--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/arm-semi.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,475 @@
+/*
+ * 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 = uninterrupted_open(s, open_modeflags[ARG(1)], 0644);
+ ret = set_swi_errno(ts, ret);
+ }
+ 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, uninterrupted_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 {
+ ret = uninterrupted_write(STDERR_FILENO, &c, 1);
+ return set_swi_errno(ts, ret);
+ }
+ }
+ 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 = uninterrupted_write(STDERR_FILENO, s, len);
+ ret = set_swi_errno(ts, ret);
+ }
+ 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, uninterrupted_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;
+ ret = set_swi_errno(ts, uninterrupted_read(ARG(0), s, len));
+ 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:
+ /* FIXME: ideally we want to inform gdb about program
+ exit whenever gdb is connected, even if syscalls
+ are not handled by gdb. */
+ if (use_gdb_syscalls())
+ gdb_exit(env, 0);
+ exit(0);
+ default:
+ fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
+ cpu_dump_state(env, stderr, fprintf, 0);
+ abort();
+ }
+}