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1. fill in the ldt.sd_xx field, for total compat with linux. 

2. in setregs, use gdt's instead of ldt's because linux wants to play with
   all the ldts. Apparently linuxthreads uses ldt's to allocate space for
   pthread_t's.
This commit is contained in:
christos 2002-03-29 17:01:49 +00:00
parent e6ef08a13e
commit c9e808f0ee
1 changed files with 39 additions and 5 deletions
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44
sys/compat/linux/arch/i386/linux_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: linux_machdep.c,v 1.72 2002/03/22 18:39:23 christos Exp $ */ /* $NetBSD: linux_machdep.c,v 1.73 2002/03/29 17:01:49 christos Exp $ */
/*- /*-
* Copyright (c) 1995, 2000 The NetBSD Foundation, Inc. * Copyright (c) 1995, 2000 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.72 2002/03/22 18:39:23 christos Exp $"); __KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.73 2002/03/29 17:01:49 christos Exp $");
#if defined(_KERNEL_OPT) #if defined(_KERNEL_OPT)
#include "opt_vm86.h" #include "opt_vm86.h"
@ -133,12 +133,44 @@ linux_setregs(p, epp, stack)
u_long stack; u_long stack;
{ {
struct pcb *pcb = &p->p_addr->u_pcb; struct pcb *pcb = &p->p_addr->u_pcb;
struct trapframe *tf;
setregs(p, epp, stack); #if NNPX > 0
if (i386_use_fxsave) /* If we were using the FPU, forget about it. */
if (npxproc == p)
npxdrop();
#endif
#ifdef USER_LDT
pmap_ldt_cleanup(p);
#endif
p->p_md.md_flags &= ~MDP_USEDFPU;
pcb->pcb_flags = 0;
if (i386_use_fxsave) {
pcb->pcb_savefpu.sv_xmm.sv_env.en_cw = __Linux_NPXCW__; pcb->pcb_savefpu.sv_xmm.sv_env.en_cw = __Linux_NPXCW__;
else pcb->pcb_savefpu.sv_xmm.sv_env.en_mxcsr = __INITIAL_MXCSR__;
} else
pcb->pcb_savefpu.sv_87.sv_env.en_cw = __Linux_NPXCW__; pcb->pcb_savefpu.sv_87.sv_env.en_cw = __Linux_NPXCW__;
tf = p->p_md.md_regs;
tf->tf_gs = GSEL(GUDATA_SEL, SEL_UPL);
tf->tf_fs = GSEL(GUDATA_SEL, SEL_UPL);
tf->tf_es = GSEL(GUDATA_SEL, SEL_UPL);
tf->tf_ds = GSEL(GUDATA_SEL, SEL_UPL);
tf->tf_edi = 0;
tf->tf_esi = 0;
tf->tf_ebp = 0;
tf->tf_ebx = (int)p->p_psstr;
tf->tf_edx = 0;
tf->tf_ecx = 0;
tf->tf_eax = 0;
tf->tf_eip = epp->ep_entry;
tf->tf_cs = GSEL(GUCODE_SEL, SEL_UPL);
tf->tf_eflags = PSL_USERSET;
tf->tf_esp = stack;
tf->tf_ss = GSEL(GUDATA_SEL, SEL_UPL);
} }
/* /*
@ -447,6 +479,8 @@ linux_write_ldt(p, uap, retval)
sd.sd_gran = ldt_info.limit_in_pages; sd.sd_gran = ldt_info.limit_in_pages;
if (!oldmode) if (!oldmode)
sd.sd_xx = ldt_info.useable; sd.sd_xx = ldt_info.useable;
else
sd.sd_xx = 0;
} }
sg = stackgap_init(p, 0); sg = stackgap_init(p, 0);
sl.start = ldt_info.entry_number; sl.start = ldt_info.entry_number;