diff options
Diffstat (limited to 'linux-user/m68k-semi.c')
| -rw-r--r-- | linux-user/m68k-semi.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/linux-user/m68k-semi.c b/linux-user/m68k-semi.c new file mode 100644 index 0000000000..7f6dddaee4 --- /dev/null +++ b/linux-user/m68k-semi.c @@ -0,0 +1,216 @@ +/* + * m68k/ColdFire Semihosting ssycall interface + * + * Copyright (c) 2005 CodeSourcery, LLC. 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 <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <sys/time.h> +#include <time.h> + +#include "qemu.h" + +#define HOSTED_EXIT 0 +#define HOSTED_PUTCHAR 1 /* Obsolete */ +#define HOSTED_OPEN 2 +#define HOSTED_CLOSE 3 +#define HOSTED_READ 4 +#define HOSTED_WRITE 5 +#define HOSTED_LSEEK 6 +#define HOSTED_RENAME 7 +#define HOSTED_UNLINK 8 +#define HOSTED_STAT 9 +#define HOSTED_FSTAT 10 +#define HOSTED_GETTIMEOFDAY 11 +#define HOSTED_ISATTY 12 +#define HOSTED_SYSTEM 13 + +typedef uint32_t gdb_mode_t; +typedef uint32_t gdb_time_t; + +struct m68k_gdb_stat { + uint32_t gdb_st_dev; /* device */ + uint32_t gdb_st_ino; /* inode */ + gdb_mode_t gdb_st_mode; /* protection */ + uint32_t gdb_st_nlink; /* number of hard links */ + uint32_t gdb_st_uid; /* user ID of owner */ + uint32_t gdb_st_gid; /* group ID of owner */ + uint32_t gdb_st_rdev; /* device type (if inode device) */ + uint64_t gdb_st_size; /* total size, in bytes */ + uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */ + uint64_t gdb_st_blocks; /* number of blocks allocated */ + gdb_time_t gdb_st_atime; /* time of last access */ + gdb_time_t gdb_st_mtime; /* time of last modification */ + gdb_time_t gdb_st_ctime; /* time of last change */ +}; + +struct gdb_timeval { + gdb_time_t tv_sec; /* second */ + uint64_t tv_usec; /* microsecond */ +}; + +#define GDB_O_RDONLY 0x0 +#define GDB_O_WRONLY 0x1 +#define GDB_O_RDWR 0x2 +#define GDB_O_APPEND 0x8 +#define GDB_O_CREAT 0x200 +#define GDB_O_TRUNC 0x400 +#define GDB_O_EXCL 0x800 + +static int translate_openflags(int flags) +{ + int hf; + + if (flags & GDB_O_WRONLY) + hf = O_WRONLY; + else if (flags & GDB_O_RDWR) + hf = O_RDWR; + else + hf = O_RDONLY; + + if (flags & GDB_O_APPEND) hf |= O_APPEND; + if (flags & GDB_O_CREAT) hf |= O_CREAT; + if (flags & GDB_O_TRUNC) hf |= O_TRUNC; + if (flags & GDB_O_EXCL) hf |= O_EXCL; + + return hf; +} + +static void translate_stat(struct m68k_gdb_stat *p, struct stat *s) +{ + p->gdb_st_dev = tswap16(s->st_dev); + p->gdb_st_ino = tswap16(s->st_ino); + p->gdb_st_mode = tswap32(s->st_mode); + p->gdb_st_nlink = tswap16(s->st_nlink); + p->gdb_st_uid = tswap16(s->st_uid); + p->gdb_st_gid = tswap16(s->st_gid); + p->gdb_st_rdev = tswap16(s->st_rdev); + p->gdb_st_size = tswap32(s->st_size); + p->gdb_st_atime = tswap32(s->st_atime); + p->gdb_st_mtime = tswap32(s->st_mtime); + p->gdb_st_ctime = tswap32(s->st_ctime); + p->gdb_st_blksize = tswap32(s->st_blksize); + p->gdb_st_blocks = tswap32(s->st_blocks); +} + +static inline uint32_t check_err(CPUM68KState *env, uint32_t code) +{ + if (code == (uint32_t)-1) { + env->sr |= CCF_C; + } else { + env->sr &= ~CCF_C; + env->dregs[0] = code; + } + return code; +} + +#define ARG(x) tswap32(args[x]) +void do_m68k_semihosting(CPUM68KState *env, int nr) +{ + uint32_t *args; + + args = (uint32_t *)env->dregs[1]; + switch (nr) { + case HOSTED_EXIT: + exit(env->dregs[0]); + case HOSTED_OPEN: + /* Assume name is NULL terminated. */ + check_err(env, open((char *)ARG(0), translate_openflags(ARG(2)), + ARG(3))); + break; + case HOSTED_CLOSE: + { + /* Ignore attempts to close stdin/out/err. */ + int fd = ARG(0); + if (fd > 2) + check_err(env, close(fd)); + else + check_err(env, 0); + break; + } + case HOSTED_READ: + check_err(env, read(ARG(0), (void *)ARG(1), ARG(2))); + break; + case HOSTED_WRITE: + check_err(env, write(ARG(0), (void *)ARG(1), ARG(2))); + break; + case HOSTED_LSEEK: + { + uint64_t off; + off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32); + check_err(env, lseek(ARG(0), off, ARG(3))); + } + break; + case HOSTED_RENAME: + /* Assume names are NULL terminated. */ + check_err(env, rename((char *)ARG(0), (char *)ARG(2))); + break; + case HOSTED_UNLINK: + /* Assume name is NULL terminated. */ + check_err(env, unlink((char *)ARG(0))); + break; + case HOSTED_STAT: + /* Assume name is NULL terminated. */ + { + struct stat s; + int rc; + rc = check_err(env, stat((char *)ARG(0), &s)); + if (rc == 0) { + translate_stat((struct m68k_gdb_stat *)ARG(2), &s); + } + } + break; + case HOSTED_FSTAT: + { + struct stat s; + int rc; + rc = check_err(env, fstat(ARG(0), &s)); + if (rc == 0) { + translate_stat((struct m68k_gdb_stat *)ARG(1), &s); + } + } + break; + case HOSTED_GETTIMEOFDAY: + { + struct timeval tv; + struct gdb_timeval *p; + int rc; + rc = check_err(env, gettimeofday(&tv, NULL)); + if (rc != 0) { + p = (struct gdb_timeval *)ARG(0); + p->tv_sec = tswap32(tv.tv_sec); + p->tv_usec = tswap64(tv.tv_usec); + } + } + break; + case HOSTED_ISATTY: + check_err(env, isatty(ARG(0))); + break; + case HOSTED_SYSTEM: + /* Assume name is NULL terminated. */ + check_err(env, system((char *)ARG(0))); + break; + default: + cpu_abort(env, "Unsupported semihosting syscall %d\n", nr); + } +} |