diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-07-20 11:10:55 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-07-20 11:10:55 +0000 |
| commit | 04436769e9ffd0c9f179b586cd97bc446f2e5434 (patch) | |
| tree | 3af5dba33099c030474dc23374919e5a4bb7d6be /sys/uvm/uvm_unix.c | |
| parent | 4473a85d05b48539a5d4db04ae9384b5e4657f48 (diff) | |
accomodations for backward growing stack architectures; art@ k
Diffstat (limited to 'sys/uvm/uvm_unix.c')
| -rw-r--r-- | sys/uvm/uvm_unix.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/sys/uvm/uvm_unix.c b/sys/uvm/uvm_unix.c index 406a1dad197..1afa138a6b3 100644 --- a/sys/uvm/uvm_unix.c +++ b/sys/uvm/uvm_unix.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_unix.c,v 1.2 1999/02/26 05:32:08 art Exp $ */ +/* $OpenBSD: uvm_unix.c,v 1.3 1999/07/20 11:10:54 mickey Exp $ */ /* $NetBSD: uvm_unix.c,v 1.7 1998/10/11 23:18:21 chuck Exp $ */ /* @@ -140,19 +140,31 @@ uvm_grow(p, sp) /* * For user defined stacks (from sendsig). */ +#ifdef MACHINE_STACK_GROWS_UP + if (sp > (vaddr_t)vm->vm_maxsaddr) +#else if (sp < (vaddr_t)vm->vm_maxsaddr) +#endif return (0); /* * For common case of already allocated (from trap). */ +#ifdef MACHINE_STACK_GROWS_UP + if (sp < USRSTACK + ctob(vm->vm_ssize)) +#else if (sp >= USRSTACK - ctob(vm->vm_ssize)) +#endif return (1); /* * Really need to check vs limit and increment stack size if ok. */ +#ifdef MACHINE_STACK_GROWS_UP + si = clrnd(btoc(sp - USRSTACK) - vm->vm_ssize); +#else si = clrnd(btoc(USRSTACK-sp) - vm->vm_ssize); +#endif if (vm->vm_ssize + si > btoc(p->p_rlimit[RLIMIT_STACK].rlim_cur)) return (0); vm->vm_ssize += si; @@ -220,9 +232,14 @@ uvm_coredump(p, vp, cred, chdr) if (end > VM_MAXUSER_ADDRESS) end = VM_MAXUSER_ADDRESS; +#ifdef MACHINE_STACK_GROWS_UP + if (start >= USRSTACK) { + start = USRSTACK; +#else if (start >= (vaddr_t)vm->vm_maxsaddr) { - flag = CORE_STACK; start = trunc_page(USRSTACK - ctob(vm->vm_ssize)); +#endif + flag = CORE_STACK; if (start >= end) continue; } else |