/*
* Arm "Angel" semihosting syscalls
- *
+ *
* Copyright (c) 2005, 2007 CodeSourcery.
* Written by Paul Brook.
*
*
* 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.
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ * MA 02110-1301, USA.
*/
#include <sys/types.h>
#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
#else
-#include "vl.h"
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "gdbstub.h"
#endif
#define SYS_OPEN 0x01
#define O_BINARY 0
#endif
-int open_modeflags[12] = {
+#define GDB_O_RDONLY 0x000
+#define GDB_O_WRONLY 0x001
+#define GDB_O_RDWR 0x002
+#define GDB_O_APPEND 0x008
+#define GDB_O_CREAT 0x200
+#define GDB_O_TRUNC 0x400
+#define GDB_O_BINARY 0
+
+static int gdb_open_modeflags[12] = {
+ GDB_O_RDONLY,
+ GDB_O_RDONLY | GDB_O_BINARY,
+ GDB_O_RDWR,
+ GDB_O_RDWR | GDB_O_BINARY,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_TRUNC | GDB_O_BINARY,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND,
+ GDB_O_WRONLY | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND,
+ GDB_O_RDWR | GDB_O_CREAT | GDB_O_APPEND | GDB_O_BINARY
+};
+
+static int open_modeflags[12] = {
O_RDONLY,
O_RDONLY | O_BINARY,
O_RDWR,
return code;
}
-static uint32_t softmmu_tget32(CPUState *env, uint32_t addr)
-{
- uint32_t val;
+#include "softmmu-semi.h"
+#endif
- 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;
+static target_ulong arm_semi_syscall_len;
- 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)
+#if !defined(CONFIG_USER_ONLY)
+static target_ulong syscall_err;
+#endif
-static void *softmmu_lock_user(CPUState *env, uint32_t addr, uint32_t len,
- int copy)
+static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
{
- 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;
+#ifdef CONFIG_USER_ONLY
+ TaskState *ts = env->opaque;
+#endif
+
+ if (ret == (target_ulong)-1) {
+#ifdef CONFIG_USER_ONLY
+ ts->swi_errno = err;
+#else
+ syscall_err = err;
+#endif
+ env->regs[0] = ret;
+ } else {
+ /* Fixup syscalls that use nonstardard return conventions. */
+ switch (env->regs[0]) {
+ case SYS_WRITE:
+ case SYS_READ:
+ env->regs[0] = arm_semi_syscall_len - ret;
+ break;
+ case SYS_SEEK:
+ env->regs[0] = 0;
+ break;
+ default:
+ env->regs[0] = ret;
+ break;
+ }
+ }
}
-#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)
+
+static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err)
{
- 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)
+ /* The size is always stored in big-endian order, extract
+ the value. We assume the size always fit in 32 bits. */
+ uint32_t size;
+ cpu_memory_rw_debug(env, env->regs[13]-64+32, (uint8_t *)&size, 4, 0);
+ env->regs[0] = be32_to_cpu(size);
+#ifdef CONFIG_USER_ONLY
+ ((TaskState *)env->opaque)->swi_errno = err;
+#else
+ syscall_err = err;
#endif
+}
-#define ARG(n) tget32(args + (n) * 4)
-#define SET_ARG(n, val) tput32(args + (n) * 4,val)
+#define ARG(n) \
+({ \
+ target_ulong __arg; \
+ /* FIXME - handle get_user() failure */ \
+ get_user_ual(__arg, args + (n) * 4); \
+ __arg; \
+})
+#define SET_ARG(n, val) put_user_ual(val, args + (n) * 4)
uint32_t do_arm_semihosting(CPUState *env)
{
target_ulong args;
args = env->regs[1];
switch (nr) {
case SYS_OPEN:
- s = lock_user_string(ARG(0));
+ if (!(s = lock_user_string(ARG(0))))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
if (ARG(1) >= 12)
- return (uint32_t)-1;
+ return (uint32_t)-1;
if (strcmp(s, ":tt") == 0) {
if (ARG(1) < 4)
return STDIN_FILENO;
else
return STDOUT_FILENO;
}
- ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644));
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0),
+ (int)ARG(2)+1, gdb_open_modeflags[ARG(1)]);
+ return env->regs[0];
+ } else {
+ ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644));
+ }
unlock_user(s, ARG(0), 0);
return ret;
case SYS_CLOSE:
- return set_swi_errno(ts, close(ARG(0)));
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "close,%x", ARG(0));
+ return env->regs[0];
+ } else {
+ return set_swi_errno(ts, close(ARG(0)));
+ }
case SYS_WRITEC:
{
- char c = tget8(args);
+ char c;
+
+ if (get_user_u8(c, args))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
/* Write to debug console. stderr is near enough. */
- return write(STDERR_FILENO, &c, 1);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "write,2,%x,1", args);
+ return env->regs[0];
+ } else {
+ return write(STDERR_FILENO, &c, 1);
+ }
}
case SYS_WRITE0:
- s = lock_user_string(args);
- ret = write(STDERR_FILENO, s, strlen(s));
+ if (!(s = lock_user_string(args)))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
+ len = strlen(s);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "write,2,%x,%x\n", args, len);
+ ret = env->regs[0];
+ } else {
+ ret = write(STDERR_FILENO, s, len);
+ }
unlock_user(s, args, 0);
return ret;
case SYS_WRITE:
len = ARG(2);
- s = lock_user(ARG(1), len, 1);
- ret = set_swi_errno(ts, write(ARG(0), s, len));
- unlock_user(s, ARG(1), 0);
- if (ret == (uint32_t)-1)
- return -1;
- return ARG(2) - ret;
+ if (use_gdb_syscalls()) {
+ arm_semi_syscall_len = len;
+ gdb_do_syscall(arm_semi_cb, "write,%x,%x,%x", ARG(0), ARG(1), len);
+ return env->regs[0];
+ } else {
+ if (!(s = lock_user(VERIFY_READ, ARG(1), len, 1)))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
+ ret = set_swi_errno(ts, write(ARG(0), s, len));
+ unlock_user(s, ARG(1), 0);
+ if (ret == (uint32_t)-1)
+ return -1;
+ return len - ret;
+ }
case SYS_READ:
len = ARG(2);
- s = lock_user(ARG(1), len, 0);
- do
- ret = set_swi_errno(ts, read(ARG(0), s, len));
- while (ret == -1 && errno == EINTR);
- unlock_user(s, ARG(1), len);
- if (ret == (uint32_t)-1)
- return -1;
- return ARG(2) - ret;
+ if (use_gdb_syscalls()) {
+ arm_semi_syscall_len = len;
+ gdb_do_syscall(arm_semi_cb, "read,%x,%x,%x", ARG(0), ARG(1), len);
+ return env->regs[0];
+ } else {
+ if (!(s = lock_user(VERIFY_WRITE, ARG(1), len, 0)))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
+ do
+ ret = set_swi_errno(ts, read(ARG(0), s, len));
+ while (ret == -1 && errno == EINTR);
+ unlock_user(s, ARG(1), len);
+ if (ret == (uint32_t)-1)
+ return -1;
+ return len - ret;
+ }
case SYS_READC:
/* XXX: Read from debug cosole. Not implemented. */
return 0;
case SYS_ISTTY:
- return isatty(ARG(0));
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "isatty,%x", ARG(0));
+ return env->regs[0];
+ } else {
+ return isatty(ARG(0));
+ }
case SYS_SEEK:
- ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
- if (ret == (uint32_t)-1)
- return -1;
- return 0;
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "lseek,%x,%x,0", ARG(0), ARG(1));
+ return env->regs[0];
+ } else {
+ ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
+ if (ret == (uint32_t)-1)
+ return -1;
+ return 0;
+ }
case SYS_FLEN:
- {
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_flen_cb, "fstat,%x,%x",
+ ARG(0), env->regs[13]-64);
+ return env->regs[0];
+ } else {
struct stat buf;
ret = set_swi_errno(ts, fstat(ARG(0), &buf));
if (ret == (uint32_t)-1)
/* XXX: Not implemented. */
return -1;
case SYS_REMOVE:
- s = lock_user_string(ARG(0));
- ret = set_swi_errno(ts, remove(s));
- unlock_user(s, ARG(0), 0);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "unlink,%s", ARG(0), (int)ARG(1)+1);
+ ret = env->regs[0];
+ } else {
+ if (!(s = lock_user_string(ARG(0))))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
+ ret = set_swi_errno(ts, remove(s));
+ unlock_user(s, ARG(0), 0);
+ }
return ret;
case SYS_RENAME:
- {
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "rename,%s,%s",
+ ARG(0), (int)ARG(1)+1, ARG(2), (int)ARG(3)+1);
+ return env->regs[0];
+ } else {
char *s2;
s = lock_user_string(ARG(0));
s2 = lock_user_string(ARG(2));
- ret = set_swi_errno(ts, rename(s, s2));
- unlock_user(s2, ARG(2), 0);
- unlock_user(s, ARG(0), 0);
+ if (!s || !s2)
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ ret = (uint32_t)-1;
+ else
+ ret = set_swi_errno(ts, rename(s, s2));
+ if (s2)
+ unlock_user(s2, ARG(2), 0);
+ if (s)
+ unlock_user(s, ARG(0), 0);
return ret;
}
case SYS_CLOCK:
case SYS_TIME:
return set_swi_errno(ts, time(NULL));
case SYS_SYSTEM:
- s = lock_user_string(ARG(0));
- ret = set_swi_errno(ts, system(s));
- unlock_user(s, ARG(0), 0);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(arm_semi_cb, "system,%s", ARG(0), (int)ARG(1)+1);
+ return env->regs[0];
+ } else {
+ if (!(s = lock_user_string(ARG(0))))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
+ ret = set_swi_errno(ts, system(s));
+ unlock_user(s, ARG(0), 0);
+ return ret;
+ }
case SYS_ERRNO:
#ifdef CONFIG_USER_ONLY
return ts->swi_errno;
#else
- return 0;
+ return syscall_err;
#endif
case SYS_GET_CMDLINE:
#ifdef CONFIG_USER_ONLY
char **arg = ts->info->host_argv;
int len = ARG(1);
/* lock the buffer on the ARM side */
- char *cmdline_buffer = (char*)lock_user(ARG(0), len, 0);
+ char *cmdline_buffer = (char*)lock_user(VERIFY_WRITE, ARG(0), len, 0);
+
+ if (!cmdline_buffer)
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
s = cmdline_buffer;
while (*arg && len > 2) {
}
ts->heap_limit = limit;
}
-
- ptr = lock_user(ARG(0), 16, 0);
+
+ if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
ptr[0] = tswap32(ts->heap_base);
ptr[1] = tswap32(ts->heap_limit);
ptr[2] = tswap32(ts->stack_base);
unlock_user(ptr, ARG(0), 16);
#else
limit = ram_size;
- ptr = lock_user(ARG(0), 16, 0);
+ if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
+ /* FIXME - should this error code be -TARGET_EFAULT ? */
+ return (uint32_t)-1;
/* TODO: Make this use the limit of the loaded application. */
ptr[0] = tswap32(limit / 2);
ptr[1] = tswap32(limit);
projects / qemu / blobdiff