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Correctly setup the UND stack in cpu_set_upcall(), and the trapframe in

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cpu_thread_setup(), as done in cpu_fork().
This commit is contained in:
cognet 2005-05-24 23:05:26 +00:00
parent 9bcd47137c
commit d1e353d08b
1 changed files with 5 additions and 4 deletions
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9
sys/arm/arm/vm_machdep.c
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@ -51,6 +51,7 @@ __FBSDID("$FreeBSD$");
#include <sys/proc.h>
#include <sys/socketvar.h>
#include <sys/sf_buf.h>
#include <sys/unistd.h>
#include <machine/cpu.h>
#include <machine/pcb.h>
#include <machine/sysarch.h>
@ -106,6 +107,8 @@ cpu_fork(register struct thread *td1, register struct proc *p2,
struct switchframe *sf;
struct mdproc *mdp2;
if ((flags & RFPROC) == 0)
return;
pcb1 = td1->td_pcb;
pcb2 = (struct pcb *)(td2->td_kstack + td2->td_kstack_pages * PAGE_SIZE) - 1;
#ifdef __XSCALE__
@ -267,8 +270,7 @@ cpu_set_upcall(struct thread *td, struct thread *td0)
tf->tf_spsr &= ~PSR_C_bit;
tf->tf_r0 = 0;
td->td_pcb->un_32.pcb32_sp = (u_int)sf;
td->td_pcb->un_32.pcb32_und_sp = td->td_kstack + td->td_kstack_pages
* PAGE_SIZE + USPACE_UNDEF_STACK_TOP;
td->td_pcb->un_32.pcb32_und_sp = td->td_kstack + USPACE_UNDEF_STACK_TOP;
/* Setup to release sched_lock in fork_exit(). */
td->td_md.md_spinlock_count = 1;
@ -317,8 +319,7 @@ cpu_thread_setup(struct thread *td)
td->td_pcb = (struct pcb *)(td->td_kstack + td->td_kstack_pages *
PAGE_SIZE) - 1;
td->td_frame = (struct trapframe *)
((u_int)td->td_kstack + td->td_kstack_pages * PAGE_SIZE +
USPACE_SVC_STACK_TOP - sizeof(struct pcb)) - 1;
((u_int)td->td_kstack + USPACE_SVC_STACK_TOP - sizeof(struct pcb)) - 1;
#ifdef __XSCALE__
pmap_use_minicache(td->td_kstack, td->td_kstack_pages * PAGE_SIZE);
#endif