Author: kevans
Date: Sat Jan 11 03:15:12 2020
New Revision: 356626
URL: https://svnweb.freebsd.org/changeset/base/356626
Log:
MFC r356355: ssp: knock out some trivial warnings that come up with WARNS=6
A future commit will rebuild this as part of libssp. The exact warnings are
fairly trivially fixed:
- No previous declaration for __stack_chk_guard
- idx is the wrong type, nitems yields a size_t
- Casting away volatile on the tmp_stack_chk_guard directly is a no-no.
Modified:
stable/11/lib/libc/secure/stack_protector.c
Directory Properties:
stable/11/ (props changed)
Changes in other areas also in this revision:
Modified:
stable/12/lib/libc/secure/stack_protector.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/11/lib/libc/secure/stack_protector.c
==============================================================================
--- stable/11/lib/libc/secure/stack_protector.c Sat Jan 11 01:56:57 2020
(r356625)
+++ stable/11/lib/libc/secure/stack_protector.c Sat Jan 11 03:15:12 2020
(r356626)
@@ -58,6 +58,7 @@ __FBSDID("$FreeBSD$");
__attribute__((__constructor__, __used__));
#endif
+extern long __stack_chk_guard[8];
extern int __sysctl(const int *name, u_int namelen, void *oldp,
size_t *oldlenp, void *newp, size_t newlen);
@@ -73,8 +74,8 @@ __guard_setup(void)
{
static const int mib[2] = { CTL_KERN, KERN_ARND };
volatile long tmp_stack_chk_guard[nitems(__stack_chk_guard)];
- size_t len;
- int error, idx;
+ size_t idx, len;
+ int error;
if (__stack_chk_guard[0] != 0)
return;
@@ -84,7 +85,8 @@ __guard_setup(void)
* data into a temporal array, then do manual volatile copy to
* not allow optimizer to call memcpy() behind us.
*/
- error = _elf_aux_info(AT_CANARY, (void *)tmp_stack_chk_guard,
+ error = _elf_aux_info(AT_CANARY,
+ __DEQUALIFY(void *, tmp_stack_chk_guard),
sizeof(tmp_stack_chk_guard));
if (error == 0 && tmp_stack_chk_guard[0] != 0) {
for (idx = 0; idx < nitems(__stack_chk_guard); idx++) {
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