aboutsummaryrefslogtreecommitdiff
path: root/sim/m32c/syscalls.c
diff options
context:
space:
mode:
Diffstat (limited to 'sim/m32c/syscalls.c')
-rw-r--r--sim/m32c/syscalls.c336
1 files changed, 0 insertions, 336 deletions
diff --git a/sim/m32c/syscalls.c b/sim/m32c/syscalls.c
deleted file mode 100644
index 0a1c249..0000000
--- a/sim/m32c/syscalls.c
+++ /dev/null
@@ -1,336 +0,0 @@
-/* syscalls.c --- implement system calls for the M32C simulator.
-
-Copyright (C) 2005 Free Software Foundation, Inc.
-Contributed by Red Hat, Inc.
-
-This file is part of the GNU simulators.
-
-The GNU simulators are free software; you can redistribute them and/or
-modify them 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.
-
-The GNU simulators are distributed in the hope that they 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 the GNU simulators; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/time.h>
-
-#include "gdb/callback.h"
-
-#include "cpu.h"
-#include "mem.h"
-#include "syscalls.h"
-
-#include "syscall.h"
-
-/* The current syscall callbacks we're using. */
-static struct host_callback_struct *callbacks;
-
-void
-set_callbacks (struct host_callback_struct *cb)
-{
- callbacks = cb;
-}
-
-
-/* A16 ABI: arg1 in r1l (QI) or r1 (HI) or stack
- arg2 in r2 (HI) or stack
- arg3..N on stack
- padding: none
-
- A24 ABI: arg1 in r0l (QI) or r0 (HI) or stack
- arg2..N on stack
- padding: qi->hi
-
- return value in r0l (QI) r0 (HI) r2r0 (SI)
- structs: pointer pushed on stack last
-
-*/
-
-int argp, stackp;
-
-static int
-arg (int bytes)
-{
- int rv = 0;
- argp++;
- if (A16)
- {
- switch (argp)
- {
- case 1:
- if (bytes == 1)
- return get_reg (r1l);
- if (bytes == 2)
- return get_reg (r1);
- break;
- case 2:
- if (bytes == 2)
- return get_reg (r2);
- break;
- }
- }
- else
- {
- switch (argp)
- {
- case 1:
- if (bytes == 1)
- return get_reg (r0l);
- if (bytes == 2)
- return get_reg (r0);
- break;
- }
- }
- if (bytes == 0)
- bytes = 2;
- switch (bytes)
- {
- case 1:
- rv = mem_get_qi (get_reg (sp) + stackp);
- if (A24)
- stackp++;
- break;
- case 2:
- rv = mem_get_hi (get_reg (sp) + stackp);
- break;
- case 3:
- rv = mem_get_psi (get_reg (sp) + stackp);
- if (A24)
- stackp++;
- break;
- case 4:
- rv = mem_get_si (get_reg (sp) + stackp);
- break;
- }
- stackp += bytes;
- return rv;
-}
-
-static void
-read_target (char *buffer, int address, int count, int asciiz)
-{
- char byte;
- while (count > 0)
- {
- byte = mem_get_qi (address++);
- *buffer++ = byte;
- if (asciiz && (byte == 0))
- return;
- count--;
- }
-}
-
-static void
-write_target (char *buffer, int address, int count, int asciiz)
-{
- char byte;
- while (count > 0)
- {
- byte = *buffer++;
- mem_put_qi (address++, byte);
- if (asciiz && (byte == 0))
- return;
- count--;
- }
-}
-
-#define PTRSZ (A16 ? 2 : 3)
-
-static char *callnames[] = {
- "SYS_zero",
- "SYS_exit",
- "SYS_open",
- "SYS_close",
- "SYS_read",
- "SYS_write",
- "SYS_lseek",
- "SYS_unlink",
- "SYS_getpid",
- "SYS_kill",
- "SYS_fstat",
- "SYS_sbrk",
- "SYS_argvlen",
- "SYS_argv",
- "SYS_chdir",
- "SYS_stat",
- "SYS_chmod",
- "SYS_utime",
- "SYS_time",
- "SYS_gettimeofday",
- "SYS_times",
- "SYS_link"
-};
-
-void
-m32c_syscall (int id)
-{
- static char buf[256];
- int rv;
-
- argp = 0;
- stackp = A16 ? 3 : 4;
- if (trace)
- printf ("\033[31m/* SYSCALL(%d) = %s */\033[0m\n", id, callnames[id]);
- switch (id)
- {
- case SYS_exit:
- {
- int ec = arg (2);
- if (verbose)
- printf ("[exit %d]\n", ec);
- step_result = M32C_MAKE_EXITED (ec);
- }
- break;
-
- case SYS_open:
- {
- int path = arg (PTRSZ);
- int oflags = arg (2);
- int cflags = arg (2);
-
- read_target (buf, path, 256, 1);
- if (trace)
- printf ("open(\"%s\",0x%x,%#o) = ", buf, oflags, cflags);
-
- if (callbacks)
- /* The callback vector ignores CFLAGS. */
- rv = callbacks->open (callbacks, buf, oflags);
- else
- {
- int h_oflags = 0;
-
- if (oflags & 0x0001)
- h_oflags |= O_WRONLY;
- if (oflags & 0x0002)
- h_oflags |= O_RDWR;
- if (oflags & 0x0200)
- h_oflags |= O_CREAT;
- if (oflags & 0x0008)
- h_oflags |= O_APPEND;
- if (oflags & 0x0400)
- h_oflags |= O_TRUNC;
- rv = open (buf, h_oflags, cflags);
- }
- if (trace)
- printf ("%d\n", rv);
- put_reg (r0, rv);
- }
- break;
-
- case SYS_close:
- {
- int fd = arg (2);
-
- if (callbacks)
- rv = callbacks->close (callbacks, fd);
- else if (fd > 2)
- rv = close (fd);
- else
- rv = 0;
- if (trace)
- printf ("close(%d) = %d\n", fd, rv);
- put_reg (r0, rv);
- }
- break;
-
- case SYS_read:
- {
- int fd = arg (2);
- int addr = arg (PTRSZ);
- int count = arg (2);
-
- if (count > sizeof (buf))
- count = sizeof (buf);
- if (callbacks)
- rv = callbacks->read (callbacks, fd, buf, count);
- else
- rv = read (fd, buf, count);
- if (trace)
- printf ("read(%d,%d) = %d\n", fd, count, rv);
- if (rv > 0)
- write_target (buf, addr, rv, 0);
- put_reg (r0, rv);
- }
- break;
-
- case SYS_write:
- {
- int fd = arg (2);
- int addr = arg (PTRSZ);
- int count = arg (2);
-
- if (count > sizeof (buf))
- count = sizeof (buf);
- if (trace)
- printf ("write(%d,0x%x,%d)\n", fd, addr, count);
- read_target (buf, addr, count, 0);
- if (trace)
- fflush (stdout);
- if (callbacks)
- rv = callbacks->write (callbacks, fd, buf, count);
- else
- rv = write (fd, buf, count);
- if (trace)
- printf ("write(%d,%d) = %d\n", fd, count, rv);
- put_reg (r0, rv);
- }
- break;
-
- case SYS_getpid:
- put_reg (r0, 42);
- break;
-
- case SYS_gettimeofday:
- {
- int tvaddr = arg (PTRSZ);
- struct timeval tv;
-
- rv = gettimeofday (&tv, 0);
- if (trace)
- printf ("gettimeofday: %ld sec %ld usec to 0x%x\n", tv.tv_sec,
- tv.tv_usec, tvaddr);
- mem_put_si (tvaddr, tv.tv_sec);
- mem_put_si (tvaddr + 4, tv.tv_usec);
- put_reg (r0, rv);
- }
- break;
-
- case SYS_kill:
- {
- int pid = arg (2);
- int sig = arg (2);
- if (pid == 42)
- {
- if (verbose)
- printf ("[signal %d]\n", sig);
- step_result = M32C_MAKE_STOPPED (sig);
- }
- }
- break;
-
- case 11:
- {
- int heaptop_arg = arg (PTRSZ);
- if (trace)
- printf ("sbrk: heap top set to %x\n", heaptop_arg);
- heaptop = heaptop_arg;
- if (heapbottom == 0)
- heapbottom = heaptop_arg;
- }
- break;
-
- }
-}
generated by cgit v1.1 at 2025-04-03 18:18:45 +0000