mirror of
https://github.com/ringtailsoftware/uvm32.git
synced 2026-06-05 22:43:39 +00:00
76fba39a21
Syscalls now accept two parameters, allowing for things like "int count = read(buf, len)" Rather than providing safe signatures for syscalls, the user is now given helper functions to safely parse incoming values, c-strings and slices.
91 lines
3.5 KiB
C++
91 lines
3.5 KiB
C++
#include "config.h"
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#include "uvm32.h"
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#include "common/uvm32_common_custom.h"
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uint8_t rom[] = {
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0x23, 0x26, 0x11, 0x00, 0xef, 0x00, 0xc0, 0x00, 0xb7, 0x08, 0x00, 0x01,
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0x73, 0x00, 0x00, 0x00, 0x13, 0x01, 0x01, 0xff, 0x23, 0x26, 0x81, 0x00,
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0x37, 0xf5, 0xff, 0xff, 0xb7, 0x15, 0x00, 0x00, 0x37, 0xe6, 0xff, 0xff,
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0x13, 0x07, 0xf0, 0x01, 0xb7, 0x47, 0x00, 0x00, 0xb7, 0x06, 0x00, 0x01,
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0x13, 0x08, 0xd5, 0xcc, 0x93, 0x82, 0x35, 0x33, 0x13, 0x03, 0x76, 0xe6,
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0x93, 0x83, 0x35, 0xb3, 0x13, 0x86, 0x16, 0x00, 0x63, 0xce, 0x02, 0x09,
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0x13, 0x0e, 0x03, 0x00, 0x63, 0xce, 0x63, 0x06, 0x93, 0x0f, 0x00, 0x00,
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0x13, 0x0f, 0x00, 0x00, 0x13, 0x04, 0x00, 0x00, 0x93, 0x0e, 0x00, 0x00,
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0x93, 0x06, 0x00, 0x02, 0x13, 0x85, 0x06, 0xfe, 0x63, 0x64, 0xa7, 0x04,
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0x33, 0x05, 0xff, 0x01, 0x63, 0xe0, 0xa7, 0x04, 0x13, 0x05, 0x00, 0x00,
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0x93, 0x05, 0x00, 0x00, 0x93, 0x08, 0x06, 0x00, 0xb3, 0x8e, 0x8e, 0x02,
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0x33, 0x0f, 0xff, 0x41, 0x13, 0xd4, 0xbe, 0x40, 0xb3, 0x0e, 0xcf, 0x01,
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0x73, 0x00, 0x00, 0x00, 0x33, 0x04, 0x04, 0x01, 0x33, 0x85, 0xde, 0x03,
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0x13, 0x5f, 0xc5, 0x00, 0x33, 0x05, 0x84, 0x02, 0x93, 0x5f, 0xc5, 0x00,
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0x93, 0x86, 0x16, 0x00, 0x6f, 0xf0, 0x9f, 0xfb, 0x13, 0x85, 0x06, 0x00,
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0x93, 0x05, 0x00, 0x00, 0x93, 0x08, 0x00, 0x00, 0x73, 0x00, 0x00, 0x00,
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0x13, 0x0e, 0x1e, 0x09, 0xe3, 0xd6, 0xc3, 0xf9, 0x13, 0x05, 0xa0, 0x00,
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0x93, 0x05, 0x00, 0x00, 0x93, 0x08, 0x00, 0x00, 0x73, 0x00, 0x00, 0x00,
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0x13, 0x08, 0x98, 0x19, 0xe3, 0xd6, 0x02, 0xf7, 0x37, 0x05, 0x00, 0x80,
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0x13, 0x05, 0x05, 0x10, 0x93, 0x08, 0x30, 0x00, 0x93, 0x05, 0x00, 0x00,
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0x73, 0x00, 0x00, 0x00, 0x03, 0x24, 0xc1, 0x00, 0x13, 0x01, 0x01, 0x01,
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0x67, 0x80, 0x00, 0x00, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f,
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0x72, 0x6c, 0x64, 0x00
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};
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uvm32_state_t vmst;
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uvm32_evt_t evt;
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bool isrunning = false;
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uint32_t led_time = 0;
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bool led_state = false;
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void setup(void) {
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Serial.begin(115200);
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pinMode(LED_BUILTIN, OUTPUT);
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isrunning = false;
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}
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void loop(void) {
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// flash LED rapidly to show main loop is still running
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if (millis() > led_time + 50) {
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digitalWrite(LED_BUILTIN, led_state);
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led_state = !led_state;
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led_time = millis();
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}
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if (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_SYSCALL: // vm has paused to handle UVM32_SYSCALL
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switch(evt.data.syscall.code) {
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case UVM32_SYSCALL_PUTC:
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Serial.print((char)uvm32_getval(&vmst, &evt, ARG0));
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break;
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case UVM32_SYSCALL_PRINTLN: {
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const char *str = uvm32_getcstr(&vmst, &evt, ARG0);
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Serial.print(str);
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Serial.println("");
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} break;
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default:
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Serial.println("Unhandled syscall");
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break;
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}
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break;
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case UVM32_EVT_ERR:
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Serial.print("Error: ");
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Serial.println(evt.data.err.errstr);
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isrunning = false;
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break;
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case UVM32_EVT_YIELD:
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break;
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}
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} else {
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Serial.println("Starting VM");
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// setup vm
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uvm32_init(&vmst);
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uvm32_load(&vmst, rom, sizeof(rom));
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isrunning = true;
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delay(2000);
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}
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return;
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}
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