Mercurial > repos > blastem
view backend.h @ 561:666adeba5a61
Save and restore guest address in the write function for a code memory chunk in the "slow" path for inconvenient host addresses. This fixes an intermittent crash on OSX in the code that checks whether the memory written may contain code
author | Mike Pavone <pavone@retrodev.com> |
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date | Mon, 23 Jun 2014 11:46:56 -0400 |
parents | dc9f178085a0 |
children | c8fefa140c80 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #ifndef BACKEND_H_ #define BACKEND_H_ #include <stdint.h> #include <stdio.h> #define INVALID_OFFSET 0xFFFFFFFF #define EXTENSION_WORD 0xFFFFFFFE typedef struct { int32_t disp; uint8_t mode; uint8_t base; uint8_t index; uint8_t cycles; } x86_ea; #if defined(X86_64) || defined(X86_32) typedef uint8_t* code_ptr; #else typedef uint32_t* code_ptr; #endif typedef struct { uint8_t *base; int32_t *offsets; } native_map_slot; typedef struct deferred_addr { struct deferred_addr *next; code_ptr dest; uint32_t address; } deferred_addr; typedef enum { READ_16, READ_8, WRITE_16, WRITE_8 } ftype; typedef struct { uint32_t flags; native_map_slot *native_code_map; deferred_addr *deferred; code_ptr cur_code; code_ptr code_end; uint8_t **ram_inst_sizes; code_ptr save_context; code_ptr load_context; code_ptr handle_cycle_limit; code_ptr handle_cycle_limit_int; uint8_t context_reg; uint8_t scratch1; uint8_t scratch2; } cpu_options; #define MMAP_READ 0x01 #define MMAP_WRITE 0x02 #define MMAP_CODE 0x04 #define MMAP_PTR_IDX 0x08 #define MMAP_ONLY_ODD 0x10 #define MMAP_ONLY_EVEN 0x20 #define MMAP_FUNC_NULL 0x40 typedef uint16_t (*read_16_fun)(uint32_t address, void * context); typedef uint8_t (*read_8_fun)(uint32_t address, void * context); typedef void * (*write_16_fun)(uint32_t address, void * context, uint16_t value); typedef void * (*write_8_fun)(uint32_t address, void * context, uint8_t value); typedef struct { uint32_t start; uint32_t end; uint32_t mask; uint16_t ptr_index; uint16_t flags; void * buffer; read_16_fun read_16; write_16_fun write_16; read_8_fun read_8; write_8_fun write_8; } memmap_chunk; typedef uint8_t * (*native_addr_func)(void * context, uint32_t address); deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest); void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to); void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native); #endif //BACKEND_H_