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See to it that `vm_tsize' and `vm_dsize' get set up properly for 

OMAGIC binaries, so obreak(2) doesn't get confused.
This commit is contained in:
pk 1994-08-01 18:49:49 +00:00
parent 7ea51310a8
commit 6c9ba984e5
1 changed files with 12 additions and 2 deletions
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14
sys/kern/exec_aout.c
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@ -1,4 +1,4 @@
/* $NetBSD: exec_aout.c,v 1.12 1994/07/05 03:26:34 glass Exp $ */
/* $NetBSD: exec_aout.c,v 1.13 1994/08/01 18:49:49 pk Exp $ */
/*
* Copyright (c) 1993, 1994 Christopher G. Demetriou
@ -194,7 +194,7 @@ exec_aout_prep_omagic(p, epp)
struct exec_package *epp;
{
struct exec *execp = epp->ep_hdr;
long bsize, baddr;
long dsize, bsize, baddr;
epp->ep_taddr = USRTEXT;
epp->ep_tsize = execp->a_text;
@ -214,6 +214,16 @@ exec_aout_prep_omagic(p, epp)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/*
* Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize);
* obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are
* computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize'
* respectively to page boundaries.
* Compensate `ep_dsize' for the amount of data covered by the last
* text page.
*/
dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, NBPG);
epp->ep_dsize = (dsize > 0) ? dsize : 0;
return exec_aout_setup_stack(p, epp);
}