--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/ppc-semi.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,483 @@
+/*
+ * PowerPC Semihosting syscall interface.
+ * Implements a subset of NetBSD syscalls.
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ *
+ * 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 "cpu.h"
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "gdbstub.h"
+#include "softmmu-semi.h"
+
+#define HOSTED_EXIT 1
+#define HOSTED_READ 3
+#define HOSTED_WRITE 4
+#define HOSTED_OPEN 5
+#define HOSTED_CLOSE 6
+#define HOSTED_UNLINK 10
+#define HOSTED_BRK 17
+#define HOSTED_ACCESS 33
+#define HOSTED_DUP 41
+/* This is not quite right: 54 is ioctl, but the only thing we use ioctl
+ for right now is to implement isatty. Their argument lists are
+ compatible as far as the first argument goes, so we just fake it and
+ declare ioctl's syscall number as isatty's. */
+#define HOSTED_ISATTY 54
+#define HOSTED_SYSTEM 77 /* obsolete vlimit */
+#define HOSTED_GETTIMEOFDAY 116
+#define HOSTED_RENAME 128
+#define HOSTED_LSEEK 199
+#define HOSTED_STAT 387
+#define HOSTED_FSTAT 388
+
+typedef uint32_t gdb_mode_t;
+typedef uint32_t gdb_time_t;
+
+struct ppc_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 */
+} __attribute__((packed));
+
+struct ppc_netbsd_stat {
+ uint32_t nbsd_st_dev; /* device */
+ uint32_t nbsd_st_mode; /* protection */
+ uint64_t nbsd_st_ino; /* inode */
+ uint32_t nbsd_st_nlink; /* number of hard links */
+ uint32_t nbsd_st_uid; /* user ID of owner */
+ uint32_t nbsd_st_gid; /* group ID of owner */
+ uint32_t nbsd_st_rdev; /* device type */
+
+ int32_t nbsd_st_atime; /* time of last access */
+ int32_t nbsd_st_atimensec;
+ int32_t nbsd_st_mtime; /* time of last modification */
+ int32_t nbsd_st_mtimensec;
+ int32_t nbsd_st_ctime; /* time of last change */
+ int32_t nbsd_st_ctimensec;
+
+ uint64_t nbsd_st_size; /* total size, in bytes */
+ int64_t nbsd_st_blocks; /* number of blocks allocated */
+ uint32_t nbsd_st_blksize; /* blocksize for filesystem I/O */
+ uint32_t nbsd_st_flags; /* user-defined flags */
+ uint32_t nbsd_st_gen; /* filesystem generation number */
+ uint32_t nbsd_st_spare[2];
+};
+
+struct gdb_timeval {
+ gdb_time_t tv_sec; /* second */
+ uint64_t tv_usec; /* microsecond */
+} __attribute__((packed));
+
+#define TARGET_O_RDONLY 0
+#define TARGET_O_WRONLY 1
+#define TARGET_O_RDWR 2
+#define TARGET_O_ACCMODE 3
+#define TARGET_O_APPEND 0x0008
+#define TARGET_O_CREAT 0x0200
+#define TARGET_O_TRUNC 0x0400
+#define TARGET_O_EXCL 0x0800
+
+#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_gdb(int flags)
+{
+ int gf;
+
+ if ((flags & TARGET_O_ACCMODE) == TARGET_O_WRONLY)
+ gf = GDB_O_WRONLY;
+ else if ((flags & TARGET_O_ACCMODE) == TARGET_O_RDWR)
+ gf = GDB_O_RDWR;
+ else
+ gf = GDB_O_RDONLY;
+
+ if (flags & TARGET_O_APPEND) gf |= GDB_O_APPEND;
+ if (flags & TARGET_O_CREAT) gf |= GDB_O_CREAT;
+ if (flags & TARGET_O_TRUNC) gf |= GDB_O_TRUNC;
+ if (flags & TARGET_O_EXCL) gf |= GDB_O_EXCL;
+
+ return gf;
+}
+
+static int translate_openflags_host(int flags)
+{
+ int hf;
+
+ if ((flags & TARGET_O_ACCMODE) == TARGET_O_WRONLY)
+ hf = O_WRONLY;
+ else if ((flags & TARGET_O_ACCMODE) == TARGET_O_RDWR)
+ hf = O_RDWR;
+ else
+ hf = O_RDONLY;
+
+ if (flags & TARGET_O_APPEND) hf |= O_APPEND;
+ if (flags & TARGET_O_CREAT) hf |= O_CREAT;
+ if (flags & TARGET_O_TRUNC) hf |= O_TRUNC;
+ if (flags & TARGET_O_EXCL) hf |= O_EXCL;
+
+ return hf;
+}
+
+static void translate_to_netbsd_stat(CPUState *env, target_ulong addr,
+ struct stat *s, target_ulong saddr)
+{
+ struct ppc_netbsd_stat *p;
+
+ if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(*p), 0)))
+ /* FIXME - should this return an error code? */
+ return;
+
+ if (s) {
+ p->nbsd_st_dev = cpu_to_be32(s->st_dev);
+ p->nbsd_st_ino = cpu_to_be64(s->st_ino);
+ p->nbsd_st_mode = cpu_to_be32(s->st_mode);
+ p->nbsd_st_nlink = cpu_to_be32(s->st_nlink);
+ p->nbsd_st_uid = cpu_to_be32(s->st_uid);
+ p->nbsd_st_gid = cpu_to_be32(s->st_gid);
+ p->nbsd_st_rdev = cpu_to_be32(s->st_rdev);
+ p->nbsd_st_size = cpu_to_be64(s->st_size);
+#ifdef _WIN32
+ /* Windows stat is missing some fields. */
+ p->nbsd_st_blksize = 0;
+ p->nbsd_st_blocks = 0;
+#else
+ p->nbsd_st_blksize = cpu_to_be32(s->st_blksize);
+ p->nbsd_st_blocks = cpu_to_be64(s->st_blocks);
+#endif
+ p->nbsd_st_atime = cpu_to_be32(s->st_atime);
+ p->nbsd_st_mtime = cpu_to_be32(s->st_mtime);
+ p->nbsd_st_ctime = cpu_to_be32(s->st_ctime);
+ } else {
+ struct ppc_gdb_stat *g;
+
+ if (g = lock_user (VERIFY_READ, saddr, sizeof(*g), 1)) {
+ p->nbsd_st_dev = cpu_to_be32(g->gdb_st_dev);
+ p->nbsd_st_ino = cpu_to_be64(g->gdb_st_ino);
+ p->nbsd_st_mode = cpu_to_be32(g->gdb_st_mode);
+ p->nbsd_st_nlink = cpu_to_be32(g->gdb_st_nlink);
+ p->nbsd_st_uid = cpu_to_be32(g->gdb_st_uid);
+ p->nbsd_st_gid = cpu_to_be32(g->gdb_st_gid);
+ p->nbsd_st_rdev = cpu_to_be32(g->gdb_st_rdev);
+ p->nbsd_st_size = cpu_to_be64(g->gdb_st_size);
+ p->nbsd_st_blksize = cpu_to_be32(g->gdb_st_blksize);
+ p->nbsd_st_blocks = cpu_to_be64(g->gdb_st_blocks);
+ p->nbsd_st_atime = cpu_to_be32(g->gdb_st_atime);
+ p->nbsd_st_mtime = cpu_to_be32(g->gdb_st_mtime);
+ p->nbsd_st_ctime = cpu_to_be32(g->gdb_st_ctime);
+
+ unlock_user (g, saddr, 0);
+ }
+ }
+
+ unlock_user(p, addr, sizeof(*p));
+}
+
+#define ARG(n) env->gpr[3 + (n)]
+
+static void ppc_semi_cb(CPUState *env, target_ulong ret, target_ulong err)
+{
+ if (ret == -1) {
+ env->gpr[3] = errno;
+ env->crf[0] |= 1;
+ } else {
+ env->gpr[3] = ret;
+ env->crf[0] &= ~1;
+ }
+}
+
+static void ppc_stat_cb(CPUState *env, target_ulong ret, target_ulong err)
+{
+ /* Do this before we overwrite r3 with the return value. */
+ if (ret != -1) {
+ target_ulong buffer = env->gpr[1] - sizeof(struct ppc_gdb_stat);
+ translate_to_netbsd_stat (env, ARG(1), NULL, buffer);
+ }
+ ppc_semi_cb(env, ret, err);
+}
+
+static void ppc_isatty_cb(CPUState *env, target_ulong ret, target_ulong err)
+{
+ /* isatty returns 0 or 1; translate that to system call-ish conventions.
+ Don't bother propagating errno. */
+ env->gpr[3] = ret ? 0 : -1;
+}
+
+void do_ppc_semihosting(CPUPPCState *env)
+{
+ int nr;
+ void *p, *q;
+ uint32_t len;
+ uint32_t result;
+
+ nr = env->gpr[0];
+ switch (nr) {
+ case HOSTED_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, ARG(0));
+ exit(ARG(0));
+ case HOSTED_OPEN:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "open,%s,%x,%x",
+ ARG(0), target_strlen(ARG(0)),
+ translate_openflags_gdb(ARG(1)), ARG(2));
+ return;
+ } else {
+ if (!(p = lock_user_string(ARG(0)))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = uninterrupted_open(p, translate_openflags_host(ARG(1)), ARG(2));
+ unlock_user(p, ARG(0), 0);
+ }
+ }
+ break;
+ case HOSTED_CLOSE:
+ {
+ /* Ignore attempts to close stdin/out/err. */
+ int fd = ARG(0);
+ if (fd > 2) {
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "close,%x", ARG(0));
+ return;
+ } else {
+ result = uninterrupted_close(fd);
+ }
+ } else {
+ result = 0;
+ }
+ break;
+ }
+ case HOSTED_READ:
+ len = ARG(2);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "read,%x,%x,%x",
+ ARG(0), ARG(1), len);
+ return;
+ } else {
+ if (!(p = lock_user(VERIFY_WRITE, ARG(1), len, 0))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = uninterrupted_read(ARG(0), p, len);
+ unlock_user(p, ARG(1), len);
+ }
+ }
+ break;
+ case HOSTED_WRITE:
+ len = ARG(2);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "write,%x,%x,%x",
+ ARG(0), ARG(1), len);
+ return;
+ } else {
+ if (!(p = lock_user(VERIFY_READ, ARG(1), len, 1))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = uninterrupted_write(ARG(0), p, len);
+ unlock_user(p, ARG(0), 0);
+ }
+ }
+ break;
+ case HOSTED_UNLINK:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "unlink,%s",
+ ARG(0), (int)ARG(1));
+ return;
+ } else {
+ if (!(p = lock_user_string(ARG(0)))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = unlink(p);
+ unlock_user(p, ARG(0), 0);
+ }
+ }
+ break;
+ case HOSTED_BRK:
+ /* Nasty hack: use sp -1M as heap limit. */
+ if (ARG(0) < env->gpr[1] - 0x100000) {
+ result = 0;
+ } else {
+ result = -1;
+ errno = ENOMEM;
+ }
+ break;
+ case HOSTED_LSEEK:
+ {
+ uint64_t off;
+ off = (uint32_t)ARG(2) | ((uint64_t)ARG(1) << 32);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "lseek,%x,%lx,%x",
+ ARG(0), off, ARG(3));
+ return;
+ } else {
+ off = lseek(ARG(0), off, ARG(3));
+ if (off == (uint64_t) -1) {
+ result = -1;
+ } else {
+ env->gpr[3] = off >> 32;
+ env->gpr[4] = (uint32_t) off;
+ env->crf[0] &= ~1;
+ return;
+ }
+ }
+ }
+ break;
+ case HOSTED_STAT:
+ if (use_gdb_syscalls()) {
+ target_ulong buffer = env->gpr[1] - sizeof (struct ppc_gdb_stat);
+ gdb_do_syscall(ppc_stat_cb, "stat,%s,%x", ARG(0), buffer);
+ return;
+ } else {
+ struct stat s;
+ if (!(p = lock_user_string(ARG(0)))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = stat(p, &s);
+ unlock_user(p, ARG(0), 0);
+ }
+ if (result == 0) {
+ translate_to_netbsd_stat(env, ARG(1), &s, 0);
+ }
+ }
+ break;
+ case HOSTED_FSTAT:
+ if (use_gdb_syscalls()) {
+ target_ulong buffer = env->gpr[1] - sizeof (struct ppc_gdb_stat);
+ gdb_do_syscall(ppc_stat_cb, "fstat,%x,%x", ARG(0), buffer);
+ return;
+ } else {
+ struct stat s;
+ result = fstat(ARG(0), &s);
+ if (result == 0) {
+ translate_to_netbsd_stat(env, ARG(1), &s, 0);
+ }
+ }
+ break;
+ case HOSTED_RENAME:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "rename,%s,%s",
+ ARG(0), (int)ARG(1), ARG(2), (int)ARG(3));
+ return;
+ } else {
+ p = lock_user_string(ARG(0));
+ q = lock_user_string(ARG(2));
+ if (!p || !q) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = rename(p, q);
+ }
+ unlock_user(p, ARG(0), 0);
+ unlock_user(q, ARG(2), 0);
+ }
+ break;
+ case HOSTED_ISATTY:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_isatty_cb, "isatty,%x", ARG(0));
+ return;
+ } else {
+ /* Don't bother propagating errno. */
+ env->gpr[3] = isatty(ARG(0)) ? 0 : -1;
+ return;
+ }
+ break;
+ case HOSTED_SYSTEM:
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "system,%s",
+ ARG(0), (int)ARG(1));
+ return;
+ } else {
+ if (!(p = lock_user_string(ARG(0)))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = system(p);
+ unlock_user(p, ARG(0), 0);
+ }
+ }
+ break;
+ case HOSTED_GETTIMEOFDAY:
+ result = -1;
+ errno = ENOSYS;
+#ifdef FIXME
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(ppc_semi_cb, "gettimeofday,%x,%x",
+ ARG(0), ARG(1));
+ return;
+ } else {
+ qemu_timeval tv;
+ struct gdb_timeval *p;
+ result = qemu_gettimeofday(&tv);
+ if (result != 0) {
+ if (!(p = lock_user(VERIFY_WRITE,
+ ARG(0), sizeof(struct gdb_timeval), 0))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ p->tv_sec = cpu_to_be32(tv.tv_sec);
+ p->tv_usec = cpu_to_be64(tv.tv_usec);
+ unlock_user(p, ARG(0), sizeof(struct gdb_timeval));
+ }
+ }
+ }
+#endif
+ break;
+ default:
+ cpu_abort(env, "Unsupported semihosting syscall %d\n", nr);
+ result = 0;
+ }
+ if (result == -1) {
+ env->gpr[3] = errno;
+ env->crf[0] |= 1;
+ } else {
+ env->gpr[3] = result;
+ env->crf[0] &= ~1;
+ }
+}