diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-12-17 01:48:46 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 1999-12-17 01:48:46 +0000 |
| commit | 96abefa42c860535db10b2ce979a2200255413ba (patch) | |
| tree | cfad1a4cb3fe4c6c5142033300a6083df008c633 /sys/arch | |
| parent | 980114d6315fd890cd6743efbb9a34f71b572ff2 (diff) | |
track the maximum accessed stack size; basically this small piece of code is the same in all the archs
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/hppa/hppa/trap.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/sys/arch/hppa/hppa/trap.c b/sys/arch/hppa/hppa/trap.c index b1ac011984c..1902d257363 100644 --- a/sys/arch/hppa/hppa/trap.c +++ b/sys/arch/hppa/hppa/trap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: trap.c,v 1.12 1999/12/08 15:58:27 mickey Exp $ */ +/* $OpenBSD: trap.c,v 1.13 1999/12/17 01:48:45 mickey Exp $ */ /* * Copyright (c) 1998,1999 Michael Shalayeff @@ -154,6 +154,7 @@ trap(type, frame) struct pcb *pcbp; register vaddr_t va; register vm_map_t map; + struct vmspace *vm; register vm_prot_t vftype; register pa_space_t space; u_int opcode; @@ -298,9 +299,27 @@ trap(type, frame) case T_ITLBMISSNA: case T_ITLBMISSNA | T_USER: case T_DTLBMISSNA: case T_DTLBMISSNA | T_USER: va = trunc_page(va); - map = &p->p_vmspace->vm_map; + vm = p->p_vmspace; + map = &vm->vm_map; ret = uvm_fault(map, va, 0, vftype); + + /* + * If this was a stack access we keep track of the maximum + * accessed stack size. Also, if uvm_fault gets a protection + * failure it is due to accessing the stack region outside + * the current limit and we need to reflect that as an access + * error. + */ + if (va >= (vaddr_t)vm->vm_maxsaddr + vm->vm_ssize) { + if (ret == KERN_SUCCESS) { + vsize_t nss = clrnd(btoc(va - USRSTACK + NBPG)); + if (nss > vm->vm_ssize) + vm->vm_ssize = nss; + } else if (ret == KERN_PROTECTION_FAILURE) + ret = KERN_INVALID_ADDRESS; + } + if (ret != KERN_SUCCESS) { if (type & T_USER) { printf("trapsignal: uvm_fault\n"); |