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in uvm_coredump(), avoid dumping parts of the stack multiple times

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while skipping parts of the stack that hasn't been used.
pointed out by SAITOH Masanobu <masanobu@iij.ad.jp>.
This commit is contained in:
chs 2000-08-24 06:09:25 +00:00
parent 2111496e74
commit db3465f65b
1 changed files with 7 additions and 5 deletions
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12
sys/uvm/uvm_unix.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_unix.c,v 1.15 2000/07/10 13:37:00 mrg Exp $ */
/* $NetBSD: uvm_unix.c,v 1.16 2000/08/24 06:09:25 chs Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -185,12 +185,13 @@ uvm_coredump(p, vp, cred, chdr)
struct vmspace *vm = p->p_vmspace;
vm_map_t map = &vm->vm_map;
vm_map_entry_t entry;
vaddr_t start, end;
vaddr_t start, end, maxstack;
struct coreseg cseg;
off_t offset;
int flag, error = 0;
offset = chdr->c_hdrsize + chdr->c_seghdrsize + chdr->c_cpusize;
maxstack = trunc_page(USRSTACK - ctob(vm->vm_ssize));
for (entry = map->header.next; entry != &map->header;
entry = entry->next) {
@ -213,10 +214,11 @@ uvm_coredump(p, vp, cred, chdr)
end = VM_MAXUSER_ADDRESS;
if (start >= (vaddr_t)vm->vm_maxsaddr) {
flag = CORE_STACK;
start = trunc_page(USRSTACK - ctob(vm->vm_ssize));
if (start >= end)
if (end <= maxstack)
continue;
if (start < maxstack)
start = maxstack;
flag = CORE_STACK;
} else
flag = CORE_DATA;