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1 | a87295e8 | pbrook | /*
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2 | a87295e8 | pbrook | * m68k/ColdFire Semihosting syscall interface
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3 | 5fafdf24 | ths | *
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4 | a87295e8 | pbrook | * Copyright (c) 2005-2007 CodeSourcery.
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5 | a87295e8 | pbrook | *
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6 | a87295e8 | pbrook | * This program is free software; you can redistribute it and/or modify
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7 | a87295e8 | pbrook | * it under the terms of the GNU General Public License as published by
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8 | a87295e8 | pbrook | * the Free Software Foundation; either version 2 of the License, or
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9 | a87295e8 | pbrook | * (at your option) any later version.
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10 | a87295e8 | pbrook | *
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11 | a87295e8 | pbrook | * This program is distributed in the hope that it will be useful,
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12 | a87295e8 | pbrook | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a87295e8 | pbrook | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | a87295e8 | pbrook | * GNU General Public License for more details.
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15 | a87295e8 | pbrook | *
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16 | a87295e8 | pbrook | * You should have received a copy of the GNU General Public License
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17 | 8167ee88 | Blue Swirl | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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18 | a87295e8 | pbrook | */
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19 | a87295e8 | pbrook | |
20 | a87295e8 | pbrook | #include <sys/types.h> |
21 | a87295e8 | pbrook | #include <sys/stat.h> |
22 | a87295e8 | pbrook | #include <errno.h> |
23 | a87295e8 | pbrook | #include <fcntl.h> |
24 | a87295e8 | pbrook | #include <unistd.h> |
25 | a87295e8 | pbrook | #include <stdlib.h> |
26 | a87295e8 | pbrook | #include <stdio.h> |
27 | a87295e8 | pbrook | #include <sys/time.h> |
28 | a87295e8 | pbrook | #include <time.h> |
29 | a87295e8 | pbrook | |
30 | a87295e8 | pbrook | #include "cpu.h" |
31 | a87295e8 | pbrook | #if defined(CONFIG_USER_ONLY)
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32 | a87295e8 | pbrook | #include "qemu.h" |
33 | a87295e8 | pbrook | #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) |
34 | a87295e8 | pbrook | #else
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35 | 87ecb68b | pbrook | #include "qemu-common.h" |
36 | 87ecb68b | pbrook | #include "sysemu.h" |
37 | 87ecb68b | pbrook | #include "gdbstub.h" |
38 | a87295e8 | pbrook | #include "softmmu-semi.h" |
39 | a87295e8 | pbrook | #endif
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40 | a87295e8 | pbrook | |
41 | a87295e8 | pbrook | #define HOSTED_EXIT 0 |
42 | a87295e8 | pbrook | #define HOSTED_INIT_SIM 1 |
43 | a87295e8 | pbrook | #define HOSTED_OPEN 2 |
44 | a87295e8 | pbrook | #define HOSTED_CLOSE 3 |
45 | a87295e8 | pbrook | #define HOSTED_READ 4 |
46 | a87295e8 | pbrook | #define HOSTED_WRITE 5 |
47 | a87295e8 | pbrook | #define HOSTED_LSEEK 6 |
48 | a87295e8 | pbrook | #define HOSTED_RENAME 7 |
49 | a87295e8 | pbrook | #define HOSTED_UNLINK 8 |
50 | a87295e8 | pbrook | #define HOSTED_STAT 9 |
51 | a87295e8 | pbrook | #define HOSTED_FSTAT 10 |
52 | a87295e8 | pbrook | #define HOSTED_GETTIMEOFDAY 11 |
53 | a87295e8 | pbrook | #define HOSTED_ISATTY 12 |
54 | a87295e8 | pbrook | #define HOSTED_SYSTEM 13 |
55 | a87295e8 | pbrook | |
56 | c227f099 | Anthony Liguori | typedef uint32_t gdb_mode_t;
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57 | c227f099 | Anthony Liguori | typedef uint32_t gdb_time_t;
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58 | a87295e8 | pbrook | |
59 | a87295e8 | pbrook | struct m68k_gdb_stat {
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60 | a87295e8 | pbrook | uint32_t gdb_st_dev; /* device */
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61 | a87295e8 | pbrook | uint32_t gdb_st_ino; /* inode */
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62 | c227f099 | Anthony Liguori | gdb_mode_t gdb_st_mode; /* protection */
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63 | a87295e8 | pbrook | uint32_t gdb_st_nlink; /* number of hard links */
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64 | a87295e8 | pbrook | uint32_t gdb_st_uid; /* user ID of owner */
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65 | a87295e8 | pbrook | uint32_t gdb_st_gid; /* group ID of owner */
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66 | a87295e8 | pbrook | uint32_t gdb_st_rdev; /* device type (if inode device) */
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67 | a87295e8 | pbrook | uint64_t gdb_st_size; /* total size, in bytes */
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68 | a87295e8 | pbrook | uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
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69 | a87295e8 | pbrook | uint64_t gdb_st_blocks; /* number of blocks allocated */
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70 | c227f099 | Anthony Liguori | gdb_time_t gdb_st_atime; /* time of last access */
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71 | c227f099 | Anthony Liguori | gdb_time_t gdb_st_mtime; /* time of last modification */
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72 | c227f099 | Anthony Liguori | gdb_time_t gdb_st_ctime; /* time of last change */
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73 | a87295e8 | pbrook | } __attribute__((packed)); |
74 | a87295e8 | pbrook | |
75 | a87295e8 | pbrook | struct gdb_timeval {
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76 | c227f099 | Anthony Liguori | gdb_time_t tv_sec; /* second */
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77 | a87295e8 | pbrook | uint64_t tv_usec; /* microsecond */
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78 | a87295e8 | pbrook | } __attribute__((packed)); |
79 | a87295e8 | pbrook | |
80 | a87295e8 | pbrook | #define GDB_O_RDONLY 0x0 |
81 | a87295e8 | pbrook | #define GDB_O_WRONLY 0x1 |
82 | a87295e8 | pbrook | #define GDB_O_RDWR 0x2 |
83 | a87295e8 | pbrook | #define GDB_O_APPEND 0x8 |
84 | a87295e8 | pbrook | #define GDB_O_CREAT 0x200 |
85 | a87295e8 | pbrook | #define GDB_O_TRUNC 0x400 |
86 | a87295e8 | pbrook | #define GDB_O_EXCL 0x800 |
87 | a87295e8 | pbrook | |
88 | a87295e8 | pbrook | static int translate_openflags(int flags) |
89 | a87295e8 | pbrook | { |
90 | a87295e8 | pbrook | int hf;
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91 | a87295e8 | pbrook | |
92 | a87295e8 | pbrook | if (flags & GDB_O_WRONLY)
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93 | a87295e8 | pbrook | hf = O_WRONLY; |
94 | a87295e8 | pbrook | else if (flags & GDB_O_RDWR) |
95 | a87295e8 | pbrook | hf = O_RDWR; |
96 | a87295e8 | pbrook | else
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97 | a87295e8 | pbrook | hf = O_RDONLY; |
98 | a87295e8 | pbrook | |
99 | a87295e8 | pbrook | if (flags & GDB_O_APPEND) hf |= O_APPEND;
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100 | a87295e8 | pbrook | if (flags & GDB_O_CREAT) hf |= O_CREAT;
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101 | a87295e8 | pbrook | if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
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102 | a87295e8 | pbrook | if (flags & GDB_O_EXCL) hf |= O_EXCL;
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103 | a87295e8 | pbrook | |
104 | a87295e8 | pbrook | return hf;
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105 | a87295e8 | pbrook | } |
106 | a87295e8 | pbrook | |
107 | a87295e8 | pbrook | static void translate_stat(CPUState *env, target_ulong addr, struct stat *s) |
108 | a87295e8 | pbrook | { |
109 | a87295e8 | pbrook | struct m68k_gdb_stat *p;
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110 | a87295e8 | pbrook | |
111 | 579a97f7 | bellard | if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0))) |
112 | 579a97f7 | bellard | /* FIXME - should this return an error code? */
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113 | 579a97f7 | bellard | return;
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114 | a87295e8 | pbrook | p->gdb_st_dev = cpu_to_be32(s->st_dev); |
115 | a87295e8 | pbrook | p->gdb_st_ino = cpu_to_be32(s->st_ino); |
116 | a87295e8 | pbrook | p->gdb_st_mode = cpu_to_be32(s->st_mode); |
117 | a87295e8 | pbrook | p->gdb_st_nlink = cpu_to_be32(s->st_nlink); |
118 | a87295e8 | pbrook | p->gdb_st_uid = cpu_to_be32(s->st_uid); |
119 | a87295e8 | pbrook | p->gdb_st_gid = cpu_to_be32(s->st_gid); |
120 | a87295e8 | pbrook | p->gdb_st_rdev = cpu_to_be32(s->st_rdev); |
121 | a87295e8 | pbrook | p->gdb_st_size = cpu_to_be64(s->st_size); |
122 | 29b3a662 | pbrook | #ifdef _WIN32
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123 | 29b3a662 | pbrook | /* Windows stat is missing some fields. */
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124 | 29b3a662 | pbrook | p->gdb_st_blksize = 0;
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125 | 29b3a662 | pbrook | p->gdb_st_blocks = 0;
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126 | 29b3a662 | pbrook | #else
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127 | a87295e8 | pbrook | p->gdb_st_blksize = cpu_to_be64(s->st_blksize); |
128 | a87295e8 | pbrook | p->gdb_st_blocks = cpu_to_be64(s->st_blocks); |
129 | 29b3a662 | pbrook | #endif
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130 | a87295e8 | pbrook | p->gdb_st_atime = cpu_to_be32(s->st_atime); |
131 | a87295e8 | pbrook | p->gdb_st_mtime = cpu_to_be32(s->st_mtime); |
132 | a87295e8 | pbrook | p->gdb_st_ctime = cpu_to_be32(s->st_ctime); |
133 | a87295e8 | pbrook | unlock_user(p, addr, sizeof(struct m68k_gdb_stat)); |
134 | a87295e8 | pbrook | } |
135 | a87295e8 | pbrook | |
136 | a87295e8 | pbrook | static int m68k_semi_is_fseek; |
137 | a87295e8 | pbrook | |
138 | a87295e8 | pbrook | static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err) |
139 | a87295e8 | pbrook | { |
140 | a87295e8 | pbrook | target_ulong args; |
141 | a87295e8 | pbrook | |
142 | a87295e8 | pbrook | args = env->dregs[1];
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143 | a87295e8 | pbrook | if (m68k_semi_is_fseek) {
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144 | a87295e8 | pbrook | /* FIXME: We've already lost the high bits of the fseek
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145 | a87295e8 | pbrook | return value. */
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146 | 2f619698 | bellard | /* FIXME - handle put_user() failure */
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147 | 2f619698 | bellard | put_user_u32(0, args);
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148 | a87295e8 | pbrook | args += 4;
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149 | a87295e8 | pbrook | m68k_semi_is_fseek = 0;
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150 | a87295e8 | pbrook | } |
151 | 2f619698 | bellard | /* FIXME - handle put_user() failure */
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152 | 2f619698 | bellard | put_user_u32(ret, args); |
153 | 2f619698 | bellard | put_user_u32(errno, args + 4);
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154 | a87295e8 | pbrook | } |
155 | a87295e8 | pbrook | |
156 | 2f619698 | bellard | #define ARG(n) \
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157 | 2f619698 | bellard | ({ \ |
158 | 2f619698 | bellard | target_ulong __arg; \ |
159 | 2f619698 | bellard | /* FIXME - handle get_user() failure */ \
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160 | 2f619698 | bellard | get_user_ual(__arg, args + (n) * 4); \
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161 | 2f619698 | bellard | __arg; \ |
162 | 2f619698 | bellard | }) |
163 | a87295e8 | pbrook | #define PARG(x) ((unsigned long)ARG(x)) |
164 | a87295e8 | pbrook | void do_m68k_semihosting(CPUM68KState *env, int nr) |
165 | a87295e8 | pbrook | { |
166 | a87295e8 | pbrook | uint32_t args; |
167 | a87295e8 | pbrook | void *p;
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168 | a87295e8 | pbrook | void *q;
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169 | a87295e8 | pbrook | uint32_t len; |
170 | a87295e8 | pbrook | uint32_t result; |
171 | a87295e8 | pbrook | |
172 | a87295e8 | pbrook | args = env->dregs[1];
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173 | a87295e8 | pbrook | switch (nr) {
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174 | a87295e8 | pbrook | case HOSTED_EXIT:
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175 | a87295e8 | pbrook | exit(env->dregs[0]);
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176 | a87295e8 | pbrook | case HOSTED_OPEN:
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177 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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178 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1), |
179 | a87295e8 | pbrook | ARG(2), ARG(3)); |
180 | a87295e8 | pbrook | return;
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181 | a87295e8 | pbrook | } else {
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182 | 579a97f7 | bellard | if (!(p = lock_user_string(ARG(0)))) { |
183 | 579a97f7 | bellard | /* FIXME - check error code? */
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184 | 579a97f7 | bellard | result = -1;
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185 | 579a97f7 | bellard | } else {
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186 | 579a97f7 | bellard | result = open(p, translate_openflags(ARG(2)), ARG(3)); |
187 | 579a97f7 | bellard | unlock_user(p, ARG(0), 0); |
188 | 579a97f7 | bellard | } |
189 | a87295e8 | pbrook | } |
190 | a87295e8 | pbrook | break;
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191 | a87295e8 | pbrook | case HOSTED_CLOSE:
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192 | a87295e8 | pbrook | { |
193 | a87295e8 | pbrook | /* Ignore attempts to close stdin/out/err. */
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194 | a87295e8 | pbrook | int fd = ARG(0); |
195 | a87295e8 | pbrook | if (fd > 2) { |
196 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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197 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0)); |
198 | a87295e8 | pbrook | return;
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199 | a87295e8 | pbrook | } else {
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200 | a87295e8 | pbrook | result = close(fd); |
201 | a87295e8 | pbrook | } |
202 | a87295e8 | pbrook | } else {
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203 | a87295e8 | pbrook | result = 0;
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204 | a87295e8 | pbrook | } |
205 | a87295e8 | pbrook | break;
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206 | a87295e8 | pbrook | } |
207 | a87295e8 | pbrook | case HOSTED_READ:
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208 | a87295e8 | pbrook | len = ARG(2);
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209 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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210 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
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211 | a87295e8 | pbrook | ARG(0), ARG(1), len); |
212 | a87295e8 | pbrook | return;
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213 | a87295e8 | pbrook | } else {
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214 | 579a97f7 | bellard | if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) { |
215 | 579a97f7 | bellard | /* FIXME - check error code? */
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216 | 579a97f7 | bellard | result = -1;
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217 | 579a97f7 | bellard | } else {
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218 | 579a97f7 | bellard | result = read(ARG(0), p, len);
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219 | 579a97f7 | bellard | unlock_user(p, ARG(1), len);
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220 | 579a97f7 | bellard | } |
221 | a87295e8 | pbrook | } |
222 | a87295e8 | pbrook | break;
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223 | a87295e8 | pbrook | case HOSTED_WRITE:
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224 | a87295e8 | pbrook | len = ARG(2);
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225 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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226 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
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227 | a87295e8 | pbrook | ARG(0), ARG(1), len); |
228 | a87295e8 | pbrook | return;
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229 | a87295e8 | pbrook | } else {
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230 | 579a97f7 | bellard | if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) { |
231 | 579a97f7 | bellard | /* FIXME - check error code? */
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232 | 579a97f7 | bellard | result = -1;
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233 | 579a97f7 | bellard | } else {
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234 | 579a97f7 | bellard | result = write(ARG(0), p, len);
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235 | 579a97f7 | bellard | unlock_user(p, ARG(0), 0); |
236 | 579a97f7 | bellard | } |
237 | a87295e8 | pbrook | } |
238 | a87295e8 | pbrook | break;
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239 | a87295e8 | pbrook | case HOSTED_LSEEK:
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240 | a87295e8 | pbrook | { |
241 | a87295e8 | pbrook | uint64_t off; |
242 | a87295e8 | pbrook | off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32); |
243 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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244 | a87295e8 | pbrook | m68k_semi_is_fseek = 1;
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245 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
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246 | a87295e8 | pbrook | ARG(0), off, ARG(3)); |
247 | a87295e8 | pbrook | } else {
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248 | a87295e8 | pbrook | off = lseek(ARG(0), off, ARG(3)); |
249 | 2f619698 | bellard | /* FIXME - handle put_user() failure */
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250 | 2f619698 | bellard | put_user_u32(off >> 32, args);
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251 | 2f619698 | bellard | put_user_u32(off, args + 4);
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252 | 2f619698 | bellard | put_user_u32(errno, args + 8);
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253 | a87295e8 | pbrook | } |
254 | a87295e8 | pbrook | return;
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255 | a87295e8 | pbrook | } |
256 | a87295e8 | pbrook | case HOSTED_RENAME:
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257 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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258 | 5fafdf24 | ths | gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
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259 | a87295e8 | pbrook | ARG(0), (int)ARG(1), ARG(2), (int)ARG(3)); |
260 | a87295e8 | pbrook | return;
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261 | a87295e8 | pbrook | } else {
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262 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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263 | a87295e8 | pbrook | q = lock_user_string(ARG(2));
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264 | 579a97f7 | bellard | if (!p || !q) {
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265 | 579a97f7 | bellard | /* FIXME - check error code? */
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266 | 579a97f7 | bellard | result = -1;
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267 | 579a97f7 | bellard | } else {
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268 | 579a97f7 | bellard | result = rename(p, q); |
269 | 579a97f7 | bellard | } |
270 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
271 | a87295e8 | pbrook | unlock_user(q, ARG(2), 0); |
272 | a87295e8 | pbrook | } |
273 | a87295e8 | pbrook | break;
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274 | a87295e8 | pbrook | case HOSTED_UNLINK:
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275 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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276 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "unlink,%s",
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277 | a87295e8 | pbrook | ARG(0), (int)ARG(1)); |
278 | a87295e8 | pbrook | return;
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279 | a87295e8 | pbrook | } else {
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280 | 579a97f7 | bellard | if (!(p = lock_user_string(ARG(0)))) { |
281 | 579a97f7 | bellard | /* FIXME - check error code? */
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282 | 579a97f7 | bellard | result = -1;
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283 | 579a97f7 | bellard | } else {
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284 | 579a97f7 | bellard | result = unlink(p); |
285 | 579a97f7 | bellard | unlock_user(p, ARG(0), 0); |
286 | 579a97f7 | bellard | } |
287 | a87295e8 | pbrook | } |
288 | a87295e8 | pbrook | break;
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289 | a87295e8 | pbrook | case HOSTED_STAT:
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290 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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291 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
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292 | a87295e8 | pbrook | ARG(0), (int)ARG(1), ARG(2)); |
293 | a87295e8 | pbrook | return;
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294 | a87295e8 | pbrook | } else {
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295 | a87295e8 | pbrook | struct stat s;
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296 | 579a97f7 | bellard | if (!(p = lock_user_string(ARG(0)))) { |
297 | 579a97f7 | bellard | /* FIXME - check error code? */
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298 | 579a97f7 | bellard | result = -1;
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299 | 579a97f7 | bellard | } else {
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300 | 579a97f7 | bellard | result = stat(p, &s); |
301 | 579a97f7 | bellard | unlock_user(p, ARG(0), 0); |
302 | 579a97f7 | bellard | } |
303 | a87295e8 | pbrook | if (result == 0) { |
304 | a87295e8 | pbrook | translate_stat(env, ARG(2), &s);
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305 | a87295e8 | pbrook | } |
306 | a87295e8 | pbrook | } |
307 | a87295e8 | pbrook | break;
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308 | a87295e8 | pbrook | case HOSTED_FSTAT:
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309 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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310 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
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311 | a87295e8 | pbrook | ARG(0), ARG(1)); |
312 | a87295e8 | pbrook | return;
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313 | a87295e8 | pbrook | } else {
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314 | a87295e8 | pbrook | struct stat s;
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315 | a87295e8 | pbrook | result = fstat(ARG(0), &s);
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316 | a87295e8 | pbrook | if (result == 0) { |
317 | a87295e8 | pbrook | translate_stat(env, ARG(1), &s);
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318 | a87295e8 | pbrook | } |
319 | a87295e8 | pbrook | } |
320 | a87295e8 | pbrook | break;
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321 | a87295e8 | pbrook | case HOSTED_GETTIMEOFDAY:
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322 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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323 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
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324 | a87295e8 | pbrook | ARG(0), ARG(1)); |
325 | a87295e8 | pbrook | return;
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326 | a87295e8 | pbrook | } else {
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327 | 29b3a662 | pbrook | qemu_timeval tv; |
328 | a87295e8 | pbrook | struct gdb_timeval *p;
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329 | 29b3a662 | pbrook | result = qemu_gettimeofday(&tv); |
330 | a87295e8 | pbrook | if (result != 0) { |
331 | 579a97f7 | bellard | if (!(p = lock_user(VERIFY_WRITE,
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332 | 579a97f7 | bellard | ARG(0), sizeof(struct gdb_timeval), 0))) { |
333 | 579a97f7 | bellard | /* FIXME - check error code? */
|
334 | 579a97f7 | bellard | result = -1;
|
335 | 579a97f7 | bellard | } else {
|
336 | 579a97f7 | bellard | p->tv_sec = cpu_to_be32(tv.tv_sec); |
337 | 579a97f7 | bellard | p->tv_usec = cpu_to_be64(tv.tv_usec); |
338 | 579a97f7 | bellard | unlock_user(p, ARG(0), sizeof(struct gdb_timeval)); |
339 | 579a97f7 | bellard | } |
340 | a87295e8 | pbrook | } |
341 | a87295e8 | pbrook | } |
342 | a87295e8 | pbrook | break;
|
343 | a87295e8 | pbrook | case HOSTED_ISATTY:
|
344 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
|
345 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0)); |
346 | a87295e8 | pbrook | return;
|
347 | a87295e8 | pbrook | } else {
|
348 | a87295e8 | pbrook | result = isatty(ARG(0));
|
349 | a87295e8 | pbrook | } |
350 | a87295e8 | pbrook | break;
|
351 | a87295e8 | pbrook | case HOSTED_SYSTEM:
|
352 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
|
353 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "system,%s",
|
354 | a87295e8 | pbrook | ARG(0), (int)ARG(1)); |
355 | a87295e8 | pbrook | return;
|
356 | a87295e8 | pbrook | } else {
|
357 | 579a97f7 | bellard | if (!(p = lock_user_string(ARG(0)))) { |
358 | 579a97f7 | bellard | /* FIXME - check error code? */
|
359 | 579a97f7 | bellard | result = -1;
|
360 | 579a97f7 | bellard | } else {
|
361 | 579a97f7 | bellard | result = system(p); |
362 | 579a97f7 | bellard | unlock_user(p, ARG(0), 0); |
363 | 579a97f7 | bellard | } |
364 | a87295e8 | pbrook | } |
365 | a87295e8 | pbrook | break;
|
366 | a87295e8 | pbrook | case HOSTED_INIT_SIM:
|
367 | a87295e8 | pbrook | #if defined(CONFIG_USER_ONLY)
|
368 | a87295e8 | pbrook | { |
369 | a87295e8 | pbrook | TaskState *ts = env->opaque; |
370 | a87295e8 | pbrook | /* Allocate the heap using sbrk. */
|
371 | a87295e8 | pbrook | if (!ts->heap_limit) {
|
372 | a87295e8 | pbrook | long ret;
|
373 | a87295e8 | pbrook | uint32_t size; |
374 | a87295e8 | pbrook | uint32_t base; |
375 | a87295e8 | pbrook | |
376 | a87295e8 | pbrook | base = do_brk(0);
|
377 | a87295e8 | pbrook | size = SEMIHOSTING_HEAP_SIZE; |
378 | a87295e8 | pbrook | /* Try a big heap, and reduce the size if that fails. */
|
379 | a87295e8 | pbrook | for (;;) {
|
380 | a87295e8 | pbrook | ret = do_brk(base + size); |
381 | a87295e8 | pbrook | if (ret != -1) |
382 | a87295e8 | pbrook | break;
|
383 | a87295e8 | pbrook | size >>= 1;
|
384 | a87295e8 | pbrook | } |
385 | a87295e8 | pbrook | ts->heap_limit = base + size; |
386 | a87295e8 | pbrook | } |
387 | a87295e8 | pbrook | /* This call may happen before we have writable memory, so return
|
388 | a87295e8 | pbrook | values directly in registers. */
|
389 | a87295e8 | pbrook | env->dregs[1] = ts->heap_limit;
|
390 | a87295e8 | pbrook | env->aregs[7] = ts->stack_base;
|
391 | a87295e8 | pbrook | } |
392 | a87295e8 | pbrook | #else
|
393 | a87295e8 | pbrook | /* FIXME: This is wrong for boards where RAM does not start at
|
394 | a87295e8 | pbrook | address zero. */
|
395 | a87295e8 | pbrook | env->dregs[1] = ram_size;
|
396 | a87295e8 | pbrook | env->aregs[7] = ram_size;
|
397 | a87295e8 | pbrook | #endif
|
398 | a87295e8 | pbrook | return;
|
399 | a87295e8 | pbrook | default:
|
400 | a87295e8 | pbrook | cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
|
401 | a87295e8 | pbrook | result = 0;
|
402 | a87295e8 | pbrook | } |
403 | 2f619698 | bellard | /* FIXME - handle put_user() failure */
|
404 | 2f619698 | bellard | put_user_u32(result, args); |
405 | 2f619698 | bellard | put_user_u32(errno, args + 4);
|
406 | a87295e8 | pbrook | } |