350 lines
14 KiB
C
350 lines
14 KiB
C
/* Abstract Machine for the Small compiler
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*
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* Copyright (c) ITB CompuPhase, 1997-2003
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*
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* This software is provided "as-is", without any express or implied warranty.
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* In no event will the authors be held liable for any damages arising from
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* the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software in
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* a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* Version: $Id$
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*/
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#if defined LINUX
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#include <embryo_cc_sclinux.h>
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#endif
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#ifndef __AMX_H
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#define __AMX_H
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#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
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/* The ISO C99 defines the int16_t and int_32t types. If the compiler got
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* here, these types are probably undefined.
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*/
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#if defined __LCC__ || defined LINUX
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#include <stdint.h>
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#else
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typedef short int int16_t;
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typedef unsigned short int uint16_t;
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#if defined SN_TARGET_PS2
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typedef int int32_t;
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typedef unsigned int uint32_t;
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#else
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typedef long int int32_t;
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typedef unsigned long int uint32_t;
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#endif
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#endif
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#endif
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#if defined __WIN32__ || defined _WIN32 || defined WIN32 || defined __MSDOS__
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#if !defined alloca
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#define alloca(n) _alloca(n)
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* calling convention for native functions */
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#if !defined AMX_NATIVE_CALL
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#define AMX_NATIVE_CALL
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#endif
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/* calling convention for all interface functions and callback functions */
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#if !defined AMXAPI
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#if defined STDECL
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#define AMXAPI __stdcall
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#elif defined CDECL
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#define AMXAPI __cdecl
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#else
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#define AMXAPI
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#endif
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#endif
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#if !defined AMXEXPORT
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#define AMXEXPORT
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#endif
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/* File format version Required AMX version
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* 0 (original version) 0
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* 1 (opcodes JUMP.pri, SWITCH and CASETBL) 1
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* 2 (compressed files) 2
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* 3 (public variables) 2
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* 4 (opcodes SWAP.pri/alt and PUSHADDR) 4
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* 5 (tagnames table) 4
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* 6 (reformatted header) 6
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* 7 (name table, opcodes SYMTAG & SYSREQ.D) 7
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*/
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#define CUR_FILE_VERSION 7 /* current file version; also the current AMX version */
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#define MIN_FILE_VERSION 6 /* lowest supported file format version for the current AMX version */
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#define MIN_AMX_VERSION 7 /* minimum AMX version needed to support the current file format */
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#if !defined CELL_TYPE
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#define CELL_TYPE
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#if defined(BIT16)
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typedef uint16_t ucell; /* only for type casting */
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typedef int16_t cell;
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#else
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typedef uint32_t ucell;
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typedef int32_t cell;
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#endif
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#endif
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struct tagAMX;
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typedef cell (AMX_NATIVE_CALL *AMX_NATIVE)(struct tagAMX *amx, cell *params);
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typedef int (AMXAPI *AMX_CALLBACK)(struct tagAMX *amx, cell index,
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cell *result, cell *params);
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typedef int (AMXAPI *AMX_DEBUG)(struct tagAMX *amx);
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#if !defined _FAR
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#define _FAR
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#endif
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#if defined _MSC_VER
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#pragma warning(disable:4103) /* disable warning message 4103 that complains
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* about pragma pack in a header file */
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#pragma warning(disable:4100) /* "'%$S' : unreferenced formal parameter" */
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#endif
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/* Some compilers do not support the #pragma align, which should be fine. Some
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* compilers give a warning on unknown #pragmas, which is not so fine...
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*/
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#if defined SN_TARGET_PS2 || defined __GNUC__
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#define AMX_NO_ALIGN
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#endif
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#if defined __GNUC__
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#define PACKED __attribute__((packed))
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#else
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#define PACKED
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#endif
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#if !defined AMX_NO_ALIGN
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#if defined LINUX
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#pragma pack(1) /* structures must be packed (byte-aligned) */
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#else
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#pragma pack(push)
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#pragma pack(1) /* structures must be packed (byte-aligned) */
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#if defined __TURBOC__
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#pragma option -a- /* "pack" pragma for older Borland compilers */
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#endif
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#endif
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#endif
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typedef struct {
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char _FAR *name PACKED;
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AMX_NATIVE func PACKED;
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} AMX_NATIVE_INFO PACKED;
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#define AMX_USERNUM 4
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#define sEXPMAX 19 /* maximum name length for file version <= 6 */
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#define sNAMEMAX 31 /* maximum name length of symbol name */
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typedef struct tagAMX_FUNCSTUB {
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uint32_t address PACKED;
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char name[sEXPMAX+1] PACKED;
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} AMX_FUNCSTUB PACKED;
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/* The AMX structure is the internal structure for many functions. Not all
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* fields are valid at all times; many fields are cached in local variables.
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*/
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typedef struct tagAMX {
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unsigned char _FAR *base PACKED; /* points to the AMX header ("amxhdr") plus the code, optionally also the data */
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unsigned char _FAR *data PACKED; /* points to separate data+stack+heap, may be NULL */
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AMX_CALLBACK callback PACKED;
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AMX_DEBUG debug PACKED; /* debug callback */
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/* for external functions a few registers must be accessible from the outside */
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cell cip PACKED; /* instruction pointer: relative to base + amxhdr->cod */
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cell frm PACKED; /* stack frame base: relative to base + amxhdr->dat */
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cell hea PACKED; /* top of the heap: relative to base + amxhdr->dat */
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cell hlw PACKED; /* bottom of the heap: relative to base + amxhdr->dat */
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cell stk PACKED; /* stack pointer: relative to base + amxhdr->dat */
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cell stp PACKED; /* top of the stack: relative to base + amxhdr->dat */
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int flags PACKED; /* current status, see amx_Flags() */
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/* for assertions and debug hook */
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cell curline PACKED;
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cell curfile PACKED;
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int dbgcode PACKED;
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cell dbgaddr PACKED;
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cell dbgparam PACKED;
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char _FAR *dbgname PACKED;
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/* user data */
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long usertags[AMX_USERNUM] PACKED;
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void _FAR *userdata[AMX_USERNUM] PACKED;
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/* native functions can raise an error */
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int error PACKED;
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/* the sleep opcode needs to store the full AMX status */
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cell pri PACKED;
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cell alt PACKED;
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cell reset_stk PACKED;
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cell reset_hea PACKED;
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cell _FAR *syscall_d PACKED; /* relocated value/address for the SYSCALL.D opcode */
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#if defined JIT
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/* support variables for the JIT */
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int reloc_size PACKED; /* required temporary buffer for relocations */
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long code_size PACKED; /* estimated memory footprint of the native code */
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#endif
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} AMX PACKED;
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/* The AMX_HEADER structure is both the memory format as the file format. The
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* structure is used internaly.
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*/
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typedef struct tagAMX_HEADER {
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int32_t size PACKED; /* size of the "file" */
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uint16_t magic PACKED; /* signature */
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char file_version PACKED; /* file format version */
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char amx_version PACKED; /* required version of the AMX */
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int16_t flags PACKED;
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int16_t defsize PACKED; /* size of a definition record */
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int32_t cod PACKED; /* initial value of COD - code block */
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int32_t dat PACKED; /* initial value of DAT - data block */
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int32_t hea PACKED; /* initial value of HEA - start of the heap */
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int32_t stp PACKED; /* initial value of STP - stack top */
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int32_t cip PACKED; /* initial value of CIP - the instruction pointer */
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int32_t publics PACKED; /* offset to the "public functions" table */
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int32_t natives PACKED; /* offset to the "native functions" table */
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int32_t libraries PACKED; /* offset to the table of libraries */
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int32_t pubvars PACKED; /* the "public variables" table */
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int32_t tags PACKED; /* the "public tagnames" table */
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int32_t nametable PACKED; /* name table, file version 7 only */
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} AMX_HEADER PACKED;
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#define AMX_MAGIC 0xf1e0
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enum {
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AMX_ERR_NONE,
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/* reserve the first 15 error codes for exit codes of the abstract machine */
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AMX_ERR_EXIT, /* forced exit */
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AMX_ERR_ASSERT, /* assertion failed */
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AMX_ERR_STACKERR, /* stack/heap collision */
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AMX_ERR_BOUNDS, /* index out of bounds */
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AMX_ERR_MEMACCESS, /* invalid memory access */
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AMX_ERR_INVINSTR, /* invalid instruction */
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AMX_ERR_STACKLOW, /* stack underflow */
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AMX_ERR_HEAPLOW, /* heap underflow */
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AMX_ERR_CALLBACK, /* no callback, or invalid callback */
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AMX_ERR_NATIVE, /* native function failed */
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AMX_ERR_DIVIDE, /* divide by zero */
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AMX_ERR_SLEEP, /* go into sleepmode - code can be restarted */
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AMX_ERR_MEMORY = 16, /* out of memory */
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AMX_ERR_FORMAT, /* invalid file format */
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AMX_ERR_VERSION, /* file is for a newer version of the AMX */
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AMX_ERR_NOTFOUND, /* function not found */
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AMX_ERR_INDEX, /* invalid index parameter (bad entry point) */
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AMX_ERR_DEBUG, /* debugger cannot run */
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AMX_ERR_INIT, /* AMX not initialized (or doubly initialized) */
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AMX_ERR_USERDATA, /* unable to set user data field (table full) */
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AMX_ERR_INIT_JIT, /* cannot initialize the JIT */
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AMX_ERR_PARAMS, /* parameter error */
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AMX_ERR_DOMAIN, /* domain error, expression result does not fit in range */
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};
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enum {
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DBG_INIT, /* query/initialize */
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DBG_FILE, /* file number in curfile, filename in name */
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DBG_LINE, /* line number in curline, file number in curfile */
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DBG_SYMBOL, /* address in dbgaddr, class/type in dbgparam */
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DBG_CLRSYM, /* stack address below which locals should be removed. stack address in stk */
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DBG_CALL, /* function call, address jumped to in dbgaddr */
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DBG_RETURN, /* function returns */
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DBG_TERMINATE, /* program ends, code address in dbgaddr, reason in dbgparam */
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DBG_SRANGE, /* symbol size and dimensions (arrays); level in dbgaddr (!); length in dbgparam */
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DBG_SYMTAG, /* tag of the most recent symbol (if non-zero), tag in dbgparam */
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};
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#define AMX_FLAG_CHAR16 0x01 /* characters are 16-bit */
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#define AMX_FLAG_DEBUG 0x02 /* symbolic info. available */
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#define AMX_FLAG_COMPACT 0x04 /* compact encoding */
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#define AMX_FLAG_BIGENDIAN 0x08 /* big endian encoding */
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#define AMX_FLAG_NOCHECKS 0x10 /* no array bounds checking */
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#define AMX_FLAG_BROWSE 0x4000 /* browsing/relocating or executing */
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#define AMX_FLAG_RELOC 0x8000 /* jump/call addresses relocated */
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#define AMX_EXEC_MAIN -1 /* start at program entry point */
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#define AMX_EXEC_CONT -2 /* continue from last address */
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#define AMX_USERTAG(a,b,c,d) ((a) | ((b)<<8) | ((long)(c)<<16) | ((long)(d)<<24))
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#define AMX_EXPANDMARGIN 64
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/* for native functions that use floating point parameters, the following
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* two macros are convenient for casting a "cell" into a "float" type _without_
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* changing the bit pattern
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*/
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#define amx_ftoc(f) ( * ((cell*)&f) ) /* float to cell */
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#define amx_ctof(c) ( * ((float*)&c) ) /* cell to float */
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#define amx_StrParam(amx,param,result) { \
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cell *amx_cstr_; int amx_length_; \
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amx_GetAddr((amx), (param), &amx_cstr_); \
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amx_StrLen(amx_cstr_, &amx_length_); \
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if (amx_length_ > 0 && \
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((result) = (char*)alloca(amx_length_ + 1)) != NULL) \
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amx_GetString((result), amx_cstr_); \
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else (result) = NULL; \
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}
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uint16_t * AMXAPI amx_Align16(uint16_t *v);
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uint32_t * AMXAPI amx_Align32(uint32_t *v);
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int AMXAPI amx_Allot(AMX *amx, int cells, cell *amx_addr, cell **phys_addr);
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int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params);
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int AMXAPI amx_Cleanup(AMX *amx);
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int AMXAPI amx_Clone(AMX *amxClone, AMX *amxSource, void *data);
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int AMXAPI amx_Debug(AMX *amx); /* default debug procedure, does nothing */
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int AMXAPI amx_Exec(AMX *amx, cell *retval, int index, int numparams, ...);
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int AMXAPI amx_Execv(AMX *amx, cell *retval, int index, int numparams, cell params[]);
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int AMXAPI amx_FindNative(AMX *amx, char *name, int *index);
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int AMXAPI amx_FindPublic(AMX *amx, char *funcname, int *index);
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int AMXAPI amx_FindPubVar(AMX *amx, char *varname, cell *amx_addr);
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int AMXAPI amx_FindTagId(AMX *amx, cell tag_id, char *tagname);
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int AMXAPI amx_Flags(AMX *amx,uint16_t *flags);
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int AMXAPI amx_GetAddr(AMX *amx,cell amx_addr,cell **phys_addr);
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int AMXAPI amx_GetNative(AMX *amx, int index, char *funcname);
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int AMXAPI amx_GetPublic(AMX *amx, int index, char *funcname);
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int AMXAPI amx_GetPubVar(AMX *amx, int index, char *varname, cell *amx_addr);
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int AMXAPI amx_GetString(char *dest,cell *source);
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int AMXAPI amx_GetTag(AMX *amx, int index, char *tagname, cell *tag_id);
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int AMXAPI amx_GetUserData(AMX *amx, long tag, void **ptr);
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int AMXAPI amx_Init(AMX *amx, void *program);
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int AMXAPI amx_InitJIT(AMX *amx, void *reloc_table, void *native_code);
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int AMXAPI amx_MemInfo(AMX *amx, long *codesize, long *datasize, long *stackheap);
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int AMXAPI amx_NameLength(AMX *amx, int *length);
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AMX_NATIVE_INFO * AMXAPI amx_NativeInfo(char *name,AMX_NATIVE func);
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int AMXAPI amx_NumNatives(AMX *amx, int *number);
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int AMXAPI amx_NumPublics(AMX *amx, int *number);
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int AMXAPI amx_NumPubVars(AMX *amx, int *number);
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int AMXAPI amx_NumTags(AMX *amx, int *number);
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int AMXAPI amx_RaiseError(AMX *amx, int error);
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int AMXAPI amx_Register(AMX *amx, AMX_NATIVE_INFO *nativelist, int number);
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int AMXAPI amx_Release(AMX *amx, cell amx_addr);
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int AMXAPI amx_SetCallback(AMX *amx, AMX_CALLBACK callback);
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int AMXAPI amx_SetDebugHook(AMX *amx, AMX_DEBUG debug);
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int AMXAPI amx_SetString(cell *dest, char *source, int pack);
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int AMXAPI amx_SetUserData(AMX *amx, long tag, void *ptr);
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char * AMXAPI amx_StrError(int errnum);
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int AMXAPI amx_StrLen(cell *cstring, int *length);
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#if !defined AMX_NO_ALIGN
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#if defined LINUX
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#pragma pack() /* reset default packing */
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#else
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#pragma pack(pop) /* reset previous packing */
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* __AMX_H */
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