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Refactored assembler and working on memory addressing...

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This commit is contained in:
xolatile
2024-07-11 08:25:54 -04:00
parent e5aa18ffaa
commit 6e88b65b8c
3 changed files with 116 additions and 82 deletions
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144
source/assembler.c
View File

@ -2,23 +2,6 @@
#include <stdlib.h>
/*
gcc -c -ansi -Wall -Wextra -Wpedantic -Werror:
-- warns about trailing comma in enumerations.
-- kept because of chad coding standard.
-- unused functions for now, obviously...
clang -c -ansi -Weverything -Werror:
-- exactly same warnings as with gcc above.
splint -fcnuse +boolint +charint assembler.c:
-- we obviously ignore unused functions for now.
-- we assume bool is int, which is true.
-- we assume char is int, which is true.
-- assembler.c:167:13: Function fabs shadows outer declaration
-- ^ function from <math.h>, which we don't even use.
splint assembler.h:
-- no warnings at all.
*/
#define REGULAR_BEGIN (ADD)
#define REGULAR_END (CMP)
#define IRREGULAR_BEGIN (INC)
@ -40,10 +23,10 @@ splint assembler.h:
#define MOVE_IF_COUNT (MOVE_IF_END - MOVE_IF_BEGIN + 1)
// Regulates displacement, immediate, label, variable, constant, string data.
static next * empty_from;
/*static next * empty_from;
static next * empty_to;
static next * imbue_with;
static next * imbue_size;
static next * imbue_size;*/
// Main function.
static void place (form when,
@ -58,23 +41,22 @@ static void print (form when,
size_index size,
next data) {
/* */
place ((when != 0) && (size >= D8), (byte) ((data >> 0) & 0XFF));
place ((when != 0) && (size >= D16), (byte) ((data >> 8) & 0XFF));
place ((when != 0) && (size >= D32), (byte) ((data >> 16) & 0XFF));
place ((when != 0) && (size >= D32), (byte) ((data >> 24) & 0XFF));
place ((when != 0) && (size >= D8), (byte) ((data >> 0) & 0xff));
place ((when != 0) && (size >= D16), (byte) ((data >> 8) & 0xff));
place ((when != 0) && (size >= D32), (byte) ((data >> 16) & 0xff));
place ((when != 0) && (size >= D32), (byte) ((data >> 24) & 0xff));
}
static form front (form data) { return ((data >= 4) && (data <= 7)); }
static form valid (form data) { return ((data >= 0) && (data <= 15)); }
static form lower (form data) { return ((data >= 0) && (data <= 7)); }
static form upper (form data) { return ((data >= 8) && (data <= 15)); }
// Important stuff that I need to handle later, it saves bytes!
static form far (next label) { return (1); /* DO NOT CHANGE YET! */ }
static form near (next label) { return (0); /* DO NOT CHANGE YET! */ }
static form far (next label) { return (label && 1); }
static form near (next label) { return (label && 0); }
static void build_short_prefix (form when) {
place (when, 0X66);
place (when, 0x66);
}
// 40-4D!0X02
@ -83,10 +65,10 @@ static void build_long_prefix (form use_big_registers,
form use_new_source) {
/* */
place (use_big_registers || use_new_destination || use_new_source,
(byte) (0X40
+ 0X01 * use_new_destination
+ 0X04 * use_new_source
+ 0X08 * use_big_registers));
(byte) (0x40
+ 0x01 * use_new_destination
+ 0x04 * use_new_source
+ 0x08 * use_big_registers));
}
// C0-FF
@ -94,25 +76,25 @@ static void build_register_direction (form when,
next destination,
next source) {
/* */
place (when, (byte) (0XC0
+ 0X01 * (destination & 0X07)
+ 0X08 * (source & 0X07)));
place (when, (byte) (0xc0
+ 0x01 * (destination & 0x07)
+ 0x08 * (source & 0x07)));
}
// 05-3D
static void build_register_redirection (form when,
next direction) {
/* */
place (when, (byte) (0X05
+ 0X08 * (direction & 0X07)));
place (when, (byte) (0x05
+ 0x08 * (direction & 0x07)));
}
// 80/81
static void build_constant (form when,
size_index size) {
/* */
place (when, (byte) (0X80
+ 0X01 * (size != D8)));
place (when, (byte) (0x80
+ 0x01 * (size != D8)));
}
// REGULAR_BEGIN-REGULAR_END D8-D64 REG/MEM R0-R15/MEM -||-/IMM -||-/IMM
@ -134,24 +116,24 @@ static void build_regular (operation_index operation,
&& (((front (destination) && lower (source))
|| (lower (destination) && front (source))) ||
((to == REG) && (from == IMM) && front (destination))),
(byte) 0X40);
(byte) 0x40);
place ((from == IMM) && (to == REG) && (destination == 0),
(byte) (0X05
+ 0X08 * (operation & 0X07))
- 0X01 * (size == D8));
(byte) (0x05
+ 0x08 * (operation & 0x07))
- 0x01 * (size == D8));
build_constant ((from == IMM) && ! ((to == REG) && (destination == 0)), size);
place (! ((from == IMM) && (to == REG) && (destination == 0)),
(byte) (0X08 * (operation - REGULAR_BEGIN)
+ (destination & 0X07) * ((to == REG) && (from == IMM))
+ 0X01 * ((to == MEM) && (from == IMM) && (size == D8)) //
- 0X01 * ((to == REG) && (from == IMM) && (size != D8)) //
+ 0X01 * (size != D8)
+ 0X02 * ((to == REG) && (from == MEM))
+ 0X04 * ((to == MEM) && (from == IMM))
+ 0XC0 * ((to == REG) && (from == IMM))));
(byte) (0x08 * (operation - REGULAR_BEGIN)
+ (destination & 0x07) * ((to == REG) && (from == IMM))
+ 0x01 * ((to == MEM) && (from == IMM) && (size == D8)) //
- 0x01 * ((to == REG) && (from == IMM) && (size != D8)) //
+ 0x01 * (size != D8)
+ 0x02 * ((to == REG) && (from == MEM))
+ 0x04 * ((to == MEM) && (from == IMM))
+ 0xc0 * ((to == REG) && (from == IMM))));
build_register_direction ((to == REG) && (from == REG),
destination, source);
@ -178,24 +160,24 @@ static void build_irregular (operation_index operation,
(to == REG) && (upper ((form) destination)), 0);
// 40>front
place ((size == D8) && (to == REG) && front (destination), (byte) 0X40);
place ((size == D8) && (to == REG) && front (destination), (byte) 0x40);
place (1, (byte) (0XF7
+ 0X08 * ((operation == INC) || (operation == DEC))
- 0X01 * (size == D8)));
place (1, (byte) (0xf7
+ 0x08 * ((operation == INC) || (operation == DEC))
- 0x01 * (size == D8)));
place (to == REG, (byte) (0XC0
+ 0X08 * (operation - IRREGULAR_BEGIN))
+ 0X01 * (destination & 0X07));
place (to == REG, (byte) (0xc0
+ 0x08 * (operation - IRREGULAR_BEGIN))
+ 0x01 * (destination & 0x07));
place (to == MEM, (byte) (0X05
+ 0X08 * (operation - IRREGULAR_BEGIN)));
place (to == MEM, (byte) (0x05
+ 0x08 * (operation - IRREGULAR_BEGIN)));
}
// SPECIAL_1_BEGIN-SPECIAL_1_END
static void build_special_1 (operation_index operation) {
const byte data [1 * SPECIAL_1_COUNT] = {
0X90, 0XC3, 0XCB, 0XC9, 0XF0, 0XF4
0x90, 0xc3, 0xcb, 0xc9, 0xf0, 0xf4
};
place (1, data [operation - SPECIAL_1_BEGIN]);
@ -204,8 +186,8 @@ static void build_special_1 (operation_index operation) {
// SPECIAL_2_BEGIN-SPECIAL_2_END
static void build_special_2 (operation_index operation) {
const byte data [2 * SPECIAL_2_COUNT] = {
0X0F, 0X0F, 0X0F, 0X0F, 0XF3, 0X0F,
0X34, 0X35, 0X05, 0X07, 0X90, 0XA2
0x0f, 0x0f, 0x0f, 0x0f, 0xf3, 0x0f,
0x34, 0x35, 0x05, 0x07, 0x90, 0xa2
};
place (1, data [operation - SPECIAL_2_BEGIN]);
@ -219,9 +201,9 @@ static void build_jump_if (operation_index operation,
/* */
(void) size; /* HIGHLY DEPENDS FOR FAR AND NEAR JUMPS! */
place (far (location), 0X0F); /* EVERYTHING IS FAR JUMP! */
place (far (location), (byte) (0X80 + operation - JUMP_IF_BEGIN));
place (near (location), (byte) (0X70 + operation - JUMP_IF_BEGIN));
place (far (location), 0x0f); /* EVERYTHING IS FAR JUMP! */
place (far (location), (byte) (0x80 + operation - JUMP_IF_BEGIN));
place (near (location), (byte) (0x70 + operation - JUMP_IF_BEGIN));
//~displacement (4, 0X12345678);
}
@ -240,8 +222,8 @@ static void build_move_if (operation_index operation,
(to == REG) && (upper ((form) destination)),
(from == REG) && (upper ((form) source)));
place (1, 0X0F);
place (1, (byte) (0X40 + operation - MOVE_IF_BEGIN));
place (1, 0x0f);
place (1, (byte) (0x40 + operation - MOVE_IF_BEGIN));
build_register_direction ((to == REG) && (from == REG),
destination, source);
@ -258,13 +240,13 @@ static void build_jump (size_index size,
/* */
place ((to == REG) && upper ((form) destination), (byte) 0X41);
place (to == REL, (byte) (0XE9 + 0X02 * (size == D8)));
place (to == REG, (byte) 0XFF);
place (to == REG, (byte) (0XE0 + 0X01 * (destination & 0X07)));
place (to == MEM, (byte) 0XFF);
place (to == MEM, (byte) 0X25);
place (to == REL, (byte) (0xe9 + 0x02 * (size == D8)));
place (to == REG, (byte) 0xff);
place (to == REG, (byte) (0xe0 + 0x01 * (destination & 0x07)));
place (to == MEM, (byte) 0xff);
place (to == MEM, (byte) 0x25);
//~displacement (to == MEM, 4, 0X12345678); // Keep when in mind!
//~displacement (to == MEM, 4, 0x12345678); // Keep when in mind!
}
// VERY FUCKING SPECIAL!
@ -280,19 +262,19 @@ static void build_move (size_index size,
(to == REG) && (upper ((form) destination)),
(from == REG) && (upper ((form) source)));
place ((to == REG) && (from == REG), (byte) (0X88 + (size != D8)));
place ((to == REG) && (from == MEM), (byte) (0X8A + (size != D8)));
place ((to == MEM) && (from == REG), (byte) (0X88 + (size != D8)));
place ((to == REG) && (from == REG), (byte) (0x88 + (size != D8)));
place ((to == REG) && (from == MEM), (byte) (0x8a + (size != D8)));
place ((to == MEM) && (from == REG), (byte) (0x88 + (size != D8)));
build_register_redirection ((to == REG) && (from == MEM), destination);
build_register_redirection ((to == MEM) && (from == REG), source);
place ((to == REG) && (from == IMM), (byte) (0XB0
+ 0X08 * (size != D8)
+ 0X01 * (destination & 0X07)));
place ((to == REG) && (from == IMM), (byte) (0xb0
+ 0x08 * (size != D8)
+ 0x01 * (destination & 0x07)));
place ((to == MEM) && (from == IMM), (byte) (0XC6 + (size != D8)));
place ((to == MEM) && (from == IMM), (byte) (0X05));
place ((to == MEM) && (from == IMM), (byte) (0xc6 + (size != D8)));
place ((to == MEM) && (from == IMM), (byte) (0x05));
print ((to == REG) && (from == MEM), D32, (next) ~0);
print ((to == REG) && (from == IMM), size, source);

3
source/assembler.h
View File

@ -16,6 +16,8 @@ typedef enum {
} type_index;
typedef enum {
XDCL, XLBL, XRPT, XLCT,
/* HIGHLY EXPERIMENTAL CODE ABOVE... */
ADD, OR, ADC, SBB,
AND, SUB, XOR, CMP,
/* */
@ -53,7 +55,6 @@ typedef enum {
FNOP, FXAM, FABS, FSCALE,
FSIN, FCOS, FSQRT, FCHS,
FXCH, FREM, FLDPI, FLDZ,
DECLARE,
} operation_index;
typedef enum {

51
tool/heyo_object.asm
View File

@ -6,15 +6,66 @@ section '.text' executable
_start:
fff:
nop
mov eax, 1
nop
mov edi, 1
nop
mov esi, heyo
nop
mov edx, 12
nop
syscall
nop
nop
nop
mov rax, 1122334455667788h
nop
mov rcx, 1122334455667788h
nop
mov rdx, 1122334455667788h
nop
mov rbx, 1122334455667788h
nop
mov rsp, 1122334455667788h
nop
mov rbp, 1122334455667788h
nop
mov rsi, 1122334455667788h
nop
mov rdi, 1122334455667788h
nop
mov r8, 1122334455667788h
nop
mov r9, 1122334455667788h
nop
mov r10, 1122334455667788h
nop
mov r11, 1122334455667788h
nop
mov r12, 1122334455667788h
nop
mov r13, 1122334455667788h
nop
mov r14, 1122334455667788h
nop
mov r15, 1122334455667788h
nop
nop
nop
mov eax, 60
nop
mov edi, 0
nop
syscall
nop
jmp fff
nop
nop
nop
section '.data' writable