[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., 51 Franklin Street - Fifth Floor, Boston,
 *  MA 02110-1301, 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
530e7615 BS	19	* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
530e7615 BS	20	* MA 02110-1301, USA.
a4f81979 FB	21	*/
	22
	23	#include <sys/types.h>
	24	#include <sys/stat.h>
	25	#include <fcntl.h>
	26	#include <unistd.h>
	27	#include <stdlib.h>
	28	#include <stdio.h>
	29	#include <time.h>
	30
8e71621f PB	31	#include "cpu.h"
8e71621f PB	32	#ifdef CONFIG_USER_ONLY
a4f81979 FB	33	#include "qemu.h"
	34
	35	#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
8e71621f	36	#else
87ecb68b PB	37	#include "qemu-common.h"
	38	#include "sysemu.h"
	39	#include "gdbstub.h"
8e71621f	40	#endif
a4f81979 FB	41
	42	#define SYS_OPEN 0x01
	43	#define SYS_CLOSE 0x02
	44	#define SYS_WRITEC 0x03
	45	#define SYS_WRITE0 0x04
	46	#define SYS_WRITE 0x05
	47	#define SYS_READ 0x06
	48	#define SYS_READC 0x07
	49	#define SYS_ISTTY 0x09
	50	#define SYS_SEEK 0x0a
	51	#define SYS_FLEN 0x0c
	52	#define SYS_TMPNAM 0x0d
	53	#define SYS_REMOVE 0x0e
	54	#define SYS_RENAME 0x0f
	55	#define SYS_CLOCK 0x10
	56	#define SYS_TIME 0x11
	57	#define SYS_SYSTEM 0x12
	58	#define SYS_ERRNO 0x13
	59	#define SYS_GET_CMDLINE 0x15
	60	#define SYS_HEAPINFO 0x16
	61	#define SYS_EXIT 0x18
	62
	63	#ifndef O_BINARY
	64	#define O_BINARY 0
	65	#endif
	66
a2d1ebaf PB	67	#define GDB_O_RDONLY 0x000
	68	#define GDB_O_WRONLY 0x001
	69	#define GDB_O_RDWR 0x002
	70	#define GDB_O_APPEND 0x008
	71	#define GDB_O_CREAT 0x200
	72	#define GDB_O_TRUNC 0x400
	73	#define GDB_O_BINARY 0
	74
	75	static int gdb_open_modeflags[12] = {
	76	GDB_O_RDONLY,
	77	GDB_O_RDONLY \| GDB_O_BINARY,
	78	GDB_O_RDWR,
	79	GDB_O_RDWR \| GDB_O_BINARY,
	80	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_TRUNC,
	81	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_TRUNC \| GDB_O_BINARY,
	82	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_TRUNC,
	83	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_TRUNC \| GDB_O_BINARY,
	84	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_APPEND,
	85	GDB_O_WRONLY \| GDB_O_CREAT \| GDB_O_APPEND \| GDB_O_BINARY,
	86	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_APPEND,
	87	GDB_O_RDWR \| GDB_O_CREAT \| GDB_O_APPEND \| GDB_O_BINARY
	88	};
	89
	90	static int open_modeflags[12] = {
a4f81979 FB	91	O_RDONLY,
	92	O_RDONLY \| O_BINARY,
	93	O_RDWR,
	94	O_RDWR \| O_BINARY,
	95	O_WRONLY \| O_CREAT \| O_TRUNC,
	96	O_WRONLY \| O_CREAT \| O_TRUNC \| O_BINARY,
	97	O_RDWR \| O_CREAT \| O_TRUNC,
	98	O_RDWR \| O_CREAT \| O_TRUNC \| O_BINARY,
	99	O_WRONLY \| O_CREAT \| O_APPEND,
	100	O_WRONLY \| O_CREAT \| O_APPEND \| O_BINARY,
	101	O_RDWR \| O_CREAT \| O_APPEND,
	102	O_RDWR \| O_CREAT \| O_APPEND \| O_BINARY
	103	};
	104
8e71621f	105	#ifdef CONFIG_USER_ONLY
a4f81979 FB	106	static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
a4f81979 FB	107	{
8e71621f PB	108	if (code == (uint32_t)-1)
	109	ts->swi_errno = errno;
	110	return code;
	111	}
	112	#else
	113	static inline uint32_t set_swi_errno(CPUState *env, uint32_t code)
	114	{
	115	return code;
	116	}
	117
a87295e8	118	#include "softmmu-semi.h"
8e71621f	119	#endif
a4f81979	120
a2d1ebaf PB	121	static target_ulong arm_semi_syscall_len;
a2d1ebaf PB	122
33d9cc8a PB	123	#if !defined(CONFIG_USER_ONLY)
	124	static target_ulong syscall_err;
	125	#endif
	126
a2d1ebaf PB	127	static void arm_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
	128	{
	129	#ifdef CONFIG_USER_ONLY
	130	TaskState *ts = env->opaque;
	131	#endif
33d9cc8a	132
a2d1ebaf PB	133	if (ret == (target_ulong)-1) {
	134	#ifdef CONFIG_USER_ONLY
	135	ts->swi_errno = err;
33d9cc8a PB	136	#else
33d9cc8a PB	137	syscall_err = err;
a2d1ebaf PB	138	#endif
	139	env->regs[0] = ret;
	140	} else {
	141	/* Fixup syscalls that use nonstardard return conventions. */
	142	switch (env->regs[0]) {
	143	case SYS_WRITE:
	144	case SYS_READ:
	145	env->regs[0] = arm_semi_syscall_len - ret;
	146	break;
	147	case SYS_SEEK:
	148	env->regs[0] = 0;
	149	break;
	150	default:
	151	env->regs[0] = ret;
	152	break;
	153	}
	154	}
	155	}
	156
33d9cc8a PB	157	static void arm_semi_flen_cb(CPUState *env, target_ulong ret, target_ulong err)
	158	{
	159	/* The size is always stored in big-endian order, extract
	160	the value. We assume the size always fit in 32 bits. */
	161	uint32_t size;
	162	cpu_memory_rw_debug(env, env->regs[13]-64+32, (uint8_t *)&size, 4, 0);
	163	env->regs[0] = be32_to_cpu(size);
	164	#ifdef CONFIG_USER_ONLY
	165	((TaskState *)env->opaque)->swi_errno = err;
	166	#else
	167	syscall_err = err;
	168	#endif
	169	}
	170
2f619698 FB	171	#define ARG(n) \
	172	({ \
	173	target_ulong __arg; \
	174	/* FIXME - handle get_user() failure */ \
	175	get_user_ual(__arg, args + (n) * 4); \
	176	__arg; \
	177	})
	178	#define SET_ARG(n, val) put_user_ual(val, args + (n) * 4)
a4f81979 FB	179	uint32_t do_arm_semihosting(CPUState *env)
a4f81979 FB	180	{
53a5960a	181	target_ulong args;
a4f81979 FB	182	char * s;
	183	int nr;
	184	uint32_t ret;
8e71621f PB	185	uint32_t len;
8e71621f PB	186	#ifdef CONFIG_USER_ONLY
a4f81979	187	TaskState *ts = env->opaque;
8e71621f PB	188	#else
	189	CPUState *ts = env;
	190	#endif
a4f81979 FB	191
a4f81979 FB	192	nr = env->regs[0];
53a5960a	193	args = env->regs[1];
a4f81979 FB	194	switch (nr) {
a4f81979 FB	195	case SYS_OPEN:
579a97f7 FB	196	if (!(s = lock_user_string(ARG(0))))
	197	/* FIXME - should this error code be -TARGET_EFAULT ? */
	198	return (uint32_t)-1;
a4f81979	199	if (ARG(1) >= 12)
579a97f7	200	return (uint32_t)-1;
a4f81979 FB	201	if (strcmp(s, ":tt") == 0) {
	202	if (ARG(1) < 4)
	203	return STDIN_FILENO;
	204	else
	205	return STDOUT_FILENO;
	206	}
a2d1ebaf	207	if (use_gdb_syscalls()) {
5fafdf24	208	gdb_do_syscall(arm_semi_cb, "open,%s,%x,1a4", ARG(0),
33d9cc8a	209	(int)ARG(2)+1, gdb_open_modeflags[ARG(1)]);
a2d1ebaf PB	210	return env->regs[0];
	211	} else {
	212	ret = set_swi_errno(ts, open(s, open_modeflags[ARG(1)], 0644));
	213	}
8e71621f PB	214	unlock_user(s, ARG(0), 0);
8e71621f PB	215	return ret;
a4f81979	216	case SYS_CLOSE:
a2d1ebaf PB	217	if (use_gdb_syscalls()) {
	218	gdb_do_syscall(arm_semi_cb, "close,%x", ARG(0));
	219	return env->regs[0];
	220	} else {
	221	return set_swi_errno(ts, close(ARG(0)));
	222	}
a4f81979	223	case SYS_WRITEC:
53a5960a	224	{
2f619698 FB	225	char c;
	226
	227	if (get_user_u8(c, args))
	228	/* FIXME - should this error code be -TARGET_EFAULT ? */
	229	return (uint32_t)-1;
53a5960a	230	/* Write to debug console. stderr is near enough. */
a2d1ebaf PB	231	if (use_gdb_syscalls()) {
	232	gdb_do_syscall(arm_semi_cb, "write,2,%x,1", args);
	233	return env->regs[0];
	234	} else {
	235	return write(STDERR_FILENO, &c, 1);
	236	}
53a5960a	237	}
a4f81979	238	case SYS_WRITE0:
579a97f7 FB	239	if (!(s = lock_user_string(args)))
	240	/* FIXME - should this error code be -TARGET_EFAULT ? */
	241	return (uint32_t)-1;
a2d1ebaf PB	242	len = strlen(s);
	243	if (use_gdb_syscalls()) {
	244	gdb_do_syscall(arm_semi_cb, "write,2,%x,%x\n", args, len);
	245	ret = env->regs[0];
	246	} else {
	247	ret = write(STDERR_FILENO, s, len);
	248	}
53a5960a PB	249	unlock_user(s, args, 0);
53a5960a PB	250	return ret;
a4f81979	251	case SYS_WRITE:
8e71621f	252	len = ARG(2);
a2d1ebaf PB	253	if (use_gdb_syscalls()) {
	254	arm_semi_syscall_len = len;
	255	gdb_do_syscall(arm_semi_cb, "write,%x,%x,%x", ARG(0), ARG(1), len);
	256	return env->regs[0];
	257	} else {
579a97f7 FB	258	if (!(s = lock_user(VERIFY_READ, ARG(1), len, 1)))
	259	/* FIXME - should this error code be -TARGET_EFAULT ? */
	260	return (uint32_t)-1;
a2d1ebaf PB	261	ret = set_swi_errno(ts, write(ARG(0), s, len));
	262	unlock_user(s, ARG(1), 0);
	263	if (ret == (uint32_t)-1)
	264	return -1;
	265	return len - ret;
	266	}
a4f81979	267	case SYS_READ:
8e71621f	268	len = ARG(2);
a2d1ebaf PB	269	if (use_gdb_syscalls()) {
	270	arm_semi_syscall_len = len;
	271	gdb_do_syscall(arm_semi_cb, "read,%x,%x,%x", ARG(0), ARG(1), len);
	272	return env->regs[0];
	273	} else {
579a97f7 FB	274	if (!(s = lock_user(VERIFY_WRITE, ARG(1), len, 0)))
	275	/* FIXME - should this error code be -TARGET_EFAULT ? */
	276	return (uint32_t)-1;
a2d1ebaf PB	277	do
	278	ret = set_swi_errno(ts, read(ARG(0), s, len));
	279	while (ret == -1 && errno == EINTR);
	280	unlock_user(s, ARG(1), len);
	281	if (ret == (uint32_t)-1)
	282	return -1;
	283	return len - ret;
	284	}
a4f81979 FB	285	case SYS_READC:
	286	/* XXX: Read from debug cosole. Not implemented. */
	287	return 0;
	288	case SYS_ISTTY:
a2d1ebaf PB	289	if (use_gdb_syscalls()) {
	290	gdb_do_syscall(arm_semi_cb, "isatty,%x", ARG(0));
	291	return env->regs[0];
	292	} else {
	293	return isatty(ARG(0));
	294	}
a4f81979	295	case SYS_SEEK:
a2d1ebaf	296	if (use_gdb_syscalls()) {
33d9cc8a	297	gdb_do_syscall(arm_semi_cb, "lseek,%x,%x,0", ARG(0), ARG(1));
a2d1ebaf PB	298	return env->regs[0];
	299	} else {
	300	ret = set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
	301	if (ret == (uint32_t)-1)
	302	return -1;
	303	return 0;
	304	}
a4f81979	305	case SYS_FLEN:
a2d1ebaf	306	if (use_gdb_syscalls()) {
5fafdf24	307	gdb_do_syscall(arm_semi_flen_cb, "fstat,%x,%x",
33d9cc8a PB	308	ARG(0), env->regs[13]-64);
33d9cc8a PB	309	return env->regs[0];
a2d1ebaf	310	} else {
a4f81979 FB	311	struct stat buf;
	312	ret = set_swi_errno(ts, fstat(ARG(0), &buf));
	313	if (ret == (uint32_t)-1)
	314	return -1;
	315	return buf.st_size;
	316	}
	317	case SYS_TMPNAM:
	318	/* XXX: Not implemented. */
	319	return -1;
	320	case SYS_REMOVE:
a2d1ebaf	321	if (use_gdb_syscalls()) {
33d9cc8a	322	gdb_do_syscall(arm_semi_cb, "unlink,%s", ARG(0), (int)ARG(1)+1);
a2d1ebaf PB	323	ret = env->regs[0];
a2d1ebaf PB	324	} else {
579a97f7 FB	325	if (!(s = lock_user_string(ARG(0))))
	326	/* FIXME - should this error code be -TARGET_EFAULT ? */
	327	return (uint32_t)-1;
a2d1ebaf PB	328	ret = set_swi_errno(ts, remove(s));
	329	unlock_user(s, ARG(0), 0);
	330	}
8e71621f	331	return ret;
a4f81979	332	case SYS_RENAME:
a2d1ebaf PB	333	if (use_gdb_syscalls()) {
a2d1ebaf PB	334	gdb_do_syscall(arm_semi_cb, "rename,%s,%s",
33d9cc8a	335	ARG(0), (int)ARG(1)+1, ARG(2), (int)ARG(3)+1);
a2d1ebaf PB	336	return env->regs[0];
a2d1ebaf PB	337	} else {
8e71621f PB	338	char *s2;
	339	s = lock_user_string(ARG(0));
	340	s2 = lock_user_string(ARG(2));
579a97f7 FB	341	if (!s \|\| !s2)
	342	/* FIXME - should this error code be -TARGET_EFAULT ? */
	343	ret = (uint32_t)-1;
	344	else
	345	ret = set_swi_errno(ts, rename(s, s2));
	346	if (s2)
	347	unlock_user(s2, ARG(2), 0);
	348	if (s)
	349	unlock_user(s, ARG(0), 0);
8e71621f PB	350	return ret;
8e71621f PB	351	}
a4f81979 FB	352	case SYS_CLOCK:
	353	return clock() / (CLOCKS_PER_SEC / 100);
	354	case SYS_TIME:
	355	return set_swi_errno(ts, time(NULL));
	356	case SYS_SYSTEM:
a2d1ebaf	357	if (use_gdb_syscalls()) {
33d9cc8a	358	gdb_do_syscall(arm_semi_cb, "system,%s", ARG(0), (int)ARG(1)+1);
a2d1ebaf PB	359	return env->regs[0];
a2d1ebaf PB	360	} else {
579a97f7 FB	361	if (!(s = lock_user_string(ARG(0))))
	362	/* FIXME - should this error code be -TARGET_EFAULT ? */
	363	return (uint32_t)-1;
a2d1ebaf PB	364	ret = set_swi_errno(ts, system(s));
a2d1ebaf PB	365	unlock_user(s, ARG(0), 0);
a982b531	366	return ret;
a2d1ebaf	367	}
a4f81979	368	case SYS_ERRNO:
8e71621f	369	#ifdef CONFIG_USER_ONLY
a4f81979	370	return ts->swi_errno;
8e71621f	371	#else
33d9cc8a	372	return syscall_err;
8e71621f	373	#endif
a4f81979	374	case SYS_GET_CMDLINE:
8e71621f	375	#ifdef CONFIG_USER_ONLY
38d0662a PB	376	/* Build a commandline from the original argv. */
	377	{
	378	char **arg = ts->info->host_argv;
	379	int len = ARG(1);
	380	/* lock the buffer on the ARM side */
579a97f7 FB	381	char cmdline_buffer = (char)lock_user(VERIFY_WRITE, ARG(0), len, 0);
	382
	383	if (!cmdline_buffer)
	384	/* FIXME - should this error code be -TARGET_EFAULT ? */
	385	return (uint32_t)-1;
38d0662a PB	386
	387	s = cmdline_buffer;
	388	while (*arg && len > 2) {
	389	int n = strlen(*arg);
	390
	391	if (s != cmdline_buffer) {
	392	*(s++) = ' ';
	393	len--;
	394	}
	395	if (n >= len)
	396	n = len - 1;
	397	memcpy(s, *arg, n);
	398	s += n;
	399	len -= n;
	400	arg++;
	401	}
	402	/* Null terminate the string. */
	403	*s = 0;
	404	len = s - cmdline_buffer;
	405
	406	/* Unlock the buffer on the ARM side. */
	407	unlock_user(cmdline_buffer, ARG(0), len);
	408
	409	/* Adjust the commandline length argument. */
	410	SET_ARG(1, len);
	411
	412	/* Return success if commandline fit into buffer. */
	413	return *arg ? -1 : 0;
	414	}
8e71621f PB	415	#else
	416	return -1;
	417	#endif
a4f81979 FB	418	case SYS_HEAPINFO:
	419	{
	420	uint32_t *ptr;
	421	uint32_t limit;
	422
8e71621f PB	423	#ifdef CONFIG_USER_ONLY
8e71621f PB	424	/* Some C libraries assume the heap immediately follows .bss, so
a4f81979 FB	425	allocate it using sbrk. */
	426	if (!ts->heap_limit) {
	427	long ret;
	428
53a5960a	429	ts->heap_base = do_brk(0);
a4f81979 FB	430	limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
	431	/* Try a big heap, and reduce the size if that fails. */
	432	for (;;) {
53a5960a	433	ret = do_brk(limit);
a4f81979 FB	434	if (ret != -1)
	435	break;
	436	limit = (ts->heap_base >> 1) + (limit >> 1);
	437	}
	438	ts->heap_limit = limit;
	439	}
3b46e624	440
579a97f7 FB	441	if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
	442	/* FIXME - should this error code be -TARGET_EFAULT ? */
	443	return (uint32_t)-1;
a4f81979 FB	444	ptr[0] = tswap32(ts->heap_base);
	445	ptr[1] = tswap32(ts->heap_limit);
	446	ptr[2] = tswap32(ts->stack_base);
	447	ptr[3] = tswap32(0); /* Stack limit. */
8e71621f PB	448	unlock_user(ptr, ARG(0), 16);
	449	#else
	450	limit = ram_size;
579a97f7 FB	451	if (!(ptr = lock_user(VERIFY_WRITE, ARG(0), 16, 0)))
	452	/* FIXME - should this error code be -TARGET_EFAULT ? */
	453	return (uint32_t)-1;
8e71621f PB	454	/* TODO: Make this use the limit of the loaded application. */
	455	ptr[0] = tswap32(limit / 2);
	456	ptr[1] = tswap32(limit);
	457	ptr[2] = tswap32(limit); /* Stack base */
	458	ptr[3] = tswap32(0); /* Stack limit. */
	459	unlock_user(ptr, ARG(0), 16);
	460	#endif
a4f81979 FB	461	return 0;
	462	}
	463	case SYS_EXIT:
	464	exit(0);
	465	default:
	466	fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
	467	cpu_dump_state(env, stderr, fprintf, 0);
	468	abort();
	469	}
	470	}