[mirror_qemu.git] / arm-semi.c

/*
 *  Arm "Angel" semihosting syscalls
 *
 *  Copyright (c) 2005, 2007 CodeSourcery.
 *  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 <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>

#include "cpu.h"
#ifdef CONFIG_USER_ONLY
#include "qemu.h"

#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
#else
#include "qemu-common.h"
#include "sysemu.h"
#include "gdbstub.h"
#endif

#define SYS_OPEN        0x01
#define SYS_CLOSE       0x02
#define SYS_WRITEC      0x03
#define SYS_WRITE0      0x04
#define SYS_WRITE       0x05
#define SYS_READ        0x06
#define SYS_READC       0x07
#define SYS_ISTTY       0x09
#define SYS_SEEK        0x0a
#define SYS_FLEN        0x0c
#define SYS_TMPNAM      0x0d
#define SYS_REMOVE      0x0e
#define SYS_RENAME      0x0f
#define SYS_CLOCK       0x10
#define SYS_TIME        0x11
#define SYS_SYSTEM      0x12
#define SYS_ERRNO       0x13
#define SYS_GET_CMDLINE 0x15
#define SYS_HEAPINFO    0x16
#define SYS_EXIT        0x18

#ifndef O_BINARY
#define O_BINARY 0
#endif

#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,
    O_RDWR | O_BINARY,
    O_WRONLY | O_CREAT | O_TRUNC,
    O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
    O_RDWR | O_CREAT | O_TRUNC,
    O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
    O_WRONLY | O_CREAT | O_APPEND,
    O_WRONLY | O_CREAT | O_APPEND | O_BINARY,
    O_RDWR | O_CREAT | O_APPEND,
    O_RDWR | O_CREAT | O_APPEND | O_BINARY
};

#ifdef CONFIG_USER_ONLY
static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
{
    if (code == (uint32_t)-1)
        ts->swi_errno = errno;
    return code;
}
#else
static inline uint32_t set_swi_errno(CPUState *env, uint32_t code)
{
    return code;
}

#include "softmmu-semi.h"
#endif

static target_ulong arm_semi_syscall_len;

#if !defined(CONFIG_USER_ONLY)
static target_ulong syscall_err;
#endif

static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
{
#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;
        }
    }
}

static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err)
{
    /* 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)					\
({						\
    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;
    char * s;
    int nr;
    uint32_t ret;
    uint32_t len;
#ifdef CONFIG_USER_ONLY
    TaskState *ts = env->opaque;
#else
    CPUState *ts = env;
#endif

    nr = env->regs[0];
    args = env->regs[1];
    switch (nr) {
    case SYS_OPEN:
        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;
        if (strcmp(s, ":tt") == 0) {
            if (ARG(1) < 4)
                return STDIN_FILENO;
            else
                return STDOUT_FILENO;
        }
        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:
        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;

          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.  */
          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:
        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);
        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);
        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:
        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:
        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)
                return -1;
            return buf.st_size;
        }
    case SYS_TMPNAM:
        /* XXX: Not implemented.  */
        return -1;
    case SYS_REMOVE:
        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));
            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:
        return clock() / (CLOCKS_PER_SEC / 100);
    case SYS_TIME:
        return set_swi_errno(ts, time(NULL));
    case SYS_SYSTEM:
        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 syscall_err;
#endif
    case SYS_GET_CMDLINE:
#ifdef CONFIG_USER_ONLY
        /* Build a commandline from the original argv.  */
        {
            char **arg = ts->info->host_argv;
            int len = ARG(1);
            /* lock the buffer on the ARM side */
            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) {
                int n = strlen(*arg);

                if (s != cmdline_buffer) {
                    *(s++) = ' ';
                    len--;
                }
                if (n >= len)
                    n = len - 1;
                memcpy(s, *arg, n);
                s += n;
                len -= n;
                arg++;
            }
            /* Null terminate the string.  */
            *s = 0;
            len = s - cmdline_buffer;

            /* Unlock the buffer on the ARM side.  */
            unlock_user(cmdline_buffer, ARG(0), len);

            /* Adjust the commandline length argument.  */
            SET_ARG(1, len);

            /* Return success if commandline fit into buffer.  */
            return *arg ? -1 : 0;
        }
#else
      return -1;
#endif
    case SYS_HEAPINFO:
        {
            uint32_t *ptr;
            uint32_t limit;

#ifdef CONFIG_USER_ONLY
            /* Some C libraries assume the heap immediately follows .bss, so
               allocate it using sbrk.  */
            if (!ts->heap_limit) {
                long ret;

                ts->heap_base = do_brk(0);
                limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
                /* Try a big heap, and reduce the size if that fails.  */
                for (;;) {
                    ret = do_brk(limit);
                    if (ret != -1)
                        break;
                    limit = (ts->heap_base >> 1) + (limit >> 1);
                }
                ts->heap_limit = limit;
            }

            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);
            ptr[3] = tswap32(0); /* Stack limit.  */
            unlock_user(ptr, ARG(0), 16);
#else
            limit = ram_size;
            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);
            ptr[2] = tswap32(limit); /* Stack base */
            ptr[3] = tswap32(0); /* Stack limit.  */
            unlock_user(ptr, ARG(0), 16);
#endif
            return 0;
        }
    case SYS_EXIT:
        exit(0);
    default:
        fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
        cpu_dump_state(env, stderr, fprintf, 0);
        abort();
    }
}
Commit	Line	Data
a4f81979 FB	1	/*
a4f81979 FB	2	* Arm "Angel" semihosting syscalls
5fafdf24	3	*
8e71621f PB	4	* Copyright (c) 2005, 2007 CodeSourcery.
8e71621f PB	5	* Written by Paul Brook.
a4f81979 FB	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <sys/types.h>
	23	#include <sys/stat.h>
	24	#include <fcntl.h>
	25	#include <unistd.h>
	26	#include <stdlib.h>
	27	#include <stdio.h>
	28	#include <time.h>
	29
8e71621f PB	30	#include "cpu.h"
8e71621f PB	31	#ifdef CONFIG_USER_ONLY
a4f81979 FB	32	#include "qemu.h"
	33
	34	#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
8e71621f	35	#else
87ecb68b PB	36	#include "qemu-common.h"
	37	#include "sysemu.h"
	38	#include "gdbstub.h"
8e71621f	39	#endif
a4f81979 FB	40
	41	#define SYS_OPEN 0x01
	42	#define SYS_CLOSE 0x02
	43	#define SYS_WRITEC 0x03
	44	#define SYS_WRITE0 0x04
	45	#define SYS_WRITE 0x05
	46	#define SYS_READ 0x06
	47	#define SYS_READC 0x07
	48	#define SYS_ISTTY 0x09
	49	#define SYS_SEEK 0x0a
	50	#define SYS_FLEN 0x0c
	51	#define SYS_TMPNAM 0x0d
	52	#define SYS_REMOVE 0x0e
	53	#define SYS_RENAME 0x0f
	54	#define SYS_CLOCK 0x10
	55	#define SYS_TIME 0x11
	56	#define SYS_SYSTEM 0x12
	57	#define SYS_ERRNO 0x13
	58	#define SYS_GET_CMDLINE 0x15
	59	#define SYS_HEAPINFO 0x16
	60	#define SYS_EXIT 0x18
	61
	62	#ifndef O_BINARY
	63	#define O_BINARY 0
	64	#endif
	65
a2d1ebaf PB	66	#define GDB_O_RDONLY 0x000
	67	#define GDB_O_WRONLY 0x001
	68	#define GDB_O_RDWR 0x002
	69	#define GDB_O_APPEND 0x008
	70	#define GDB_O_CREAT 0x200
	71	#define GDB_O_TRUNC 0x400
	72	#define GDB_O_BINARY 0
	73
	74	static int gdb_open_modeflags[12] = {
	75	GDB_O_RDONLY,
	76	GDB_O_RDONLY \| GDB_O_BINARY,
	77	GDB_O_RDWR,
	78	GDB_O_RDWR \| GDB_O_BINARY,
	79	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_TRUNC,
	80	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_TRUNC \| GDB_O_BINARY,
	81	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_TRUNC,
	82	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_TRUNC \| GDB_O_BINARY,
	83	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_APPEND,
	84	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_APPEND \| GDB_O_BINARY,
	85	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_APPEND,
	86	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_APPEND \| GDB_O_BINARY
	87	};
	88
	89	static int open_modeflags[12] = {
a4f81979 FB	90	O_RDONLY,
	91	O_RDONLY \| O_BINARY,
	92	O_RDWR,
	93	O_RDWR \| O_BINARY,
	94	O_WRONLY \| O_CREAT \| O_TRUNC,
	95	O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	96	O_RDWR \| O_CREAT \| O_TRUNC,
	97	O_RDWR \| O_CREAT \| O_TRUNC \| O_BINARY,
	98	O_WRONLY \| O_CREAT \| O_APPEND,
	99	O_WRONLY \| O_CREAT \| O_APPEND \| O_BINARY,
	100	O_RDWR \| O_CREAT \| O_APPEND,
	101	O_RDWR \| O_CREAT \| O_APPEND \| O_BINARY
	102	};
	103
8e71621f	104	#ifdef CONFIG_USER_ONLY
a4f81979 FB	105	static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
a4f81979 FB	106	{
8e71621f PB	107	if (code == (uint32_t)-1)
	108	ts->swi_errno = errno;
	109	return code;
	110	}
	111	#else
	112	static inline uint32_t set_swi_errno(CPUState *env, uint32_t code)
	113	{
	114	return code;
	115	}
	116
a87295e8	117	#include "softmmu-semi.h"
8e71621f	118	#endif
a4f81979	119
a2d1ebaf PB	120	static target_ulong arm_semi_syscall_len;
a2d1ebaf PB	121
33d9cc8a PB	122	#if !defined(CONFIG_USER_ONLY)
	123	static target_ulong syscall_err;
	124	#endif
	125
a2d1ebaf PB	126	static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
	127	{
	128	#ifdef CONFIG_USER_ONLY
	129	TaskState *ts = env->opaque;
	130	#endif
33d9cc8a	131
a2d1ebaf PB	132	if (ret == (target_ulong)-1) {
	133	#ifdef CONFIG_USER_ONLY
	134	ts->swi_errno = err;
33d9cc8a PB	135	#else
33d9cc8a PB	136	syscall_err = err;
a2d1ebaf PB	137	#endif
	138	env->regs[0] = ret;
	139	} else {
	140	/* Fixup syscalls that use nonstardard return conventions. */
	141	switch (env->regs[0]) {
	142	case SYS_WRITE:
	143	case SYS_READ:
	144	env->regs[0] = arm_semi_syscall_len - ret;
	145	break;
	146	case SYS_SEEK:
	147	env->regs[0] = 0;
	148	break;
	149	default:
	150	env->regs[0] = ret;
	151	break;
	152	}
	153	}
	154	}
	155
33d9cc8a PB	156	static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err)
	157	{
	158	/* The size is always stored in big-endian order, extract
	159	the value. We assume the size always fit in 32 bits. */
	160	uint32_t size;
	161	cpu_memory_rw_debug(env, env->regs[13]-64+32, (uint8_t *)&size, 4, 0);
	162	env->regs[0] = be32_to_cpu(size);
	163	#ifdef CONFIG_USER_ONLY
	164	((TaskState *)env->opaque)->swi_errno = err;
	165	#else
	166	syscall_err = err;
	167	#endif
	168	}
	169
2f619698 FB	170	#define ARG(n) \
	171	({ \
	172	target_ulong __arg; \
	173	/* FIXME - handle get_user() failure */ \
	174	get_user_ual(__arg, args + (n) * 4); \
	175	__arg; \
	176	})
	177	#define SET_ARG(n, val) put_user_ual(val, args + (n) * 4)
a4f81979 FB	178	uint32_t do_arm_semihosting(CPUState *env)
a4f81979 FB	179	{
53a5960a	180	target_ulong args;
a4f81979 FB	181	char * s;
	182	int nr;
	183	uint32_t ret;
8e71621f PB	184	uint32_t len;
8e71621f PB	185	#ifdef CONFIG_USER_ONLY
a4f81979	186	TaskState *ts = env->opaque;
8e71621f PB	187	#else
	188	CPUState *ts = env;
	189	#endif
a4f81979 FB	190
a4f81979 FB	191	nr = env->regs[0];
53a5960a	192	args = env->regs[1];
a4f81979 FB	193	switch (nr) {
a4f81979 FB	194	case SYS_OPEN:
579a97f7 FB	195	if (!(s = lock_user_string(ARG(0))))
	196	/* FIXME - should this error code be -TARGET_EFAULT ? */
	197	return (uint32_t)-1;
a4f81979	198	if (ARG(1) >= 12)
579a97f7	199	return (uint32_t)-1;
a4f81979 FB	200	if (strcmp(s, ":tt") == 0) {
	201	if (ARG(1) < 4)
	202	return STDIN_FILENO;
	203	else
	204	return STDOUT_FILENO;
	205	}
a2d1ebaf	206	if (use_gdb_syscalls()) {
5fafdf24	207	gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0),
33d9cc8a	208	(int)ARG(2)+1, gdb_open_modeflags[ARG(1)]);
a2d1ebaf PB	209	return env->regs[0];
	210	} else {
	211	ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644));
	212	}
8e71621f PB	213	unlock_user(s, ARG(0), 0);
8e71621f PB	214	return ret;
a4f81979	215	case SYS_CLOSE:
a2d1ebaf PB	216	if (use_gdb_syscalls()) {
	217	gdb_do_syscall(arm_semi_cb, "close,%x", ARG(0));
	218	return env->regs[0];
	219	} else {
	220	return set_swi_errno(ts, close(ARG(0)));
	221	}
a4f81979	222	case SYS_WRITEC:
53a5960a	223	{
2f619698 FB	224	char c;
	225
	226	if (get_user_u8(c, args))
	227	/* FIXME - should this error code be -TARGET_EFAULT ? */
	228	return (uint32_t)-1;
53a5960a	229	/* Write to debug console. stderr is near enough. */
a2d1ebaf PB	230	if (use_gdb_syscalls()) {
	231	gdb_do_syscall(arm_semi_cb, "write,2,%x,1", args);
	232	return env->regs[0];
	233	} else {
	234	return write(STDERR_FILENO, &c, 1);
	235	}
53a5960a	236	}
a4f81979	237	case SYS_WRITE0:
579a97f7 FB	238	if (!(s = lock_user_string(args)))
	239	/* FIXME - should this error code be -TARGET_EFAULT ? */
	240	return (uint32_t)-1;
a2d1ebaf PB	241	len = strlen(s);
	242	if (use_gdb_syscalls()) {
	243	gdb_do_syscall(arm_semi_cb, "write,2,%x,%x\n", args, len);
	244	ret = env->regs[0];
	245	} else {
	246	ret = write(STDERR_FILENO, s, len);
	247	}
53a5960a PB	248	unlock_user(s, args, 0);
53a5960a PB	249	return ret;
a4f81979	250	case SYS_WRITE:
8e71621f	251	len = ARG(2);
a2d1ebaf PB	252	if (use_gdb_syscalls()) {
	253	arm_semi_syscall_len = len;
	254	gdb_do_syscall(arm_semi_cb, "write,%x,%x,%x", ARG(0), ARG(1), len);
	255	return env->regs[0];
	256	} else {
579a97f7 FB	257	if (!(s = lock_user(VERIFY_READ, ARG(1), len, 1)))
	258	/* FIXME - should this error code be -TARGET_EFAULT ? */
	259	return (uint32_t)-1;
a2d1ebaf PB	260	ret = set_swi_errno(ts, write(ARG(0), s, len));
	261	unlock_user(s, ARG(1), 0);
	262	if (ret == (uint32_t)-1)
	263	return -1;
	264	return len - ret;
	265	}
a4f81979	266	case SYS_READ:
8e71621f	267	len = ARG(2);
a2d1ebaf PB	268	if (use_gdb_syscalls()) {
	269	arm_semi_syscall_len = len;
	270	gdb_do_syscall(arm_semi_cb, "read,%x,%x,%x", ARG(0), ARG(1), len);
	271	return env->regs[0];
	272	} else {
579a97f7 FB	273	if (!(s = lock_user(VERIFY_WRITE, ARG(1), len, 0)))
	274	/* FIXME - should this error code be -TARGET_EFAULT ? */
	275	return (uint32_t)-1;
a2d1ebaf PB	276	do
	277	ret = set_swi_errno(ts, read(ARG(0), s, len));
	278	while (ret == -1 && errno == EINTR);
	279	unlock_user(s, ARG(1), len);
	280	if (ret == (uint32_t)-1)
	281	return -1;
	282	return len - ret;
	283	}
a4f81979 FB	284	case SYS_READC:
	285	/* XXX: Read from debug cosole. Not implemented. */
	286	return 0;
	287	case SYS_ISTTY:
a2d1ebaf PB	288	if (use_gdb_syscalls()) {
	289	gdb_do_syscall(arm_semi_cb, "isatty,%x", ARG(0));
	290	return env->regs[0];
	291	} else {
	292	return isatty(ARG(0));
	293	}
a4f81979	294	case SYS_SEEK:
a2d1ebaf	295	if (use_gdb_syscalls()) {
33d9cc8a	296	gdb_do_syscall(arm_semi_cb, "lseek,%x,%x,0", ARG(0), ARG(1));
a2d1ebaf PB	297	return env->regs[0];
	298	} else {
	299	ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
	300	if (ret == (uint32_t)-1)
	301	return -1;
	302	return 0;
	303	}
a4f81979	304	case SYS_FLEN:
a2d1ebaf	305	if (use_gdb_syscalls()) {
5fafdf24	306	gdb_do_syscall(arm_semi_flen_cb, "fstat,%x,%x",
33d9cc8a PB	307	ARG(0), env->regs[13]-64);
33d9cc8a PB	308	return env->regs[0];
a2d1ebaf	309	} else {
a4f81979 FB	310	struct stat buf;
	311	ret = set_swi_errno(ts, fstat(ARG(0), &buf));
	312	if (ret == (uint32_t)-1)
	313	return -1;
	314	return buf.st_size;
	315	}
	316	case SYS_TMPNAM:
	317	/* XXX: Not implemented. */
	318	return -1;
	319	case SYS_REMOVE:
a2d1ebaf	320	if (use_gdb_syscalls()) {
33d9cc8a	321	gdb_do_syscall(arm_semi_cb, "unlink,%s", ARG(0), (int)ARG(1)+1);
a2d1ebaf PB	322	ret = env->regs[0];
a2d1ebaf PB	323	} else {
579a97f7 FB	324	if (!(s = lock_user_string(ARG(0))))
	325	/* FIXME - should this error code be -TARGET_EFAULT ? */
	326	return (uint32_t)-1;
a2d1ebaf PB	327	ret = set_swi_errno(ts, remove(s));
	328	unlock_user(s, ARG(0), 0);
	329	}
8e71621f	330	return ret;
a4f81979	331	case SYS_RENAME:
a2d1ebaf PB	332	if (use_gdb_syscalls()) {
a2d1ebaf PB	333	gdb_do_syscall(arm_semi_cb, "rename,%s,%s",
33d9cc8a	334	ARG(0), (int)ARG(1)+1, ARG(2), (int)ARG(3)+1);
a2d1ebaf PB	335	return env->regs[0];
a2d1ebaf PB	336	} else {
8e71621f PB	337	char *s2;
	338	s = lock_user_string(ARG(0));
	339	s2 = lock_user_string(ARG(2));
579a97f7 FB	340	if (!s \|\| !s2)
	341	/* FIXME - should this error code be -TARGET_EFAULT ? */
	342	ret = (uint32_t)-1;
	343	else
	344	ret = set_swi_errno(ts, rename(s, s2));
	345	if (s2)
	346	unlock_user(s2, ARG(2), 0);
	347	if (s)
	348	unlock_user(s, ARG(0), 0);
8e71621f PB	349	return ret;
8e71621f PB	350	}
a4f81979 FB	351	case SYS_CLOCK:
	352	return clock() / (CLOCKS_PER_SEC / 100);
	353	case SYS_TIME:
	354	return set_swi_errno(ts, time(NULL));
	355	case SYS_SYSTEM:
a2d1ebaf	356	if (use_gdb_syscalls()) {
33d9cc8a	357	gdb_do_syscall(arm_semi_cb, "system,%s", ARG(0), (int)ARG(1)+1);
a2d1ebaf PB	358	return env->regs[0];
a2d1ebaf PB	359	} else {
579a97f7 FB	360	if (!(s = lock_user_string(ARG(0))))
	361	/* FIXME - should this error code be -TARGET_EFAULT ? */
	362	return (uint32_t)-1;
a2d1ebaf PB	363	ret = set_swi_errno(ts, system(s));
a2d1ebaf PB	364	unlock_user(s, ARG(0), 0);
a982b531	365	return ret;
a2d1ebaf	366	}
a4f81979	367	case SYS_ERRNO:
8e71621f	368	#ifdef CONFIG_USER_ONLY
a4f81979	369	return ts->swi_errno;
8e71621f	370	#else
33d9cc8a	371	return syscall_err;
8e71621f	372	#endif
a4f81979	373	case SYS_GET_CMDLINE:
8e71621f	374	#ifdef CONFIG_USER_ONLY
38d0662a PB	375	/* Build a commandline from the original argv. */
	376	{
	377	char **arg = ts->info->host_argv;
	378	int len = ARG(1);
	379	/* lock the buffer on the ARM side */
579a97f7 FB	380	char cmdline_buffer = (char)lock_user(VERIFY_WRITE, ARG(0), len, 0);
	381
	382	if (!cmdline_buffer)
	383	/* FIXME - should this error code be -TARGET_EFAULT ? */
	384	return (uint32_t)-1;
38d0662a PB	385
	386	s = cmdline_buffer;
	387	while (*arg && len > 2) {
	388	int n = strlen(*arg);
	389
	390	if (s != cmdline_buffer) {
	391	*(s++) = ' ';
	392	len--;
	393	}
	394	if (n >= len)
	395	n = len - 1;
	396	memcpy(s, *arg, n);
	397	s += n;
	398	len -= n;
	399	arg++;
	400	}
	401	/* Null terminate the string. */
	402	*s = 0;
	403	len = s - cmdline_buffer;
	404
	405	/* Unlock the buffer on the ARM side. */
	406	unlock_user(cmdline_buffer, ARG(0), len);
	407
	408	/* Adjust the commandline length argument. */
	409	SET_ARG(1, len);
	410
	411	/* Return success if commandline fit into buffer. */
	412	return *arg ? -1 : 0;
	413	}
8e71621f PB	414	#else
	415	return -1;
	416	#endif
a4f81979 FB	417	case SYS_HEAPINFO:
	418	{
	419	uint32_t *ptr;
	420	uint32_t limit;
	421
8e71621f PB	422	#ifdef CONFIG_USER_ONLY
8e71621f PB	423	/* Some C libraries assume the heap immediately follows .bss, so
a4f81979 FB	424	allocate it using sbrk. */
	425	if (!ts->heap_limit) {
	426	long ret;
	427
53a5960a	428	ts->heap_base = do_brk(0);
a4f81979 FB	429	limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
	430	/* Try a big heap, and reduce the size if that fails. */
	431	for (;;) {
53a5960a	432	ret = do_brk(limit);
a4f81979 FB	433	if (ret != -1)
	434	break;
	435	limit = (ts->heap_base >> 1) + (limit >> 1);
	436	}
	437	ts->heap_limit = limit;
	438	}
3b46e624	439
579a97f7 FB	440	if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
	441	/* FIXME - should this error code be -TARGET_EFAULT ? */
	442	return (uint32_t)-1;
a4f81979 FB	443	ptr[0] = tswap32(ts->heap_base);
	444	ptr[1] = tswap32(ts->heap_limit);
	445	ptr[2] = tswap32(ts->stack_base);
	446	ptr[3] = tswap32(0); /* Stack limit. */
8e71621f PB	447	unlock_user(ptr, ARG(0), 16);
	448	#else
	449	limit = ram_size;
579a97f7 FB	450	if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
	451	/* FIXME - should this error code be -TARGET_EFAULT ? */
	452	return (uint32_t)-1;
8e71621f PB	453	/* TODO: Make this use the limit of the loaded application. */
	454	ptr[0] = tswap32(limit / 2);
	455	ptr[1] = tswap32(limit);
	456	ptr[2] = tswap32(limit); /* Stack base */
	457	ptr[3] = tswap32(0); /* Stack limit. */
	458	unlock_user(ptr, ARG(0), 16);
	459	#endif
a4f81979 FB	460	return 0;
	461	}
	462	case SYS_EXIT:
	463	exit(0);
	464	default:
	465	fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
	466	cpu_dump_state(env, stderr, fprintf, 0);
	467	abort();
	468	}
	469	}