/* Remote target system call support.
- Copyright 1997, 1998, 2002, 2004, 2007, 2008 Free Software Foundation, Inc.
+ Copyright 1997-2023 Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
This file is part of GDB.
tree, nor should it live in the gdb source tree. K&R C must be
supported. */
-#ifdef HAVE_CONFIG_H
-#include "cconfig.h"
-#endif
-#include "ansidecl.h"
-#include "libiberty.h"
+/* This must come before any other includes. */
+#include "defs.h"
+
+#include <errno.h>
+#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
-#ifdef HAVE_STDLIB_H
#include <stdlib.h>
-#endif
-#ifdef HAVE_STRING_H
#include <string.h>
-#elif defined (HAVE_STRINGS_H)
-#include <strings.h>
-#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <errno.h>
-#include <fcntl.h>
#include <time.h>
-#include <sys/types.h>
+#include <unistd.h>
#include <sys/stat.h>
-#include "gdb/callback.h"
-#include "targ-vals.h"
+#include <sys/types.h>
+
+#include "ansidecl.h"
+#include "libiberty.h"
+
+#include "sim/callback.h"
#ifndef ENOSYS
#define ENOSYS EINVAL
/* Utility of cb_syscall to fetch a path name or other string from the target.
The result is 0 for success or a host errno value. */
-static int
-get_string (cb, sc, buf, buflen, addr)
- host_callback *cb;
- CB_SYSCALL *sc;
- char *buf;
- int buflen;
- TADDR addr;
+int
+cb_get_string (host_callback *cb, CB_SYSCALL *sc, char *buf, int buflen,
+ TADDR addr)
{
char *p, *pend;
path name along with the syscall request, and cache the file
name somewhere (or otherwise tweak this as desired). */
unsigned int count = (*sc->read_mem) (cb, sc, addr, p, 1);
-
+
if (count != 1)
return EINVAL;
if (*p == 0)
If an error occurs, no buffer is left malloc'd. */
static int
-get_path (cb, sc, addr, bufp)
- host_callback *cb;
- CB_SYSCALL *sc;
- TADDR addr;
- char **bufp;
+get_path (host_callback *cb, CB_SYSCALL *sc, TADDR addr, char **bufp)
{
char *buf = xmalloc (MAX_PATH_LEN);
int result;
int sysroot_len = strlen (simulator_sysroot);
- result = get_string (cb, sc, buf, MAX_PATH_LEN - sysroot_len, addr);
+ result = cb_get_string (cb, sc, buf, MAX_PATH_LEN - sysroot_len, addr);
if (result == 0)
{
/* Prepend absolute paths with simulator_sysroot. Relative paths
/* Perform a system call on behalf of the target. */
CB_RC
-cb_syscall (cb, sc)
- host_callback *cb;
- CB_SYSCALL *sc;
+cb_syscall (host_callback *cb, CB_SYSCALL *sc)
{
TWORD result = 0, errcode = 0;
switch (cb_target_to_host_syscall (cb, sc->func))
{
-#if 0 /* FIXME: wip */
+ case CB_SYS_argc:
+ result = countargv (cb->argv);
+ break;
+
+ case CB_SYS_argnlen:
+ {
+ if (sc->arg1 >= 0 && sc->arg1 < countargv (cb->argv))
+ result = strlen (cb->argv[sc->arg1]);
+ else
+ {
+ result = -1;
+ errcode = EINVAL;
+ }
+ }
+ break;
+
+ case CB_SYS_argn:
+ {
+ if (sc->arg1 >= 0 && sc->arg1 < countargv (cb->argv))
+ {
+ const char *argn = cb->argv[sc->arg1];
+ int len = strlen (argn);
+ int written = sc->write_mem (cb, sc, sc->arg2, argn, len + 1);
+
+ if (written == len + 1)
+ result = sc->arg2;
+ else
+ {
+ result = -1;
+ errcode = EINVAL;
+ }
+ }
+ else
+ {
+ result = -1;
+ errcode = EINVAL;
+ }
+ }
+ break;
+
case CB_SYS_argvlen :
{
/* Compute how much space is required to store the argv,envp
strings so that the program can allocate the space and then
call SYS_argv to fetch the values. */
- int addr_size = cb->addr_size;
- int argc,envc,arglen,envlen;
- const char **argv = cb->init_argv;
- const char **envp = cb->init_envp;
+ int argc, envc, arglen, envlen;
+ char **argv = cb->argv;
+ char **envp = cb->envp;
argc = arglen = 0;
if (argv)
for ( ; envp[envc]; ++envc)
envlen += strlen (envp[envc]) + 1;
}
- result = arglen + envlen;
+ result = arglen + 1 + envlen + 1;
break;
}
TADDR tbuf = sc->arg1;
/* Buffer size. */
int bufsize = sc->arg2;
+ int written = 0;
/* Q is the target address of where all the strings go. */
TADDR q;
- int word_size = cb->word_size;
- int i,argc,envc,len;
- const char **argv = cb->init_argv;
- const char **envp = cb->init_envp;
+ int i, argc, envc, len, ret;
+ char **argv = cb->argv;
+ char **envp = cb->envp;
+
+ result = -1;
argc = 0;
if (argv)
{
for ( ; argv[argc]; ++argc)
{
- int len = strlen (argv[argc]);
- int written = (*sc->write_mem) (cb, sc, tbuf, argv[argc], len + 1);
- if (written != len)
- {
- result = -1;
- errcode = EINVAL;
- goto FinishSyscall;
- }
- tbuf = len + 1;
+ len = strlen (argv[argc]) + 1;
+ if (written + len > bufsize)
+ goto efault;
+
+ ret = (*sc->write_mem) (cb, sc, tbuf + written, argv[argc],
+ len);
+ if (ret != len)
+ goto einval;
+
+ written += ret;
}
}
- if ((*sc->write_mem) (cb, sc, tbuf, "", 1) != 1)
- {
- result = -1;
- errcode = EINVAL;
- goto FinishSyscall;
- }
- tbuf++;
+ /* Double NUL bytes indicates end of strings. */
+ if (written >= bufsize)
+ goto efault;
+ if ((*sc->write_mem) (cb, sc, tbuf + written, "", 1) != 1)
+ goto einval;
+ ++written;
+
envc = 0;
if (envp)
{
for ( ; envp[envc]; ++envc)
{
- int len = strlen (envp[envc]);
- int written = (*sc->write_mem) (cb, sc, tbuf, envp[envc], len + 1);
- if (written != len)
- {
- result = -1;
- errcode = EINVAL;
- goto FinishSyscall;
- }
- tbuf = len + 1;
+ len = strlen (envp[envc]) + 1;
+ if (written + len > bufsize)
+ goto efault;
+
+ ret = (*sc->write_mem) (cb, sc, tbuf + written, envp[envc],
+ len);
+ if (ret != len)
+ goto einval;
+ written += ret;
}
}
- if ((*sc->write_mem) (cb, sc, tbuf, "", 1) != 1)
- {
- result = -1;
- errcode = EINVAL;
- goto FinishSyscall;
- }
+ /* Double NUL bytes indicates end of strings. */
+ if (written >= bufsize)
+ goto efault;
+ if ((*sc->write_mem) (cb, sc, tbuf + written, "", 1) != 1)
+ goto einval;
+
result = argc;
sc->result2 = envc;
break;
+
+ efault:
+ errcode = EFAULT;
+ goto FinishSyscall;
+
+ einval:
+ errcode = EINVAL;
+ goto FinishSyscall;
}
-#endif /* wip */
case CB_SYS_exit :
- /* Caller must catch and handle. */
+ /* Caller must catch and handle; see sim_syscall as an example. */
break;
case CB_SYS_open :
errcode = EINVAL;
goto FinishSyscall;
}
- if (cb_is_stdout(cb, fd))
+ if (cb_is_stdout (cb, fd))
{
result = (int) (*cb->write_stdout) (cb, buf, bytes_read);
(*cb->flush_stdout) (cb);
}
- else if (cb_is_stderr(cb, fd))
+ else if (cb_is_stderr (cb, fd))
{
result = (int) (*cb->write_stderr) (cb, buf, bytes_read);
(*cb->flush_stderr) (cb);
result = -1;
goto FinishSyscall;
}
- result = (*cb->stat) (cb, path, &statbuf);
+ result = (*cb->to_stat) (cb, path, &statbuf);
free (path);
if (result < 0)
goto ErrorFinish;
struct stat statbuf;
TADDR addr = sc->arg2;
- result = (*cb->fstat) (cb, sc->arg1, &statbuf);
+ result = (*cb->to_fstat) (cb, sc->arg1, &statbuf);
if (result < 0)
goto ErrorFinish;
buflen = cb_host_to_target_stat (cb, NULL, NULL);
result = -1;
goto FinishSyscall;
}
- result = (*cb->lstat) (cb, path, &statbuf);
+ result = (*cb->to_lstat) (cb, path, &statbuf);
free (path);
if (result < 0)
goto ErrorFinish;
}
break;
+ case CB_SYS_getpid:
+ /* POSIX says getpid always succeeds. */
+ result = (*cb->getpid) (cb);
+ break;
+
+ case CB_SYS_kill:
+ /* If killing self, leave it to the caller to process so it can send the
+ signal to the engine. */
+ if (sc->arg1 == (*cb->getpid) (cb))
+ {
+ result = -1;
+ errcode = ENOSYS;
+ }
+ else
+ {
+ int signum = cb_target_to_host_signal (cb, sc->arg2);
+
+ result = (*cb->kill) (cb, sc->arg1, signum);
+ cb->last_errno = errno;
+ goto ErrorFinish;
+ }
+ break;
+
case CB_SYS_time :
{
/* FIXME: May wish to change CB_SYS_time to something else.
We might also want gettimeofday or times, but if system calls
can be built on others, we can keep the number we have to support
here down. */
- time_t t = (*cb->time) (cb, (time_t *) 0);
+ time_t t = (*cb->time) (cb);
result = t;
/* It is up to target code to process the argument to time(). */
}
projects / thirdparty / binutils-gdb.git / blobdiff