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custom syscall example

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This commit is contained in:
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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33
test/custom_syscall/Makefile Normal file
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C_COMPILER=gcc
UNITY_ROOT=../unity
CFLAGS=-std=c99
CFLAGS += -Wall
CFLAGS += -Werror
CFLAGS += -DUVM32_MEMORY_SIZE=16384
SUITE_NAME=tests
TARGET_BASE1=test1
TARGET1 = $(TARGET_BASE1)
SRC_FILES1=$(UNITY_ROOT)/src/unity.c test/${SUITE_NAME}.c test/test_runners/${SUITE_NAME}_Runner.c ../../uvm32/uvm32.c
INC_DIRS=-I$(UNITY_ROOT)/src -I../../uvm32/ -I../../common -Irom
.PHONY: rom
default: $(SRC_FILES1) rom
@$(C_COMPILER) $(CFLAGS) $(INC_DIRS) $(SYMBOLS) $(SRC_FILES1) rom/rom-header.c -o $(TARGET1)
@- ./$(TARGET1)
rom:
@(cd rom && make)
test/test_runners/${SUITE_NAME}_Runner.c: test/${SUITE_NAME}.c
@mkdir -p test/test_runners
@ruby $(UNITY_ROOT)/auto/generate_test_runner.rb test/${SUITE_NAME}.c test/test_runners/${SUITE_NAME}_Runner.c
clean:
rm -rf $(TARGET1) test/test_runners
(cd rom && make clean)

13
test/custom_syscall/rom/Makefile Normal file
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TOPDIR=../../../
PROJECT:=$(shell basename ${PWD})
SRCS=${PROJECT}.c ${TOPDIR}/apps/crt0.S
all: all_common
@# Convert ROM to C file and header
@xxd -i ${PROJECT}.bin > ${PROJECT}-header.c
@echo "extern unsigned char ${PROJECT}_bin[]; extern int ${PROJECT}_bin_len;" > ${PROJECT}-header.h
test: test_common
clean: clean_common
rm -f ${PROJECT}-header.h ${PROJECT}-header.c
include ${TOPDIR}/apps/makefile.common

10
test/custom_syscall/rom/rom.c Normal file
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#include "uvm32_target.h"
void main(void) {
if (0xAABBCCDD == syscall(0xDEADBEEF, 0xABCD1234, 0xDECAFBAD)) {
print("ok");
} else {
print("fail");
}
}

62
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);
}