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https://github.com/ringtailsoftware/uvm32.git
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105 lines
3.9 KiB
C++
105 lines
3.9 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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// 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, 0xc0, 0x00, 0x93, 0x08, 0x80, 0x13,
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0x73, 0x00, 0x00, 0x00, 0x37, 0xf5, 0xff, 0xff, 0xb7, 0x15, 0x00, 0x00,
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0x37, 0xe6, 0xff, 0xff, 0x93, 0x06, 0xf0, 0x01, 0x13, 0x07, 0xd5, 0xcc,
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0x93, 0x87, 0x35, 0x33, 0x13, 0x08, 0x76, 0xe6, 0x93, 0x82, 0x35, 0xb3,
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0x37, 0x43, 0x00, 0x00, 0x63, 0xc8, 0xe7, 0x08, 0x93, 0x03, 0x08, 0x00,
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0x63, 0xca, 0x02, 0x07, 0x93, 0x08, 0x00, 0x00, 0x93, 0x05, 0x00, 0x00,
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0x13, 0x0e, 0x00, 0x00, 0x93, 0x0e, 0x00, 0x00, 0x13, 0x06, 0x00, 0x02,
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0x13, 0x05, 0x06, 0xfe, 0x63, 0xe2, 0xa6, 0x04, 0x33, 0x85, 0x15, 0x01,
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0x63, 0x6e, 0xa3, 0x02, 0x13, 0x05, 0x00, 0x00, 0x33, 0x8e, 0xce, 0x03,
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0xb3, 0x8e, 0x15, 0x41, 0x93, 0x08, 0x90, 0x13, 0x73, 0x00, 0x00, 0x00,
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0x13, 0x5e, 0xbe, 0x40, 0xb3, 0x8e, 0x7e, 0x00, 0x33, 0x0e, 0xee, 0x00,
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0xb3, 0x85, 0xde, 0x03, 0x93, 0xd5, 0xc5, 0x00, 0x33, 0x05, 0xce, 0x03,
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0x93, 0x58, 0xc5, 0x00, 0x13, 0x06, 0x16, 0x00, 0x6f, 0xf0, 0xdf, 0xfb,
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0x93, 0x08, 0x00, 0x14, 0x13, 0x05, 0x06, 0x00, 0x73, 0x00, 0x00, 0x00,
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0x93, 0x83, 0x13, 0x09, 0xe3, 0xda, 0x72, 0xf8, 0x13, 0x05, 0xa0, 0x00,
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0x93, 0x08, 0x00, 0x14, 0x73, 0x00, 0x00, 0x00, 0x13, 0x07, 0x97, 0x19,
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0xe3, 0xdc, 0xe7, 0xf6, 0x37, 0x05, 0x00, 0x80, 0x13, 0x05, 0x05, 0x0e,
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0x93, 0x08, 0xb0, 0x13, 0x73, 0x00, 0x00, 0x00, 0x67, 0x80, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x65, 0x6c, 0x6c,
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0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 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_PRINTLN,
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F_PRINTC,
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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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{ UVM32_SYSCALL_PRINTD, F_PRINTD, UVM32_SYSCALL_TYP_U32_WR },
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{ UVM32_SYSCALL_PRINTC, F_PRINTC, UVM32_SYSCALL_TYP_U32_WR },
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{ UVM32_SYSCALL_PRINTLN, F_PRINTLN, UVM32_SYSCALL_TYP_BUF_TERMINATED_WR },
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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((f_code_t)evt.data.syscall.code) {
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case F_PRINTD:
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Serial.println(evt.data.syscall.val.u32);
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break;
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case F_PRINTC:
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Serial.print((char)evt.data.syscall.val.u32);
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break;
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case F_PRINTLN:
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for (int i=0;i<evt.data.syscall.val.buf.len;i++) {
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Serial.print((char)evt.data.syscall.val.buf.ptr[i]);
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}
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Serial.println("");
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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, env, sizeof(env) / sizeof(env[0]));
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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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