mirror of
https://github.com/ringtailsoftware/uvm32.git
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55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "uvm32.h"
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#include "../common/uvm32_common_custom.h"
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// Precompiled binary program to print integers
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// This code expects to print via syscall 0x13C (UVM32_SYSCALL_PRINTD in common/uvm32_common_custom.h)
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uint8_t rom[] = {
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0x23, 0x26, 0x11, 0x00, 0xef, 0x00, 0x00, 0x01, 0x93, 0x08, 0x80, 0x13,
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0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13, 0x05, 0x00, 0x00,
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0x93, 0x07, 0xa0, 0x00, 0x93, 0x08, 0xc0, 0x13, 0x73, 0x00, 0x00, 0x00,
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0x13, 0x05, 0x15, 0x00, 0xe3, 0x1a, 0xf5, 0xfe, 0x67, 0x80, 0x00, 0x00
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};
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// Create an identifier for our host handler
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typedef enum {
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F_PRINTD,
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} f_code_t;
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// Map VM syscall UVM32_SYSCALL_PRINTD (0x13C) to F_PRINTD, tell VM to expect write of a U32
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const uvm32_mapping_t env[] = {
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{ .syscall = UVM32_SYSCALL_PRINTD, .typ = UVM32_SYSCALL_TYP_U32_WR, .code = F_PRINTD },
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};
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int main(int argc, char *argv[]) {
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uvm32_state_t vmst;
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uvm32_evt_t evt;
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bool isrunning = true;
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uvm32_init(&vmst, env, sizeof(env) / sizeof(env[0]));
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uvm32_load(&vmst, rom, sizeof(rom));
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while(isrunning) {
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uvm32_run(&vmst, &evt, 100); // num instructions before vm considered hung
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switch(evt.typ) {
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case UVM32_EVT_END:
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isrunning = false;
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break;
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case UVM32_EVT_UVM32_SYSCALL: // vm has paused to handle UVM32_SYSCALL
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switch((f_code_t)evt.data.syscall.code) {
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case F_PRINTD:
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// Type of F_PRINTD is UVM32_SYSCALL_TYP_U32_WR, so expect value in evt.data.syscall.val.u32
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printf("%d\n", evt.data.syscall.val.u32);
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break;
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}
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break;
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default:
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break;
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}
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}
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return 0;
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}
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