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src
tests
userprog
sc-boundary-3.c
Go to the documentation of this file.
1
/** Invokes a system call with the system call number positioned
2
such that its first byte is valid but the remaining bytes of
3
the number are in invalid memory. Must kill process. */
4
5
#include <
syscall-nr.h
>
6
#include "
tests/userprog/boundary.h
"
7
#include "
tests/lib.h
"
8
#include "
tests/main.h
"
9
10
void
11
test_main
(
void
)
12
{
13
char
*p =
get_bad_boundary
();
14
p--;
15
*p = 100;
16
17
/* Invoke the system call. */
18
asm
volatile
(
"movl %0, %%esp; int $0x30"
: :
"g"
(p));
19
fail
(
"should have killed process"
);
20
}
get_bad_boundary
void * get_bad_boundary(void)
Returns an address that is invalid, but the preceding bytes are all valid (the highest address in the...
Definition:
boundary.c:42
boundary.h
fail
void fail(const char *format,...)
Definition:
lib.c:40
lib.h
main.h
test_main
void test_main(void)
Invokes a system call with the system call number positioned such that its first byte is valid but th...
Definition:
sc-boundary-3.c:11
syscall-nr.h
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