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custom syscall example

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Toby Jaffey 2025-12-10 18:52:01 +00:00
parent 508d41c8c5
commit 30b7ff4791
5 changed files with 120 additions and 0 deletions
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test/custom_syscall/test/tests.c Normal file
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#include <string.h>
#include "unity.h"
#include "uvm32.h"
#include "../common/uvm32_common_custom.h"
#include "rom-header.h"
static uvm32_state_t vmst;
static uvm32_evt_t evt;
void setUp(void) {
// runs before each test
uvm32_init(&vmst);
uvm32_load(&vmst, rom_bin, rom_bin_len);
}
void tearDown(void) {
}
void test_custom_syscall_normal(void) {
// run the vm
uvm32_run(&vmst, &evt, 100);
// check for custom syscall
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, 0xDEADBEEF);
TEST_ASSERT_EQUAL(0xABCD1234, uvm32_getval(&vmst, &evt, ARG0));
TEST_ASSERT_EQUAL(0xDECAFBAD, uvm32_getval(&vmst, &evt, ARG1));
uvm32_setval(&vmst, &evt, RET, 0xAABBCCDD);
uvm32_run(&vmst, &evt, 100);
// check for print syscall
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, UVM32_SYSCALL_PRINT);
const char *str = uvm32_getcstr(&vmst, &evt, ARG0);
TEST_ASSERT_EQUAL(0, strcmp(str, "ok"));
// run vm to completion
uvm32_run(&vmst, &evt, 100);
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_END);
}
void test_custom_syscall_badval(void) {
// run the vm
uvm32_run(&vmst, &evt, 100);
// check for custom syscall
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, 0xDEADBEEF);
TEST_ASSERT_EQUAL(0xABCD1234, uvm32_getval(&vmst, &evt, ARG0));
TEST_ASSERT_EQUAL(0xDECAFBAD, uvm32_getval(&vmst, &evt, ARG1));
uvm32_setval(&vmst, &evt, RET, 0); // send value that is not being expected
uvm32_run(&vmst, &evt, 100);
// check for print syscall
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, UVM32_SYSCALL_PRINT);
const char *str = uvm32_getcstr(&vmst, &evt, ARG0);
TEST_ASSERT_EQUAL(0, strcmp(str, "fail"));
// run vm to completion
uvm32_run(&vmst, &evt, 100);
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_END);
}