target-ppc: improve correctness of the fsel instruction
[qemu/qemu-JZ.git] / tests / qruncom.c
blob6bc0b2b2d4a16ca36e6b59ec7a7ceea0487a88af
1 /*
2 * Example of use of user mode libqemu: launch a basic .com DOS
3 * executable
4 */
5 #include <stdlib.h>
6 #include <stdio.h>
7 #include <string.h>
8 #include <inttypes.h>
9 #include <unistd.h>
10 #include <fcntl.h>
11 #include <sys/mman.h>
12 #include <signal.h>
13 #include <malloc.h>
15 #include "cpu.h"
17 //#define SIGTEST
19 void cpu_outb(CPUState *env, int addr, int val)
21 fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
24 void cpu_outw(CPUState *env, int addr, int val)
26 fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
29 void cpu_outl(CPUState *env, int addr, int val)
31 fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
34 int cpu_inb(CPUState *env, int addr)
36 fprintf(stderr, "inb: port=0x%04x\n", addr);
37 return 0;
40 int cpu_inw(CPUState *env, int addr)
42 fprintf(stderr, "inw: port=0x%04x\n", addr);
43 return 0;
46 int cpu_inl(CPUState *env, int addr)
48 fprintf(stderr, "inl: port=0x%04x\n", addr);
49 return 0;
52 int cpu_get_pic_interrupt(CPUState *env)
54 return -1;
57 uint64_t cpu_get_tsc(CPUState *env)
59 return 0;
62 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
63 unsigned long addr, unsigned int sel)
65 unsigned int e1, e2;
66 e1 = (addr & 0xffff) | (sel << 16);
67 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
68 stl((uint8_t *)ptr, e1);
69 stl((uint8_t *)ptr + 4, e2);
72 uint64_t idt_table[256];
74 /* only dpl matters as we do only user space emulation */
75 static void set_idt(int n, unsigned int dpl)
77 set_gate(idt_table + n, 0, dpl, 0, 0);
80 void qemu_free(void *ptr)
82 free(ptr);
85 void *qemu_malloc(size_t size)
87 return malloc(size);
90 void *qemu_mallocz(size_t size)
92 void *ptr;
93 ptr = qemu_malloc(size);
94 if (!ptr)
95 return NULL;
96 memset(ptr, 0, size);
97 return ptr;
100 void *qemu_vmalloc(size_t size)
102 return memalign(4096, size);
105 void qemu_vfree(void *ptr)
107 free(ptr);
110 void qemu_printf(const char *fmt, ...)
112 va_list ap;
113 va_start(ap, fmt);
114 vprintf(fmt, ap);
115 va_end(ap);
118 /* XXX: this is a bug in helper2.c */
119 int errno;
121 /**********************************************/
123 #define COM_BASE_ADDR 0x10100
125 void usage(void)
127 printf("qruncom version 0.1 (c) 2003 Fabrice Bellard\n"
128 "usage: qruncom file.com\n"
129 "user mode libqemu demo: run simple .com DOS executables\n");
130 exit(1);
133 static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
135 return (uint8_t *)((seg << 4) + (reg & 0xffff));
138 static inline void pushw(CPUState *env, int val)
140 env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) | ((env->regs[R_ESP] - 2) & 0xffff);
141 *(uint16_t *)seg_to_linear(env->segs[R_SS].selector, env->regs[R_ESP]) = val;
144 static void host_segv_handler(int host_signum, siginfo_t *info,
145 void *puc)
147 if (cpu_signal_handler(host_signum, info, puc)) {
148 return;
150 abort();
153 int main(int argc, char **argv)
155 uint8_t *vm86_mem;
156 const char *filename;
157 int fd, ret, seg;
158 CPUState *env;
160 if (argc != 2)
161 usage();
162 filename = argv[1];
164 vm86_mem = mmap((void *)0x00000000, 0x110000,
165 PROT_WRITE | PROT_READ | PROT_EXEC,
166 MAP_FIXED | MAP_ANON | MAP_PRIVATE, -1, 0);
167 if (vm86_mem == MAP_FAILED) {
168 perror("mmap");
169 exit(1);
172 /* load the MSDOS .com executable */
173 fd = open(filename, O_RDONLY);
174 if (fd < 0) {
175 perror(filename);
176 exit(1);
178 ret = read(fd, vm86_mem + COM_BASE_ADDR, 65536 - 256);
179 if (ret < 0) {
180 perror("read");
181 exit(1);
183 close(fd);
185 /* install exception handler for CPU emulator */
187 struct sigaction act;
189 sigfillset(&act.sa_mask);
190 act.sa_flags = SA_SIGINFO;
191 // act.sa_flags |= SA_ONSTACK;
193 act.sa_sigaction = host_segv_handler;
194 sigaction(SIGSEGV, &act, NULL);
195 sigaction(SIGBUS, &act, NULL);
198 // cpu_set_log(CPU_LOG_TB_IN_ASM | CPU_LOG_TB_OUT_ASM | CPU_LOG_EXEC);
200 env = cpu_init("qemu32");
202 /* set user mode state (XXX: should be done automatically by
203 cpu_init ?) */
204 env->user_mode_only = 1;
206 cpu_x86_set_cpl(env, 3);
208 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
209 /* NOTE: hflags duplicates some of the virtual CPU state */
210 env->hflags |= HF_PE_MASK | VM_MASK;
212 /* flags setup : we activate the IRQs by default as in user
213 mode. We also activate the VM86 flag to run DOS code */
214 env->eflags |= IF_MASK | VM_MASK;
216 /* init basic registers */
217 env->eip = 0x100;
218 env->regs[R_ESP] = 0xfffe;
219 seg = (COM_BASE_ADDR - 0x100) >> 4;
221 cpu_x86_load_seg_cache(env, R_CS, seg,
222 (seg << 4), 0xffff, 0);
223 cpu_x86_load_seg_cache(env, R_SS, seg,
224 (seg << 4), 0xffff, 0);
225 cpu_x86_load_seg_cache(env, R_DS, seg,
226 (seg << 4), 0xffff, 0);
227 cpu_x86_load_seg_cache(env, R_ES, seg,
228 (seg << 4), 0xffff, 0);
229 cpu_x86_load_seg_cache(env, R_FS, seg,
230 (seg << 4), 0xffff, 0);
231 cpu_x86_load_seg_cache(env, R_GS, seg,
232 (seg << 4), 0xffff, 0);
234 /* exception support */
235 env->idt.base = (unsigned long)idt_table;
236 env->idt.limit = sizeof(idt_table) - 1;
237 set_idt(0, 0);
238 set_idt(1, 0);
239 set_idt(2, 0);
240 set_idt(3, 3);
241 set_idt(4, 3);
242 set_idt(5, 3);
243 set_idt(6, 0);
244 set_idt(7, 0);
245 set_idt(8, 0);
246 set_idt(9, 0);
247 set_idt(10, 0);
248 set_idt(11, 0);
249 set_idt(12, 0);
250 set_idt(13, 0);
251 set_idt(14, 0);
252 set_idt(15, 0);
253 set_idt(16, 0);
254 set_idt(17, 0);
255 set_idt(18, 0);
256 set_idt(19, 0);
258 /* put return code */
259 *seg_to_linear(env->segs[R_CS].selector, 0) = 0xb4; /* mov ah, $0 */
260 *seg_to_linear(env->segs[R_CS].selector, 1) = 0x00;
261 *seg_to_linear(env->segs[R_CS].selector, 2) = 0xcd; /* int $0x21 */
262 *seg_to_linear(env->segs[R_CS].selector, 3) = 0x21;
263 pushw(env, 0x0000);
265 /* the value of these registers seem to be assumed by pi_10.com */
266 env->regs[R_ESI] = 0x100;
267 env->regs[R_ECX] = 0xff;
268 env->regs[R_EBP] = 0x0900;
269 env->regs[R_EDI] = 0xfffe;
271 /* inform the emulator of the mmaped memory */
272 page_set_flags(0x00000000, 0x110000,
273 PAGE_WRITE | PAGE_READ | PAGE_EXEC | PAGE_VALID);
275 for(;;) {
276 ret = cpu_x86_exec(env);
277 switch(ret) {
278 case EXCP0D_GPF:
280 int int_num, ah;
281 int_num = *(uint8_t *)(env->segs[R_CS].base + env->eip + 1);
282 if (int_num != 0x21)
283 goto unknown_int;
284 ah = (env->regs[R_EAX] >> 8) & 0xff;
285 switch(ah) {
286 case 0x00: /* exit */
287 exit(0);
288 case 0x02: /* write char */
290 uint8_t c = env->regs[R_EDX];
291 write(1, &c, 1);
293 break;
294 case 0x09: /* write string */
296 uint8_t c;
297 for(;;) {
298 c = *seg_to_linear(env->segs[R_DS].selector, env->regs[R_EAX]);
299 if (c == '$')
300 break;
301 write(1, &c, 1);
303 env->regs[R_EAX] = (env->regs[R_EAX] & ~0xff) | '$';
305 break;
306 default:
307 unknown_int:
308 fprintf(stderr, "unsupported int 0x%02x\n", int_num);
309 cpu_dump_state(env, stderr, fprintf, 0);
310 // exit(1);
312 env->eip += 2;
314 break;
315 default:
316 fprintf(stderr, "unhandled cpu_exec return code (0x%x)\n", ret);
317 cpu_dump_state(env, stderr, fprintf, 0);
318 exit(1);