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8086-system
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[submodule "8086"]
path = 8086
url = https://zpc@www.codecode.net/engintime/Dream-Logic/Intel-classic-chips/8086.git
8086 @ 0646239b
Subproject commit 0646239b4d1645f6a0da63d7f4bb3142942e567c
8086-system.dlproj 0 → 100644
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<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<project id="3407fe40-bd78-42b5-914a-e269ea66b67f" name="8086-system" version="1">
<files>
<filefolder id="d7502e9e-b220-4715-a645-2f139d9b4f34" name="MEM">
<file relativepath="MEM\MEM.dlsche"/>
<file relativepath="MEM\ram.asm"/>
<file relativepath="MEM\ram.bat"/>
<file relativepath="MEM\ram.rxm"/>
<file relativepath="MEM\README.md"/>
</filefolder>
<filefolder id="c6ec748e-8eff-4fcb-9ff0-d62ba30af439" name="IO">
<file relativepath="IO\IO.dlsche"/>
<file relativepath="IO\README.md"/>
</filefolder>
<filefolder id="2dba22d3-e260-4b98-98d1-e33b244c953d" name="8086">
<file relativepath="8086\8086.dlsche"/>
<file relativepath="8086\8086.pdf"/>
<file relativepath="8086\ALU.dlsche"/>
<file relativepath="8086\BRANCH.dlsche"/>
<file relativepath="8086\CU.dlsche"/>
<file relativepath="8086\FLAG.dlsche"/>
<file relativepath="8086\PC.dlsche"/>
<file relativepath="8086\README.md"/>
<file relativepath="8086\REGS.dlsche"/>
<file relativepath="8086\rom.bat"/>
<file relativepath="8086\rom.masm"/>
<file relativepath="8086\rom.rxm"/>
<file relativepath="8086\uPC_NEXT.dlsche"/>
</filefolder>
<file relativepath="top.dlsche"/>
<file relativepath="README.md"/>
</files>
</project>
IO/IO.dlsche 0 → 100644
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="697">(80H~87H)</text>
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="787">(98H~9FH)</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="817">(A0H~A7H)</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="847">(A8H~AFH)</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="877">(B0H~B7H)</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="22" font-weight="400" text-anchor="start" x="1436" y="907">(B8H~BFH)</text>
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IO/README.md 0 → 100644
浏览文件 @ da310816
# 说明
IO接口芯片地址译码模块
\ No newline at end of file
MEM/MEM.dlsche 0 → 100644
浏览文件 @ da310816
添加文件
MEM/MEM.dlsche.svg 0 → 100644
浏览文件 @ da310816
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<text alignment-baseline="after-edge" fill="#000080" font-family="宋体" font-size="25" font-weight="400" text-anchor="start" x="21" y="1312">MIO为高电平表示访问存储器</text>
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<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="592">A6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="612" y2="612"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="612">A7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="672" y2="672"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="672">D0</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="692" y2="692"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="692">D1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="712" y2="712"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="712">D2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="732" y2="732"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="732">D3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="752" y2="752"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="752">D4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="772" y2="772"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="772">D5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="792" y2="792"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="792">D6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="812" y2="812"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="624" y="812">D7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="472" y2="472"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="472">Q0</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="492" y2="492"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="492">Q1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="512" y2="512"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="512">Q2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="532" y2="532"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="532">Q3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="552" y2="552"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="552">Q4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="572" y2="572"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="572">Q5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="592" y2="592"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="592">Q6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="741" x2="791" y1="612" y2="612"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="708" y="612">Q7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="581" x2="541" y1="872" y2="872"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="657" y="872">^W\R</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="591" x2="541" y1="892" y2="892"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="644" y="892">CLK</text>
<rect fill="#ff8057" fill-opacity="0.5" height="490" stroke="#000000" stroke-width="5" width="150" x="591" y="442"/>
<polyline fill="none" points="591 882, 601 892, 591 902" stroke="#000000" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
<circle cx="586" cy="872" fill="none" r="5" stroke="#000000" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="90" font-weight="700" text-anchor="start" x="551" y="432">RAM</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="611" y="972">256RAM1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="472" y2="472"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="472">A0</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="502" y2="502"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="502">A1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="532" y2="532"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="532">A2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="562" y2="562"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="562">A3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="592" y2="592"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="592">A4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="622" y2="622"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="622">A5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="652" y2="652"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="652">A6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1231" x2="1181" y1="682" y2="682"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1264" y="682">A7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="472" y2="472"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="472">D0</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="502" y2="502"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="502">D1</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="532" y2="532"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="532">D2</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="562" y2="562"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="562">D3</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="592" y2="592"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="592">D4</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="622" y2="622"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="622">D5</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="652" y2="652"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="652">D6</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1381" x2="1431" y1="682" y2="682"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="start" x="1348" y="682">D7</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1221" x2="1181" y1="742" y2="742"/>
<text alignment-baseline="central" fill="#000000" font-family="Courier New" font-size="17" font-weight="400" text-anchor="end" x="1275" y="741">^EN</text>
<rect fill="#a0c0ff" fill-opacity="0.5" height="350" stroke="#000000" stroke-width="5" width="150" x="1231" y="432"/>
<circle cx="1226" cy="742" fill="none" r="5" stroke="#000000" stroke-width="5"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1231" y="422">MEM_gate</text>
<text alignment-baseline="after-edge" fill="#000000" font-family="Arial" font-size="25" font-weight="700" text-anchor="start" x="1231" y="832">BUS_TRANS8</text>
<circle cx="521" cy="1172" fill="#0000ff" r="8" stroke="#0000ff" stroke-width="5"/>
</svg>
MEM/README.md 0 → 100644
浏览文件 @ da310816
# 说明
8086 微机系统的MEM主存储器，存储指令和数据
\ No newline at end of file
MEM/dmasm.c 0 → 100644
浏览文件 @ da310816
/*******************************************************************************
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
typedef unsigned char BYTE;
typedef long BOOL;
#define FALSE 0
#define TRUE 1
#define MAX_LINE_LENGTH 256 // 一行代码最多可以有多少个字符
#define MAX_LINE_COUNT 1024 // 源代码文件最多可以有多少行
#define MAX_MACHINE_CODE_BYTE_COUNT 256 // 源代码编译后最多可以有多少个字节机器码
#define MAX_SYMBOL_LENGTH 64 // 一个符号最多可以包含多少个字符
#define MAX_SYMBOL_COUNT 256 // 源代码文件中最多可以包含多少个符号
#ifndef MAX_PATH
#define MAX_PATH 256 // 文件路径最多可以包含多少个字符
#endif
// 代码行数据库。记录源代码文件中所有代码行的信息（包括注释行、空行）
struct LINE_RECORD
{
char line_string[MAX_LINE_LENGTH]; // 代码行的内容
unsigned long line_num; // 行号
unsigned long address; // 此行代码转换的机器码在映像文件中的地址（偏移）
int machine_code_count; // 此行代码转换的机器码的字节数量
unsigned long flag; // 代码行标志位，32位
};
struct LINE_RECORD line_database[MAX_LINE_COUNT] = { 0 };
int line_count = 0;
int machine_code_line_count = 0; // 记录产生了机器码的代码行的数量
// 在此定义所有的代码行标志位。注意，代码行标志位是按位或的关系。
#define LF_INSTRUCTION 0x00000001 // 代码行标志位的最低位是1，表示此行是一条指令，否则表示此行是数据
// 重定位表。如果指令中使用了标号、变量名等符号，在第一次扫描时无法确定他们的地址，需要
// 在第二次扫描时进行重定位。
struct REALLOCATE
{
unsigned long address; // 第一次扫描时，在这里记录了需要重定位的机器码的地址（偏移），
// 第二次扫描时，根据符号的地址进行重定位。
char symbol_name[MAX_SYMBOL_LENGTH]; // 需要重定位的符号名称。
int line_num; // 行号。
};
struct REALLOCATE reallocate_table[MAX_LINE_COUNT] = { 0 };
int reallocate_count = 0;
// 符号表。符号包括源代码中的标号、变量名。
struct SYMBOL
{
char name[MAX_SYMBOL_LENGTH]; // 符号名称
unsigned long address; // 符号表示的地址。重定位时需要用到。
int machine_code_count; // 符号生成的机器码的数量（以字节为单位）。
int line_num; // 行号
int ref_count; // 引用计数
};
struct SYMBOL symbol_table[MAX_SYMBOL_COUNT] = { 0 };
int symbol_count = 0;
// 汇编过程的状态
enum
{
AS_BEGIN // 起始状态。在遇到代码段名称前，处于此状态
, AS_INT_TABLE // 正在处理中断向量列表。遇到向量列表名称后，遇到代码段名称前，处于此状态
, AS_TEXT // 正在处理代码段。遇到代码段名称后，遇到数据的名称前，处于此状态
, AS_DATA // 正在处理数据段。遇到数据段名称后，处于此状态
};
unsigned long assembler_state = AS_BEGIN;
//
// 在下面定义所有的关键字
//
// 段名称
const char* int_table_section_keyword = ".int_table"; // 中断向量列表标志
const char* code_section_keyword = ".text"; // 代码段标志
char const* data_section_keyword = ".data"; // 数据段标志
// 指令名称
const char* mov_instruction_keyword = "mov";
const char* add_instruction_keyword = "add";
const char* adc_instruction_keyword = "adc";
const char* sub_instruction_keyword = "sub";
const char* sbb_instruction_keyword = "sbb";
const char* and_instruction_keyword = "and";
const char* or_instruction_keyword = "or";
const char* xor_instruction_keyword = "xor";
const char* shr_instruction_keyword = "shr";
const char* shl_instruction_keyword = "shl";
const char* rcr_instruction_keyword = "rcr";
const char* rcl_instruction_keyword = "rcl";
const char* sal_instruction_keyword = "sal";
const char* sar_instruction_keyword = "sar";
const char* rol_instruction_keyword = "rol";
const char* ror_instruction_keyword = "ror";
const char* not_instruction_keyword = "not";
const char* push_instruction_keyword = "push";
const char* pop_instruction_keyword = "pop";
const char* in_instruction_keyword = "in";
const char* out_instruction_keyword = "out";
const char* call_instruction_keyword = "call";
const char* ret_instruction_keyword = "ret";
const char* int_instruction_keyword = "int";
const char* iret_instruction_keyword = "iret";
const char* inc_instruction_keyword = "inc";
const char* dec_instruction_keyword = "dec";
const char* lea_instruction_keyword = "lea";
const char* cmp_instruction_keyword = "cmp";
const char* nop_instruction_keyword = "nop";
const char* cli_instruction_keyword = "cli";
const char* sti_instruction_keyword = "sti";
const char* jmp_instruction_keyword = "jmp";
const char* jc_instruction_keyword = "jc";
const char* jz_instruction_keyword = "jz";
const char* je_instruction_keyword = "je";
const char* jne_instruction_keyword = "jne";
const char* jnz_instruction_keyword = "jnz";
// 通用寄存器名称
const char* al_register_keyword = "al";
const char* bl_register_keyword = "bl";
const char* cl_register_keyword = "cl";
const char* dl_register_keyword = "dl";
const char* sp_register_keyword = "sp";
const char* bp_register_keyword = "bp";
const char* si_register_keyword = "si";
const char* di_register_keyword = "di";
const char* cs_register_keyword = "cs";
const char* ds_register_keyword = "ds";
const char* ss_register_keyword = "ss";
const char* es_register_keyword = "es";
const char* al_register_indirect_keyword = "[al]";
const char* bl_register_indirect_keyword = "[bl]";
const char* cl_register_indirect_keyword = "[cl]";
const char* dl_register_indirect_keyword = "[dl]";
const char* sp_register_indirect_keyword = "[sp]";
const char* bp_register_indirect_keyword = "[bp]";
const char* si_register_indirect_keyword = "[si]";
const char* di_register_indirect_keyword = "[di]";
const char* cs_register_indirect_keyword = "[cs]";
const char* ds_register_indirect_keyword = "[ds]";
const char* ss_register_indirect_keyword = "[ss]";
const char* es_register_indirect_keyword = "[es]";
const char* delimit_char = "\n\t\r "; // 需要忽略的空白字符
const char* delimit_char_comma = "\n\t\r, "; // 需要忽略的空白字符，包括英文逗号
// 汇编产生的机器码
#define MAX_MACHINE_CODE 1024
BYTE machine_code[MAX_MACHINE_CODE];
unsigned long machine_code_address = 0;
unsigned long machine_code_old_address = 0;
const char* assembly_file_name = NULL; // 汇编文件路径
const char* target_file_name = NULL; // 目标文件路径
const char* list_file_name = NULL; // 列表文件路径
const char* dbg_file_name = NULL; // 调试信息文件路径
const unsigned long dbg_file_magic = 58;
const unsigned long dbg_file_version = 1;
// 输出汇编过程中发现的语法错误信息
void error_msg(const char* error_msg, int line_num)
{
if (line_num >= 1)
{
printf("%s:%d: error: %s\n", assembly_file_name, line_num, error_msg);
}
else
{
printf("%s: error: %s\n", assembly_file_name, error_msg);
}
exit(1);
}
char formated_msg[1024]; // 将格式化后的错误信息放在此字符串中。
void error_msg_miss_op(const char* instruction_name, int line_num)
{
sprintf(formated_msg, "%s 指令缺少操作数。", instruction_name);
error_msg(formated_msg, line_num);
}
void error_msg_wrong_op(const char* instruction_name, int line_num)
{
sprintf(formated_msg, "%s 指令不支持这样的操作数。", instruction_name);
error_msg(formated_msg, line_num);
}
void error_msg_same_symbol(const char* symbol, int line_num, int ref_line_num)
{
sprintf(formated_msg, "符号 %s 重复定义。参见第 %d 行。", symbol, ref_line_num);
error_msg(formated_msg, line_num);
}
void error_msg_keyword_symbol(const char* symbol, int line_num)
{
sprintf(formated_msg, "不能使用保留的关键字 %s 作为符号名称。", symbol);
error_msg(formated_msg, line_num);
}
void error_msg_keyword_int_vector(const char* vector, int line_num)
{
sprintf(formated_msg, "不能使用保留的关键字 %s 作为中断向量名称。", vector);
error_msg(formated_msg, line_num);
}
void error_msg_wrong_data(const char* data, int line_num)
{
sprintf(formated_msg, "%s 不是有效的数据。", data);
error_msg(formated_msg, line_num);
}
// 输出汇编过程中发现的警告信息
void warning_msg(const char* warning_msg, int line_num)
{
if (line_num >= 1)
{
printf("%s:%d: warning: %s\n", assembly_file_name, line_num, warning_msg);
}
else
{
printf("%s: warning: %s\n", assembly_file_name, warning_msg);
}
}
void warning_msg_invalid_line(int line_num)
{
warning_msg("忽略无效的代码行。", line_num);
}
void warning_msg_unref_symbol(const char* symbol, int line_num)
{
sprintf(formated_msg, "符号 %s 未被引用。", symbol);
warning_msg(formated_msg, line_num);
}
// 判断是否是立即数。如果是数字开头，或者是负号开头的，就认为是立即数。
int is_immediate(const char* token)
{
return (isdigit(token[0]) || '-' == token[0]) ? 1 : 0;
}
// 判断是否是立即数地址。类如，[4]
int is_immediate_address(const char* token)
{
// 最后一个字符必须是"]"
if (token[strlen(token) - 1] != ']')
{
return 0;
}
// 第一个字符必须是"["
if (token[0] != '[')
{
return 0;
}
// 后面的字符必须是数字开头
return (isdigit(token[1]) || ' ' == token[1]) ? 1 : 0;
}
// 判断是否是主存数据
int is_main_memory(const char* token)
{
return (isdigit(token[0]) || '@' == token[0]) ? 1 : 0;
}
// 指令操作数类型
enum
{
OT_REGISTER_AL // al
, OT_REGISTER_BL // bl
, OT_REGISTER_CL // cl
, OT_REGISTER_DL // dl
, OT_REGISTER_SP // sp
, OT_REGISTER_BP // bp
, OT_REGISTER_SI // si
, OT_REGISTER_DI // di
, OT_REGISTER_CS // cs
, OT_REGISTER_DS // ds
, OT_REGISTER_SS // ss
, OT_REGISTER_ES // es
, OT_REGISTER_AL_INDIRECT // [al]
, OT_REGISTER_BL_INDIRECT // [bl]
, OT_REGISTER_CL_INDIRECT // [cl]
, OT_REGISTER_DL_INDIRECT // [dl]
, OT_REGISTER_SP_INDIRECT // [sp]
, OT_REGISTER_BP_INDIRECT // [bp]
, OT_REGISTER_SI_INDIRECT // [si]
, OT_REGISTER_DI_INDIRECT // [di]
, OT_REGISTER_CS_INDIRECT // [cs]
, OT_REGISTER_DS_INDIRECT // [ds]
, OT_REGISTER_SS_INDIRECT // [ss]
, OT_REGISTER_ES_INDIRECT // [es]
, OT_IMMEDIATE // 立即数
, OT_SYMBOL // 符号
};
// 得到指令操作数的类型
unsigned long get_operand_type(const char* op)
{
unsigned long op_type;
if (stricmp(op, al_register_keyword) == 0)
{
op_type = OT_REGISTER_AL;
}
else if (stricmp(op, bl_register_keyword) == 0)
{
op_type = OT_REGISTER_BL;
}
else if (stricmp(op, cl_register_keyword) == 0)
{
op_type = OT_REGISTER_CL;
}
else if (stricmp(op, dl_register_keyword) == 0)
{
op_type = OT_REGISTER_DL;
}
else if (stricmp(op, sp_register_keyword) == 0)
{
op_type = OT_REGISTER_SP;
}
else if (stricmp(op, bp_register_keyword) == 0)
{
op_type = OT_REGISTER_BP;
}
else if (stricmp(op, si_register_keyword) == 0)
{
op_type = OT_REGISTER_SI;
}
else if (stricmp(op, di_register_keyword) == 0)
{
op_type = OT_REGISTER_DI;
}
else if (stricmp(op, cs_register_keyword) == 0)
{
op_type = OT_REGISTER_CS;
}
else if (stricmp(op, ds_register_keyword) == 0)
{
op_type = OT_REGISTER_DS;
}
else if (stricmp(op, ss_register_keyword) == 0)
{
op_type = OT_REGISTER_SS;
}
else if (stricmp(op, es_register_keyword) == 0)
{
op_type = OT_REGISTER_ES;
}
else if (stricmp(op, al_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_AL_INDIRECT;
}
else if (stricmp(op, bl_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_BL_INDIRECT;
}
else if (stricmp(op, cl_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_CL_INDIRECT;
}
else if (stricmp(op, dl_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_DL_INDIRECT;
}
else if (stricmp(op, sp_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_SP_INDIRECT;
}
else if (stricmp(op, bp_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_BP_INDIRECT;
}
else if (stricmp(op, si_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_SI_INDIRECT;
}
else if (stricmp(op, di_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_DI_INDIRECT;
}
else if (stricmp(op, cs_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_CS_INDIRECT;
}
else if (stricmp(op, ds_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_DS_INDIRECT;
}
else if (stricmp(op, ss_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_SS_INDIRECT;
}
else if (stricmp(op, es_register_indirect_keyword) == 0)
{
op_type = OT_REGISTER_ES_INDIRECT;
}
else if (is_immediate(op))
{
op_type = OT_IMMEDIATE;
}
else
{
op_type = OT_SYMBOL;
}
return op_type;
}
// 根据寄存器，得到一个机器码
char get_machine_code_from_r(unsigned long op_type)
{
return (char)(op_type - OT_REGISTER_AL);
}
// 根据通用寄存器和机器码的基础值，得到一个机器码
char get_machine_code_from_r_indirect(unsigned long op_type)
{
return (char)(op_type - OT_REGISTER_AL_INDIRECT);
}
// 根据立即数得到一个机器码。注意，允许使用负数，所以返回值是带符号的 8 位 char。
char get_machine_code_from_immediate(const char* immediate)
{
char* end;
int start_index = (immediate[0] == '-' ? 1 : 0);
int base = (immediate[start_index] == '0' && (immediate[start_index + 1] == 'x' || immediate[start_index + 1] == 'X')) ? 16 : 10;
return (char)strtol(immediate, &end, base);
}
// 根据立即数地址得到一个机器码。首先去除中括号，再将立即数转换为带符号的8位字符。
char get_machine_code_from_immediate_address(const char* immediate)
{
char d[7];
int i = 0;
int t = strlen(immediate);
for (; i < t - 2; i++)
{
d[i] = immediate[i + 1];
}
char* temp;
int base = (immediate[1] == '0' && (immediate[2] == 'x' || immediate[2] == 'X')) ? 16 : 10;
return (char)strtol(d, &temp, base);
}
// 向重定位表中添加一个重定位信息
void add_reallocate(const char* symbol, int line_num)
{
reallocate_table[reallocate_count].address = machine_code_address;
strcpy(reallocate_table[reallocate_count].symbol_name, symbol);
reallocate_table[reallocate_count].line_num = line_num;
reallocate_count++;
}
//////////////////////////////////////////////////////////////////////////////////////
// 汇编指令编译函数
// mov op1, op2
//
void parse_mov(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(mov_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_ES)
&& OT_IMMEDIATE == op2_type)
{
// mov reg, immediate
// 操作码
machine_code[machine_code_address] = 0x01;
machine_code_address++;
// reg为目的寄存器操作数
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数机器码
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_ES)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_ES))
{
// mov reg, reg
// 操作码
machine_code[machine_code_address] = 0x02;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_ES) && OT_SYMBOL == op2_type)
{
// mov reg, symbol
// 操作码
machine_code[machine_code_address] = 0x03;
machine_code_address++;
// 目的操作数机器码
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_ES)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_ES_INDIRECT))
{
// mov reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x04;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL_INDIRECT && op1_type <= OT_REGISTER_ES_INDIRECT)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_ES))
{
// mov [reg], reg
// 操作码
machine_code[machine_code_address] = 0x05;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r_indirect(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL_INDIRECT && op1_type <= OT_REGISTER_ES_INDIRECT) && OT_IMMEDIATE == op2_type)
{
// mov [reg], immediate
// 操作码
machine_code[machine_code_address] = 0x06;
machine_code_address++;
// 目的操作数
machine_code[machine_code_address] = get_machine_code_from_r_indirect(op1_type);
machine_code_address++;
// 立即数机器码
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else if (OT_SYMBOL == op1_type && (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_ES))
{
// mov symbol, reg
machine_code[machine_code_address] = 0x07;
machine_code_address++;
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
machine_code[machine_code_address] = rs;
machine_code_address++;
// 重定位
add_reallocate(op1, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(mov_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////////
// 加法指令
// add op1, op2
void parse_add(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(add_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// add reg, reg
// 操作码
machine_code[machine_code_address] = 0x08;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// add reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x0a;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// add reg, symbol
// 操作码
machine_code[machine_code_address] = 0x0c;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// add reg, immediate
machine_code[machine_code_address] = 0x0e;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(add_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////
// 带进位的加法指令
// adc op1, op2
void parse_adc(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(adc_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// adc reg, reg
// 操作码
machine_code[machine_code_address] = 0x10;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// adc reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x12;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// adc reg, symbol
// 操作码
machine_code[machine_code_address] = 0x14;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// adc reg, immediate
machine_code[machine_code_address] = 0x16;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(adc_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
////////////////////////////////////////////////////////////////////////////////////////////
// 减法指令
// sub op1, op2
void parse_sub(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(sub_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// sub reg, reg
// 操作码
machine_code[machine_code_address] = 0x18;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// sub reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x1a;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// sub reg, symbol
// 操作码
machine_code[machine_code_address] = 0x1c;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// sub reg, immediate
machine_code[machine_code_address] = 0x1e;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(sub_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
// 借位减法指令
// sbb op1, op2
void parse_sbb(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(sbb_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// sbb reg, reg
// 操作码
machine_code[machine_code_address] = 0x20;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// sbb reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x22;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// sbb reg, symbol
// 操作码
machine_code[machine_code_address] = 0x24;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// sbb reg, immediate
machine_code[machine_code_address] = 0x26;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(sbb_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////////////////
// 增减1指令
// inc reg
void parse_inc(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(inc_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (op_type >= OT_REGISTER_AL && op_type <= OT_REGISTER_DI)
{
//
machine_code[machine_code_address] = 0x78;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op_type);
machine_code_address++;
}
else
{
error_msg_wrong_op(inc_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// dec reg
void parse_dec(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(dec_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (op_type >= OT_REGISTER_AL && op_type <= OT_REGISTER_DI)
{
//
machine_code[machine_code_address] = 0x79;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op_type);
machine_code_address++;
}
else
{
error_msg_wrong_op(dec_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////////////////////////////
// 按位与指令
// and op1, op2
void parse_and(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(and_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// and reg, reg
// 操作码
machine_code[machine_code_address] = 0x2a;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// and reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x2c;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// and reg, symbol
// 操作码
machine_code[machine_code_address] = 0x2e;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// and reg, immediate
machine_code[machine_code_address] = 0x30;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(and_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////////////
// 按位或指令
// or op1, op2
void parse_or(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(or_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// or reg, reg
// 操作码
machine_code[machine_code_address] = 0x32;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// or reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x34;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// or reg, symbol
// 操作码
machine_code[machine_code_address] = 0x36;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// or reg, immediate
machine_code[machine_code_address] = 0x38;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(or_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////////////
// 按位异或指令
// xor op1, op2
void parse_xor(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(xor_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// xor reg, reg
// 操作码
machine_code[machine_code_address] = 0x3a;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL_INDIRECT && op2_type <= OT_REGISTER_DI_INDIRECT))
{
// xor reg, [reg]
// 操作码
machine_code[machine_code_address] = 0x3c;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r_indirect(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// xor reg, symbol
// 操作码
machine_code[machine_code_address] = 0x3e;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// xor reg, immediate
machine_code[machine_code_address] = 0x40;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else
{
error_msg_wrong_op(xor_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
////////////////////////////////////////////////////
//
// push reg
void parse_push(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char_comma);
if (NULL == op)
{
error_msg_miss_op(push_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (op_type >= OT_REGISTER_AL && op_type <= OT_REGISTER_ES)
{
machine_code[machine_code_address] = 0x42;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op_type);
machine_code_address++;
}
else
{
error_msg_wrong_op(push_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////
//
// pop reg
void parse_pop(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char_comma);
if (NULL == op)
{
error_msg_miss_op(pop_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (op_type >= OT_REGISTER_AL && op_type <= OT_REGISTER_ES)
{
machine_code[machine_code_address] = 0x43;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op_type);
machine_code_address++;
}
else
{
error_msg_wrong_op(pop_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////////
//
// not reg
void parse_not(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(not_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
// 目标操作数只能是通用寄存器
if (op_type >= OT_REGISTER_AL && op_type <= OT_REGISTER_DI)
{
machine_code[machine_code_address] = 0x44;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op_type);
machine_code_address++;
}
else
{
error_msg_wrong_op(not_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////
//
// cmp op1, op2
void parse_cmp(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(cmp_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_IMMEDIATE == op2_type)
{
// cmp reg, immediate
machine_code[machine_code_address] = 0x47;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 立即数
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// cmp reg, reg
// 操作码
machine_code[machine_code_address] = 0x49;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(xor_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////
//
// 接口访问指令
// in op1, op2
void parse_in(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(in_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if (OT_REGISTER_AL == op1_type && OT_IMMEDIATE == op2_type)
{
// in al, imm
machine_code[machine_code_address] = 0x4b;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
machine_code[machine_code_address] = get_machine_code_from_immediate(op2);
machine_code_address++;
}
else if (OT_REGISTER_AL == op1_type && OT_REGISTER_DL == op2_type)
{
// in al, dl
machine_code[machine_code_address] = 0x4c;
machine_code_address++;
//
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
rd = get_machine_code_from_r(op1_type);
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(in_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// out op1, op2
void parse_out(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(out_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if (OT_REGISTER_DL == op1_type && OT_REGISTER_AL == op2_type)
{
// out dl, al
machine_code[machine_code_address] = 0x4d;
machine_code_address++;
//
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
rd = get_machine_code_from_r(op1_type);
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else if (OT_IMMEDIATE == op1_type && OT_REGISTER_AL == op2_type)
{
// out imm, al
machine_code[machine_code_address] = 0x4e;
machine_code_address++;
//
machine_code[machine_code_address] = get_machine_code_from_r(op2_type);
machine_code_address++;
machine_code[machine_code_address] = get_machine_code_from_immediate(op1);
machine_code_address++;
}
else
{
error_msg_wrong_op(out_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
///////////////////////////////////////////////////////
//
// lea reg, symbol
void parse_lea(int line_num)
{
char *op1, *op2;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(lea_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI) && OT_SYMBOL == op2_type)
{
// lea reg, symbol
machine_code[machine_code_address] = 0x4f;
machine_code_address++;
machine_code[machine_code_address] = get_machine_code_from_r(op1_type);
machine_code_address++;
// 重定位
add_reallocate(op2, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(lea_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////
//
// jz/je symbol
void parse_jz(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(jz_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_SYMBOL == op_type)
{
// jz symbol
machine_code[machine_code_address] = 0x54;
machine_code_address++;
// 重定位
add_reallocate(op, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(jz_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////
//
// jnz/jne symbol
void parse_jnz(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(jnz_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_SYMBOL == op_type)
{
machine_code[machine_code_address] = 0x55;
machine_code_address++;
// 重定位
add_reallocate(op, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(jnz_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////
//
// jc symbol
void parse_jc(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(jc_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_SYMBOL == op_type)
{
machine_code[machine_code_address] = 0x56;
machine_code_address++;
// 重定位
add_reallocate(op, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(jc_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////
// jmp symbol
void parse_jmp(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(jmp_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_SYMBOL == op_type)
{
// jmp symbol
machine_code[machine_code_address] = 0x57;
machine_code_address++;
// 重定位
add_reallocate(op, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(jmp_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
////////////////////////////////////////////////////////////////////////////////////
//
// int immediate
void parse_int(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(int_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_IMMEDIATE == op_type)
{
// int immediate
machine_code[machine_code_address] = 0x5a;
machine_code_address++;
//
machine_code[machine_code_address] = 0xB4;
machine_code_address++;
machine_code[machine_code_address] = get_machine_code_from_immediate(op);
machine_code_address++;
}
else
{
error_msg_wrong_op(int_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// iret
void parse_iret(int line_num)
{
machine_code[machine_code_address] = 0x5d;
machine_code_address++;
//
machine_code[machine_code_address] = 0x44;
machine_code_address++;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////
//
// 移位指令
// sal op1, op2
void parse_sal(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(sal_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x5f;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(sal_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// sar op1, op2
void parse_sar(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(sar_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x61;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(sar_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// shl op1, op2
void parse_shl(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(shl_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x63;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(shl_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// shr op1, op2
void parse_shr(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(shr_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x65;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(shr_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// rol op1, op2
void parse_rol(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(rol_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x67;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(rol_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// ror op1, op2
void parse_ror(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(ror_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x69;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(ror_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// rcl op1, op2
void parse_rcl(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(rcl_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x6b;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(rcl_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// rcr op1, op2
void parse_rcr(int line_num)
{
char *op1, *op2;
char rs, rd;
unsigned long op1_type, op2_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op1 = strtok(NULL, delimit_char_comma);
op2 = strtok(NULL, delimit_char);
if (NULL == op1 || NULL == op2)
{
error_msg_miss_op(rcr_instruction_keyword, line_num);
}
op1_type = get_operand_type(op1);
op2_type = get_operand_type(op2);
if ((op1_type >= OT_REGISTER_AL && op1_type <= OT_REGISTER_DI)
&& (op2_type >= OT_REGISTER_AL && op2_type <= OT_REGISTER_DI))
{
// 操作码
machine_code[machine_code_address] = 0x6d;
machine_code_address++;
// 源操作数寄存器rs
rs = get_machine_code_from_r(op2_type);
rs = rs << 4;
// 目的操作数
rd = get_machine_code_from_r(op1_type);
// 操作数机器码
machine_code[machine_code_address] = rs | rd;
machine_code_address++;
}
else
{
error_msg_wrong_op(rcr_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////////
//
// nop
void parse_nop(int line_num)
{
machine_code[machine_code_address] = 0x6f;
machine_code_address++;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
//////////////////////////////////////////////////////////////////////////
//
// call symbol
void parse_call(int line_num)
{
char *op;
unsigned long op_type;
if (assembler_state != AS_TEXT)
{
warning_msg_invalid_line(line_num);
return;
}
op = strtok(NULL, delimit_char);
if (NULL == op)
{
error_msg_miss_op(call_instruction_keyword, line_num);
}
op_type = get_operand_type(op);
if (OT_SYMBOL == op_type)
{
// call symbol
machine_code[machine_code_address] = 0x71;
machine_code_address++;
// 重定位
add_reallocate(op, line_num);
machine_code_address++;
}
else
{
error_msg_wrong_op(call_instruction_keyword, line_num);
}
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////
//
// ret
void parse_ret(int line_num)
{
machine_code[machine_code_address] = 0x73;
machine_code_address++;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////
//
// cli
void parse_cli(int line_num)
{
machine_code[machine_code_address] = 0x74;
machine_code_address++;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
/////////////////////////////////////////////////////////////////////////////
//
// sti
void parse_sti(int line_num)
{
machine_code[machine_code_address] = 0x75;
machine_code_address++;
//
// 在代码行数据库中，标记此行是一个指令行
//
line_database[line_count].flag |= LF_INSTRUCTION;
}
// 向符号表中添加一个符号
void add_symbol(const char* symbol, int line_num)
{
int i;
// 符号名称不能重复
for (i = 0; i < symbol_count; i++)
{
if (stricmp(symbol, symbol_table[i].name) == 0)
{
error_msg_same_symbol(symbol, line_num, symbol_table[i].line_num);
}
}
// 符号数量有限
if (symbol_count == MAX_SYMBOL_COUNT)
{
sprintf(formated_msg, "定义了太多的符号。最多可以定义 %d 个符号。", MAX_SYMBOL_COUNT);
error_msg(formated_msg, line_num);
}
// 添加符号
strcpy(symbol_table[symbol_count].name, symbol);
symbol_table[symbol_count].address = machine_code_address;
symbol_table[symbol_count].line_num = line_num;
symbol_count++;
}
// 解析符号
void parse_symbol(const char* symbol_with_colon, int line_num)
{
char symbol[MAX_SYMBOL_LENGTH];
char* token;
// 删除符号末尾的冒号
strcpy(symbol, symbol_with_colon);
symbol[strlen(symbol) - 1] = 0;
if (AS_TEXT == assembler_state)
{
// 代码段中的标号作为符号。记录到符号表中，不产生机器码。
add_symbol(symbol, line_num);
// 标号必须单独占一行，否则报错
if (strtok(NULL, delimit_char) != NULL)
{
error_msg("标号必须单独占用一行。", line_num);
}
}
else if (AS_DATA == assembler_state)
{
// 数据段中的变量作为符号。一个变量可以包含多个字节数据。记录到符号表中，产生机器码。
add_symbol(symbol, line_num);
while ((token = strtok(NULL, delimit_char)) != NULL)
{
if (!is_immediate(token))
{
error_msg_wrong_data(token, line_num);
}
machine_code[machine_code_address] = get_machine_code_from_immediate(token);
machine_code_address++;
symbol_table[symbol_count - 1].machine_code_count++;
}
}
else
{
warning_msg_invalid_line(line_num);
}
}
// 解析中断向量
void parse_int_vector(const char* symbol_with_colon, int line_num)
{
char symbol[MAX_SYMBOL_LENGTH];
char* token;
if (AS_INT_TABLE == assembler_state)
{
// 重定位
add_reallocate(symbol_with_colon, line_num);
machine_code_address++;
// 中断向量必须单独占一行，否则报错
if (strtok(NULL, delimit_char) != NULL)
{
error_msg("中断向量必须单独占用一行。", line_num);
}
}
}
// 解析中断向量表开始标志
void parse_int_table_section_keyword(int line_num)
{
// 中断向量表标志
if (AS_TEXT == assembler_state)
{
error_msg("中断向量表不能定义在代码段的后面。", line_num);
}
else if (AS_INT_TABLE == assembler_state)
{
error_msg("定义了重复的中断向量列表。", line_num);
}
assembler_state = AS_INT_TABLE;
}
// 解析代码段开始标志
void parse_code_section_keyword(int line_num)
{
// 代码段标志
if (AS_DATA == assembler_state)
{
error_msg("代码段不能定义在数据段的后面。", line_num);
}
else if (AS_TEXT == assembler_state)
{
error_msg("定义了重复的代码段。", line_num);
}
//若当前地址小于0x10，则补充空行
for (; machine_code_address < 0x10;)
{
line_database[line_count].line_num = line_num;
line_database[line_count].address = machine_code_address;
machine_code_address++;
machine_code_old_address++;
}
// 代码段的起始地址为0x10
assembler_state = AS_TEXT;
}
// 解析数据段开始标志
void parse_data_section_keyword(int line_num)
{
// 数据段标志
if (AS_DATA == assembler_state)
{
error_msg("定义了重复的数据段。", line_num);
}
else if (AS_BEGIN == assembler_state)
{
error_msg("数据段不能定义在代码段的前面。", line_num);
}
assembler_state = AS_DATA;
}
// 定义关键字和解析函数的对应关系
typedef void(*PARSE_FUNCTION)(int line_num);
struct KEYWORD_FUNCTION_ENTRY
{
const char** keyword;
PARSE_FUNCTION parse_function;
};
//
// 必须将关键字及其解析函数放在下面的表中。从而可以使用“表驱动”的编程模式。
//
struct KEYWORD_FUNCTION_ENTRY keyword_function_table[] =
{
{ NULL, NULL } // 未用
,{ &int_table_section_keyword, parse_int_table_section_keyword }
,{ &code_section_keyword, parse_code_section_keyword }
,{ &data_section_keyword, parse_data_section_keyword }
,{ &mov_instruction_keyword, parse_mov }
,{ &jmp_instruction_keyword, parse_jmp }
,{ &add_instruction_keyword, parse_add }
,{ &adc_instruction_keyword, parse_adc }
,{ &sub_instruction_keyword, parse_sub }
,{ &sbb_instruction_keyword, parse_sbb }
,{ &and_instruction_keyword, parse_and }
,{ &or_instruction_keyword, parse_or }
,{ &jc_instruction_keyword, parse_jc }
,{ &jz_instruction_keyword, parse_jz }
,{ &je_instruction_keyword, parse_jz }
,{ &jnz_instruction_keyword, parse_jnz }
,{ &jne_instruction_keyword, parse_jnz }
,{ &call_instruction_keyword, parse_call }
,{ &push_instruction_keyword, parse_push }
,{ &pop_instruction_keyword, parse_pop }
,{ &in_instruction_keyword, parse_in }
,{ &out_instruction_keyword, parse_out }
,{ &ret_instruction_keyword, parse_ret }
,{ &shr_instruction_keyword, parse_shr }
,{ &shl_instruction_keyword, parse_shl }
,{ &rcr_instruction_keyword, parse_rcr }
,{ &rcl_instruction_keyword, parse_rcl }
,{ &sal_instruction_keyword, parse_sal }
,{ &sar_instruction_keyword, parse_sar }
,{ &rol_instruction_keyword, parse_rol }
,{ &ror_instruction_keyword, parse_ror }
,{ &not_instruction_keyword, parse_not }
,{ &iret_instruction_keyword, parse_iret }
,{ &nop_instruction_keyword, parse_nop }
,{ &int_instruction_keyword, parse_int }
,{ &lea_instruction_keyword, parse_lea }
,{ &inc_instruction_keyword, parse_inc }
,{ &dec_instruction_keyword, parse_dec }
,{ &cmp_instruction_keyword, parse_cmp }
,{ &cli_instruction_keyword, parse_cli }
,{ &sti_instruction_keyword, parse_sti }
,{ &al_register_keyword, NULL }
,{ &bl_register_keyword, NULL }
,{ &cl_register_keyword, NULL }
,{ &dl_register_keyword, NULL }
,{ &sp_register_keyword, NULL }
,{ &bp_register_keyword, NULL }
,{ &si_register_keyword, NULL }
,{ &di_register_keyword, NULL }
,{ &cs_register_keyword, NULL }
,{ &ds_register_keyword, NULL }
,{ &ss_register_keyword, NULL }
,{ &es_register_keyword, NULL }
,{ &al_register_indirect_keyword, NULL }
,{ &bl_register_indirect_keyword, NULL }
,{ &cl_register_indirect_keyword, NULL }
,{ &dl_register_indirect_keyword, NULL }
,{ &sp_register_indirect_keyword, NULL }
,{ &bp_register_indirect_keyword, NULL }
,{ &si_register_indirect_keyword, NULL }
,{ &di_register_indirect_keyword, NULL }
,{ &cs_register_indirect_keyword, NULL }
,{ &ds_register_indirect_keyword, NULL }
,{ &ss_register_indirect_keyword, NULL }
,{ &es_register_indirect_keyword, NULL }
};
// 判断是否是一个关键字。返回0，不是关键字；返回非0，是关键字，并且返回值就是关键字在表中的下标。
int match_keyword(const char* token)
{
int i;
for (i = 1; i < sizeof(keyword_function_table) / sizeof(keyword_function_table[0]); i++)
{
if (stricmp(token, *keyword_function_table[i].keyword) == 0)
{
return i;
}
}
return 0;
}
// 判断是否是一个符号
int is_symbol(const char* token, int line_num)
{
int i;
char symbol_name[MAX_SYMBOL_LENGTH];
// 最后一个字符必须是冒号
if (token[strlen(token) - 1] != ':')
{
return 0;
}
// 第一个字符必须是字母或者下划线
if (token[0] != '_' && !isalpha(token[0]))
{
return 0;
}
// 后面的字符必须是字母、数字、下划线
for (i = 0; i < (int)strlen(token) - 2; i++)
{
if (token[i] != '_' && !isalpha(token[i]) && !isdigit(token[i]))
{
return 0;
}
}
// 不能与关键字相同
strcpy(symbol_name, token);
symbol_name[strlen(symbol_name) - 1] = 0;
if (match_keyword(symbol_name) != 0)
{
error_msg_keyword_symbol(symbol_name, line_num);
}
return 1;
}
// 判断是否是一个中断向量
int is_int_vector(const char* token, int line_num)
{
int i;
char vector_name[MAX_SYMBOL_LENGTH];
// 第一个字符必须是字母或者下划线
if (token[0] != '_' && !isalpha(token[0]))
{
return 0;
}
// 后面的字符必须是字母、数字、下划线
for (i = 0; i < (int)strlen(token) - 2; i++)
{
if (token[i] != '_' && !isalpha(token[i]) && !isdigit(token[i]))
{
return 0;
}
}
// 不能与关键字相同
strcpy(vector_name, token);
if (match_keyword(vector_name) != 0)
{
error_msg_keyword_int_vector(vector_name, line_num);
}
return 1;
}
// 输出版本信息
void version_msg()
{
printf(
"Engintime 8086汇编器 [版本 2.0]\n"
);
}
// 输出帮助信息
void help_msg()
{
printf(
"Engintime 8086汇编器。\n\n"
"用法:\n\n"
" dmasm.exe assembly_file_name [options]\n\n"
"选项:\n\n"
" -g debug_file_name\t指定生成的调试信息文件路径。\n"
" -h\t\t\t打印此帮助信息。\n"
" -l list_file_name\t指定生成的列表文件路径。\n"
" -o target_file_name\t指定生成的目标文件路径。若未指定，默认生成 a.obj 文件。\n"
" -v\t\t\t打印版本信息。\n"
);
printf("\n");
version_msg();
exit(1);
}
void argument_error_msg()
{
printf("命令行参数错误。\n\n");
help_msg();
}
// 处理器用户输入的命令行参数
void process_argument(int argc, char* argv[])
{
int i;
// argv[0] 是 "easm.exe"，所以可以忽略。
for (i = 1; i < argc; i++)
{
if (strcmp(argv[i], "-v") == 0)
{
version_msg();
exit(1);
}
else if (strcmp(argv[i], "-h") == 0)
{
help_msg();
}
else if (strcmp(argv[i], "-o") == 0)
{
if (i + 1 < argc)
{
i++;
target_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (strcmp(argv[i], "-l") == 0)
{
if (i + 1 < argc)
{
i++;
list_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (strcmp(argv[i], "-g") == 0)
{
if (i + 1 < argc)
{
i++;
dbg_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
else if (NULL == assembly_file_name && argv[i][0] != '-')
{
// 输入的汇编源代码文件路径。
assembly_file_name = argv[i];
}
else
{
argument_error_msg();
}
}
//
// 如果命令行参数中没有指定输入的汇编文件，就打印错误信息后退出
//
if (NULL == assembly_file_name)
{
printf("命令行参数错误。没有指定汇编源代码文件的路径。\n");
help_msg();
}
}
// 将一个字符串写入二进制文件中。先将字符串长度写入文件，然后将字符串中的
// 每个字符依次写入文件，不包括字符串末尾的 0.
void write_string_to_binary_file(const char* str, FILE* fp)
{
int str_length;
if (str != NULL)
{
str_length = strlen(str);
fwrite(&str_length, 1, sizeof(str_length), fp);
fwrite(str, 1, str_length, fp);
}
else
{
str_length = 0;
fwrite(&str_length, 1, sizeof(str_length), fp);
}
}
int main(int argc, char* argv[])
{
FILE* fp;
char* token;
char line[MAX_LINE_LENGTH];
int i, j;
int line_num = 1; // 行号从第一行开始计数
int keyword_index;
//
// 处理命令行参数
//
process_argument(argc, argv);
//
// 打开汇编源代码文件
//
fp = fopen(assembly_file_name, "r");
if (NULL == fp)
{
printf("无法打开源代码文件 %s\n", assembly_file_name);
return 1;
}
//////////////////////////////////////////////////////////////////////////
// 第一遍扫描
version_msg();
printf("\n正在汇编 %s...\n", assembly_file_name);
//
// 一次读取一行文本，同时记录所有的代码行信息
//
while (fgets(line, sizeof(line), fp) != NULL)
{
//
// 将一行代码的信息记录到代码行数据库中
//
strcpy(line_database[line_count].line_string, line);
line_database[line_count].line_num = line_num;
line_database[line_count].address = machine_code_address;
//
// 将代码行中的注释剥离
//
line[strcspn(line, ";")] = 0;
//
// 开始解析代码行
//
token = strtok(line, delimit_char);
if (NULL == token)
{
// 如果是空行，不做任何处理
}
else if ((keyword_index = match_keyword(token)) != 0
&& keyword_function_table[keyword_index].parse_function != NULL)
{
// 根据关键字进行相应的处理
keyword_function_table[keyword_index].parse_function(line_num);
}
else if (is_int_vector(token, line_num))
{
// 必须首先判断是否是中断向量，然后再判断是否是标号。因为判断标号的时候会删除最后一个标志字符“：”，而中断向量名称后是没有冒号的
// 中断向量
parse_int_vector(token, line_num);
// 判断符号
if (is_symbol(token, line_num))
{
// 处理符号
parse_symbol(token, line_num);
}
}
else
{
error_msg("无法识别的代码行。", line_num);
}
//
// 补充代码行数据库信息
//
line_database[line_count].machine_code_count = machine_code_address - machine_code_old_address;
machine_code_old_address = machine_code_address;
//
// 检查机器码地址是否超过了最大地址，若超过则报错(一个地址单元存储一个字节机器码)
//
//
if (MAX_MACHINE_CODE_BYTE_COUNT == machine_code_address)
{
sprintf(formated_msg, "汇编代码的机器码过多，最多只能有 %d 个字节机器码。", MAX_MACHINE_CODE_BYTE_COUNT);
error_msg(formated_msg, -1);
}
//
// 记录产生了机器码的代码行数量
//
if (line_database[line_count].machine_code_count != 0)
{
machine_code_line_count++;
}
//
// 增加行号
//
line_count++;
line_num++;
if (line_count == MAX_LINE_COUNT)
{
sprintf(formated_msg, "汇编文件中的代码行过多，最多只能有 %d 行代码。", MAX_LINE_COUNT);
error_msg(formated_msg, -1);
}
}
fclose(fp);
//////////////////////////////////////////////////////////////////////////
// 第二遍扫描
//
// 根据符号表更新重定位表
//
for (i = 0; i < reallocate_count; i++)
{
for (j = 0; j < symbol_count; j++)
{
if (stricmp(symbol_table[j].name, reallocate_table[i].symbol_name) == 0)
{
machine_code[reallocate_table[i].address] = (BYTE)symbol_table[j].address;
symbol_table[j].ref_count++;
break;
}
}
if (j == symbol_count)
{
// 重定位表中使用的符号在符号表中未定义，报错
sprintf(formated_msg, "使用了未定义的符号 %s。", reallocate_table[i].symbol_name);
error_msg(formated_msg, reallocate_table[i].line_num);
}
}
//
// 如果存在未引用的符号，输出警告信息。
//
for (i = 0; i < symbol_count; i++)
{
if (0 == symbol_table[i].ref_count)
{
warning_msg_unref_symbol(symbol_table[i].name, symbol_table[i].line_num);
}
}
//////////////////////////////////////////////////////////////////////////
// 产生各种输出文件
//
// 将机器码写入二进制文件
//
if (NULL == target_file_name)
{
target_file_name = "a.obj";
}
fp = fopen(target_file_name, "wb");
if (NULL == fp)
{
printf("无法打开输出文件 %s\n", target_file_name);
return 1;
}
fwrite(machine_code, 1, machine_code_address, fp);
fclose(fp);
printf("\n生成目标文件 %s\n", target_file_name);
//
// 将代码行数据库中的信息写入列表文件
//
if (list_file_name != NULL)
{
fp = fopen(list_file_name, "w");
if (NULL == fp)
{
printf("无法打开列表文件 %s\n", list_file_name);
return 1;
}
for (i = 0; i < line_count; i++)
{
// 行号
fprintf(fp, "%04d ", line_database[i].line_num);
// 地址和机器码
if (line_database[i].machine_code_count > 0)
{
fprintf(fp, "%02X ", line_database[i].address);
for (j = 0; j < line_database[i].machine_code_count; j++)
{
// 确保每行最多写三个字节的机器码
if (j != 0 && j % 3 == 0)
{
if (3 == j)
{
fprintf(fp, " ");
}
else
{
fprintf(fp, "\n ");
}
}
fprintf(fp, "%02X ", machine_code[line_database[i].address + j]);
if (2 == j)
{
fprintf(fp, " ");
fprintf(fp, line_database[i].line_string);
}
}
if (1 == j)
{
// 单字节指令
fprintf(fp, " ");
fprintf(fp, line_database[i].line_string);
}
else if (2 == j)
{
fprintf(fp, " ");
fprintf(fp, line_database[i].line_string);
}
else if (j > 3)
{
fprintf(fp, "\n");
}
}
else
{
fprintf(fp, " ");
// 源代码
fprintf(fp, line_database[i].line_string);
}
}
fclose(fp);
printf("生成列表文件 %s\n", list_file_name);
}
//
// 将代码行数据库中的信息写入二进制的调试信息文件。
//
// 调试信息的基本格式为：
// 魔数（4字节），固定不可改变
// 版本号（4字节），固定不可改变
// 源代码文件绝对路径字符串长度（4字节）
// 源代码文件绝对路径字符串（不包括字符串结尾的0）
// 列表文件绝对路径字符串长度（4字节）
// 列表文件绝对路径字符串（不包括字符串结尾的0）
//
// 代码行数据库中元素的数量（4字节）
// 代码行数据库中的所有元素
//
// 符号表元素的数量（4字节）
// 符号表中的所有元素
//
if (dbg_file_name != NULL)
{
fp = fopen(dbg_file_name, "wb");
if (NULL == fp)
{
printf("无法打开调试信息文件 %s\n", dbg_file_name);
return 1;
}
// 魔数
fwrite(&dbg_file_magic, 1, sizeof(dbg_file_magic), fp);
// 版本号
fwrite(&dbg_file_version, 1, sizeof(dbg_file_version), fp);
// 源代码文件路径
write_string_to_binary_file(assembly_file_name, fp);
// 列表文件路径
write_string_to_binary_file(list_file_name, fp);
// 代码行数据库中的所有元素
fwrite(&machine_code_line_count, 1, sizeof(machine_code_line_count), fp);
for (i = 0; i < line_count; i++)
{
// 跳过没有产生机器码的代码行
if (0 == line_database[i].machine_code_count)
{
continue;
}
fwrite(&line_database[i].line_num, 1, sizeof(unsigned long), fp);
fwrite(&line_database[i].address, 1, sizeof(unsigned long), fp);
fwrite(&line_database[i].machine_code_count, 1, sizeof(unsigned long), fp);
fwrite(&line_database[i].flag, 1, sizeof(unsigned long), fp);
}
// 符号表中的所有元素
fwrite(&symbol_count, 1, sizeof(symbol_count), fp);
for (i = 0; i < symbol_count; i++)
{
write_string_to_binary_file(symbol_table[i].name, fp);
fwrite(&symbol_table[i].address, 1, sizeof(unsigned long), fp);
fwrite(&symbol_table[i].machine_code_count, 1, sizeof(int), fp);
fwrite(&symbol_table[i].line_num, 1, sizeof(int), fp);
}
fclose(fp);
printf("生成调试信息文件 %s\n", dbg_file_name);
}
return 0;
}
MEM/dmasm.exe 0 → 100644
浏览文件 @ da310816
添加文件
MEM/ram.asm 0 → 100644
浏览文件 @ da310816
; 0~15号存储单元存放中断向量，即中断向量表
.int_table
; 代码段 .text 总是从位置 0x10 开始
.text
mov al, 16
add al, num
; 死循环
end:
jmp end
; 数据段
.data
num: -1
MEM/ram.bat 0 → 100644
浏览文件 @ da310816
@echo off
dmasm.exe ram.asm -o ram.rxm -l ram.lst -g ram.dbg
pause
MEM/ram.dbg 0 → 100644
浏览文件 @ da310816
添加文件
MEM/ram.lst 0 → 100644
浏览文件 @ da310816
0001 ; 0~15号存储单元存放中断向量，即中断向量表
0002 .int_table
0003
0004 ; 代码段 .text 总是从位置 0x10 开始
0005 .text
0006 10 01 00 10 mov al, 16
0007 13 0C 00 18 add al, num
0008
0009 ; 死循环
0010 end:
0011 16 57 16 jmp end
0012
0013 ; 数据段
0014 .data
0015 18 FF num: -1
0016
0017
0018
MEM/ram.rxm 0 → 100644
浏览文件 @ da310816
添加文件
README.md 0 → 100644
浏览文件 @ da310816
# 说明
8086 微机系统，是一个由 `8086 微处理器`，`MEM 主存储器`，`IO 地址译码单元`组成的，可以执行 8086 指令的最小微机系统。在此基础上，可以继续添加其它接口芯片（包括 8259A、8253、AD、DA等），然后在 MEM/ram.asm 文件中使用 8086 汇编语言编写驱动程序，即可设计出具有更多功能、更加复杂的微机系统。
# 原理图
![raw svg](top.dlsche.svg)
\ No newline at end of file
top.dlsche 0 → 100644
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top.dlsche.svg 0 → 100644
浏览文件 @ da310816
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<svg height="4778" version="1.1" width="8150" xmlns="http://www.w3.org/2000/svg">
<text alignment-baseline="after-edge" fill="#800000" font-family="微软雅黑" font-size="200" font-weight="700" text-anchor="start" x="27" y="4001">DBUS[7..0]</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="微软雅黑" font-size="200" font-weight="700" text-anchor="start" x="57" y="1231">ABUS[7..0]</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="微软雅黑" font-size="65" font-weight="700" text-anchor="start" x="1777" y="2701">CLK</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1167" x2="1267" y1="2701" y2="2701"/>
<rect fill="#ffffb0" height="100" stroke="#800000" stroke-width="5" width="100" x="1067" y="2651"/>
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<text alignment-baseline="after-edge" fill="#000080" font-family="微软雅黑" font-size="65" font-weight="700" text-anchor="start" x="977" y="2821">Key = C</text>
<text alignment-baseline="after-edge" fill="#800000" font-family="微软雅黑" font-size="90" font-weight="700" text-anchor="start" x="1447" y="1921">RESET</text>
<line stroke="#000000" stroke-linecap="round" stroke-width="5" x1="1347" x2="1447" y1="1921" y2="1921"/>
<rect fill="#ffffb0" height="100" stroke="#800000" stroke-width="5" width="100" x="1247" y="1871"/>
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<text alignment-baseline="after-edge" fill="#000080" font-family="微软雅黑" font-size="180" font-weight="700" text-anchor="start" x="997" y="2221">Key = R</text>
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<rect fill="#80ff80" height="1700" stroke="#800000" stroke-width="1" width="700" x="3217" y="1701"/>
<text alignment-baseline="after-edge" fill="#000000" font-family="微软雅黑" font-size="250" font-weight="700" text-anchor="start" x="3217" y="1601">8086</text>
<text alignment-baseline="after-edge" fill="#000080" font-family="Times New Roman" font-size="25" font-weight="400" text-anchor="start" x="3217" y="1651">8086\8086.dlsche</text>
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