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75ae9119e6
The engine function pointer to vmMain used variadic arguments but the vmMain function in the dylib has explicit arguments. Evidently the arguments are stored on the stack and/or registers differently. Found by fretn.
203 lines
4.1 KiB
C
203 lines
4.1 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "q_shared.h"
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#include "qcommon.h"
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// Max number of arguments to pass from engine to vm's vmMain function.
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// command number + 12 arguments
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#define MAX_VMMAIN_ARGS 13
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// Max number of arguments to pass from a vm to engine's syscall handler function for the vm.
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// syscall number + 15 arguments
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#define MAX_VMSYSCALL_ARGS 16
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// don't change, this is hardcoded into x86 VMs, opStack protection relies
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// on this
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#define OPSTACK_SIZE 1024
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#define OPSTACK_MASK (OPSTACK_SIZE-1)
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// don't change
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// Hardcoded in q3asm a reserved at end of bss
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#define PROGRAM_STACK_SIZE 0x10000
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#define PROGRAM_STACK_MASK (PROGRAM_STACK_SIZE-1)
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typedef enum {
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OP_UNDEF,
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OP_IGNORE,
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OP_BREAK,
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OP_ENTER,
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OP_LEAVE,
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OP_CALL,
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OP_PUSH,
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OP_POP,
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OP_CONST,
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OP_LOCAL,
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OP_JUMP,
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//-------------------
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OP_EQ,
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OP_NE,
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OP_LTI,
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OP_LEI,
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OP_GTI,
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OP_GEI,
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OP_LTU,
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OP_LEU,
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OP_GTU,
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OP_GEU,
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OP_EQF,
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OP_NEF,
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OP_LTF,
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OP_LEF,
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OP_GTF,
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OP_GEF,
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//-------------------
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OP_LOAD1,
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OP_LOAD2,
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OP_LOAD4,
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OP_STORE1,
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OP_STORE2,
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OP_STORE4, // *(stack[top-1]) = stack[top]
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OP_ARG,
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OP_BLOCK_COPY,
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//-------------------
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OP_SEX8,
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OP_SEX16,
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OP_NEGI,
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OP_ADD,
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OP_SUB,
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OP_DIVI,
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OP_DIVU,
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OP_MODI,
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OP_MODU,
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OP_MULI,
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OP_MULU,
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OP_BAND,
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OP_BOR,
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OP_BXOR,
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OP_BCOM,
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OP_LSH,
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OP_RSHI,
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OP_RSHU,
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OP_NEGF,
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OP_ADDF,
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OP_SUBF,
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OP_DIVF,
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OP_MULF,
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OP_CVIF,
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OP_CVFI
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} opcode_t;
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typedef int vmptr_t;
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typedef struct vmSymbol_s {
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struct vmSymbol_s *next;
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int symValue;
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int profileCount;
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char symName[1]; // variable sized
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} vmSymbol_t;
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#define VM_OFFSET_PROGRAM_STACK 0
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#define VM_OFFSET_SYSTEM_CALL 4
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struct vm_s {
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// DO NOT MOVE OR CHANGE THESE WITHOUT CHANGING THE VM_OFFSET_* DEFINES
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// USED BY THE ASM CODE
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int programStack; // the vm may be recursively entered
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intptr_t (*systemCall)( intptr_t *parms );
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//------------------------------------
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char name[MAX_QPATH];
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void *searchPath; // hint for FS_ReadFileDir()
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// for dynamic linked modules
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void *dllHandle;
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vmMainProc entryPoint;
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void (*destroy)(vm_t* self);
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// for interpreted modules
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qboolean currentlyInterpreting;
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qboolean compiled;
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byte *codeBase;
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int entryOfs;
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int codeLength;
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intptr_t *instructionPointers;
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int instructionCount;
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byte *dataBase;
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int dataMask;
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int dataAlloc; // actually allocated
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int stackBottom; // if programStack < stackBottom, error
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int numSymbols;
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struct vmSymbol_s *symbols;
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int callLevel; // counts recursive VM_Call
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int breakFunction; // increment breakCount on function entry to this
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int breakCount;
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byte *jumpTableTargets;
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int numJumpTableTargets;
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};
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extern vm_t *currentVM;
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extern int vm_debugLevel;
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void VM_Compile( vm_t *vm, vmHeader_t *header );
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int VM_CallCompiled( vm_t *vm, int *args );
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void VM_PrepareInterpreter( vm_t *vm, vmHeader_t *header );
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int VM_CallInterpreted( vm_t *vm, int *args );
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vmSymbol_t *VM_ValueToFunctionSymbol( vm_t *vm, int value );
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int VM_SymbolToValue( vm_t *vm, const char *symbol );
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const char *VM_ValueToSymbol( vm_t *vm, int value );
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void VM_LogSyscalls( int *args );
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void VM_BlockCopy(unsigned int dest, unsigned int src, size_t n);
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