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Begin code generator.

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This commit is contained in:
Johannes Maier
2024-01-10 16:20:55 +01:00
parent 2d8f9eba01
commit 6b7a4100ae
1 changed files with 22 additions and 6 deletions
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28
vuln.c
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@@ -9,9 +9,9 @@
#define MAX_PROGRAM_LEN 0x1000 #define MAX_PROGRAM_LEN 0x1000
typedef enum Opcode : uint8_t { COUNT_OPCODES } Opcode; typedef enum Opcode : uint8_t { ADD = 1, SHIFT = 2, MOV = 3, COUNT_OPCODES } Opcode;
typedef enum Register : uint8_t { COUNT_REGISTERS } Register; typedef enum Register : uint8_t { A = 0, B = 1, C = 2, D = 3, E = 4, F = 5, COUNT_REGISTERS } Register;
typedef struct Instruction { typedef struct Instruction {
Opcode opcode; Opcode opcode;
@@ -20,7 +20,6 @@ typedef struct Instruction {
typedef int (*exec_func_t)(); typedef int (*exec_func_t)();
static __attribute__((unused)) bool premium_activated = false; static __attribute__((unused)) bool premium_activated = false;
size_t get_size_t(size_t limit) { size_t get_size_t(size_t limit) {
@@ -91,9 +90,26 @@ void exec_code(uint8_t *code) {
_exit(res); _exit(res);
} }
void gen_code(uint8_t *code, Instruction *program) { void write_instr(uint8_t *code, size_t offset, const uint8_t *instr, size_t instr_len) {
(void)code; for (size_t i = 0; i < instr_len; ++i) {
(void)program; code[offset + i] = instr[i];
}
}
void gen_code(uint8_t *code, Instruction *program, size_t program_len) {
Register cur_reg;
size_t acc;
for (size_t pc = 0; pc < program_len; ++pc) {
switch (program[pc].opcode) {
case ADD:
if (program[pc].reg == cur_reg) {
}
default:
puts("Found invalid instruction!");
exit(EXIT_FAILURE);
}
}
} }
int run_jit(Instruction *program, size_t len) { int run_jit(Instruction *program, size_t len) {