2 * Arm "Angel" semihosting syscalls
4 * Copyright (c) 2005, 2007 CodeSourcery.
5 * Written by Paul Brook.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 #include <sys/types.h>
32 #ifdef CONFIG_USER_ONLY
35 #define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
37 #include "qemu-common.h"
43 #define SYS_CLOSE 0x02
44 #define SYS_WRITEC 0x03
45 #define SYS_WRITE0 0x04
46 #define SYS_WRITE 0x05
48 #define SYS_READC 0x07
49 #define SYS_ISTTY 0x09
52 #define SYS_TMPNAM 0x0d
53 #define SYS_REMOVE 0x0e
54 #define SYS_RENAME 0x0f
55 #define SYS_CLOCK 0x10
57 #define SYS_SYSTEM 0x12
58 #define SYS_ERRNO 0x13
59 #define SYS_GET_CMDLINE 0x15
60 #define SYS_HEAPINFO 0x16
67 #define GDB_O_RDONLY 0x000
68 #define GDB_O_WRONLY 0x001
69 #define GDB_O_RDWR 0x002
70 #define GDB_O_APPEND 0x008
71 #define GDB_O_CREAT 0x200
72 #define GDB_O_TRUNC 0x400
73 #define GDB_O_BINARY 0
75 static int gdb_open_modeflags[12] = {
77 GDB_O_RDONLY | GDB_O_BINARY,
79 GDB_O_RDWR | GDB_O_BINARY,
80 GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
81 GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
82 GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
83 GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
84 GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
85 GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY,
86 GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
87 GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY
90 static int open_modeflags[12] = {
95 O_WRONLY | O_CREAT | O_TRUNC,
96 O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
97 O_RDWR | O_CREAT | O_TRUNC,
98 O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
99 O_WRONLY | O_CREAT | O_APPEND,
100 O_WRONLY | O_CREAT | O_APPEND | O_BINARY,
101 O_RDWR | O_CREAT | O_APPEND,
102 O_RDWR | O_CREAT | O_APPEND | O_BINARY
105 #ifdef CONFIG_USER_ONLY
106 static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
108 if (code == (uint32_t)-1)
109 ts->swi_errno = errno;
113 static inline uint32_t set_swi_errno(CPUState *env, uint32_t code)
118 #include "softmmu-semi.h"
121 static target_ulong arm_semi_syscall_len;
123 #if !defined(CONFIG_USER_ONLY)
124 static target_ulong syscall_err;
127 static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
129 #ifdef CONFIG_USER_ONLY
130 TaskState *ts = env->opaque;
133 if (ret == (target_ulong)-1) {
134 #ifdef CONFIG_USER_ONLY
141 /* Fixup syscalls that use nonstardard return conventions. */
142 switch (env->regs[0]) {
145 env->regs[0] = arm_semi_syscall_len - ret;
157 static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err)
159 /* The size is always stored in big-endian order, extract
160 the value. We assume the size always fit in 32 bits. */
162 cpu_memory_rw_debug(env, env->regs[13]-64+32, (uint8_t *)&size, 4, 0);
163 env->regs[0] = be32_to_cpu(size);
164 #ifdef CONFIG_USER_ONLY
165 ((TaskState *)env->opaque)->swi_errno = err;
173 target_ulong __arg; \
174 /* FIXME - handle get_user() failure */ \
175 get_user_ual(__arg, args + (n) * 4); \
178 #define SET_ARG(n, val) put_user_ual(val, args + (n) * 4)
179 uint32_t do_arm_semihosting(CPUState *env)
186 #ifdef CONFIG_USER_ONLY
187 TaskState *ts = env->opaque;
196 if (!(s = lock_user_string(ARG(0))))
197 /* FIXME - should this error code be -TARGET_EFAULT ? */
201 if (strcmp(s, ":tt") == 0) {
205 return STDOUT_FILENO;
207 if (use_gdb_syscalls()) {
208 gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0),
209 (int)ARG(2)+1, gdb_open_modeflags[ARG(1)]);
212 ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644));
214 unlock_user(s, ARG(0), 0);
217 if (use_gdb_syscalls()) {
218 gdb_do_syscall(arm_semi_cb, "close,%x", ARG(0));
221 return set_swi_errno(ts, close(ARG(0)));
227 if (get_user_u8(c, args))
228 /* FIXME - should this error code be -TARGET_EFAULT ? */
230 /* Write to debug console. stderr is near enough. */
231 if (use_gdb_syscalls()) {
232 gdb_do_syscall(arm_semi_cb, "write,2,%x,1", args);
235 return write(STDERR_FILENO, &c, 1);
239 if (!(s = lock_user_string(args)))
240 /* FIXME - should this error code be -TARGET_EFAULT ? */
243 if (use_gdb_syscalls()) {
244 gdb_do_syscall(arm_semi_cb, "write,2,%x,%x\n", args, len);
247 ret = write(STDERR_FILENO, s, len);
249 unlock_user(s, args, 0);
253 if (use_gdb_syscalls()) {
254 arm_semi_syscall_len = len;
255 gdb_do_syscall(arm_semi_cb, "write,%x,%x,%x", ARG(0), ARG(1), len);
258 if (!(s = lock_user(VERIFY_READ, ARG(1), len, 1)))
259 /* FIXME - should this error code be -TARGET_EFAULT ? */
261 ret = set_swi_errno(ts, write(ARG(0), s, len));
262 unlock_user(s, ARG(1), 0);
263 if (ret == (uint32_t)-1)
269 if (use_gdb_syscalls()) {
270 arm_semi_syscall_len = len;
271 gdb_do_syscall(arm_semi_cb, "read,%x,%x,%x", ARG(0), ARG(1), len);
274 if (!(s = lock_user(VERIFY_WRITE, ARG(1), len, 0)))
275 /* FIXME - should this error code be -TARGET_EFAULT ? */
278 ret = set_swi_errno(ts, read(ARG(0), s, len));
279 while (ret == -1 && errno == EINTR);
280 unlock_user(s, ARG(1), len);
281 if (ret == (uint32_t)-1)
286 /* XXX: Read from debug cosole. Not implemented. */
289 if (use_gdb_syscalls()) {
290 gdb_do_syscall(arm_semi_cb, "isatty,%x", ARG(0));
293 return isatty(ARG(0));
296 if (use_gdb_syscalls()) {
297 gdb_do_syscall(arm_semi_cb, "lseek,%x,%x,0", ARG(0), ARG(1));
300 ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
301 if (ret == (uint32_t)-1)
306 if (use_gdb_syscalls()) {
307 gdb_do_syscall(arm_semi_flen_cb, "fstat,%x,%x",
308 ARG(0), env->regs[13]-64);
312 ret = set_swi_errno(ts, fstat(ARG(0), &buf));
313 if (ret == (uint32_t)-1)
318 /* XXX: Not implemented. */
321 if (use_gdb_syscalls()) {
322 gdb_do_syscall(arm_semi_cb, "unlink,%s", ARG(0), (int)ARG(1)+1);
325 if (!(s = lock_user_string(ARG(0))))
326 /* FIXME - should this error code be -TARGET_EFAULT ? */
328 ret = set_swi_errno(ts, remove(s));
329 unlock_user(s, ARG(0), 0);
333 if (use_gdb_syscalls()) {
334 gdb_do_syscall(arm_semi_cb, "rename,%s,%s",
335 ARG(0), (int)ARG(1)+1, ARG(2), (int)ARG(3)+1);
339 s = lock_user_string(ARG(0));
340 s2 = lock_user_string(ARG(2));
342 /* FIXME - should this error code be -TARGET_EFAULT ? */
345 ret = set_swi_errno(ts, rename(s, s2));
347 unlock_user(s2, ARG(2), 0);
349 unlock_user(s, ARG(0), 0);
353 return clock() / (CLOCKS_PER_SEC / 100);
355 return set_swi_errno(ts, time(NULL));
357 if (use_gdb_syscalls()) {
358 gdb_do_syscall(arm_semi_cb, "system,%s", ARG(0), (int)ARG(1)+1);
361 if (!(s = lock_user_string(ARG(0))))
362 /* FIXME - should this error code be -TARGET_EFAULT ? */
364 ret = set_swi_errno(ts, system(s));
365 unlock_user(s, ARG(0), 0);
369 #ifdef CONFIG_USER_ONLY
370 return ts->swi_errno;
374 case SYS_GET_CMDLINE:
375 #ifdef CONFIG_USER_ONLY
376 /* Build a commandline from the original argv. */
378 char **arg = ts->info->host_argv;
380 /* lock the buffer on the ARM side */
381 char *cmdline_buffer = (char*)lock_user(VERIFY_WRITE, ARG(0), len, 0);
384 /* FIXME - should this error code be -TARGET_EFAULT ? */
388 while (*arg && len > 2) {
389 int n = strlen(*arg);
391 if (s != cmdline_buffer) {
402 /* Null terminate the string. */
404 len = s - cmdline_buffer;
406 /* Unlock the buffer on the ARM side. */
407 unlock_user(cmdline_buffer, ARG(0), len);
409 /* Adjust the commandline length argument. */
412 /* Return success if commandline fit into buffer. */
413 return *arg ? -1 : 0;
423 #ifdef CONFIG_USER_ONLY
424 /* Some C libraries assume the heap immediately follows .bss, so
425 allocate it using sbrk. */
426 if (!ts->heap_limit) {
429 ts->heap_base = do_brk(0);
430 limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
431 /* Try a big heap, and reduce the size if that fails. */
436 limit = (ts->heap_base >> 1) + (limit >> 1);
438 ts->heap_limit = limit;
441 if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
442 /* FIXME - should this error code be -TARGET_EFAULT ? */
444 ptr[0] = tswap32(ts->heap_base);
445 ptr[1] = tswap32(ts->heap_limit);
446 ptr[2] = tswap32(ts->stack_base);
447 ptr[3] = tswap32(0); /* Stack limit. */
448 unlock_user(ptr, ARG(0), 16);
451 if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
452 /* FIXME - should this error code be -TARGET_EFAULT ? */
454 /* TODO: Make this use the limit of the loaded application. */
455 ptr[0] = tswap32(limit / 2);
456 ptr[1] = tswap32(limit);
457 ptr[2] = tswap32(limit); /* Stack base */
458 ptr[3] = tswap32(0); /* Stack limit. */
459 unlock_user(ptr, ARG(0), 16);
466 fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
467 cpu_dump_state(env, stderr, fprintf, 0);