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New Abstract Machine

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Pavol Marko 2004-02-03 09:24:30 +00:00
parent 72ee3954e4
commit 364f436237
2 changed files with 1143 additions and 695 deletions
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amxmodx/amx.c
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amxmodx/amx.h
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@ -1,23 +1,27 @@
/* Abstract Machine for the Small compiler /* Abstract Machine for the Small compiler
* *
* Copyright (c) ITB CompuPhase, 1997-2002 * Copyright (c) ITB CompuPhase, 1997-2003
* This file may be freely used. No warranties of any kind.
* *
* Version: $Id$ * This software is provided "as-is", without any express or implied warranty.
* In no event will the authors be held liable for any damages arising from
* the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* PM: Whole file changed
*/ */
#if defined LINUX
#if defined __linux__
#include <sclinux.h> #include <sclinux.h>
#endif #endif
#ifndef __AMX_H #ifndef __AMX_H
#define __AMX_H #define __AMX_H
#if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
/* The ISO C99 defines the int16_t and int_32t types. If the compiler got /* The ISO C99 defines the int16_t and int_32t types. If the compiler got
* here, these types are probably undefined. * here, these types are probably undefined.
*/ */
#if defined __LCC__ || defined __linux__ #if defined __LCC__ || defined LINUX
#include <stdint.h> #include <stdint.h>
#else #else
typedef short int int16_t; typedef short int int16_t;
@ -31,27 +35,31 @@
#endif #endif
#endif #endif
#endif #endif
#if defined __WIN32__ || defined _WIN32 || defined WIN32 || defined __MSDOS__
/* Some compilers do not support the #pragma align, which should be fine. Some #if !defined alloca
* compilers give a warning on unknown #pragmas, which is not so fine... #define alloca(n) _alloca(n)
*/ #endif
#if defined SN_TARGET_PS2
#define AMX_NO_ALIGN
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
#endif #endif
/* calling convention for native functions */ /* calling convention for native functions */
#if !defined AMX_NATIVE_CALL #if !defined AMX_NATIVE_CALL
#define AMX_NATIVE_CALL #define AMX_NATIVE_CALL
#endif #endif
/* calling convention for all interface functions and callback functions */ /* calling convention for all interface functions and callback functions */
#if !defined AMXAPI #if !defined AMXAPI
#if defined STDECL
#define AMXAPI __stdcall
#elif defined CDECL
#define AMXAPI __cdecl
#else
#define AMXAPI #define AMXAPI
#endif #endif
#endif
#if !defined AMXEXPORT
#define AMXEXPORT
#endif
/* File format version Required AMX version /* File format version Required AMX version
* 0 (original version) 0 * 0 (original version) 0
* 1 (opcodes JUMP.pri, SWITCH and CASETBL) 1 * 1 (opcodes JUMP.pri, SWITCH and CASETBL) 1
@ -60,10 +68,11 @@ extern "C" {
* 4 (opcodes SWAP.pri/alt and PUSHADDR) 4 * 4 (opcodes SWAP.pri/alt and PUSHADDR) 4
* 5 (tagnames table) 4 * 5 (tagnames table) 4
* 6 (reformatted header) 6 * 6 (reformatted header) 6
* 7 (name table, opcodes SYMTAG & SYSREQ.D) 7
*/ */
#define MIN_FILE_VERSION 6 /* lowest file format version */ #define CUR_FILE_VERSION 7 /* current file version; also the current AMX version */
#define CUR_FILE_VERSION 6 /* current AMX version (parallel with file version) */ #define MIN_FILE_VERSION 6 /* lowest supported file format version for the current AMX version */
#define MIN_AMX_VERSION 7 /* minimum AMX version needed to support the current file format */
#if !defined CELL_TYPE #if !defined CELL_TYPE
#define CELL_TYPE #define CELL_TYPE
#if defined(BIT16) #if defined(BIT16)
@ -74,23 +83,32 @@ extern "C" {
typedef int32_t cell; typedef int32_t cell;
#endif #endif
#endif #endif
struct tagAMX;
struct __amx; typedef cell (AMX_NATIVE_CALL *AMX_NATIVE)(struct tagAMX *amx, cell *params);
typedef cell (AMX_NATIVE_CALL *AMX_NATIVE)(struct __amx *amx, cell *params); typedef int (AMXAPI *AMX_CALLBACK)(struct tagAMX *amx, cell index,
typedef int (AMXAPI *AMX_CALLBACK)(struct __amx *amx, cell index,
cell *result, cell *params); cell *result, cell *params);
typedef int (AMXAPI *AMX_DEBUG)(struct __amx *amx); typedef int (AMXAPI *AMX_DEBUG)(struct tagAMX *amx);
#if !defined FAR #if !defined _FAR
#define FAR #define _FAR
#endif #endif
#if defined _MSC_VER #if defined _MSC_VER
#pragma warning(disable:4103) /* disable warning message 4103 that complains #pragma warning(disable:4103) /* disable warning message 4103 that complains
* about pragma pack in a header file */ * about pragma pack in a header file */
#pragma warning(disable:4100) /* "'%$S' : unreferenced formal parameter" */
#endif
/* Some compilers do not support the #pragma align, which should be fine. Some
* compilers give a warning on unknown #pragmas, which is not so fine...
*/
#if defined SN_TARGET_PS2 || defined __GNUC__
#define AMX_NO_ALIGN
#endif
#if defined __GNUC__
#define PACKED __attribute__((packed))
#else
#define PACKED
#endif #endif
#if !defined AMX_NO_ALIGN #if !defined AMX_NO_ALIGN
#if defined __linux__ #if defined LINUX
#pragma pack(1) /* structures must be packed (byte-aligned) */ #pragma pack(1) /* structures must be packed (byte-aligned) */
#else #else
#pragma pack(push) #pragma pack(push)
@ -100,74 +118,80 @@ typedef int (AMXAPI *AMX_DEBUG)(struct __amx *amx);
#endif #endif
#endif #endif
#endif #endif
typedef struct { typedef struct {
char FAR *name; char _FAR *name PACKED;
AMX_NATIVE func; AMX_NATIVE func PACKED;
} AMX_NATIVE_INFO; } AMX_NATIVE_INFO PACKED;
#define AMX_USERNUM 4 #define AMX_USERNUM 4
#define sEXPMAX 19 #define sEXPMAX 19 /* maximum name length for file version <= 6 */
typedef struct { #define sNAMEMAX 31 /* maximum name length of symbol name */
uint32_t address; typedef struct tagAMX_FUNCSTUB {
char name[sEXPMAX+1]; uint32_t address PACKED;
} AMX_FUNCSTUB; char name[sEXPMAX+1] PACKED;
} AMX_FUNCSTUB PACKED;
/* The AMX structure is the internal structure for many functions. Not all /* The AMX structure is the internal structure for many functions. Not all
* fields are valid at all times; many fields are cached in local variables. * fields are valid at all times; many fields are cached in local variables.
*/ */
typedef struct __amx { typedef struct tagAMX {
unsigned char FAR *base; /* points to the AMX header ("amxhdr") plus the code, optionally also the data */ unsigned char _FAR *base PACKED; /* points to the AMX header ("amxhdr") plus the code, optionally also the data */
unsigned char FAR *data; /* points to separate data+stack+heap, may be NULL */ unsigned char _FAR *data PACKED; /* points to separate data+stack+heap, may be NULL */
AMX_CALLBACK callback; AMX_CALLBACK callback PACKED;
AMX_DEBUG debug; AMX_DEBUG debug PACKED; /* debug callback */
/* for external functions a few registers must be accessible from the outside */ /* for external functions a few registers must be accessible from the outside */
cell cip; /* relative to base + amxhdr->cod */ cell cip PACKED; /* instruction pointer: relative to base + amxhdr->cod */
cell frm; /* relative to base + amxhdr->dat */ cell frm PACKED; /* stack frame base: relative to base + amxhdr->dat */
cell hea, hlw, stk, stp; /* all four are relative to base + amxhdr->dat */ cell hea PACKED; /* top of the heap: relative to base + amxhdr->dat */
int flags; /* current status, see amx_Flags() */ cell hlw PACKED; /* bottom of the heap: relative to base + amxhdr->dat */
cell stk PACKED; /* stack pointer: relative to base + amxhdr->dat */
cell stp PACKED; /* top of the stack: relative to base + amxhdr->dat */
int flags PACKED; /* current status, see amx_Flags() */
/* for assertions and debug hook */ /* for assertions and debug hook */
cell curline, curfile; cell curline PACKED;
int dbgcode; cell curfile PACKED;
cell dbgaddr, dbgparam; int dbgcode PACKED;
char FAR *dbgname; cell dbgaddr PACKED;
cell dbgparam PACKED;
char _FAR *dbgname PACKED;
/* user data */ /* user data */
long usertags[AMX_USERNUM]; long usertags[AMX_USERNUM] PACKED;
void FAR *userdata[AMX_USERNUM]; void _FAR *userdata[AMX_USERNUM] PACKED;
/* native functions can raise an error */ /* native functions can raise an error */
int error; int error PACKED;
/* the sleep opcode needs to store the full AMX status */ /* the sleep opcode needs to store the full AMX status */
cell pri, alt, reset_stk, reset_hea; cell pri PACKED;
cell alt PACKED;
cell reset_stk PACKED;
cell reset_hea PACKED;
cell _FAR *syscall_d PACKED; /* relocated value/address for the SYSCALL.D opcode */
#if defined JIT #if defined JIT
/* support variables for the JIT */ /* support variables for the JIT */
int reloc_size; /* required temporary buffer for relocations */ int reloc_size PACKED; /* required temporary buffer for relocations */
long code_size; /* estimated memory footprint of the native code */ long code_size PACKED; /* estimated memory footprint of the native code */
#endif #endif
} AMX; } AMX PACKED;
/* The AMX_HEADER structure is both the memory format as the file format. The /* The AMX_HEADER structure is both the memory format as the file format. The
* structure is used internaly. * structure is used internaly.
*/ */
typedef struct __amx_header { typedef struct tagAMX_HEADER {
int32_t size; /* size of the "file" */ int32_t size PACKED; /* size of the "file" */
uint16_t magic; /* signature */ uint16_t magic PACKED; /* signature */
char file_version; /* file format version */ char file_version PACKED; /* file format version */
char amx_version; /* required version of the AMX */ char amx_version PACKED; /* required version of the AMX */
int16_t flags; int16_t flags PACKED;
int16_t defsize; int16_t defsize PACKED; /* size of a definition record */
int32_t cod; /* initial value of COD - code block */ int32_t cod PACKED; /* initial value of COD - code block */
int32_t dat; /* initial value of DAT - data block */ int32_t dat PACKED; /* initial value of DAT - data block */
int32_t hea; /* initial value of HEA - start of the heap */ int32_t hea PACKED; /* initial value of HEA - start of the heap */
int32_t stp; /* initial value of STP - stack top */ int32_t stp PACKED; /* initial value of STP - stack top */
int32_t cip; /* initial value of CIP - the instruction pointer */ int32_t cip PACKED; /* initial value of CIP - the instruction pointer */
int32_t publics; /* offset to the "public functions" table */ int32_t publics PACKED; /* offset to the "public functions" table */
int32_t natives; /* offset to the "native functions" table */ int32_t natives PACKED; /* offset to the "native functions" table */
int32_t libraries; /* offset to the table of libraries */ int32_t libraries PACKED; /* offset to the table of libraries */
int32_t pubvars; /* the "public variables" table */ int32_t pubvars PACKED; /* the "public variables" table */
int32_t tags; /* the "public tagnames" table */ int32_t tags PACKED; /* the "public tagnames" table */
} AMX_HEADER; int32_t nametable PACKED; /* name table, file version 7 only */
} AMX_HEADER PACKED;
#define AMX_MAGIC 0xf1e0 #define AMX_MAGIC 0xf1e0
enum { enum {
AMX_ERR_NONE, AMX_ERR_NONE,
/* reserve the first 15 error codes for exit codes of the abstract machine */ /* reserve the first 15 error codes for exit codes of the abstract machine */
@ -183,7 +207,6 @@ enum {
AMX_ERR_NATIVE, /* native function failed */ AMX_ERR_NATIVE, /* native function failed */
AMX_ERR_DIVIDE, /* divide by zero */ AMX_ERR_DIVIDE, /* divide by zero */
AMX_ERR_SLEEP, /* go into sleepmode - code can be restarted */ AMX_ERR_SLEEP, /* go into sleepmode - code can be restarted */
AMX_ERR_MEMORY = 16, /* out of memory */ AMX_ERR_MEMORY = 16, /* out of memory */
AMX_ERR_FORMAT, /* invalid file format */ AMX_ERR_FORMAT, /* invalid file format */
AMX_ERR_VERSION, /* file is for a newer version of the AMX */ AMX_ERR_VERSION, /* file is for a newer version of the AMX */
@ -194,8 +217,8 @@ enum {
AMX_ERR_USERDATA, /* unable to set user data field (table full) */ AMX_ERR_USERDATA, /* unable to set user data field (table full) */
AMX_ERR_INIT_JIT, /* cannot initialize the JIT */ AMX_ERR_INIT_JIT, /* cannot initialize the JIT */
AMX_ERR_PARAMS, /* parameter error */ AMX_ERR_PARAMS, /* parameter error */
AMX_ERR_DOMAIN, /* domain error, expression result does not fit in range */
}; };
enum { enum {
DBG_INIT, /* query/initialize */ DBG_INIT, /* query/initialize */
DBG_FILE, /* file number in curfile, filename in name */ DBG_FILE, /* file number in curfile, filename in name */
@ -206,33 +229,50 @@ enum {
DBG_RETURN, /* function returns */ DBG_RETURN, /* function returns */
DBG_TERMINATE, /* program ends, code address in dbgaddr, reason in dbgparam */ DBG_TERMINATE, /* program ends, code address in dbgaddr, reason in dbgparam */
DBG_SRANGE, /* symbol size and dimensions (arrays); level in dbgaddr (!); length in dbgparam */ DBG_SRANGE, /* symbol size and dimensions (arrays); level in dbgaddr (!); length in dbgparam */
DBG_SYMTAG, /* tag of the most recent symbol (if non-zero), tag in dbgparam */
}; };
#define AMX_FLAG_CHAR16 0x01 /* characters are 16-bit */ #define AMX_FLAG_CHAR16 0x01 /* characters are 16-bit */
#define AMX_FLAG_DEBUG 0x02 /* symbolic info. available */ #define AMX_FLAG_DEBUG 0x02 /* symbolic info. available */
#define AMX_FLAG_COMPACT 0x04 /* compact encoding */ #define AMX_FLAG_COMPACT 0x04 /* compact encoding */
#define AMX_FLAG_BIGENDIAN 0x08 /* big endian encoding */ #define AMX_FLAG_BIGENDIAN 0x08 /* big endian encoding */
#define AMX_FLAG_BROWSE 0x4000 #define AMX_FLAG_NOCHECKS 0x10 /* no array bounds checking */
#define AMX_FLAG_BROWSE 0x4000 /* browsing/relocating or executing */
#define AMX_FLAG_RELOC 0x8000 /* jump/call addresses relocated */ #define AMX_FLAG_RELOC 0x8000 /* jump/call addresses relocated */
#define AMX_EXEC_MAIN -1 /* start at program entry point */ #define AMX_EXEC_MAIN -1 /* start at program entry point */
#define AMX_EXEC_CONT -2 /* continue from last address */ #define AMX_EXEC_CONT -2 /* continue from last address */
#define AMX_USERTAG(a,b,c,d) ((a) | ((b)<<8) | ((long)(c)<<16) | ((long)(d)<<24)) #define AMX_USERTAG(a,b,c,d) ((a) | ((b)<<8) | ((long)(c)<<16) | ((long)(d)<<24))
#define AMX_EXPANDMARGIN 64
/* for native functions that use floating point parameters, the following
* two macros are convenient for casting a "cell" into a "float" type _without_
* changing the bit pattern
*/
#define amx_ftoc(f) ( * ((cell*)&f) ) /* float to cell */
#define amx_ctof(c) ( * ((float*)&c) ) /* cell to float */
#define amx_StrParam(amx,param,result) { \
cell *amx_cstr_; int amx_length_; \
amx_GetAddr((amx), (param), &amx_cstr_); \
amx_StrLen(amx_cstr_, &amx_length_); \
if (amx_length_ > 0 && \
((result) = (char*)alloca(amx_length_ + 1)) != NULL) \
amx_GetString((result), amx_cstr_); \
else (result) = NULL; \
}
uint16_t * AMXAPI amx_Align16(uint16_t *v); uint16_t * AMXAPI amx_Align16(uint16_t *v);
uint32_t * AMXAPI amx_Align32(uint32_t *v); uint32_t * AMXAPI amx_Align32(uint32_t *v);
int AMXAPI amx_Allot(AMX *amx, int cells, cell *amx_addr, cell **phys_addr); int AMXAPI amx_Allot(AMX *amx, int cells, cell *amx_addr, cell **phys_addr);
int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params); int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, cell *params);
int AMXAPI amx_Cleanup(AMX *amx);
int AMXAPI amx_Clone(AMX *amxClone, AMX *amxSource, void *data); int AMXAPI amx_Clone(AMX *amxClone, AMX *amxSource, void *data);
int AMXAPI amx_Debug(AMX *amx); /* default debug procedure, does nothing */ int AMXAPI amx_Debug(AMX *amx); /* default debug procedure, does nothing */
int AMXAPI amx_Exec(AMX *amx, cell *retval, int index, int numparams, ...); int AMXAPI amx_Exec(AMX *amx, cell *retval, int index, int numparams, ...);
int AMXAPI amx_Execv(AMX *amx, cell *retval, int index, int numparams, cell params[]); int AMXAPI amx_Execv(AMX *amx, cell *retval, int index, int numparams, cell params[]);
int AMXAPI amx_FindNative(AMX *amx, char *name, int *index);
int AMXAPI amx_FindPublic(AMX *amx, char *funcname, int *index); int AMXAPI amx_FindPublic(AMX *amx, char *funcname, int *index);
int AMXAPI amx_FindPubVar(AMX *amx, char *varname, cell *amx_addr); int AMXAPI amx_FindPubVar(AMX *amx, char *varname, cell *amx_addr);
int AMXAPI amx_FindTagId(AMX *amx, cell tag_id, char *tagname); int AMXAPI amx_FindTagId(AMX *amx, cell tag_id, char *tagname);
int AMXAPI amx_Flags(AMX *amx,uint16_t *flags); int AMXAPI amx_Flags(AMX *amx,uint16_t *flags);
int AMXAPI amx_GetAddr(AMX *amx,cell amx_addr,cell **phys_addr); int AMXAPI amx_GetAddr(AMX *amx,cell amx_addr,cell **phys_addr);
int AMXAPI amx_GetNative(AMX *amx, int index, char *funcname);
int AMXAPI amx_GetPublic(AMX *amx, int index, char *funcname); int AMXAPI amx_GetPublic(AMX *amx, int index, char *funcname);
int AMXAPI amx_GetPubVar(AMX *amx, int index, char *varname, cell *amx_addr); int AMXAPI amx_GetPubVar(AMX *amx, int index, char *varname, cell *amx_addr);
int AMXAPI amx_GetString(char *dest,cell *source); int AMXAPI amx_GetString(char *dest,cell *source);
@ -243,6 +283,7 @@ int AMXAPI amx_InitJIT(AMX *amx, void *reloc_table, void *native_code);
int AMXAPI amx_MemInfo(AMX *amx, long *codesize, long *datasize, long *stackheap); int AMXAPI amx_MemInfo(AMX *amx, long *codesize, long *datasize, long *stackheap);
int AMXAPI amx_NameLength(AMX *amx, int *length); int AMXAPI amx_NameLength(AMX *amx, int *length);
AMX_NATIVE_INFO * AMXAPI amx_NativeInfo(char *name,AMX_NATIVE func); AMX_NATIVE_INFO * AMXAPI amx_NativeInfo(char *name,AMX_NATIVE func);
int AMXAPI amx_NumNatives(AMX *amx, int *number);
int AMXAPI amx_NumPublics(AMX *amx, int *number); int AMXAPI amx_NumPublics(AMX *amx, int *number);
int AMXAPI amx_NumPubVars(AMX *amx, int *number); int AMXAPI amx_NumPubVars(AMX *amx, int *number);
int AMXAPI amx_NumTags(AMX *amx, int *number); int AMXAPI amx_NumTags(AMX *amx, int *number);
@ -253,19 +294,16 @@ int AMXAPI amx_SetCallback(AMX *amx, AMX_CALLBACK callback);
int AMXAPI amx_SetDebugHook(AMX *amx, AMX_DEBUG debug); int AMXAPI amx_SetDebugHook(AMX *amx, AMX_DEBUG debug);
int AMXAPI amx_SetString(cell *dest, char *source, int pack); int AMXAPI amx_SetString(cell *dest, char *source, int pack);
int AMXAPI amx_SetUserData(AMX *amx, long tag, void *ptr); int AMXAPI amx_SetUserData(AMX *amx, long tag, void *ptr);
char * AMXAPI amx_StrError(int errnum);
int AMXAPI amx_StrLen(cell *cstring, int *length); int AMXAPI amx_StrLen(cell *cstring, int *length);
#if !defined AMX_NO_ALIGN #if !defined AMX_NO_ALIGN
#if defined __linux__ #if defined LINUX
#pragma pack() /* reset default packing */ #pragma pack() /* reset default packing */
#else #else
#pragma pack(pop) /* reset previous packing */ #pragma pack(pop) /* reset previous packing */
#endif #endif
#endif #endif
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif
#endif /* __AMX_H */ #endif /* __AMX_H */