* callback.h (CB_TARGET_DEFS_MAP): Renamed from target_defs_map.
(host_callback): Add stat, fstat, syscall_map, errno_map, open_map,
signal_map, stat_map.
(errn_map,open_map): Renamed to cb_init_foo_map.
(cb_host_to_target_errno,cb_target_to_host_open): Renamed from
host_to_target_errno,target_to_host_open.
(cb_read_target_syscall_maps): Add prototype.
(cb_target_to_host_syscall): Likewise.
(cb_host_to_target_stat): Likewise.
(cb_syscall): Likewise.
(CB_SYS_{exit,open,close,read,write,lseek,unlink,getpid,kill,fstat,
argvlen,argv,chdir,stat,chmod,utime,time}): Define.
(CB_SYSCALL): New type.
(CB_RC): New enum.
This commit is contained in:
Doug Evans
parent
bf39c4900e
commit
8d5306e718
2 changed files with 169 additions and 25 deletions
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@ -1,3 +1,27 @@
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Mon Nov 17 14:00:51 1997 Doug Evans <devans@seba.cygnus.com>
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* callback.h (CB_TARGET_DEFS_MAP): Renamed from target_defs_map.
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(host_callback): Add stat, fstat, syscall_map, errno_map, open_map,
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signal_map, stat_map.
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(errn_map,open_map): Renamed to cb_init_foo_map.
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(cb_host_to_target_errno,cb_target_to_host_open): Renamed from
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host_to_target_errno,target_to_host_open.
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(cb_read_target_syscall_maps): Add prototype.
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(cb_target_to_host_syscall): Likewise.
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(cb_host_to_target_stat): Likewise.
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(cb_syscall): Likewise.
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(CB_SYS_{exit,open,close,read,write,lseek,unlink,getpid,kill,fstat,
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argvlen,argv,chdir,stat,chmod,utime,time}): Define.
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(CB_SYSCALL): New type.
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(CB_RC): New enum.
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Tue Oct 14 16:07:51 1997 Nick Clifton <nickc@cygnus.com>
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* dis-asm.h (struct disassemble_info): New field
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'symbol_at_address_func'.
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(INIT_DISASSEMBLE_INFO_NO_ARCH): Initialise new field with
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generic_symbol_at_address.
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Mon Oct 13 10:17:15 1997 Andrew Cagney <cagney@b1.cygnus.com>
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* remote-sim.h: Clarify sim_read, sim_write MEM argument.
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@ -235,12 +259,10 @@ Mon Sep 30 13:56:11 1996 Fred Fish <fnf@cygnus.com>
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* libiberty.h: Remove #ifndef PRIVATE_XMALLOC.
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start-sanitize-v850
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Sat Aug 31 13:27:06 1996 Jeffrey A Law (law@cygnus.com)
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* dis-asm.h (print_insn_v850): Declare.
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end-sanitize-v850
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Tue Aug 13 16:10:30 1996 Stu Grossman (grossman@critters.cygnus.com)
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* obstack.h: Change bcopy to memcpy. Works better on Posix
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@ -1,5 +1,6 @@
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/* Remote target system call callback support.
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Copyright 1997 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions.
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This file is part of GDB.
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@ -17,19 +18,36 @@ You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* ??? This interface isn't intended to be specific to any particular kind
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of remote (hardware, simulator, whatever). However, at the present
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time it is only used by the simulators. At some point this should be
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an entity onto itself. For example, it's wrong that the definitions of the
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functions host_to_target_errno, target_to_host_open live in the simulator
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sources. It would also be wrong for such functions to live in gdb
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sources. Until such time perhaps it would be best to avoid adding
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prototypes of functions (and thus expanding the definition of the
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interface). */
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/* This interface isn't intended to be specific to any particular kind
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of remote (hardware, simulator, whatever). As such, support for it
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(e.g. sim/common/callback.c) should *not* live in the simulator source
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tree, nor should it live in the gdb source tree. */
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/* There are various ways to handle system calls:
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1) Have a simulator intercept the appropriate trap instruction and
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directly perform the system call on behalf of the target program.
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This is the typical way of handling system calls for embedded targets.
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[Handling system calls for embedded targets isn't that much of an
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oxymoron as running compiler testsuites make use of the capability.]
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This method of system call handling is done when STATE_ENVIRONMENT
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is ENVIRONMENT_USER.
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2) Have a simulator emulate the hardware as much as possible.
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If the program running on the real hardware communicates with some sort
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of target manager, one would want to be able to run this program on the
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simulator as well.
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This method of system call handling is done when STATE_ENVIRONMENT
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is ENVIRONMENT_OPERATING.
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*/
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#ifndef CALLBACK_H
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#define CALLBACK_H
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/* ??? The reason why we check for va_start here should be documented. */
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#ifndef va_start
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#include <ansidecl.h>
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#ifdef ANSI_PROTOTYPES
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@ -38,11 +56,20 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <varargs.h>
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#endif
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#endif
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/* Mapping of host/target values. */
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/* ??? For debugging purposes, one might want to add a string of the
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name of the symbol. */
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typedef struct host_callback_struct host_callback;
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typedef struct {
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int host_val;
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int target_val;
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} CB_TARGET_DEFS_MAP;
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#define MAX_CALLBACK_FDS 10
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typedef struct host_callback_struct host_callback;
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struct host_callback_struct
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{
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int (*close) PARAMS ((host_callback *,int));
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@ -61,6 +88,9 @@ struct host_callback_struct
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void (*flush_stdout) PARAMS ((host_callback *));
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int (*write_stderr) PARAMS ((host_callback *, const char *, int));
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void (*flush_stderr) PARAMS ((host_callback *));
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/* PTR is not `struct stat' because the target's value is stored. */
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int (*stat) PARAMS ((host_callback *, const char *, PTR));
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int (*fstat) PARAMS ((host_callback *, int, PTR));
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/* When present, call to the client to give it the oportunity to
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poll any io devices for a request to quit (indicated by a nonzero
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@ -92,28 +122,120 @@ struct host_callback_struct
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char fdopen[MAX_CALLBACK_FDS];
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char alwaysopen[MAX_CALLBACK_FDS];
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/* Marker for thse wanting to do sanity checks.
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This should remain the last memeber of this struct to help catch
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/* System call numbers. */
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CB_TARGET_DEFS_MAP *syscall_map;
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/* Errno values. */
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CB_TARGET_DEFS_MAP *errno_map;
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/* Flags to the open system call. */
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CB_TARGET_DEFS_MAP *open_map;
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/* Signal numbers. */
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CB_TARGET_DEFS_MAP *signal_map;
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/* Layout of `stat' struct.
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The format is a series of "name,length" pairs separated by colons.
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Empty space is indicated with a `name' of "space".
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All padding must be explicitly mentioned.
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Lengths are in bytes. If this needs to be extended to bits,
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use "name.bits".
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Example: "st_dev,4:st_ino,4:st_mode,4:..." */
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const char *stat_map;
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/* Marker for those wanting to do sanity checks.
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This should remain the last member of this struct to help catch
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miscompilation errors. */
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#define HOST_CALLBACK_MAGIC 4705 /* teds constant */
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int magic;
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};
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extern host_callback default_callback;
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/* Canonical versions of system call numbers.
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It's not intended to willy-nilly throw every system call ever heard
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of in here. Only include those that have an important use. */
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/* Mapping of host/target values. */
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/* ??? For debugging purposes, one might want to add a string of the
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name of the symbol. */
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#define CB_SYS_exit 1
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#define CB_SYS_open 2
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#define CB_SYS_close 3
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#define CB_SYS_read 4
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#define CB_SYS_write 5
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#define CB_SYS_lseek 6
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#define CB_SYS_unlink 7
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#define CB_SYS_getpid 8
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#define CB_SYS_kill 9
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#define CB_SYS_fstat 10
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/*#define CB_SYS_sbrk 11 - not currently a system call, but reserved. */
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typedef struct {
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int host_val;
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int target_val;
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} target_defs_map;
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/* ARGV support. */
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#define CB_SYS_argvlen 12
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#define CB_SYS_argv 13
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extern target_defs_map errno_map[];
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extern target_defs_map open_map[];
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/* These are extras added for one reason or another. */
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#define CB_SYS_chdir 20
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#define CB_SYS_stat 21
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#define CB_SYS_chmod 22
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#define CB_SYS_utime 23
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#define CB_SYS_time 24
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/* Struct use to pass and return information necessary to perform a
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system call. */
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/* FIXME: Need to consider target word size. */
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extern int host_to_target_errno PARAMS ((int));
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extern int target_to_host_open PARAMS ((int));
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typedef struct cb_syscall {
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/* The target's value of what system call to perform. */
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int func;
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/* The arguments to the syscall. */
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long arg1, arg2, arg3, arg4;
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/* The result. */
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long result;
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/* Some system calls have two results. */
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long result2;
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/* The target's errno value, or 0 if success.
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This is converted to the target's value with host_to_target_errno. */
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int errcode;
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/* Working space to be used by memory read/write callbacks. */
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long x1,x2;
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/* Callbacks for reading/writing memory (e.g. for read/write syscalls). */
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unsigned long (*read_mem) PARAMS ((host_callback *, struct cb_syscall *, unsigned long taddr, char *buf, unsigned long bytes));
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unsigned long (*write_mem) PARAMS ((host_callback *, struct cb_syscall *, unsigned long taddr, const char *buf, unsigned long bytes));
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} CB_SYSCALL;
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/* Return codes for various interface routines. */
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typedef enum {
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CB_RC_OK = 0,
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/* generic error */
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CB_RC_ERR,
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/* either file not found or no read access */
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CB_RC_ACCESS,
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CB_RC_NO_MEM
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} CB_RC;
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/* Read in target values for system call numbers, errno values, signals. */
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CB_RC cb_read_target_syscall_maps PARAMS ((host_callback *, const char *));
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/* Translate target to host syscall function numbers. */
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int cb_target_to_host_syscall PARAMS ((host_callback *, int));
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/* Translate host to target errno value. */
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int cb_host_to_target_errno PARAMS ((host_callback *, int));
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/* Translate target to host open flags. */
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int cb_target_to_host_open PARAMS ((host_callback *, int));
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/* Translate target signal number to host. */
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int cb_target_to_host_signal PARAMS ((host_callback *, int));
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/* Translate host signal number to target. */
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int cb_host_to_target_signal PARAMS ((host_callback *, int));
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/* Translate host stat struct to target. */
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struct stat; /* forward decl */
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int cb_host_to_target_stat PARAMS ((host_callback *, const struct stat *,
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PTR, int));
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/* Perform a system call. */
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CB_RC cb_syscall PARAMS ((host_callback *, CB_SYSCALL *));
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#endif
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