ARM "Angel" semihosting syscalls (Paul Brook)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1383 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/linux-user/arm-semi.c b/linux-user/arm-semi.c
new file mode 100644
index 0000000..f37b65c
--- /dev/null
+++ b/linux-user/arm-semi.c
@@ -0,0 +1,193 @@
+/*
+ * Arm "Angel" semihosting syscalls
+ *
+ * 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 <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+#include "qemu.h"
+
+#define ARM_ANGEL_HEAP_SIZE (128 * 1024 * 1024)
+
+#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
+
+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
+};
+
+static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code)
+{
+ if (code == (uint32_t)-1)
+ ts->swi_errno = errno;
+ return code;
+}
+
+#define ARG(x) tswap32(args[x])
+uint32_t do_arm_semihosting(CPUState *env)
+{
+ uint32_t *args;
+ char * s;
+ int nr;
+ uint32_t ret;
+ TaskState *ts = env->opaque;
+
+ nr = env->regs[0];
+ args = (uint32_t *)env->regs[1];
+ switch (nr) {
+ case SYS_OPEN:
+ s = (char *)ARG(0);
+ if (ARG(1) >= 12)
+ return (uint32_t)-1;
+ if (strcmp(s, ":tt") == 0) {
+ if (ARG(1) < 4)
+ return STDIN_FILENO;
+ else
+ return STDOUT_FILENO;
+ }
+ return set_swi_errno(ts, open(s, open_modeflags[ARG(1)]));
+ case SYS_CLOSE:
+ return set_swi_errno(ts, close(ARG(0)));
+ case SYS_WRITEC:
+ /* Write to debug console. stderr is near enough. */
+ return write(STDERR_FILENO, args, 1);
+ case SYS_WRITE0:
+ s = (char *)args;
+ return write(STDERR_FILENO, s, strlen(s));
+ case SYS_WRITE:
+ ret = set_swi_errno(ts, write(ARG(0), (void *)ARG(1), ARG(2)));
+ if (ret == (uint32_t)-1)
+ return -1;
+ return ARG(2) - ret;
+ case SYS_READ:
+ ret = set_swi_errno(ts, read(ARG(0), (void *)ARG(1), ARG(2)));
+ if (ret == (uint32_t)-1)
+ return -1;
+ return ARG(2) - ret;
+ case SYS_READC:
+ /* XXX: Read from debug cosole. Not implemented. */
+ return 0;
+ case SYS_ISTTY:
+ return isatty(ARG(0));
+ case SYS_SEEK:
+ return set_swi_errno(ts, lseek(ARG(0), ARG(1), SEEK_SET));
+ case SYS_FLEN:
+ {
+ 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:
+ return set_swi_errno(ts, remove((char *)ARG(0)));
+ case SYS_RENAME:
+ return set_swi_errno(ts, rename((char *)ARG(0), (char *)ARG(2)));
+ case SYS_CLOCK:
+ return clock() / (CLOCKS_PER_SEC / 100);
+ case SYS_TIME:
+ return set_swi_errno(ts, time(NULL));
+ case SYS_SYSTEM:
+ return set_swi_errno(ts, system((char *)ARG(0)));
+ case SYS_ERRNO:
+ return ts->swi_errno;
+ case SYS_GET_CMDLINE:
+ /* XXX: Not implemented. */
+ s = (char *)ARG(0);
+ *s = 0;
+ return -1;
+ case SYS_HEAPINFO:
+ {
+ uint32_t *ptr;
+ uint32_t limit;
+
+ /* Some C llibraries assume the heap immediately follows .bss, so
+ allocate it using sbrk. */
+ if (!ts->heap_limit) {
+ long ret;
+
+ ts->heap_base = do_brk(NULL);
+ limit = ts->heap_base + ARM_ANGEL_HEAP_SIZE;
+ /* Try a big heap, and reduce the size if that fails. */
+ for (;;) {
+ ret = do_brk((char *)limit);
+ if (ret != -1)
+ break;
+ limit = (ts->heap_base >> 1) + (limit >> 1);
+ }
+ ts->heap_limit = limit;
+ }
+
+ ptr = (uint32_t *)tswap32(ARG(0));
+ ptr[0] = tswap32(ts->heap_base);
+ ptr[1] = tswap32(ts->heap_limit);
+ ptr[2] = tswap32(ts->stack_base);
+ ptr[3] = tswap32(0); /* Stack limit. */
+ return 0;
+ }
+ case SYS_EXIT:
+ exit(0);
+ default:
+ fprintf(stderr, "qemu: Unsupported SemiHosting SWI 0x%02x\n", nr);
+ cpu_dump_state(env, stderr, fprintf, 0);
+ abort();
+ }
+}
+
