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156 lines
4.7 KiB
C
156 lines
4.7 KiB
C
/********************************************************************************
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* libemu
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*
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* - x86 shellcode emulation -
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*
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*
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* Copyright (C) 2007 Paul Baecher & Markus Koetter
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* 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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*
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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*
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* contact nepenthesdev@users.sourceforge.net
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*
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*******************************************************************************/
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#ifndef HAVE_EMU_MEMORY_H
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#define HAVE_EMU_MEMORY_H
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#include <inttypes.h>
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#include <sys/types.h>
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struct emu;
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struct emu_memory
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{
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struct emu *emu;
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void *mem;
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void *rom;
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uint32_t size;
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uint32_t segment_offset;
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enum emu_segment segment_current;
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uint32_t segment_table[6];
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int read_only_access;
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/* Memory range handlers */
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int memory_handler_count;
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struct emu_memory_handler* mem_handler;
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};
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struct emu_string;
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//struct emu_memory_handler;
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struct emu_memory_handler
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{
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uint32_t mem_start;
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uint32_t mem_end;
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int read_only_access;
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int executable;
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uint8_t (*read8)(uint32_t);
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void (*write8)(uint32_t, uint8_t);
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uint16_t(*read16)(uint32_t);
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void (*write16)(uint32_t, uint16_t);
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uint32_t (*read32)(uint32_t);
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void (*write32)(uint32_t, uint32_t);
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum emu_segment {
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s_cs = 0, s_ss, s_ds, s_es, s_fs, s_gs
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};
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struct emu_memory *emu_memory_new(struct emu *e);
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void emu_memory_clear(struct emu_memory *em);
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void emu_memory_free(struct emu_memory *em);
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void* emu_memory_get_ptr(struct emu *e);
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/* memory handlers for mmio devices */
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int32_t emu_memory_add_handler(struct emu_memory* em, struct emu_memory_handler* h);
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int32_t emu_memory_remove_handler(struct emu_memory* em, uint32_t slot);
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/* read access, these functions return -1 on error */
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int32_t emu_memory_read_byte(struct emu_memory *m, uint32_t addr, uint8_t *byte);
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int32_t emu_memory_read_word(struct emu_memory *m, uint32_t addr, uint16_t *word);
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int32_t emu_memory_read_dword(struct emu_memory *m, uint32_t addr, uint32_t *dword);
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int32_t emu_memory_read_block(struct emu_memory *m, uint32_t addr, void *dest, size_t len);
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int32_t emu_memory_read_string(struct emu_memory *m, uint32_t addr, struct emu_string *s, uint32_t maxsize);
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/* write access */
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int32_t emu_memory_write_byte(struct emu_memory *m, uint32_t addr, uint8_t byte);
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int32_t emu_memory_write_word(struct emu_memory *m, uint32_t addr, uint16_t word);
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int32_t emu_memory_write_dword(struct emu_memory *m, uint32_t addr, uint32_t dword);
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int32_t emu_memory_write_block(struct emu_memory *m, uint32_t addr, void *src, size_t len);
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/* segment selection */
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void emu_memory_segment_select(struct emu_memory *m, enum emu_segment s);
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enum emu_segment emu_memory_segment_get(struct emu_memory *m);
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/* alloc */
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int32_t emu_memory_alloc(struct emu_memory *m, uint32_t *addr, size_t len);
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/*int32_t emu_memory_alloc_at(struct emu_memory *m, uint32_t addr, size_t len);*/
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/* information */
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uint32_t emu_memory_get_usage(struct emu_memory *m);
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void emu_memory_mode_ro(struct emu_memory *m);
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void emu_memory_mode_rw(struct emu_memory *m);
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#define MEM_BYTE_READ(cpu_p, addr, data_p) \
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{ int32_t ret = emu_memory_read_byte((cpu_p)->mem, addr, data_p); \
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if( ret != 0 ) \
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return ret; }
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#define MEM_BYTE_WRITE(cpu_p, addr, data) \
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{ int32_t ret = emu_memory_write_byte((cpu_p)->mem, addr, data); \
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if( ret != 0 ) \
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return ret; }
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#define MEM_WORD_READ(cpu_p, addr, data_p) \
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{ int32_t ret = emu_memory_read_word((cpu_p)->mem, addr, data_p); \
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if( ret != 0 ) \
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return ret; }
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#define MEM_WORD_WRITE(cpu_p, addr, data) \
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{ uint16_t val; \
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bcopy(&(data), &val, 2); \
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int32_t ret = emu_memory_write_word((cpu_p)->mem, addr, val); \
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if( ret != 0 ) \
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return ret; }
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#define MEM_DWORD_READ(cpu_p, addr, data_p) \
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{ int32_t ret = emu_memory_read_dword((cpu_p)->mem, addr, data_p); \
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if( ret != 0 ) \
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return ret; }
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#define MEM_DWORD_WRITE(cpu_p, addr, data) \
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{ uint32_t val; \
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bcopy(&(data), &val, 4); \
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int32_t ret = emu_memory_write_dword((cpu_p)->mem, addr, val); \
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if( ret != 0 ) \
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return ret; }
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#ifdef __cplusplus
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}
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#endif
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#endif // HAVE_EMU_MEMORY_H
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