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Add test of reading cstring syscall argument which never terminates before hitting end of ram

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This commit is contained in:
Toby Jaffey 2025-12-13 19:12:24 +00:00
parent b1b4cbf583
commit 0018bdd249
4 changed files with 31 additions and 0 deletions
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8
test/syscall_args/rom/rom.c
View file

@ -42,6 +42,11 @@ void syscall_gh_test(void) {
syscall((uint32_t)SYSCALL_H, (uint32_t)buf, 32);
}
void syscall_i_test(void) {
char *p = "hello"; // runner will overwrite memory
syscall((uint32_t)SYSCALL_I, (uint32_t)p, 0);
}
void main(void) {
switch(syscall(SYSCALL_PICKTEST, 0, 0)) {
case SYSCALL_A:
@ -62,6 +67,9 @@ void main(void) {
case SYSCALL_G:
syscall_gh_test();
break;
case SYSCALL_I:
syscall_i_test();
break;
}
}

1
test/syscall_args/shared.h
View file

@ -13,4 +13,5 @@
#define SYSCALL_F SYSCALL_BASE+6
#define SYSCALL_G SYSCALL_BASE+7
#define SYSCALL_H SYSCALL_BASE+8
#define SYSCALL_I SYSCALL_BASE+9

21
test/syscall_args/test/tests.c
View file

@ -169,3 +169,24 @@ void test_syscall_args_buf_pass(void) {
}
}
void test_syscall_args_string_never_terminates(void) {
// run the vm
uvm32_run(&vmst, &evt, 1000);
// check for picktest syscall
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, SYSCALL_PICKTEST);
uvm32_arg_setval(&vmst, &evt, RET, SYSCALL_I);
uvm32_run(&vmst, &evt, 1000);
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
TEST_ASSERT_EQUAL(evt.data.syscall.code, SYSCALL_I);
// To ensure c string read goes off end looking for termination...
memset(vmst._memory, 0xFF, UVM32_MEMORY_SIZE);
TEST_ASSERT_EQUAL(0, strlen(uvm32_arg_getcstr(&vmst, &evt, ARG0)));
// check for error state
uvm32_run(&vmst, &evt, 100);
TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_ERR);
TEST_ASSERT_EQUAL(evt.data.err.errcode, UVM32_ERR_MEM_RD);
}