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Hack to try to help usermode/i386 by setting the EBX register

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This commit is contained in:
reinoud 2011-08-30 16:06:20 +00:00
parent ccc8030189
commit 829370d0ee
1 changed files with 8 additions and 2 deletions
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10
sys/arch/usermode/usermode/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.18 2011/08/29 12:46:58 reinoud Exp $ */
/* $NetBSD: machdep.c,v 1.19 2011/08/30 16:06:20 reinoud Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.18 2011/08/29 12:46:58 reinoud Exp $");
__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.19 2011/08/30 16:06:20 reinoud Exp $");
#include <sys/types.h>
#include <sys/param.h>
@ -150,6 +150,12 @@ printf("\tpcb->pcb_userland_ucp.uc_stack.ss_size = %d\n", (int) pcb->pcb_userlan
ucp->uc_stack.ss_size = pack->ep_ssize;
thunk_makecontext_trapframe2go(ucp, (void *) pack->ep_entry, &pcb->pcb_tf);
#ifdef __i386__
int *reg;
reg = (int *) &ucp->uc_mcontext;
reg[8] = l->l_proc->p_psstrp; /* _REG_EBX */
#endif
printf("updated pcb %p\n", pcb);
printf("\tpcb->pcb_ucp.uc_stack.ss_sp = %p\n", pcb->pcb_ucp.uc_stack.ss_sp);
printf("\tpcb->pcb_ucp.uc_stack.ss_size = %d\n", (int) pcb->pcb_ucp.uc_stack.ss_size);