root / m68k-semi.c @ 579a97f7
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/*
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* m68k/ColdFire Semihosting syscall interface
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*
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* Copyright (c) 2005-2007 CodeSourcery.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <sys/time.h> |
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#include <time.h> |
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#include "cpu.h" |
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#if defined(CONFIG_USER_ONLY)
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#include "qemu.h" |
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#define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024) |
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#else
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#include "vl.h" |
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#include "softmmu-semi.h" |
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#endif
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#define HOSTED_EXIT 0 |
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#define HOSTED_INIT_SIM 1 |
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#define HOSTED_OPEN 2 |
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#define HOSTED_CLOSE 3 |
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#define HOSTED_READ 4 |
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#define HOSTED_WRITE 5 |
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#define HOSTED_LSEEK 6 |
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#define HOSTED_RENAME 7 |
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#define HOSTED_UNLINK 8 |
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#define HOSTED_STAT 9 |
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#define HOSTED_FSTAT 10 |
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#define HOSTED_GETTIMEOFDAY 11 |
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#define HOSTED_ISATTY 12 |
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#define HOSTED_SYSTEM 13 |
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typedef uint32_t gdb_mode_t;
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typedef uint32_t gdb_time_t;
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struct m68k_gdb_stat {
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uint32_t gdb_st_dev; /* device */
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uint32_t gdb_st_ino; /* inode */
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gdb_mode_t gdb_st_mode; /* protection */
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uint32_t gdb_st_nlink; /* number of hard links */
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uint32_t gdb_st_uid; /* user ID of owner */
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uint32_t gdb_st_gid; /* group ID of owner */
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uint32_t gdb_st_rdev; /* device type (if inode device) */
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uint64_t gdb_st_size; /* total size, in bytes */
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uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
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uint64_t gdb_st_blocks; /* number of blocks allocated */
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gdb_time_t gdb_st_atime; /* time of last access */
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gdb_time_t gdb_st_mtime; /* time of last modification */
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gdb_time_t gdb_st_ctime; /* time of last change */
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} __attribute__((packed)); |
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struct gdb_timeval {
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gdb_time_t tv_sec; /* second */
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uint64_t tv_usec; /* microsecond */
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} __attribute__((packed)); |
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#define GDB_O_RDONLY 0x0 |
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#define GDB_O_WRONLY 0x1 |
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#define GDB_O_RDWR 0x2 |
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#define GDB_O_APPEND 0x8 |
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#define GDB_O_CREAT 0x200 |
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#define GDB_O_TRUNC 0x400 |
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#define GDB_O_EXCL 0x800 |
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static int translate_openflags(int flags) |
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{
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int hf;
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if (flags & GDB_O_WRONLY)
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hf = O_WRONLY; |
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else if (flags & GDB_O_RDWR) |
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hf = O_RDWR; |
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else
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hf = O_RDONLY; |
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if (flags & GDB_O_APPEND) hf |= O_APPEND;
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if (flags & GDB_O_CREAT) hf |= O_CREAT;
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if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
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if (flags & GDB_O_EXCL) hf |= O_EXCL;
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return hf;
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} |
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static void translate_stat(CPUState *env, target_ulong addr, struct stat *s) |
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{
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struct m68k_gdb_stat *p;
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if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0))) |
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/* FIXME - should this return an error code? */
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return;
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p->gdb_st_dev = cpu_to_be32(s->st_dev); |
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p->gdb_st_ino = cpu_to_be32(s->st_ino); |
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p->gdb_st_mode = cpu_to_be32(s->st_mode); |
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p->gdb_st_nlink = cpu_to_be32(s->st_nlink); |
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p->gdb_st_uid = cpu_to_be32(s->st_uid); |
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p->gdb_st_gid = cpu_to_be32(s->st_gid); |
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p->gdb_st_rdev = cpu_to_be32(s->st_rdev); |
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p->gdb_st_size = cpu_to_be64(s->st_size); |
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#ifdef _WIN32
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/* Windows stat is missing some fields. */
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p->gdb_st_blksize = 0;
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p->gdb_st_blocks = 0;
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#else
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p->gdb_st_blksize = cpu_to_be64(s->st_blksize); |
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p->gdb_st_blocks = cpu_to_be64(s->st_blocks); |
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#endif
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p->gdb_st_atime = cpu_to_be32(s->st_atime); |
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p->gdb_st_mtime = cpu_to_be32(s->st_mtime); |
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p->gdb_st_ctime = cpu_to_be32(s->st_ctime); |
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unlock_user(p, addr, sizeof(struct m68k_gdb_stat)); |
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} |
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static int m68k_semi_is_fseek; |
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static void m68k_semi_cb(CPUState *env, target_ulong ret, target_ulong err) |
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{
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target_ulong args; |
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args = env->dregs[1];
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if (m68k_semi_is_fseek) {
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/* FIXME: We've already lost the high bits of the fseek
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return value. */
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tput32(args, 0);
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args += 4;
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m68k_semi_is_fseek = 0;
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} |
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tput32(args, ret); |
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tput32(args + 4, errno);
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} |
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#define ARG(x) tget32(args + (x) * 4) |
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#define PARG(x) ((unsigned long)ARG(x)) |
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void do_m68k_semihosting(CPUM68KState *env, int nr) |
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{
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uint32_t args; |
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void *p;
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void *q;
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uint32_t len; |
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uint32_t result; |
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args = env->dregs[1];
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switch (nr) {
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case HOSTED_EXIT:
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exit(env->dregs[0]);
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case HOSTED_OPEN:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", ARG(0), (int)ARG(1), |
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ARG(2), ARG(3)); |
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return;
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} else {
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if (!(p = lock_user_string(ARG(0)))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = open(p, translate_openflags(ARG(2)), ARG(3)); |
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unlock_user(p, ARG(0), 0); |
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} |
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} |
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break;
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case HOSTED_CLOSE:
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{
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/* Ignore attempts to close stdin/out/err. */
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int fd = ARG(0); |
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if (fd > 2) { |
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "close,%x", ARG(0)); |
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return;
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} else {
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result = close(fd); |
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} |
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} else {
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result = 0;
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} |
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break;
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} |
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case HOSTED_READ:
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len = ARG(2);
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
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ARG(0), ARG(1), len); |
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return;
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} else {
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if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = read(ARG(0), p, len);
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unlock_user(p, ARG(1), len);
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} |
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} |
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break;
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case HOSTED_WRITE:
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len = ARG(2);
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
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ARG(0), ARG(1), len); |
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return;
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} else {
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if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = write(ARG(0), p, len);
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unlock_user(p, ARG(0), 0); |
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} |
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} |
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break;
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case HOSTED_LSEEK:
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{
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uint64_t off; |
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off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32); |
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if (use_gdb_syscalls()) {
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m68k_semi_is_fseek = 1;
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gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
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ARG(0), off, ARG(3)); |
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} else {
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off = lseek(ARG(0), off, ARG(3)); |
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tput32(args, off >> 32);
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tput32(args + 4, off);
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tput32(args + 8, errno);
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} |
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return;
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} |
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case HOSTED_RENAME:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
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ARG(0), (int)ARG(1), ARG(2), (int)ARG(3)); |
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return;
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} else {
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p = lock_user_string(ARG(0));
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q = lock_user_string(ARG(2));
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if (!p || !q) {
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = rename(p, q); |
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} |
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unlock_user(p, ARG(0), 0); |
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unlock_user(q, ARG(2), 0); |
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} |
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break;
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case HOSTED_UNLINK:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "unlink,%s",
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ARG(0), (int)ARG(1)); |
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return;
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} else {
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if (!(p = lock_user_string(ARG(0)))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = unlink(p); |
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unlock_user(p, ARG(0), 0); |
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} |
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} |
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break;
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case HOSTED_STAT:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
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ARG(0), (int)ARG(1), ARG(2)); |
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return;
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} else {
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struct stat s;
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if (!(p = lock_user_string(ARG(0)))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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result = stat(p, &s); |
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unlock_user(p, ARG(0), 0); |
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} |
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if (result == 0) { |
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translate_stat(env, ARG(2), &s);
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} |
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} |
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break;
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case HOSTED_FSTAT:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
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ARG(0), ARG(1)); |
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return;
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} else {
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struct stat s;
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result = fstat(ARG(0), &s);
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if (result == 0) { |
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translate_stat(env, ARG(1), &s);
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} |
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} |
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break;
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case HOSTED_GETTIMEOFDAY:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
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ARG(0), ARG(1)); |
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return;
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} else {
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qemu_timeval tv; |
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struct gdb_timeval *p;
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result = qemu_gettimeofday(&tv); |
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if (result != 0) { |
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if (!(p = lock_user(VERIFY_WRITE,
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ARG(0), sizeof(struct gdb_timeval), 0))) { |
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/* FIXME - check error code? */
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result = -1;
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} else {
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p->tv_sec = cpu_to_be32(tv.tv_sec); |
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p->tv_usec = cpu_to_be64(tv.tv_usec); |
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unlock_user(p, ARG(0), sizeof(struct gdb_timeval)); |
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} |
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} |
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} |
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break;
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case HOSTED_ISATTY:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "isatty,%x", ARG(0)); |
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return;
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} else {
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result = isatty(ARG(0));
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} |
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break;
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case HOSTED_SYSTEM:
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if (use_gdb_syscalls()) {
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gdb_do_syscall(m68k_semi_cb, "system,%s",
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ARG(0), (int)ARG(1)); |
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return;
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} else {
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if (!(p = lock_user_string(ARG(0)))) { |
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/* FIXME - check error code? */
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result = -1;
|
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} else {
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result = system(p); |
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unlock_user(p, ARG(0), 0); |
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} |
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} |
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break;
|
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case HOSTED_INIT_SIM:
|
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#if defined(CONFIG_USER_ONLY)
|
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{
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TaskState *ts = env->opaque; |
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/* Allocate the heap using sbrk. */
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if (!ts->heap_limit) {
|
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long ret;
|
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uint32_t size; |
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uint32_t base; |
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|
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base = do_brk(0);
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size = SEMIHOSTING_HEAP_SIZE; |
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/* Try a big heap, and reduce the size if that fails. */
|
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for (;;) {
|
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ret = do_brk(base + size); |
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if (ret != -1) |
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break;
|
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size >>= 1;
|
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} |
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ts->heap_limit = base + size; |
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} |
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/* This call may happen before we have writable memory, so return
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values directly in registers. */
|
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env->dregs[1] = ts->heap_limit;
|
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env->aregs[7] = ts->stack_base;
|
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} |
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#else
|
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/* FIXME: This is wrong for boards where RAM does not start at
|
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address zero. */
|
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env->dregs[1] = ram_size;
|
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env->aregs[7] = ram_size;
|
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#endif
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return;
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default:
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cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
|
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result = 0;
|
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} |
| 393 |
tput32(args, result); |
| 394 |
tput32(args + 4, errno);
|
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} |