endif
ifeq ($(TARGET_BASE_ARCH), m68k)
VL_OBJS+= an5206.o mcf5206.o ptimer.o
+VL_OBJS+= m68k-semi.o
endif
ifdef CONFIG_GDBSTUB
VL_OBJS+=gdbstub.o
return code;
}
-static uint32_t softmmu_tget32(CPUState *env, uint32_t addr)
-{
- uint32_t val;
-
- cpu_memory_rw_debug(env, addr, (uint8_t *)&val, 4, 0);
- return tswap32(val);
-}
-static uint32_t softmmu_tget8(CPUState *env, uint32_t addr)
-{
- uint8_t val;
-
- cpu_memory_rw_debug(env, addr, &val, 1, 0);
- return val;
-}
-#define tget32(p) softmmu_tget32(env, p)
-#define tget8(p) softmmu_tget8(env, p)
-
-static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len,
- int copy)
-{
- char *p;
- /* TODO: Make this something that isn't fixed size. */
- p = malloc(len);
- if (copy)
- cpu_memory_rw_debug(env, addr, p, len, 0);
- return p;
-}
-#define lock_user(p, len, copy) softmmu_lock_user(env, p, len, copy)
-static char *softmmu_lock_user_string(CPUState *env, uint32_t addr)
-{
- char *p;
- char *s;
- uint8_t c;
- /* TODO: Make this something that isn't fixed size. */
- s = p = malloc(1024);
- do {
- cpu_memory_rw_debug(env, addr, &c, 1, 0);
- addr++;
- *(p++) = c;
- } while (c);
- return s;
-}
-#define lock_user_string(p) softmmu_lock_user_string(env, p)
-static void softmmu_unlock_user(CPUState *env, void *p, target_ulong addr,
- target_ulong len)
-{
- if (len)
- cpu_memory_rw_debug(env, addr, p, len, 1);
- free(p);
-}
-#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
+#include "softmmu-semi.h"
#endif
static target_ulong arm_semi_syscall_len;
/* Send a gdb syscall request.
This accepts limited printf-style format specifiers, specifically:
- %x - target_ulong argument printed in hex.
- %s - string pointer (target_ulong) and length (int) pair. */
+ %x - target_ulong argument printed in hex.
+ %lx - 64-bit argument printed in hex.
+ %s - string pointer (target_ulong) and length (int) pair. */
void gdb_do_syscall(gdb_syscall_complete_cb cb, char *fmt, ...)
{
va_list va;
char buf[256];
char *p;
target_ulong addr;
+ uint64_t i64;
GDBState *s;
s = gdb_syscall_state;
addr = va_arg(va, target_ulong);
p += sprintf(p, TARGET_FMT_lx, addr);
break;
+ case 'l':
+ if (*(fmt++) != 'x')
+ goto bad_format;
+ i64 = va_arg(va, uint64_t);
+ p += sprintf(p, "%" PRIx64, i64);
+ break;
case 's':
addr = va_arg(va, target_ulong);
p += sprintf(p, TARGET_FMT_lx "/%x", addr, va_arg(va, int));
break;
default:
+ bad_format:
fprintf(stderr, "gdbstub: Bad syscall format string '%s'\n",
fmt - 1);
break;
+++ /dev/null
-/*
- * m68k/ColdFire Semihosting ssycall interface
- *
- * Copyright (c) 2005 CodeSourcery, LLC. Written by Paul Brook.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <sys/time.h>
-#include <time.h>
-
-#include "qemu.h"
-
-#define HOSTED_EXIT 0
-#define HOSTED_PUTCHAR 1 /* Obsolete */
-#define HOSTED_OPEN 2
-#define HOSTED_CLOSE 3
-#define HOSTED_READ 4
-#define HOSTED_WRITE 5
-#define HOSTED_LSEEK 6
-#define HOSTED_RENAME 7
-#define HOSTED_UNLINK 8
-#define HOSTED_STAT 9
-#define HOSTED_FSTAT 10
-#define HOSTED_GETTIMEOFDAY 11
-#define HOSTED_ISATTY 12
-#define HOSTED_SYSTEM 13
-
-typedef uint32_t gdb_mode_t;
-typedef uint32_t gdb_time_t;
-
-struct m68k_gdb_stat {
- uint32_t gdb_st_dev; /* device */
- uint32_t gdb_st_ino; /* inode */
- gdb_mode_t gdb_st_mode; /* protection */
- uint32_t gdb_st_nlink; /* number of hard links */
- uint32_t gdb_st_uid; /* user ID of owner */
- uint32_t gdb_st_gid; /* group ID of owner */
- uint32_t gdb_st_rdev; /* device type (if inode device) */
- uint64_t gdb_st_size; /* total size, in bytes */
- uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
- uint64_t gdb_st_blocks; /* number of blocks allocated */
- gdb_time_t gdb_st_atime; /* time of last access */
- gdb_time_t gdb_st_mtime; /* time of last modification */
- gdb_time_t gdb_st_ctime; /* time of last change */
-};
-
-struct gdb_timeval {
- gdb_time_t tv_sec; /* second */
- uint64_t tv_usec; /* microsecond */
-};
-
-#define GDB_O_RDONLY 0x0
-#define GDB_O_WRONLY 0x1
-#define GDB_O_RDWR 0x2
-#define GDB_O_APPEND 0x8
-#define GDB_O_CREAT 0x200
-#define GDB_O_TRUNC 0x400
-#define GDB_O_EXCL 0x800
-
-static int translate_openflags(int flags)
-{
- int hf;
-
- if (flags & GDB_O_WRONLY)
- hf = O_WRONLY;
- else if (flags & GDB_O_RDWR)
- hf = O_RDWR;
- else
- hf = O_RDONLY;
-
- if (flags & GDB_O_APPEND) hf |= O_APPEND;
- if (flags & GDB_O_CREAT) hf |= O_CREAT;
- if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
- if (flags & GDB_O_EXCL) hf |= O_EXCL;
-
- return hf;
-}
-
-static void translate_stat(struct m68k_gdb_stat *p, struct stat *s)
-{
- p->gdb_st_dev = tswap16(s->st_dev);
- p->gdb_st_ino = tswap16(s->st_ino);
- p->gdb_st_mode = tswap32(s->st_mode);
- p->gdb_st_nlink = tswap16(s->st_nlink);
- p->gdb_st_uid = tswap16(s->st_uid);
- p->gdb_st_gid = tswap16(s->st_gid);
- p->gdb_st_rdev = tswap16(s->st_rdev);
- p->gdb_st_size = tswap32(s->st_size);
- p->gdb_st_atime = tswap32(s->st_atime);
- p->gdb_st_mtime = tswap32(s->st_mtime);
- p->gdb_st_ctime = tswap32(s->st_ctime);
- p->gdb_st_blksize = tswap32(s->st_blksize);
- p->gdb_st_blocks = tswap32(s->st_blocks);
-}
-
-static inline uint32_t check_err(CPUM68KState *env, uint32_t code)
-{
- if (code == (uint32_t)-1) {
- env->sr |= CCF_C;
- } else {
- env->sr &= ~CCF_C;
- env->dregs[0] = code;
- }
- return code;
-}
-
-#define ARG(x) tswap32(args[x])
-void do_m68k_semihosting(CPUM68KState *env, int nr)
-{
- uint32_t *args;
-
- args = (uint32_t *)env->dregs[1];
- switch (nr) {
- case HOSTED_EXIT:
- exit(env->dregs[0]);
- case HOSTED_OPEN:
- /* Assume name is NULL terminated. */
- check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)),
- ARG(3)));
- break;
- case HOSTED_CLOSE:
- {
- /* Ignore attempts to close stdin/out/err. */
- int fd = ARG(0);
- if (fd > 2)
- check_err(env, close(fd));
- else
- check_err(env, 0);
- break;
- }
- case HOSTED_READ:
- check_err(env, read(ARG(0), (void *)ARG(1), ARG(2)));
- break;
- case HOSTED_WRITE:
- check_err(env, write(ARG(0), (void *)ARG(1), ARG(2)));
- break;
- case HOSTED_LSEEK:
- {
- uint64_t off;
- off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
- check_err(env, lseek(ARG(0), off, ARG(3)));
- }
- break;
- case HOSTED_RENAME:
- /* Assume names are NULL terminated. */
- check_err(env, rename((char *)ARG(0), (char *)ARG(2)));
- break;
- case HOSTED_UNLINK:
- /* Assume name is NULL terminated. */
- check_err(env, unlink((char *)ARG(0)));
- break;
- case HOSTED_STAT:
- /* Assume name is NULL terminated. */
- {
- struct stat s;
- int rc;
- rc = check_err(env, stat((char *)ARG(0), &s));
- if (rc == 0) {
- translate_stat((struct m68k_gdb_stat *)ARG(2), &s);
- }
- }
- break;
- case HOSTED_FSTAT:
- {
- struct stat s;
- int rc;
- rc = check_err(env, fstat(ARG(0), &s));
- if (rc == 0) {
- translate_stat((struct m68k_gdb_stat *)ARG(1), &s);
- }
- }
- break;
- case HOSTED_GETTIMEOFDAY:
- {
- struct timeval tv;
- struct gdb_timeval *p;
- int rc;
- rc = check_err(env, gettimeofday(&tv, NULL));
- if (rc != 0) {
- p = (struct gdb_timeval *)ARG(0);
- p->tv_sec = tswap32(tv.tv_sec);
- p->tv_usec = tswap64(tv.tv_usec);
- }
- }
- break;
- case HOSTED_ISATTY:
- check_err(env, isatty(ARG(0)));
- break;
- case HOSTED_SYSTEM:
- /* Assume name is NULL terminated. */
- check_err(env, system((char *)ARG(0)));
- break;
- default:
- cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
- }
-}
}
}
break;
- case EXCP_HALTED:
+ case EXCP_HALT_INSN:
/* Semihosing syscall. */
- env->pc += 2;
+ env->pc += 4;
do_m68k_semihosting(env, env->dregs[0]);
break;
case EXCP_LINEA:
for(i = 0; i < 16; i++) {
env->regs[i] = regs->uregs[i];
}
- ts->stack_base = info->start_stack;
- ts->heap_base = info->brk;
- /* This will be filled in on the first SYS_HEAPINFO call. */
- ts->heap_limit = 0;
}
#elif defined(TARGET_SPARC)
{
#error unsupported target CPU
#endif
+#if defined(TARGET_ARM) || defined(TARGET_M68K)
+ ts->stack_base = info->start_stack;
+ ts->heap_base = info->brk;
+ /* This will be filled in on the first SYS_HEAPINFO call. */
+ ts->heap_limit = 0;
+#endif
+
if (gdbstub_port) {
gdbserver_start (gdbstub_port);
gdb_handlesig(env, 0);
#ifdef TARGET_ARM
/* FPA state */
FPA11 fpa;
- /* Extra fields for semihosted binaries. */
- uint32_t stack_base;
- uint32_t heap_base;
- uint32_t heap_limit;
int swi_errno;
#endif
#if defined(TARGET_I386) && !defined(TARGET_X86_64)
#endif
#ifdef TARGET_M68K
int sim_syscalls;
+#endif
+#if defined(TARGET_ARM) || defined(TARGET_M68K)
+ /* Extra fields for semihosted binaries. */
+ uint32_t stack_base;
+ uint32_t heap_base;
+ uint32_t heap_limit;
#endif
int used; /* non zero if used */
struct image_info *info;
--- /dev/null
+/*
+ * m68k/ColdFire Semihosting syscall interface
+ *
+ * Copyright (c) 2005-2007 CodeSourcery.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include "cpu.h"
+#if defined(CONFIG_USER_ONLY)
+#include "qemu.h"
+#define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
+#else
+#include "vl.h"
+#include "softmmu-semi.h"
+#endif
+
+#define HOSTED_EXIT 0
+#define HOSTED_INIT_SIM 1
+#define HOSTED_OPEN 2
+#define HOSTED_CLOSE 3
+#define HOSTED_READ 4
+#define HOSTED_WRITE 5
+#define HOSTED_LSEEK 6
+#define HOSTED_RENAME 7
+#define HOSTED_UNLINK 8
+#define HOSTED_STAT 9
+#define HOSTED_FSTAT 10
+#define HOSTED_GETTIMEOFDAY 11
+#define HOSTED_ISATTY 12
+#define HOSTED_SYSTEM 13
+
+typedef uint32_t gdb_mode_t;
+typedef uint32_t gdb_time_t;
+
+struct m68k_gdb_stat {
+ uint32_t gdb_st_dev; /* device */
+ uint32_t gdb_st_ino; /* inode */
+ gdb_mode_t gdb_st_mode; /* protection */
+ uint32_t gdb_st_nlink; /* number of hard links */
+ uint32_t gdb_st_uid; /* user ID of owner */
+ uint32_t gdb_st_gid; /* group ID of owner */
+ uint32_t gdb_st_rdev; /* device type (if inode device) */
+ uint64_t gdb_st_size; /* total size, in bytes */
+ uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
+ uint64_t gdb_st_blocks; /* number of blocks allocated */
+ gdb_time_t gdb_st_atime; /* time of last access */
+ gdb_time_t gdb_st_mtime; /* time of last modification */
+ gdb_time_t gdb_st_ctime; /* time of last change */
+} __attribute__((packed));
+
+struct gdb_timeval {
+ gdb_time_t tv_sec; /* second */
+ uint64_t tv_usec; /* microsecond */
+} __attribute__((packed));
+
+#define GDB_O_RDONLY 0x0
+#define GDB_O_WRONLY 0x1
+#define GDB_O_RDWR 0x2
+#define GDB_O_APPEND 0x8
+#define GDB_O_CREAT 0x200
+#define GDB_O_TRUNC 0x400
+#define GDB_O_EXCL 0x800
+
+static int translate_openflags(int flags)
+{
+ int hf;
+
+ if (flags & GDB_O_WRONLY)
+ hf = O_WRONLY;
+ else if (flags & GDB_O_RDWR)
+ hf = O_RDWR;
+ else
+ hf = O_RDONLY;
+
+ if (flags & GDB_O_APPEND) hf |= O_APPEND;
+ if (flags & GDB_O_CREAT) hf |= O_CREAT;
+ if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
+ if (flags & GDB_O_EXCL) hf |= O_EXCL;
+
+ return hf;
+}
+
+static void translate_stat(CPUState *env, target_ulong addr, struct stat *s)
+{
+ struct m68k_gdb_stat *p;
+
+ p = lock_user(addr, sizeof(struct m68k_gdb_stat), 0);
+ p->gdb_st_dev = cpu_to_be32(s->st_dev);
+ p->gdb_st_ino = cpu_to_be32(s->st_ino);
+ p->gdb_st_mode = cpu_to_be32(s->st_mode);
+ p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
+ p->gdb_st_uid = cpu_to_be32(s->st_uid);
+ p->gdb_st_gid = cpu_to_be32(s->st_gid);
+ p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
+ p->gdb_st_size = cpu_to_be64(s->st_size);
+ p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
+ p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
+ p->gdb_st_atime = cpu_to_be32(s->st_atime);
+ p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
+ p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
+ unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
+}
+
+static int m68k_semi_is_fseek;
+
+static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
+{
+ target_ulong args;
+
+ args = env->dregs[1];
+ if (m68k_semi_is_fseek) {
+ /* FIXME: We've already lost the high bits of the fseek
+ return value. */
+ tput32(args, 0);
+ args += 4;
+ m68k_semi_is_fseek = 0;
+ }
+ tput32(args, ret);
+ tput32(args + 4, errno);
+}
+
+#define ARG(x) tget32(args + (x) * 4)
+#define PARG(x) ((unsigned long)ARG(x))
+void do_m68k_semihosting(CPUM68KState *env, int nr)
+{
+ uint32_t args;
+ void *p;
+ void *q;
+ uint32_t len;
+ uint32_t result;
+
+ args = env->dregs[1];
+ switch (nr) {
+ case HOSTED_EXIT:
+ exit(env->dregs[0]);
+ case HOSTED_OPEN:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1),
+ ARG(2), ARG(3));
+ return;
+ } else {
+ p = lock_user_string(ARG(0));
+ result = open(p, translate_openflags(ARG(2)), ARG(3));
+ unlock_user(p, ARG(0), 0);
+ }
+ break;
+ case HOSTED_CLOSE:
+ {
+ /* Ignore attempts to close stdin/out/err. */
+ int fd = ARG(0);
+ if (fd > 2) {
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0));
+ return;
+ } else {
+ result = close(fd);
+ }
+ } else {
+ result = 0;
+ }
+ break;
+ }
+ case HOSTED_READ:
+ len = ARG(2);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
+ ARG(0), ARG(1), len);
+ return;
+ } else {
+ p = lock_user(ARG(1), len, 0);
+ result = read(ARG(0), p, len);
+ unlock_user(p, ARG(1), len);
+ }
+ break;
+ case HOSTED_WRITE:
+ len = ARG(2);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
+ ARG(0), ARG(1), len);
+ return;
+ } else {
+ p = lock_user(ARG(1), len, 1);
+ result = write(ARG(0), p, len);
+ unlock_user(p, ARG(0), 0);
+ }
+ break;
+ case HOSTED_LSEEK:
+ {
+ uint64_t off;
+ off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
+ if (use_gdb_syscalls()) {
+ m68k_semi_is_fseek = 1;
+ gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
+ ARG(0), off, ARG(3));
+ } else {
+ off = lseek(ARG(0), off, ARG(3));
+ tput32(args, off >> 32);
+ tput32(args + 4, off);
+ tput32(args + 8, errno);
+ }
+ return;
+ }
+ case HOSTED_RENAME:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
+ ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
+ return;
+ } else {
+ p = lock_user_string(ARG(0));
+ q = lock_user_string(ARG(2));
+ result = rename(p, q);
+ unlock_user(p, ARG(0), 0);
+ unlock_user(q, ARG(2), 0);
+ }
+ break;
+ case HOSTED_UNLINK:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "unlink,%s",
+ ARG(0), (int)ARG(1));
+ return;
+ } else {
+ p = lock_user_string(ARG(0));
+ result = unlink(p);
+ unlock_user(p, ARG(0), 0);
+ }
+ break;
+ case HOSTED_STAT:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
+ ARG(0), (int)ARG(1), ARG(2));
+ return;
+ } else {
+ struct stat s;
+ p = lock_user_string(ARG(0));
+ result = stat(p, &s);
+ unlock_user(p, ARG(0), 0);
+ if (result == 0) {
+ translate_stat(env, ARG(2), &s);
+ }
+ }
+ break;
+ case HOSTED_FSTAT:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
+ ARG(0), ARG(1));
+ return;
+ } else {
+ struct stat s;
+ result = fstat(ARG(0), &s);
+ if (result == 0) {
+ translate_stat(env, ARG(1), &s);
+ }
+ }
+ break;
+ case HOSTED_GETTIMEOFDAY:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
+ ARG(0), ARG(1));
+ return;
+ } else {
+ struct timeval tv;
+ struct gdb_timeval *p;
+ result = gettimeofday(&tv, NULL);
+ if (result != 0) {
+ p = lock_user(ARG(0), sizeof(struct gdb_timeval), 0);
+ p->tv_sec = cpu_to_be32(tv.tv_sec);
+ p->tv_usec = cpu_to_be64(tv.tv_usec);
+ unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
+ }
+ }
+ break;
+ case HOSTED_ISATTY:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0));
+ return;
+ } else {
+ result = isatty(ARG(0));
+ }
+ break;
+ case HOSTED_SYSTEM:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "system,%s",
+ ARG(0), (int)ARG(1));
+ return;
+ } else {
+ p = lock_user_string(ARG(0));
+ result = system(p);
+ unlock_user(p, ARG(0), 0);
+ }
+ break;
+ case HOSTED_INIT_SIM:
+#if defined(CONFIG_USER_ONLY)
+ {
+ TaskState *ts = env->opaque;
+ /* Allocate the heap using sbrk. */
+ if (!ts->heap_limit) {
+ long ret;
+ uint32_t size;
+ uint32_t base;
+
+ base = do_brk(0);
+ size = SEMIHOSTING_HEAP_SIZE;
+ /* Try a big heap, and reduce the size if that fails. */
+ for (;;) {
+ ret = do_brk(base + size);
+ if (ret != -1)
+ break;
+ size >>= 1;
+ }
+ ts->heap_limit = base + size;
+ }
+ /* This call may happen before we have writable memory, so return
+ values directly in registers. */
+ env->dregs[1] = ts->heap_limit;
+ env->aregs[7] = ts->stack_base;
+ }
+#else
+ /* FIXME: This is wrong for boards where RAM does not start at
+ address zero. */
+ env->dregs[1] = ram_size;
+ env->aregs[7] = ram_size;
+#endif
+ return;
+ default:
+ cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
+ result = 0;
+ }
+ tput32(args, result);
+ tput32(args + 4, errno);
+}
Start right away with a saved state (@code{loadvm} in monitor)
@item -semihosting
-Enable "Angel" semihosting interface (ARM target machines only).
+Enable semihosting syscall emulation (ARM and M68K target machines only).
+
+On ARM this implements the "Angel" interface.
+On M68K this implements the "ColdFire GDB" interface used by libgloss.
+
Note that this allows guest direct access to the host filesystem,
so should only be used with trusted guest OS.
@end table
#define EXCP_ICE 13
#define EXCP_RTE 0x100
+#define EXCP_HALT_INSN 0x101
typedef struct CPUM68KState {
uint32_t dregs[8];
#define M68K_FPCR_PREC (1 << 6)
+void do_m68k_semihosting(CPUM68KState *env, int nr);
+
#ifdef CONFIG_USER_ONLY
/* Linux uses 8k pages. */
#define TARGET_PAGE_BITS 13
FORCE_RET();
}
+/* Halt is special because it may be a semihosting call. */
OP(halt)
+{
+ RAISE_EXCEPTION(EXCP_HALT_INSN);
+ FORCE_RET();
+}
+
+OP(stop)
{
env->halted = 1;
RAISE_EXCEPTION(EXCP_HLT);
#else
+extern int semihosting_enabled;
+
#define MMUSUFFIX _mmu
#define GETPC() (__builtin_return_address(0))
/* Return from an exception. */
do_rte();
return;
+ case EXCP_HALT_INSN:
+ if (semihosting_enabled
+ && (env->sr & SR_S) != 0
+ && (env->pc & 3) == 0
+ && lduw_code(env->pc - 4) == 0x4e71
+ && ldl_code(env->pc) == 0x4e7bf000) {
+ env->pc += 4;
+ do_m68k_semihosting(env, env->dregs[0]);
+ return;
+ }
+ env->halted = 1;
+ env->exception_index = EXCP_HLT;
+ cpu_loop_exit();
+ return;
}
if (env->exception_index >= EXCP_TRAP0
&& env->exception_index <= EXCP_TRAP15) {
DISAS_INSN(halt)
{
- gen_flush_cc_op(s);
gen_jmp(s, gen_im32(s->pc));
gen_op_halt();
}
s->pc += 2;
gen_set_sr_im(s, ext, 0);
- disas_halt(s, insn);
+ gen_jmp(s, gen_im32(s->pc));
+ gen_op_stop();
}
DISAS_INSN(rte)
{ "show-cursor", 0, QEMU_OPTION_show_cursor },
{ "daemonize", 0, QEMU_OPTION_daemonize },
{ "option-rom", HAS_ARG, QEMU_OPTION_option_rom },
-#if defined(TARGET_ARM)
+#if defined(TARGET_ARM) || defined(TARGET_M68K)
{ "semihosting", 0, QEMU_OPTION_semihosting },
#endif
{ "name", HAS_ARG, QEMU_OPTION_name },
projects / sdk / emulator / qemu.git / commitdiff