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1 | a87295e8 | pbrook | /*
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2 | a87295e8 | pbrook | * m68k/ColdFire Semihosting syscall interface
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3 | a87295e8 | pbrook | *
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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 | a87295e8 | pbrook | * along with this program; if not, write to the Free Software
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18 | a87295e8 | pbrook | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | a87295e8 | pbrook | */
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20 | a87295e8 | pbrook | |
21 | a87295e8 | pbrook | #include <sys/types.h> |
22 | a87295e8 | pbrook | #include <sys/stat.h> |
23 | a87295e8 | pbrook | #include <errno.h> |
24 | a87295e8 | pbrook | #include <fcntl.h> |
25 | a87295e8 | pbrook | #include <unistd.h> |
26 | a87295e8 | pbrook | #include <stdlib.h> |
27 | a87295e8 | pbrook | #include <stdio.h> |
28 | a87295e8 | pbrook | #include <sys/time.h> |
29 | a87295e8 | pbrook | #include <time.h> |
30 | a87295e8 | pbrook | |
31 | a87295e8 | pbrook | #include "cpu.h" |
32 | a87295e8 | pbrook | #if defined(CONFIG_USER_ONLY)
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33 | a87295e8 | pbrook | #include "qemu.h" |
34 | a87295e8 | pbrook | #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) |
35 | a87295e8 | pbrook | #else
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36 | a87295e8 | pbrook | #include "vl.h" |
37 | a87295e8 | pbrook | #include "softmmu-semi.h" |
38 | a87295e8 | pbrook | #endif
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39 | a87295e8 | pbrook | |
40 | a87295e8 | pbrook | #define HOSTED_EXIT 0 |
41 | a87295e8 | pbrook | #define HOSTED_INIT_SIM 1 |
42 | a87295e8 | pbrook | #define HOSTED_OPEN 2 |
43 | a87295e8 | pbrook | #define HOSTED_CLOSE 3 |
44 | a87295e8 | pbrook | #define HOSTED_READ 4 |
45 | a87295e8 | pbrook | #define HOSTED_WRITE 5 |
46 | a87295e8 | pbrook | #define HOSTED_LSEEK 6 |
47 | a87295e8 | pbrook | #define HOSTED_RENAME 7 |
48 | a87295e8 | pbrook | #define HOSTED_UNLINK 8 |
49 | a87295e8 | pbrook | #define HOSTED_STAT 9 |
50 | a87295e8 | pbrook | #define HOSTED_FSTAT 10 |
51 | a87295e8 | pbrook | #define HOSTED_GETTIMEOFDAY 11 |
52 | a87295e8 | pbrook | #define HOSTED_ISATTY 12 |
53 | a87295e8 | pbrook | #define HOSTED_SYSTEM 13 |
54 | a87295e8 | pbrook | |
55 | a87295e8 | pbrook | typedef uint32_t gdb_mode_t;
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56 | a87295e8 | pbrook | typedef uint32_t gdb_time_t;
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57 | a87295e8 | pbrook | |
58 | a87295e8 | pbrook | struct m68k_gdb_stat {
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59 | a87295e8 | pbrook | uint32_t gdb_st_dev; /* device */
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60 | a87295e8 | pbrook | uint32_t gdb_st_ino; /* inode */
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61 | a87295e8 | pbrook | gdb_mode_t gdb_st_mode; /* protection */
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62 | a87295e8 | pbrook | uint32_t gdb_st_nlink; /* number of hard links */
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63 | a87295e8 | pbrook | uint32_t gdb_st_uid; /* user ID of owner */
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64 | a87295e8 | pbrook | uint32_t gdb_st_gid; /* group ID of owner */
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65 | a87295e8 | pbrook | uint32_t gdb_st_rdev; /* device type (if inode device) */
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66 | a87295e8 | pbrook | uint64_t gdb_st_size; /* total size, in bytes */
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67 | a87295e8 | pbrook | uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
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68 | a87295e8 | pbrook | uint64_t gdb_st_blocks; /* number of blocks allocated */
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69 | a87295e8 | pbrook | gdb_time_t gdb_st_atime; /* time of last access */
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70 | a87295e8 | pbrook | gdb_time_t gdb_st_mtime; /* time of last modification */
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71 | a87295e8 | pbrook | gdb_time_t gdb_st_ctime; /* time of last change */
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72 | a87295e8 | pbrook | } __attribute__((packed)); |
73 | a87295e8 | pbrook | |
74 | a87295e8 | pbrook | struct gdb_timeval {
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75 | a87295e8 | pbrook | gdb_time_t tv_sec; /* second */
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76 | a87295e8 | pbrook | uint64_t tv_usec; /* microsecond */
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77 | a87295e8 | pbrook | } __attribute__((packed)); |
78 | a87295e8 | pbrook | |
79 | a87295e8 | pbrook | #define GDB_O_RDONLY 0x0 |
80 | a87295e8 | pbrook | #define GDB_O_WRONLY 0x1 |
81 | a87295e8 | pbrook | #define GDB_O_RDWR 0x2 |
82 | a87295e8 | pbrook | #define GDB_O_APPEND 0x8 |
83 | a87295e8 | pbrook | #define GDB_O_CREAT 0x200 |
84 | a87295e8 | pbrook | #define GDB_O_TRUNC 0x400 |
85 | a87295e8 | pbrook | #define GDB_O_EXCL 0x800 |
86 | a87295e8 | pbrook | |
87 | a87295e8 | pbrook | static int translate_openflags(int flags) |
88 | a87295e8 | pbrook | { |
89 | a87295e8 | pbrook | int hf;
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90 | a87295e8 | pbrook | |
91 | a87295e8 | pbrook | if (flags & GDB_O_WRONLY)
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92 | a87295e8 | pbrook | hf = O_WRONLY; |
93 | a87295e8 | pbrook | else if (flags & GDB_O_RDWR) |
94 | a87295e8 | pbrook | hf = O_RDWR; |
95 | a87295e8 | pbrook | else
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96 | a87295e8 | pbrook | hf = O_RDONLY; |
97 | a87295e8 | pbrook | |
98 | a87295e8 | pbrook | if (flags & GDB_O_APPEND) hf |= O_APPEND;
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99 | a87295e8 | pbrook | if (flags & GDB_O_CREAT) hf |= O_CREAT;
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100 | a87295e8 | pbrook | if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
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101 | a87295e8 | pbrook | if (flags & GDB_O_EXCL) hf |= O_EXCL;
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102 | a87295e8 | pbrook | |
103 | a87295e8 | pbrook | return hf;
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104 | a87295e8 | pbrook | } |
105 | a87295e8 | pbrook | |
106 | a87295e8 | pbrook | static void translate_stat(CPUState *env, target_ulong addr, struct stat *s) |
107 | a87295e8 | pbrook | { |
108 | a87295e8 | pbrook | struct m68k_gdb_stat *p;
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109 | a87295e8 | pbrook | |
110 | a87295e8 | pbrook | p = lock_user(addr, sizeof(struct m68k_gdb_stat), 0); |
111 | a87295e8 | pbrook | p->gdb_st_dev = cpu_to_be32(s->st_dev); |
112 | a87295e8 | pbrook | p->gdb_st_ino = cpu_to_be32(s->st_ino); |
113 | a87295e8 | pbrook | p->gdb_st_mode = cpu_to_be32(s->st_mode); |
114 | a87295e8 | pbrook | p->gdb_st_nlink = cpu_to_be32(s->st_nlink); |
115 | a87295e8 | pbrook | p->gdb_st_uid = cpu_to_be32(s->st_uid); |
116 | a87295e8 | pbrook | p->gdb_st_gid = cpu_to_be32(s->st_gid); |
117 | a87295e8 | pbrook | p->gdb_st_rdev = cpu_to_be32(s->st_rdev); |
118 | a87295e8 | pbrook | p->gdb_st_size = cpu_to_be64(s->st_size); |
119 | a87295e8 | pbrook | p->gdb_st_blksize = cpu_to_be64(s->st_blksize); |
120 | a87295e8 | pbrook | p->gdb_st_blocks = cpu_to_be64(s->st_blocks); |
121 | a87295e8 | pbrook | p->gdb_st_atime = cpu_to_be32(s->st_atime); |
122 | a87295e8 | pbrook | p->gdb_st_mtime = cpu_to_be32(s->st_mtime); |
123 | a87295e8 | pbrook | p->gdb_st_ctime = cpu_to_be32(s->st_ctime); |
124 | a87295e8 | pbrook | unlock_user(p, addr, sizeof(struct m68k_gdb_stat)); |
125 | a87295e8 | pbrook | } |
126 | a87295e8 | pbrook | |
127 | a87295e8 | pbrook | static int m68k_semi_is_fseek; |
128 | a87295e8 | pbrook | |
129 | a87295e8 | pbrook | static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err) |
130 | a87295e8 | pbrook | { |
131 | a87295e8 | pbrook | target_ulong args; |
132 | a87295e8 | pbrook | |
133 | a87295e8 | pbrook | args = env->dregs[1];
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134 | a87295e8 | pbrook | if (m68k_semi_is_fseek) {
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135 | a87295e8 | pbrook | /* FIXME: We've already lost the high bits of the fseek
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136 | a87295e8 | pbrook | return value. */
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137 | a87295e8 | pbrook | tput32(args, 0);
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138 | a87295e8 | pbrook | args += 4;
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139 | a87295e8 | pbrook | m68k_semi_is_fseek = 0;
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140 | a87295e8 | pbrook | } |
141 | a87295e8 | pbrook | tput32(args, ret); |
142 | a87295e8 | pbrook | tput32(args + 4, errno);
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143 | a87295e8 | pbrook | } |
144 | a87295e8 | pbrook | |
145 | a87295e8 | pbrook | #define ARG(x) tget32(args + (x) * 4) |
146 | a87295e8 | pbrook | #define PARG(x) ((unsigned long)ARG(x)) |
147 | a87295e8 | pbrook | void do_m68k_semihosting(CPUM68KState *env, int nr) |
148 | a87295e8 | pbrook | { |
149 | a87295e8 | pbrook | uint32_t args; |
150 | a87295e8 | pbrook | void *p;
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151 | a87295e8 | pbrook | void *q;
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152 | a87295e8 | pbrook | uint32_t len; |
153 | a87295e8 | pbrook | uint32_t result; |
154 | a87295e8 | pbrook | |
155 | a87295e8 | pbrook | args = env->dregs[1];
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156 | a87295e8 | pbrook | switch (nr) {
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157 | a87295e8 | pbrook | case HOSTED_EXIT:
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158 | a87295e8 | pbrook | exit(env->dregs[0]);
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159 | a87295e8 | pbrook | case HOSTED_OPEN:
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160 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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161 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1), |
162 | a87295e8 | pbrook | ARG(2), ARG(3)); |
163 | a87295e8 | pbrook | return;
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164 | a87295e8 | pbrook | } else {
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165 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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166 | a87295e8 | pbrook | result = open(p, translate_openflags(ARG(2)), ARG(3)); |
167 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
168 | a87295e8 | pbrook | } |
169 | a87295e8 | pbrook | break;
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170 | a87295e8 | pbrook | case HOSTED_CLOSE:
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171 | a87295e8 | pbrook | { |
172 | a87295e8 | pbrook | /* Ignore attempts to close stdin/out/err. */
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173 | a87295e8 | pbrook | int fd = ARG(0); |
174 | a87295e8 | pbrook | if (fd > 2) { |
175 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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176 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0)); |
177 | a87295e8 | pbrook | return;
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178 | a87295e8 | pbrook | } else {
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179 | a87295e8 | pbrook | result = close(fd); |
180 | a87295e8 | pbrook | } |
181 | a87295e8 | pbrook | } else {
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182 | a87295e8 | pbrook | result = 0;
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183 | a87295e8 | pbrook | } |
184 | a87295e8 | pbrook | break;
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185 | a87295e8 | pbrook | } |
186 | a87295e8 | pbrook | case HOSTED_READ:
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187 | a87295e8 | pbrook | len = ARG(2);
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188 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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189 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
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190 | a87295e8 | pbrook | ARG(0), ARG(1), len); |
191 | a87295e8 | pbrook | return;
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192 | a87295e8 | pbrook | } else {
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193 | a87295e8 | pbrook | p = lock_user(ARG(1), len, 0); |
194 | a87295e8 | pbrook | result = read(ARG(0), p, len);
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195 | a87295e8 | pbrook | unlock_user(p, ARG(1), len);
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196 | a87295e8 | pbrook | } |
197 | a87295e8 | pbrook | break;
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198 | a87295e8 | pbrook | case HOSTED_WRITE:
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199 | a87295e8 | pbrook | len = ARG(2);
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200 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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201 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
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202 | a87295e8 | pbrook | ARG(0), ARG(1), len); |
203 | a87295e8 | pbrook | return;
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204 | a87295e8 | pbrook | } else {
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205 | a87295e8 | pbrook | p = lock_user(ARG(1), len, 1); |
206 | a87295e8 | pbrook | result = write(ARG(0), p, len);
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207 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
208 | a87295e8 | pbrook | } |
209 | a87295e8 | pbrook | break;
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210 | a87295e8 | pbrook | case HOSTED_LSEEK:
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211 | a87295e8 | pbrook | { |
212 | a87295e8 | pbrook | uint64_t off; |
213 | a87295e8 | pbrook | off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32); |
214 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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215 | a87295e8 | pbrook | m68k_semi_is_fseek = 1;
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216 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
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217 | a87295e8 | pbrook | ARG(0), off, ARG(3)); |
218 | a87295e8 | pbrook | } else {
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219 | a87295e8 | pbrook | off = lseek(ARG(0), off, ARG(3)); |
220 | a87295e8 | pbrook | tput32(args, off >> 32);
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221 | a87295e8 | pbrook | tput32(args + 4, off);
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222 | a87295e8 | pbrook | tput32(args + 8, errno);
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223 | a87295e8 | pbrook | } |
224 | a87295e8 | pbrook | return;
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225 | a87295e8 | pbrook | } |
226 | a87295e8 | pbrook | case HOSTED_RENAME:
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227 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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228 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
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229 | a87295e8 | pbrook | ARG(0), (int)ARG(1), ARG(2), (int)ARG(3)); |
230 | a87295e8 | pbrook | return;
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231 | a87295e8 | pbrook | } else {
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232 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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233 | a87295e8 | pbrook | q = lock_user_string(ARG(2));
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234 | a87295e8 | pbrook | result = rename(p, q); |
235 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
236 | a87295e8 | pbrook | unlock_user(q, ARG(2), 0); |
237 | a87295e8 | pbrook | } |
238 | a87295e8 | pbrook | break;
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239 | a87295e8 | pbrook | case HOSTED_UNLINK:
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240 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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241 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "unlink,%s",
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242 | a87295e8 | pbrook | ARG(0), (int)ARG(1)); |
243 | a87295e8 | pbrook | return;
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244 | a87295e8 | pbrook | } else {
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245 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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246 | a87295e8 | pbrook | result = unlink(p); |
247 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
248 | a87295e8 | pbrook | } |
249 | a87295e8 | pbrook | break;
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250 | a87295e8 | pbrook | case HOSTED_STAT:
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251 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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252 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
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253 | a87295e8 | pbrook | ARG(0), (int)ARG(1), ARG(2)); |
254 | a87295e8 | pbrook | return;
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255 | a87295e8 | pbrook | } else {
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256 | a87295e8 | pbrook | struct stat s;
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257 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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258 | a87295e8 | pbrook | result = stat(p, &s); |
259 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
260 | a87295e8 | pbrook | if (result == 0) { |
261 | a87295e8 | pbrook | translate_stat(env, ARG(2), &s);
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262 | a87295e8 | pbrook | } |
263 | a87295e8 | pbrook | } |
264 | a87295e8 | pbrook | break;
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265 | a87295e8 | pbrook | case HOSTED_FSTAT:
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266 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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267 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
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268 | a87295e8 | pbrook | ARG(0), ARG(1)); |
269 | a87295e8 | pbrook | return;
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270 | a87295e8 | pbrook | } else {
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271 | a87295e8 | pbrook | struct stat s;
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272 | a87295e8 | pbrook | result = fstat(ARG(0), &s);
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273 | a87295e8 | pbrook | if (result == 0) { |
274 | a87295e8 | pbrook | translate_stat(env, ARG(1), &s);
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275 | a87295e8 | pbrook | } |
276 | a87295e8 | pbrook | } |
277 | a87295e8 | pbrook | break;
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278 | a87295e8 | pbrook | case HOSTED_GETTIMEOFDAY:
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279 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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280 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
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281 | a87295e8 | pbrook | ARG(0), ARG(1)); |
282 | a87295e8 | pbrook | return;
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283 | a87295e8 | pbrook | } else {
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284 | a87295e8 | pbrook | struct timeval tv;
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285 | a87295e8 | pbrook | struct gdb_timeval *p;
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286 | a87295e8 | pbrook | result = gettimeofday(&tv, NULL);
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287 | a87295e8 | pbrook | if (result != 0) { |
288 | a87295e8 | pbrook | p = lock_user(ARG(0), sizeof(struct gdb_timeval), 0); |
289 | a87295e8 | pbrook | p->tv_sec = cpu_to_be32(tv.tv_sec); |
290 | a87295e8 | pbrook | p->tv_usec = cpu_to_be64(tv.tv_usec); |
291 | a87295e8 | pbrook | unlock_user(p, ARG(0), sizeof(struct gdb_timeval)); |
292 | a87295e8 | pbrook | } |
293 | a87295e8 | pbrook | } |
294 | a87295e8 | pbrook | break;
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295 | a87295e8 | pbrook | case HOSTED_ISATTY:
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296 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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297 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0)); |
298 | a87295e8 | pbrook | return;
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299 | a87295e8 | pbrook | } else {
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300 | a87295e8 | pbrook | result = isatty(ARG(0));
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301 | a87295e8 | pbrook | } |
302 | a87295e8 | pbrook | break;
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303 | a87295e8 | pbrook | case HOSTED_SYSTEM:
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304 | a87295e8 | pbrook | if (use_gdb_syscalls()) {
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305 | a87295e8 | pbrook | gdb_do_syscall(m68k_semi_cb, "system,%s",
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306 | a87295e8 | pbrook | ARG(0), (int)ARG(1)); |
307 | a87295e8 | pbrook | return;
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308 | a87295e8 | pbrook | } else {
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309 | a87295e8 | pbrook | p = lock_user_string(ARG(0));
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310 | a87295e8 | pbrook | result = system(p); |
311 | a87295e8 | pbrook | unlock_user(p, ARG(0), 0); |
312 | a87295e8 | pbrook | } |
313 | a87295e8 | pbrook | break;
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314 | a87295e8 | pbrook | case HOSTED_INIT_SIM:
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315 | a87295e8 | pbrook | #if defined(CONFIG_USER_ONLY)
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316 | a87295e8 | pbrook | { |
317 | a87295e8 | pbrook | TaskState *ts = env->opaque; |
318 | a87295e8 | pbrook | /* Allocate the heap using sbrk. */
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319 | a87295e8 | pbrook | if (!ts->heap_limit) {
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320 | a87295e8 | pbrook | long ret;
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321 | a87295e8 | pbrook | uint32_t size; |
322 | a87295e8 | pbrook | uint32_t base; |
323 | a87295e8 | pbrook | |
324 | a87295e8 | pbrook | base = do_brk(0);
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325 | a87295e8 | pbrook | size = SEMIHOSTING_HEAP_SIZE; |
326 | a87295e8 | pbrook | /* Try a big heap, and reduce the size if that fails. */
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327 | a87295e8 | pbrook | for (;;) {
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328 | a87295e8 | pbrook | ret = do_brk(base + size); |
329 | a87295e8 | pbrook | if (ret != -1) |
330 | a87295e8 | pbrook | break;
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331 | a87295e8 | pbrook | size >>= 1;
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332 | a87295e8 | pbrook | } |
333 | a87295e8 | pbrook | ts->heap_limit = base + size; |
334 | a87295e8 | pbrook | } |
335 | a87295e8 | pbrook | /* This call may happen before we have writable memory, so return
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336 | a87295e8 | pbrook | values directly in registers. */
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337 | a87295e8 | pbrook | env->dregs[1] = ts->heap_limit;
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338 | a87295e8 | pbrook | env->aregs[7] = ts->stack_base;
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339 | a87295e8 | pbrook | } |
340 | a87295e8 | pbrook | #else
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341 | a87295e8 | pbrook | /* FIXME: This is wrong for boards where RAM does not start at
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342 | a87295e8 | pbrook | address zero. */
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343 | a87295e8 | pbrook | env->dregs[1] = ram_size;
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344 | a87295e8 | pbrook | env->aregs[7] = ram_size;
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345 | a87295e8 | pbrook | #endif
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346 | a87295e8 | pbrook | return;
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347 | a87295e8 | pbrook | default:
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348 | a87295e8 | pbrook | cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
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349 | a87295e8 | pbrook | result = 0;
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350 | a87295e8 | pbrook | } |
351 | a87295e8 | pbrook | tput32(args, result); |
352 | a87295e8 | pbrook | tput32(args + 4, errno);
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353 | a87295e8 | pbrook | } |