define SYS_TIME 0x11 | |
48 | #define SYS_SYSTEM 0x12 | |
49 | #define SYS_ERRNO 0x13 | |
50 | #define SYS_GET_CMDLINE 0x15 | |
51 | #define SYS_HEAPINFO 0x16 | |
52 | #define SYS_EXIT 0x18 | |
53 | ||
54 | #ifndef O_BINARY | |
55 | #define O_BINARY 0 | |
56 | #endif | |
57 | ||
58 | int open_modeflags[12] = { | |
59 | O_RDONLY, | |
60 | O_RDONLY | O_BINARY, | |
61 | O_RDWR, | |
62 | O_RDWR | O_BINARY, | |
63 | O_WRONLY | O_CREAT | O_TRUNC, | |
64 | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, | |
65 | O_RDWR | O_CREAT | O_TRUNC, | |
66 | O_RDWR | O_CREAT | O_TRUNC | O_BINARY, | |
67 | O_WRONLY | O_CREAT | O_APPEND, | |
68 | O_WRONLY | O_CREAT | O_APPEND | O_BINARY, | |
69 | O_RDWR | O_CREAT | O_APPEND, | |
70 | O_RDWR | O_CREAT | O_APPEND | O_BINARY | |
71 | }; | |
72 | ||
73 | static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code) | |
74 | { | |
75 | if (code == (uint32_t)-1) | |
76 | ts->swi_errno = errno; | |
77 | return code; | |
78 | } | |
79 | ||
53a5960a | 80 | #define ARG(n) tget32(args + n * 4) |
a4f81979 FB |
81 | uint32_t do_arm_semihosting(CPUState *env) |
82 | { | |
53a5960a | 83 | target_ulong args; |
a4f81979 FB |
84 | char * s; |
85 | int nr; | |
86 | uint32_t ret; | |
87 | TaskState *ts = env->opaque; | |
88 | ||
89 | nr = env->regs[0]; | |
53a5960a | 90 | args = env->regs[1]; |
a4f81979 FB |
91 | switch (nr) { |
92 | case SYS_OPEN: | |
53a5960a | 93 | s = (char *)g2h(ARG(0)); |
a4f81979 FB |
94 | if (ARG(1) >= 12) |
95 | return (uint32_t)-1; | |
96 | if (strcmp(s, ":tt") == 0) { | |
97 | if (ARG(1) < 4) | |
98 | return STDIN_FILENO; | |
99 | else | |
100 | return STDOUT_FILENO; | |
101 | } | |
04d81be8 | 102 | return set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644)); |
a4f81979 FB |
103 | case SYS_CLOSE: |
104 | return set_swi_errno(ts, close(ARG(0))); | |
105 | case SYS_WRITEC: | |
53a5960a PB |
106 | { |
107 | char c = tget8(args); | |
108 | /* Write to debug console. stderr is near enough. */ | |
109 | return write(STDERR_FILENO, &c, 1); | |
110 | } | |
a4f81979 | 111 | case SYS_WRITE0: |
53a5960a PB |
112 | s = lock_user_string(args); |
113 | ret = write(STDERR_FILENO, s, strlen(s)); | |
114 | unlock_user(s, args, 0); | |
115 | return ret; | |
a4f81979 | 116 | case SYS_WRITE: |
53a5960a | 117 | ret = set_swi_errno(ts, write(ARG(0), g2h(ARG(1)), ARG(2))); |
a4f81979 FB |
118 | if (ret == (uint32_t)-1) |
119 | return -1; | |
120 | return ARG(2) - ret; | |
121 | case SYS_READ: | |
53a5960a | 122 | ret = set_swi_errno(ts, read(ARG(0), g2h(ARG(1)), ARG(2))); |
a4f81979 FB |
123 | if (ret == (uint32_t)-1) |
124 | return -1; | |
125 | return ARG(2) - ret; | |
126 | case SYS_READC: | |
127 | /* XXX: Read from debug cosole. Not implemented. */ | |
128 | return 0; | |
129 | case SYS_ISTTY: | |
130 | return isatty(ARG(0)); | |
131 | case SYS_SEEK: | |
d0b3e735 FB |
132 | ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET)); |
133 | if (ret == (uint32_t)-1) | |
134 | return -1; | |
135 | return 0; | |
a4f81979 FB |
136 | case SYS_FLEN: |
137 | { | |
138 | struct stat buf; | |
139 | ret = set_swi_errno(ts, fstat(ARG(0), &buf)); | |
140 | if (ret == (uint32_t)-1) | |
141 | return -1; | |
142 | return buf.st_size; | |
143 | } | |
144 | case SYS_TMPNAM: | |
145 | /* XXX: Not implemented. */ | |
146 | return -1; | |
147 | case SYS_REMOVE: | |
53a5960a | 148 | return set_swi_errno(ts, remove((char *)g2h(ARG(0)))); |
a4f81979 | 149 | case SYS_RENAME: |
53a5960a PB |
150 | return set_swi_errno(ts, rename((char *)g2h(ARG(0)), |
151 | (char *)g2h(ARG(2)))); | |
a4f81979 FB |
152 | case SYS_CLOCK: |
153 | return clock() / (CLOCKS_PER_SEC / 100); | |
154 | case SYS_TIME: | |
155 | return set_swi_errno(ts, time(NULL)); | |
156 | case SYS_SYSTEM: | |
53a5960a | 157 | return set_swi_errno(ts, system((char *)g2h(ARG(0)))); |
a4f81979 FB |
158 | case SYS_ERRNO: |
159 | return ts->swi_errno; | |
160 | case SYS_GET_CMDLINE: | |
161 | /* XXX: Not implemented. */ | |
53a5960a | 162 | s = (char *)g2h(ARG(0)); |
a4f81979 FB |
163 | *s = 0; |
164 | return -1; | |
165 | case SYS_HEAPINFO: | |
166 | { | |
167 | uint32_t *ptr; | |
168 | uint32_t limit; | |
169 | ||
170 | /* Some C llibraries assume the heap immediately follows .bss, so | |
171 | allocate it using sbrk. */ | |
172 | if (!ts->heap_limit) { | |
173 | long ret; | |
174 | ||
53a5960a | 175 | ts->heap_base = do_brk(0); |
a4f81979 FB |
176 | limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE; |
177 | /* Try a big heap, and reduce the size if that fails. */ | |
178 | for (;;) { | |
53a5960a | 179 | ret = do_brk(limit); |
a4f81979 FB |
180 | if (ret != -1) |
181 | break; | |
182 | limit = (ts->heap_base >> 1) + (limit >> 1); | |
183 | } | |
184 | ts->heap_limit = limit; | |
185 | } | |
186 | ||
53a5960a PB |
187 | page_unprotect_range (ARG(0), 32); |
188 | ptr = (uint32_t *)g2h(ARG(0)); | |
a4f81979 FB |
189 | ptr[0] = tswap32(ts->heap_base); |
190 | ptr[1] = tswap32(ts->heap_limit); | |
191 | ptr[2] = tswap32(ts->stack_base); | |
192 | ptr[3] = tswap32(0); /* Stack limit. */ | |
193 | return 0; | |
194 | } | |
195 | case SYS_EXIT: | |
196 | exit(0); | |
197 | default: | |
198 | fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr); | |
199 | cpu_dump_state(env, stderr, fprintf, 0); | |
200 | abort(); | |
201 | } | |
202 | } | |
203 |