diff options
Diffstat (limited to 'gcc/config/alpha/osf.h')
| -rw-r--r-- | gcc/config/alpha/osf.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/config/alpha/osf.h b/gcc/config/alpha/osf.h index 0af169cc74b..1e8e505d978 100644 --- a/gcc/config/alpha/osf.h +++ b/gcc/config/alpha/osf.h @@ -108,3 +108,20 @@ Boston, MA 02111-1307, USA. */ #ifndef CROSS_COMPILE #define HAVE_STAMP_H 1 #endif + +/* Attempt to turn on access permissions for the stack. */ + +#define TRANSFER_FROM_TRAMPOLINE \ +void \ +__enable_execute_stack (addr) \ + void *addr; \ +{ \ + long size = getpagesize (); \ + long mask = ~(size-1); \ + char *page = (char *) (((long) addr) & mask); \ + char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ + \ + /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ + if (mprotect (page, end - page, 7) < 0) \ + perror ("mprotect of trampoline code"); \ +} |