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Make cpu_set_upcall_kse() and cpu_set_user_tls() work for 32bit process.

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This commit is contained in:
David Xu 2006-09-17 14:54:14 +00:00
parent a855e2b4c0
commit 103c065406
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=162378
1 changed files with 43 additions and 0 deletions
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43
sys/amd64/amd64/vm_machdep.c
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@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
#include "opt_isa.h"
#include "opt_cpu.h"
#include "opt_compat.h"
#include <sys/param.h>
#include <sys/systm.h>
@ -69,6 +70,7 @@ __FBSDID("$FreeBSD$");
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
#include <machine/specialreg.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
@ -79,6 +81,12 @@ __FBSDID("$FreeBSD$");
#include <amd64/isa/isa.h>
#ifdef COMPAT_IA32
extern struct sysentvec ia32_freebsd_sysvec;
#endif
static void cpu_reset_real(void);
#ifdef SMP
static void cpu_reset_proxy(void);
@ -320,6 +328,28 @@ cpu_set_upcall_kse(struct thread *td, void (*entry)(void *), void *arg,
*/
cpu_thread_clean(td);
#ifdef COMPAT_IA32
if (td->td_proc->p_sysent == &ia32_freebsd_sysvec) {
/*
* Set the trap frame to point at the beginning of the uts
* function.
*/
td->td_frame->tf_rbp = 0;
td->td_frame->tf_rsp =
(((uintptr_t)stack->ss_sp + stack->ss_size - 4) & ~0x0f) - 4;
td->td_frame->tf_rip = (uintptr_t)entry;
/*
* Pass the address of the mailbox for this kse to the uts
* function as a parameter on the stack.
*/
suword32((void *)(td->td_frame->tf_rsp + sizeof(int32_t)),
(uint32_t)(uintptr_t)arg);
return;
}
#endif
/*
* Set the trap frame to point at the beginning of the uts
* function.
@ -344,6 +374,19 @@ cpu_set_user_tls(struct thread *td, void *tls_base)
if ((u_int64_t)tls_base >= VM_MAXUSER_ADDRESS)
return (EINVAL);
#ifdef COMPAT_IA32
if (td->td_proc->p_sysent == &ia32_freebsd_sysvec) {
if (td == curthread) {
critical_enter();
td->td_pcb->pcb_gsbase = (register_t)tls_base;
wrmsr(MSR_KGSBASE, td->td_pcb->pcb_gsbase);
critical_exit();
} else {
td->td_pcb->pcb_gsbase = (register_t)tls_base;
}
return (0);
}
#endif
if (td == curthread) {
critical_enter();
td->td_pcb->pcb_fsbase = (register_t)tls_base;