[qemu.git] / target / arm / 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, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"

#include "cpu.h"
#include "exec/semihost.h"
#ifdef CONFIG_USER_ONLY
#include "qemu.h"

#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
#else
#include "qemu-common.h"
#include "exec/gdbstub.h"
#include "hw/arm/arm.h"
#include "qemu/cutils.h"
#endif

#define TARGET_SYS_OPEN        0x01
#define TARGET_SYS_CLOSE       0x02
#define TARGET_SYS_WRITEC      0x03
#define TARGET_SYS_WRITE0      0x04
#define TARGET_SYS_WRITE       0x05
#define TARGET_SYS_READ        0x06
#define TARGET_SYS_READC       0x07
#define TARGET_SYS_ISTTY       0x09
#define TARGET_SYS_SEEK        0x0a
#define TARGET_SYS_FLEN        0x0c
#define TARGET_SYS_TMPNAM      0x0d
#define TARGET_SYS_REMOVE      0x0e
#define TARGET_SYS_RENAME      0x0f
#define TARGET_SYS_CLOCK       0x10
#define TARGET_SYS_TIME        0x11
#define TARGET_SYS_SYSTEM      0x12
#define TARGET_SYS_ERRNO       0x13
#define TARGET_SYS_GET_CMDLINE 0x15
#define TARGET_SYS_HEAPINFO    0x16
#define TARGET_SYS_EXIT        0x18
#define TARGET_SYS_SYNCCACHE   0x19

/* ADP_Stopped_ApplicationExit is used for exit(0),
 * anything else is implemented as exit(1) */
#define ADP_Stopped_ApplicationExit     (0x20026)

#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(CPUARMState *env, uint32_t code)
{
    return code;
}

#include "exec/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 *cs, target_ulong ret, target_ulong err)
{
    ARMCPU *cpu = ARM_CPU(cs);
    CPUARMState *env = &cpu->env;
#ifdef CONFIG_USER_ONLY
    TaskState *ts = cs->opaque;
#endif
    target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];

    if (ret == (target_ulong)-1) {
#ifdef CONFIG_USER_ONLY
        ts->swi_errno = err;
#else
	syscall_err = err;
#endif
        reg0 = ret;
    } else {
        /* Fixup syscalls that use nonstardard return conventions.  */
        switch (reg0) {
        case TARGET_SYS_WRITE:
        case TARGET_SYS_READ:
            reg0 = arm_semi_syscall_len - ret;
            break;
        case TARGET_SYS_SEEK:
            reg0 = 0;
            break;
        default:
            reg0 = ret;
            break;
        }
    }
    if (is_a64(env)) {
        env->xregs[0] = reg0;
    } else {
        env->regs[0] = reg0;
    }
}

static target_ulong arm_flen_buf(ARMCPU *cpu)
{
    /* Return an address in target memory of 64 bytes where the remote
     * gdb should write its stat struct. (The format of this structure
     * is defined by GDB's remote protocol and is not target-specific.)
     * We put this on the guest's stack just below SP.
     */
    CPUARMState *env = &cpu->env;
    target_ulong sp;

    if (is_a64(env)) {
        sp = env->xregs[31];
    } else {
        sp = env->regs[13];
    }

    return sp - 64;
}

static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
{
    ARMCPU *cpu = ARM_CPU(cs);
    CPUARMState *env = &cpu->env;
    /* 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(cs, arm_flen_buf(cpu) + 32, (uint8_t *)&size, 4, 0);
    size = be32_to_cpu(size);
    if (is_a64(env)) {
        env->xregs[0] = size;
    } else {
        env->regs[0] = size;
    }
#ifdef CONFIG_USER_ONLY
    ((TaskState *)cs->opaque)->swi_errno = err;
#else
    syscall_err = err;
#endif
}

static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
                                    const char *fmt, ...)
{
    va_list va;
    CPUARMState *env = &cpu->env;

    va_start(va, fmt);
    gdb_do_syscallv(cb, fmt, va);
    va_end(va);

    /* FIXME: we are implicitly relying on the syscall completing
     * before this point, which is not guaranteed. We should
     * put in an explicit synchronization between this and
     * the callback function.
     */

    return is_a64(env) ? env->xregs[0] : env->regs[0];
}

/* Read the input value from the argument block; fail the semihosting
 * call if the memory read fails.
 */
#define GET_ARG(n) do {                                 \
    if (is_a64(env)) {                                  \
        if (get_user_u64(arg ## n, args + (n) * 8)) {   \
            return -1;                                  \
        }                                               \
    } else {                                            \
        if (get_user_u32(arg ## n, args + (n) * 4)) {   \
            return -1;                                  \
        }                                               \
    }                                                   \
} while (0)

#define SET_ARG(n, val)                                 \
    (is_a64(env) ?                                      \
     put_user_u64(val, args + (n) * 8) :                \
     put_user_u32(val, args + (n) * 4))

target_ulong do_arm_semihosting(CPUARMState *env)
{
    ARMCPU *cpu = arm_env_get_cpu(env);
    CPUState *cs = CPU(cpu);
    target_ulong args;
    target_ulong arg0, arg1, arg2, arg3;
    char * s;
    int nr;
    uint32_t ret;
    uint32_t len;
#ifdef CONFIG_USER_ONLY
    TaskState *ts = cs->opaque;
#else
    CPUARMState *ts = env;
#endif

    if (is_a64(env)) {
        /* Note that the syscall number is in W0, not X0 */
        nr = env->xregs[0] & 0xffffffffU;
        args = env->xregs[1];
    } else {
        nr = env->regs[0];
        args = env->regs[1];
    }

    switch (nr) {
    case TARGET_SYS_OPEN:
        GET_ARG(0);
        GET_ARG(1);
        GET_ARG(2);
        s = lock_user_string(arg0);
        if (!s) {
            /* FIXME - should this error code be -TARGET_EFAULT ? */
            return (uint32_t)-1;
        }
        if (arg1 >= 12) {
            unlock_user(s, arg0, 0);
            return (uint32_t)-1;
        }
        if (strcmp(s, ":tt") == 0) {
            int result_fileno = arg1 < 4 ? STDIN_FILENO : STDOUT_FILENO;
            unlock_user(s, arg0, 0);
            return result_fileno;
        }
        if (use_gdb_syscalls()) {
            ret = arm_gdb_syscall(cpu, arm_semi_cb, "open,%s,%x,1a4", arg0,
                                  (int)arg2+1, gdb_open_modeflags[arg1]);
        } else {
            ret = set_swi_errno(ts, open(s, open_modeflags[arg1], 0644));
        }
        unlock_user(s, arg0, 0);
        return ret;
    case TARGET_SYS_CLOSE:
        GET_ARG(0);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", arg0);
        } else {
            return set_swi_errno(ts, close(arg0));
        }
    case TARGET_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()) {
                return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,1", args);
          } else {
                return write(STDERR_FILENO, &c, 1);
          }
        }
    case TARGET_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()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,%x",
                                   args, len);
        } else {
            ret = write(STDERR_FILENO, s, len);
        }
        unlock_user(s, args, 0);
        return ret;
    case TARGET_SYS_WRITE:
        GET_ARG(0);
        GET_ARG(1);
        GET_ARG(2);
        len = arg2;
        if (use_gdb_syscalls()) {
            arm_semi_syscall_len = len;
            return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
                                   arg0, arg1, len);
        } else {
            s = lock_user(VERIFY_READ, arg1, len, 1);
            if (!s) {
                /* FIXME - should this error code be -TARGET_EFAULT ? */
                return (uint32_t)-1;
            }
            ret = set_swi_errno(ts, write(arg0, s, len));
            unlock_user(s, arg1, 0);
            if (ret == (uint32_t)-1)
                return -1;
            return len - ret;
        }
    case TARGET_SYS_READ:
        GET_ARG(0);
        GET_ARG(1);
        GET_ARG(2);
        len = arg2;
        if (use_gdb_syscalls()) {
            arm_semi_syscall_len = len;
            return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
                                   arg0, arg1, len);
        } else {
            s = lock_user(VERIFY_WRITE, arg1, len, 0);
            if (!s) {
                /* FIXME - should this error code be -TARGET_EFAULT ? */
                return (uint32_t)-1;
            }
            do {
                ret = set_swi_errno(ts, read(arg0, s, len));
            } while (ret == -1 && errno == EINTR);
            unlock_user(s, arg1, len);
            if (ret == (uint32_t)-1)
                return -1;
            return len - ret;
        }
    case TARGET_SYS_READC:
       /* XXX: Read from debug console. Not implemented.  */
        return 0;
    case TARGET_SYS_ISTTY:
        GET_ARG(0);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", arg0);
        } else {
            return isatty(arg0);
        }
    case TARGET_SYS_SEEK:
        GET_ARG(0);
        GET_ARG(1);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0",
                                   arg0, arg1);
        } else {
            ret = set_swi_errno(ts, lseek(arg0, arg1, SEEK_SET));
            if (ret == (uint32_t)-1)
              return -1;
            return 0;
        }
    case TARGET_SYS_FLEN:
        GET_ARG(0);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x",
                                   arg0, arm_flen_buf(cpu));
        } else {
            struct stat buf;
            ret = set_swi_errno(ts, fstat(arg0, &buf));
            if (ret == (uint32_t)-1)
                return -1;
            return buf.st_size;
        }
    case TARGET_SYS_TMPNAM:
        /* XXX: Not implemented.  */
        return -1;
    case TARGET_SYS_REMOVE:
        GET_ARG(0);
        GET_ARG(1);
        if (use_gdb_syscalls()) {
            ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s",
                                  arg0, (int)arg1+1);
        } else {
            s = lock_user_string(arg0);
            if (!s) {
                /* FIXME - should this error code be -TARGET_EFAULT ? */
                return (uint32_t)-1;
            }
            ret =  set_swi_errno(ts, remove(s));
            unlock_user(s, arg0, 0);
        }
        return ret;
    case TARGET_SYS_RENAME:
        GET_ARG(0);
        GET_ARG(1);
        GET_ARG(2);
        GET_ARG(3);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s",
                                   arg0, (int)arg1+1, arg2, (int)arg3+1);
        } else {
            char *s2;
            s = lock_user_string(arg0);
            s2 = lock_user_string(arg2);
            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, arg2, 0);
            if (s)
                unlock_user(s, arg0, 0);
            return ret;
        }
    case TARGET_SYS_CLOCK:
        return clock() / (CLOCKS_PER_SEC / 100);
    case TARGET_SYS_TIME:
        return set_swi_errno(ts, time(NULL));
    case TARGET_SYS_SYSTEM:
        GET_ARG(0);
        GET_ARG(1);
        if (use_gdb_syscalls()) {
            return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s",
                                   arg0, (int)arg1+1);
        } else {
            s = lock_user_string(arg0);
            if (!s) {
                /* FIXME - should this error code be -TARGET_EFAULT ? */
                return (uint32_t)-1;
            }
            ret = set_swi_errno(ts, system(s));
            unlock_user(s, arg0, 0);
            return ret;
        }
    case TARGET_SYS_ERRNO:
#ifdef CONFIG_USER_ONLY
        return ts->swi_errno;
#else
        return syscall_err;
#endif
    case TARGET_SYS_GET_CMDLINE:
        {
            /* Build a command-line from the original argv.
             *
             * The inputs are:
             *     * arg0, pointer to a buffer of at least the size
             *               specified in arg1.
             *     * arg1, size of the buffer pointed to by arg0 in
             *               bytes.
             *
             * The outputs are:
             *     * arg0, pointer to null-terminated string of the
             *               command line.
             *     * arg1, length of the string pointed to by arg0.
             */

            char *output_buffer;
            size_t input_size;
            size_t output_size;
            int status = 0;
#if !defined(CONFIG_USER_ONLY)
            const char *cmdline;
#endif
            GET_ARG(0);
            GET_ARG(1);
            input_size = arg1;
            /* Compute the size of the output string.  */
#if !defined(CONFIG_USER_ONLY)
            cmdline = semihosting_get_cmdline();
            if (cmdline == NULL) {
                cmdline = ""; /* Default to an empty line. */
            }
            output_size = strlen(cmdline) + 1; /* Count terminating 0. */
#else
            unsigned int i;

            output_size = ts->info->arg_end - ts->info->arg_start;
            if (!output_size) {
                /* We special-case the "empty command line" case (argc==0).
                   Just provide the terminating 0. */
                output_size = 1;
            }
#endif

            if (output_size > input_size) {
                 /* Not enough space to store command-line arguments.  */
                return -1;
            }

            /* Adjust the command-line length.  */
            if (SET_ARG(1, output_size - 1)) {
                /* Couldn't write back to argument block */
                return -1;
            }

            /* Lock the buffer on the ARM side.  */
            output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
            if (!output_buffer) {
                return -1;
            }

            /* Copy the command-line arguments.  */
#if !defined(CONFIG_USER_ONLY)
            pstrcpy(output_buffer, output_size, cmdline);
#else
            if (output_size == 1) {
                /* Empty command-line.  */
                output_buffer[0] = '\0';
                goto out;
            }

            if (copy_from_user(output_buffer, ts->info->arg_start,
                               output_size)) {
                status = -1;
                goto out;
            }

            /* Separate arguments by white spaces.  */
            for (i = 0; i < output_size - 1; i++) {
                if (output_buffer[i] == 0) {
                    output_buffer[i] = ' ';
                }
            }
        out:
#endif
            /* Unlock the buffer on the ARM side.  */
            unlock_user(output_buffer, arg0, output_size);

            return status;
        }
    case TARGET_SYS_HEAPINFO:
        {
            target_ulong retvals[4];
            target_ulong limit;
            int i;

            GET_ARG(0);

#ifdef CONFIG_USER_ONLY
            /* Some C libraries assume the heap immediately follows .bss, so
               allocate it using sbrk.  */
            if (!ts->heap_limit) {
                abi_ulong 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 >= limit) {
                        break;
                    }
                    limit = (ts->heap_base >> 1) + (limit >> 1);
                }
                ts->heap_limit = limit;
            }

            retvals[0] = ts->heap_base;
            retvals[1] = ts->heap_limit;
            retvals[2] = ts->stack_base;
            retvals[3] = 0; /* Stack limit.  */
#else
            limit = ram_size;
            /* TODO: Make this use the limit of the loaded application.  */
            retvals[0] = limit / 2;
            retvals[1] = limit;
            retvals[2] = limit; /* Stack base */
            retvals[3] = 0; /* Stack limit.  */
#endif

            for (i = 0; i < ARRAY_SIZE(retvals); i++) {
                bool fail;

                if (is_a64(env)) {
                    fail = put_user_u64(retvals[i], arg0 + i * 8);
                } else {
                    fail = put_user_u32(retvals[i], arg0 + i * 4);
                }

                if (fail) {
                    /* Couldn't write back to argument block */
                    return -1;
                }
            }
            return 0;
        }
    case TARGET_SYS_EXIT:
        if (is_a64(env)) {
            /* The A64 version of this call takes a parameter block,
             * so the application-exit type can return a subcode which
             * is the exit status code from the application.
             */
            GET_ARG(0);
            GET_ARG(1);

            if (arg0 == ADP_Stopped_ApplicationExit) {
                ret = arg1;
            } else {
                ret = 1;
            }
        } else {
            /* ARM specifies only Stopped_ApplicationExit as normal
             * exit, everything else is considered an error */
            ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
        }
        gdb_exit(env, ret);
        exit(ret);
    case TARGET_SYS_SYNCCACHE:
        /* Clean the D-cache and invalidate the I-cache for the specified
         * virtual address range. This is a nop for us since we don't
         * implement caches. This is only present on A64.
         */
        if (is_a64(env)) {
            return 0;
        }
        /* fall through -- invalid for A32/T32 */
    default:
        fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
        cpu_dump_state(cs, 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
8167ee88	18	* along with this program; if not, see <http://www.gnu.org/licenses/>.
a4f81979 FB	19	*/
a4f81979 FB	20
74c21bd0	21	#include "qemu/osdep.h"
a4f81979	22
8e71621f	23	#include "cpu.h"
a59d31a1	24	#include "exec/semihost.h"
8e71621f	25	#ifdef CONFIG_USER_ONLY
a4f81979 FB	26	#include "qemu.h"
	27
	28	#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
8e71621f	29	#else
87ecb68b	30	#include "qemu-common.h"
022c62cb	31	#include "exec/gdbstub.h"
bd2be150	32	#include "hw/arm/arm.h"
f348b6d1	33	#include "qemu/cutils.h"
8e71621f	34	#endif
a4f81979	35
3881725c SW	36	#define TARGET_SYS_OPEN 0x01
	37	#define TARGET_SYS_CLOSE 0x02
	38	#define TARGET_SYS_WRITEC 0x03
	39	#define TARGET_SYS_WRITE0 0x04
	40	#define TARGET_SYS_WRITE 0x05
	41	#define TARGET_SYS_READ 0x06
	42	#define TARGET_SYS_READC 0x07
	43	#define TARGET_SYS_ISTTY 0x09
	44	#define TARGET_SYS_SEEK 0x0a
	45	#define TARGET_SYS_FLEN 0x0c
	46	#define TARGET_SYS_TMPNAM 0x0d
	47	#define TARGET_SYS_REMOVE 0x0e
	48	#define TARGET_SYS_RENAME 0x0f
	49	#define TARGET_SYS_CLOCK 0x10
	50	#define TARGET_SYS_TIME 0x11
	51	#define TARGET_SYS_SYSTEM 0x12
	52	#define TARGET_SYS_ERRNO 0x13
	53	#define TARGET_SYS_GET_CMDLINE 0x15
	54	#define TARGET_SYS_HEAPINFO 0x16
	55	#define TARGET_SYS_EXIT 0x18
e9ebfbfc	56	#define TARGET_SYS_SYNCCACHE 0x19
a4f81979	57
1ecc3a2d LI	58	/* ADP_Stopped_ApplicationExit is used for exit(0),
	59	* anything else is implemented as exit(1) */
	60	#define ADP_Stopped_ApplicationExit (0x20026)
	61
a4f81979 FB	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
81926f47	112	static inline uint32_t set_swi_errno(CPUARMState *env, uint32_t code)
8e71621f PB	113	{
	114	return code;
	115	}
	116
022c62cb	117	#include "exec/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
9e0c5422	126	static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
a2d1ebaf	127	{
9e0c5422 AF	128	ARMCPU *cpu = ARM_CPU(cs);
9e0c5422 AF	129	CPUARMState *env = &cpu->env;
a2d1ebaf	130	#ifdef CONFIG_USER_ONLY
0429a971	131	TaskState *ts = cs->opaque;
a2d1ebaf	132	#endif
faacc041	133	target_ulong reg0 = is_a64(env) ? env->xregs[0] : env->regs[0];
33d9cc8a	134
a2d1ebaf PB	135	if (ret == (target_ulong)-1) {
	136	#ifdef CONFIG_USER_ONLY
	137	ts->swi_errno = err;
33d9cc8a PB	138	#else
33d9cc8a PB	139	syscall_err = err;
a2d1ebaf	140	#endif
bb19cbc9	141	reg0 = ret;
a2d1ebaf PB	142	} else {
a2d1ebaf PB	143	/* Fixup syscalls that use nonstardard return conventions. */
bb19cbc9	144	switch (reg0) {
3881725c SW	145	case TARGET_SYS_WRITE:
3881725c SW	146	case TARGET_SYS_READ:
bb19cbc9	147	reg0 = arm_semi_syscall_len - ret;
a2d1ebaf	148	break;
3881725c	149	case TARGET_SYS_SEEK:
bb19cbc9	150	reg0 = 0;
a2d1ebaf PB	151	break;
a2d1ebaf PB	152	default:
bb19cbc9	153	reg0 = ret;
a2d1ebaf PB	154	break;
	155	}
	156	}
faacc041 PM	157	if (is_a64(env)) {
	158	env->xregs[0] = reg0;
	159	} else {
	160	env->regs[0] = reg0;
	161	}
	162	}
	163
	164	static target_ulong arm_flen_buf(ARMCPU *cpu)
	165	{
	166	/* Return an address in target memory of 64 bytes where the remote
	167	* gdb should write its stat struct. (The format of this structure
	168	* is defined by GDB's remote protocol and is not target-specific.)
	169	* We put this on the guest's stack just below SP.
	170	*/
	171	CPUARMState *env = &cpu->env;
	172	target_ulong sp;
	173
	174	if (is_a64(env)) {
	175	sp = env->xregs[31];
	176	} else {
	177	sp = env->regs[13];
	178	}
	179
	180	return sp - 64;
a2d1ebaf PB	181	}
a2d1ebaf PB	182
9e0c5422	183	static void arm_semi_flen_cb(CPUState *cs, target_ulong ret, target_ulong err)
33d9cc8a	184	{
9e0c5422 AF	185	ARMCPU *cpu = ARM_CPU(cs);
9e0c5422 AF	186	CPUARMState *env = &cpu->env;
33d9cc8a PB	187	/* The size is always stored in big-endian order, extract
	188	the value. We assume the size always fit in 32 bits. */
	189	uint32_t size;
faacc041 PM	190	cpu_memory_rw_debug(cs, arm_flen_buf(cpu) + 32, (uint8_t *)&size, 4, 0);
	191	size = be32_to_cpu(size);
	192	if (is_a64(env)) {
	193	env->xregs[0] = size;
	194	} else {
	195	env->regs[0] = size;
	196	}
33d9cc8a	197	#ifdef CONFIG_USER_ONLY
0429a971	198	((TaskState *)cs->opaque)->swi_errno = err;
33d9cc8a PB	199	#else
	200	syscall_err = err;
	201	#endif
	202	}
	203
bb19cbc9 PM	204	static target_ulong arm_gdb_syscall(ARMCPU *cpu, gdb_syscall_complete_cb cb,
	205	const char *fmt, ...)
	206	{
	207	va_list va;
	208	CPUARMState *env = &cpu->env;
	209
	210	va_start(va, fmt);
	211	gdb_do_syscallv(cb, fmt, va);
	212	va_end(va);
	213
	214	/* FIXME: we are implicitly relying on the syscall completing
	215	* before this point, which is not guaranteed. We should
	216	* put in an explicit synchronization between this and
	217	* the callback function.
	218	*/
	219
faacc041	220	return is_a64(env) ? env->xregs[0] : env->regs[0];
bb19cbc9 PM	221	}
bb19cbc9 PM	222
f296c0d1 PM	223	/* Read the input value from the argument block; fail the semihosting
	224	* call if the memory read fails.
	225	*/
	226	#define GET_ARG(n) do { \
faacc041 PM	227	if (is_a64(env)) { \
	228	if (get_user_u64(arg ## n, args + (n) * 8)) { \
	229	return -1; \
	230	} \
	231	} else { \
	232	if (get_user_u32(arg ## n, args + (n) * 4)) { \
	233	return -1; \
	234	} \
f296c0d1 PM	235	} \
	236	} while (0)
	237
faacc041 PM	238	#define SET_ARG(n, val) \
	239	(is_a64(env) ? \
	240	put_user_u64(val, args + (n) * 8) : \
	241	put_user_u32(val, args + (n) * 4))
	242
	243	target_ulong do_arm_semihosting(CPUARMState *env)
a4f81979	244	{
878096ee	245	ARMCPU *cpu = arm_env_get_cpu(env);
0429a971	246	CPUState *cs = CPU(cpu);
53a5960a	247	target_ulong args;
f296c0d1	248	target_ulong arg0, arg1, arg2, arg3;
a4f81979 FB	249	char * s;
	250	int nr;
	251	uint32_t ret;
8e71621f PB	252	uint32_t len;
8e71621f PB	253	#ifdef CONFIG_USER_ONLY
0429a971	254	TaskState *ts = cs->opaque;
8e71621f	255	#else
81926f47	256	CPUARMState *ts = env;
8e71621f	257	#endif
a4f81979	258
faacc041 PM	259	if (is_a64(env)) {
	260	/* Note that the syscall number is in W0, not X0 */
	261	nr = env->xregs[0] & 0xffffffffU;
	262	args = env->xregs[1];
	263	} else {
	264	nr = env->regs[0];
	265	args = env->regs[1];
	266	}
	267
a4f81979	268	switch (nr) {
3881725c	269	case TARGET_SYS_OPEN:
f296c0d1 PM	270	GET_ARG(0);
	271	GET_ARG(1);
	272	GET_ARG(2);
	273	s = lock_user_string(arg0);
	274	if (!s) {
579a97f7 FB	275	/* FIXME - should this error code be -TARGET_EFAULT ? */
579a97f7 FB	276	return (uint32_t)-1;
f296c0d1 PM	277	}
	278	if (arg1 >= 12) {
	279	unlock_user(s, arg0, 0);
579a97f7	280	return (uint32_t)-1;
396bef4b	281	}
a4f81979	282	if (strcmp(s, ":tt") == 0) {
f296c0d1 PM	283	int result_fileno = arg1 < 4 ? STDIN_FILENO : STDOUT_FILENO;
f296c0d1 PM	284	unlock_user(s, arg0, 0);
396bef4b	285	return result_fileno;
a4f81979	286	}
a2d1ebaf	287	if (use_gdb_syscalls()) {
bb19cbc9 PM	288	ret = arm_gdb_syscall(cpu, arm_semi_cb, "open,%s,%x,1a4", arg0,
bb19cbc9 PM	289	(int)arg2+1, gdb_open_modeflags[arg1]);
a2d1ebaf	290	} else {
f296c0d1	291	ret = set_swi_errno(ts, open(s, open_modeflags[arg1], 0644));
a2d1ebaf	292	}
f296c0d1	293	unlock_user(s, arg0, 0);
8e71621f	294	return ret;
3881725c	295	case TARGET_SYS_CLOSE:
f296c0d1	296	GET_ARG(0);
a2d1ebaf	297	if (use_gdb_syscalls()) {
bb19cbc9	298	return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", arg0);
a2d1ebaf	299	} else {
f296c0d1	300	return set_swi_errno(ts, close(arg0));
a2d1ebaf	301	}
3881725c	302	case TARGET_SYS_WRITEC:
53a5960a	303	{
2f619698 FB	304	char c;
	305
	306	if (get_user_u8(c, args))
	307	/* FIXME - should this error code be -TARGET_EFAULT ? */
	308	return (uint32_t)-1;
53a5960a	309	/* Write to debug console. stderr is near enough. */
a2d1ebaf	310	if (use_gdb_syscalls()) {
bb19cbc9	311	return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,1", args);
a2d1ebaf PB	312	} else {
	313	return write(STDERR_FILENO, &c, 1);
	314	}
53a5960a	315	}
3881725c	316	case TARGET_SYS_WRITE0:
579a97f7 FB	317	if (!(s = lock_user_string(args)))
	318	/* FIXME - should this error code be -TARGET_EFAULT ? */
	319	return (uint32_t)-1;
a2d1ebaf PB	320	len = strlen(s);
a2d1ebaf PB	321	if (use_gdb_syscalls()) {
bb19cbc9 PM	322	return arm_gdb_syscall(cpu, arm_semi_cb, "write,2,%x,%x",
bb19cbc9 PM	323	args, len);
a2d1ebaf PB	324	} else {
	325	ret = write(STDERR_FILENO, s, len);
	326	}
53a5960a PB	327	unlock_user(s, args, 0);
53a5960a PB	328	return ret;
3881725c	329	case TARGET_SYS_WRITE:
f296c0d1 PM	330	GET_ARG(0);
	331	GET_ARG(1);
	332	GET_ARG(2);
	333	len = arg2;
a2d1ebaf PB	334	if (use_gdb_syscalls()) {
a2d1ebaf PB	335	arm_semi_syscall_len = len;
bb19cbc9 PM	336	return arm_gdb_syscall(cpu, arm_semi_cb, "write,%x,%x,%x",
bb19cbc9 PM	337	arg0, arg1, len);
a2d1ebaf	338	} else {
f296c0d1 PM	339	s = lock_user(VERIFY_READ, arg1, len, 1);
f296c0d1 PM	340	if (!s) {
579a97f7 FB	341	/* FIXME - should this error code be -TARGET_EFAULT ? */
579a97f7 FB	342	return (uint32_t)-1;
f296c0d1 PM	343	}
	344	ret = set_swi_errno(ts, write(arg0, s, len));
	345	unlock_user(s, arg1, 0);
a2d1ebaf PB	346	if (ret == (uint32_t)-1)
	347	return -1;
	348	return len - ret;
	349	}
3881725c	350	case TARGET_SYS_READ:
f296c0d1 PM	351	GET_ARG(0);
	352	GET_ARG(1);
	353	GET_ARG(2);
	354	len = arg2;
a2d1ebaf PB	355	if (use_gdb_syscalls()) {
a2d1ebaf PB	356	arm_semi_syscall_len = len;
bb19cbc9 PM	357	return arm_gdb_syscall(cpu, arm_semi_cb, "read,%x,%x,%x",
bb19cbc9 PM	358	arg0, arg1, len);
a2d1ebaf	359	} else {
f296c0d1 PM	360	s = lock_user(VERIFY_WRITE, arg1, len, 0);
f296c0d1 PM	361	if (!s) {
579a97f7 FB	362	/* FIXME - should this error code be -TARGET_EFAULT ? */
579a97f7 FB	363	return (uint32_t)-1;
f296c0d1 PM	364	}
	365	do {
	366	ret = set_swi_errno(ts, read(arg0, s, len));
	367	} while (ret == -1 && errno == EINTR);
	368	unlock_user(s, arg1, len);
a2d1ebaf PB	369	if (ret == (uint32_t)-1)
	370	return -1;
	371	return len - ret;
	372	}
3881725c	373	case TARGET_SYS_READC:
b90372ad	374	/* XXX: Read from debug console. Not implemented. */
a4f81979	375	return 0;
3881725c	376	case TARGET_SYS_ISTTY:
f296c0d1	377	GET_ARG(0);
a2d1ebaf	378	if (use_gdb_syscalls()) {
bb19cbc9	379	return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", arg0);
a2d1ebaf	380	} else {
f296c0d1	381	return isatty(arg0);
a2d1ebaf	382	}
3881725c	383	case TARGET_SYS_SEEK:
f296c0d1 PM	384	GET_ARG(0);
f296c0d1 PM	385	GET_ARG(1);
a2d1ebaf	386	if (use_gdb_syscalls()) {
bb19cbc9 PM	387	return arm_gdb_syscall(cpu, arm_semi_cb, "lseek,%x,%x,0",
bb19cbc9 PM	388	arg0, arg1);
a2d1ebaf	389	} else {
f296c0d1	390	ret = set_swi_errno(ts, lseek(arg0, arg1, SEEK_SET));
a2d1ebaf PB	391	if (ret == (uint32_t)-1)
	392	return -1;
	393	return 0;
	394	}
3881725c	395	case TARGET_SYS_FLEN:
f296c0d1	396	GET_ARG(0);
a2d1ebaf	397	if (use_gdb_syscalls()) {
bb19cbc9	398	return arm_gdb_syscall(cpu, arm_semi_flen_cb, "fstat,%x,%x",
faacc041	399	arg0, arm_flen_buf(cpu));
a2d1ebaf	400	} else {
a4f81979	401	struct stat buf;
f296c0d1	402	ret = set_swi_errno(ts, fstat(arg0, &buf));
a4f81979 FB	403	if (ret == (uint32_t)-1)
	404	return -1;
	405	return buf.st_size;
	406	}
3881725c	407	case TARGET_SYS_TMPNAM:
a4f81979 FB	408	/* XXX: Not implemented. */
a4f81979 FB	409	return -1;
3881725c	410	case TARGET_SYS_REMOVE:
f296c0d1 PM	411	GET_ARG(0);
f296c0d1 PM	412	GET_ARG(1);
a2d1ebaf	413	if (use_gdb_syscalls()) {
bb19cbc9 PM	414	ret = arm_gdb_syscall(cpu, arm_semi_cb, "unlink,%s",
bb19cbc9 PM	415	arg0, (int)arg1+1);
a2d1ebaf	416	} else {
f296c0d1 PM	417	s = lock_user_string(arg0);
f296c0d1 PM	418	if (!s) {
579a97f7 FB	419	/* FIXME - should this error code be -TARGET_EFAULT ? */
579a97f7 FB	420	return (uint32_t)-1;
f296c0d1	421	}
a2d1ebaf	422	ret = set_swi_errno(ts, remove(s));
f296c0d1	423	unlock_user(s, arg0, 0);
a2d1ebaf	424	}
8e71621f	425	return ret;
3881725c	426	case TARGET_SYS_RENAME:
f296c0d1 PM	427	GET_ARG(0);
	428	GET_ARG(1);
	429	GET_ARG(2);
	430	GET_ARG(3);
a2d1ebaf	431	if (use_gdb_syscalls()) {
bb19cbc9 PM	432	return arm_gdb_syscall(cpu, arm_semi_cb, "rename,%s,%s",
bb19cbc9 PM	433	arg0, (int)arg1+1, arg2, (int)arg3+1);
a2d1ebaf	434	} else {
8e71621f	435	char *s2;
f296c0d1 PM	436	s = lock_user_string(arg0);
f296c0d1 PM	437	s2 = lock_user_string(arg2);
579a97f7 FB	438	if (!s \|\| !s2)
	439	/* FIXME - should this error code be -TARGET_EFAULT ? */
	440	ret = (uint32_t)-1;
	441	else
	442	ret = set_swi_errno(ts, rename(s, s2));
	443	if (s2)
f296c0d1	444	unlock_user(s2, arg2, 0);
579a97f7	445	if (s)
f296c0d1	446	unlock_user(s, arg0, 0);
8e71621f PB	447	return ret;
8e71621f PB	448	}
3881725c	449	case TARGET_SYS_CLOCK:
a4f81979	450	return clock() / (CLOCKS_PER_SEC / 100);
3881725c	451	case TARGET_SYS_TIME:
a4f81979	452	return set_swi_errno(ts, time(NULL));
3881725c	453	case TARGET_SYS_SYSTEM:
f296c0d1 PM	454	GET_ARG(0);
f296c0d1 PM	455	GET_ARG(1);
a2d1ebaf	456	if (use_gdb_syscalls()) {
bb19cbc9 PM	457	return arm_gdb_syscall(cpu, arm_semi_cb, "system,%s",
bb19cbc9 PM	458	arg0, (int)arg1+1);
a2d1ebaf	459	} else {
f296c0d1 PM	460	s = lock_user_string(arg0);
f296c0d1 PM	461	if (!s) {
579a97f7 FB	462	/* FIXME - should this error code be -TARGET_EFAULT ? */
579a97f7 FB	463	return (uint32_t)-1;
f296c0d1	464	}
a2d1ebaf	465	ret = set_swi_errno(ts, system(s));
f296c0d1	466	unlock_user(s, arg0, 0);
a982b531	467	return ret;
a2d1ebaf	468	}
3881725c	469	case TARGET_SYS_ERRNO:
8e71621f	470	#ifdef CONFIG_USER_ONLY
a4f81979	471	return ts->swi_errno;
8e71621f	472	#else
33d9cc8a	473	return syscall_err;
8e71621f	474	#endif
3881725c	475	case TARGET_SYS_GET_CMDLINE:
38d0662a	476	{
1c1b40c1 CV	477	/* Build a command-line from the original argv.
	478	*
	479	* The inputs are:
f296c0d1 PM	480	* * arg0, pointer to a buffer of at least the size
	481	* specified in arg1.
	482	* * arg1, size of the buffer pointed to by arg0 in
1c1b40c1 CV	483	* bytes.
	484	*
	485	* The outputs are:
f296c0d1	486	* * arg0, pointer to null-terminated string of the
1c1b40c1	487	* command line.
f296c0d1	488	* * arg1, length of the string pointed to by arg0.
1c1b40c1	489	*/
579a97f7	490
1c1b40c1	491	char *output_buffer;
f296c0d1	492	size_t input_size;
1c1b40c1 CV	493	size_t output_size;
1c1b40c1 CV	494	int status = 0;
f3c2bda2 LI	495	#if !defined(CONFIG_USER_ONLY)
	496	const char *cmdline;
	497	#endif
f296c0d1 PM	498	GET_ARG(0);
	499	GET_ARG(1);
	500	input_size = arg1;
1c1b40c1 CV	501	/* Compute the size of the output string. */
1c1b40c1 CV	502	#if !defined(CONFIG_USER_ONLY)
f3c2bda2 LI	503	cmdline = semihosting_get_cmdline();
	504	if (cmdline == NULL) {
	505	cmdline = ""; /* Default to an empty line. */
	506	}
	507	output_size = strlen(cmdline) + 1; /* Count terminating 0. */
1c1b40c1 CV	508	#else
1c1b40c1 CV	509	unsigned int i;
38d0662a	510
1c1b40c1 CV	511	output_size = ts->info->arg_end - ts->info->arg_start;
1c1b40c1 CV	512	if (!output_size) {
2e8785ac WS	513	/* We special-case the "empty command line" case (argc==0).
2e8785ac WS	514	Just provide the terminating 0. */
1c1b40c1 CV	515	output_size = 1;
	516	}
	517	#endif
38d0662a	518
1c1b40c1 CV	519	if (output_size > input_size) {
	520	/* Not enough space to store command-line arguments. */
	521	return -1;
38d0662a	522	}
38d0662a	523
1c1b40c1	524	/* Adjust the command-line length. */
f296c0d1 PM	525	if (SET_ARG(1, output_size - 1)) {
	526	/* Couldn't write back to argument block */
	527	return -1;
	528	}
38d0662a	529
1c1b40c1	530	/* Lock the buffer on the ARM side. */
f296c0d1	531	output_buffer = lock_user(VERIFY_WRITE, arg0, output_size, 0);
1c1b40c1 CV	532	if (!output_buffer) {
	533	return -1;
	534	}
38d0662a	535
1c1b40c1 CV	536	/* Copy the command-line arguments. */
1c1b40c1 CV	537	#if !defined(CONFIG_USER_ONLY)
f3c2bda2	538	pstrcpy(output_buffer, output_size, cmdline);
1c1b40c1 CV	539	#else
	540	if (output_size == 1) {
	541	/* Empty command-line. */
	542	output_buffer[0] = '\0';
	543	goto out;
	544	}
2e8785ac	545
1c1b40c1 CV	546	if (copy_from_user(output_buffer, ts->info->arg_start,
	547	output_size)) {
	548	status = -1;
	549	goto out;
2e8785ac WS	550	}
2e8785ac WS	551
1c1b40c1 CV	552	/* Separate arguments by white spaces. */
	553	for (i = 0; i < output_size - 1; i++) {
	554	if (output_buffer[i] == 0) {
	555	output_buffer[i] = ' ';
	556	}
	557	}
	558	out:
	559	#endif
	560	/* Unlock the buffer on the ARM side. */
f296c0d1	561	unlock_user(output_buffer, arg0, output_size);
2e8785ac	562
1c1b40c1	563	return status;
38d0662a	564	}
3881725c	565	case TARGET_SYS_HEAPINFO:
a4f81979	566	{
f5666418	567	target_ulong retvals[4];
90e26f5a	568	target_ulong limit;
f5666418 PM	569	int i;
f5666418 PM	570
f296c0d1	571	GET_ARG(0);
a4f81979	572
8e71621f PB	573	#ifdef CONFIG_USER_ONLY
8e71621f PB	574	/* Some C libraries assume the heap immediately follows .bss, so
a4f81979 FB	575	allocate it using sbrk. */
a4f81979 FB	576	if (!ts->heap_limit) {
206ae74a	577	abi_ulong ret;
a4f81979	578
53a5960a	579	ts->heap_base = do_brk(0);
a4f81979 FB	580	limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
	581	/* Try a big heap, and reduce the size if that fails. */
	582	for (;;) {
53a5960a	583	ret = do_brk(limit);
206ae74a	584	if (ret >= limit) {
a4f81979	585	break;
206ae74a	586	}
a4f81979 FB	587	limit = (ts->heap_base >> 1) + (limit >> 1);
	588	}
	589	ts->heap_limit = limit;
	590	}
3b46e624	591
f5666418 PM	592	retvals[0] = ts->heap_base;
	593	retvals[1] = ts->heap_limit;
	594	retvals[2] = ts->stack_base;
	595	retvals[3] = 0; /* Stack limit. */
8e71621f PB	596	#else
8e71621f PB	597	limit = ram_size;
8e71621f	598	/* TODO: Make this use the limit of the loaded application. */
f5666418 PM	599	retvals[0] = limit / 2;
	600	retvals[1] = limit;
	601	retvals[2] = limit; /* Stack base */
	602	retvals[3] = 0; /* Stack limit. */
8e71621f	603	#endif
f5666418 PM	604
	605	for (i = 0; i < ARRAY_SIZE(retvals); i++) {
	606	bool fail;
	607
	608	if (is_a64(env)) {
	609	fail = put_user_u64(retvals[i], arg0 + i * 8);
	610	} else {
	611	fail = put_user_u32(retvals[i], arg0 + i * 4);
	612	}
	613
	614	if (fail) {
	615	/* Couldn't write back to argument block */
	616	return -1;
	617	}
	618	}
a4f81979 FB	619	return 0;
a4f81979 FB	620	}
3881725c	621	case TARGET_SYS_EXIT:
7446d35e PM	622	if (is_a64(env)) {
	623	/* The A64 version of this call takes a parameter block,
	624	* so the application-exit type can return a subcode which
	625	* is the exit status code from the application.
	626	*/
	627	GET_ARG(0);
	628	GET_ARG(1);
	629
	630	if (arg0 == ADP_Stopped_ApplicationExit) {
	631	ret = arg1;
	632	} else {
	633	ret = 1;
	634	}
	635	} else {
	636	/* ARM specifies only Stopped_ApplicationExit as normal
	637	* exit, everything else is considered an error */
	638	ret = (args == ADP_Stopped_ApplicationExit) ? 0 : 1;
	639	}
1ecc3a2d LI	640	gdb_exit(env, ret);
1ecc3a2d LI	641	exit(ret);
e9ebfbfc PM	642	case TARGET_SYS_SYNCCACHE:
	643	/* Clean the D-cache and invalidate the I-cache for the specified
	644	* virtual address range. This is a nop for us since we don't
	645	* implement caches. This is only present on A64.
	646	*/
	647	if (is_a64(env)) {
	648	return 0;
	649	}
	650	/* fall through -- invalid for A32/T32 */
a4f81979 FB	651	default:
a4f81979 FB	652	fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
0429a971	653	cpu_dump_state(cs, stderr, fprintf, 0);
a4f81979 FB	654	abort();
	655	}
	656	}