From d4522b8e9854178473adcea0fbb84f23f6e744bd Mon Sep 17 00:00:00 2001 From: Felipe Boeira Date: Tue, 8 Jan 2019 18:39:03 +0100 Subject: Initial commit --- src/tests/userprog/sc-bad-sp.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 src/tests/userprog/sc-bad-sp.c (limited to 'src/tests/userprog/sc-bad-sp.c') diff --git a/src/tests/userprog/sc-bad-sp.c b/src/tests/userprog/sc-bad-sp.c new file mode 100644 index 0000000..39cce84 --- /dev/null +++ b/src/tests/userprog/sc-bad-sp.c @@ -0,0 +1,20 @@ +/* Invokes a system call with the stack pointer (%esp) set to a + bad address. The process must be terminated with -1 exit + code. + + For Project 3: The bad address lies approximately 64MB below + the code segment, so there is no ambiguity that this attempt + must be rejected even after stack growth is implemented. + Moreover, a good stack growth heuristics should probably not + grow the stack for the purpose of reading the system call + number and arguments. */ + +#include "tests/lib.h" +#include "tests/main.h" + +void +test_main (void) +{ + asm volatile ("movl $.-(64*1024*1024), %esp; int $0x30"); + fail ("should have called exit(-1)"); +} -- cgit v1.2.1