WINE/user LDT support from John Brezak, ported to FreeBSD by Jeffrey Hsu
<hsu@soda.berkeley.edu>.
This commit is contained in:
David Greenman
parent
6df720041a
commit
da59a31c01
@ -33,7 +33,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swtch.s,v 1.2 1994/01/14 16:23:40 davidg Exp $
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* $Id: swtch.s,v 1.3 1994/01/17 09:32:27 davidg Exp $
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*/
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#include "npx.h" /* for NNPX */
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@ -273,6 +273,21 @@ swfnd:
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movl %ecx,_curproc /* into next process */
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movl %edx,_curpcb
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#ifdef USER_LDT
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cmpl $0, PCB_USERLDT(%edx)
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jnz 1f
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movl __default_ldt,%eax
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cmpl _currentldt,%eax
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je 2f
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lldt __default_ldt
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movl %eax,_currentldt
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jmp 2f
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1: pushl %edx
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call _set_user_ldt
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popl %edx
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2:
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#endif
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pushl %edx /* save p to return */
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/*
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* XXX - 0.0 forgot to save it - is that why this was commented out in 0.1?
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.29 1994/01/21 09:56:05 davidg Exp $
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* $Id: machdep.c,v 1.30 1994/01/31 04:18:32 davidg Exp $
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*/
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#include "npx.h"
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@ -453,9 +453,17 @@ sendsig(catcher, sig, mask, code)
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fp->sf_handler = catcher;
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/* save scratch registers */
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fp->sf_eax = regs[tEAX];
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fp->sf_edx = regs[tEDX];
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fp->sf_ecx = regs[tECX];
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fp->sf_sc.sc_eax = regs[tEAX];
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fp->sf_sc.sc_ebx = regs[tEBX];
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fp->sf_sc.sc_ecx = regs[tECX];
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fp->sf_sc.sc_edx = regs[tEDX];
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fp->sf_sc.sc_esi = regs[tESI];
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fp->sf_sc.sc_edi = regs[tEDI];
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fp->sf_sc.sc_cs = regs[tCS];
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fp->sf_sc.sc_ds = regs[tDS];
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fp->sf_sc.sc_ss = regs[tSS];
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fp->sf_sc.sc_es = regs[tES];
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fp->sf_sc.sc_isp = regs[tISP];
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/*
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* Build the signal context to be used by sigreturn.
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@ -508,9 +516,17 @@ sigreturn(p, uap, retval)
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return(EINVAL);
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/* restore scratch registers */
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regs[tEAX] = fp->sf_eax ;
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regs[tEDX] = fp->sf_edx ;
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regs[tECX] = fp->sf_ecx ;
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regs[tEAX] = scp->sc_eax;
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regs[tEBX] = scp->sc_ebx;
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regs[tECX] = scp->sc_ecx;
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regs[tEDX] = scp->sc_edx;
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regs[tESI] = scp->sc_esi;
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regs[tEDI] = scp->sc_edi;
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regs[tCS] = scp->sc_cs;
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regs[tDS] = scp->sc_ds;
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regs[tES] = scp->sc_es;
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regs[tSS] = scp->sc_ss;
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regs[tISP] = scp->sc_isp;
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if (useracc((caddr_t)scp, sizeof (*scp), 0) == 0)
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return(EINVAL);
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@ -765,32 +781,12 @@ setregs(p, entry, stack)
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/*
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* Initialize segments & interrupt table
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*/
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#define DESCRIPTOR_SIZE 8
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#define GNULL_SEL 0 /* Null Descriptor */
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#define GCODE_SEL 1 /* Kernel Code Descriptor */
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#define GDATA_SEL 2 /* Kernel Data Descriptor */
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#define GLDT_SEL 3 /* LDT - eventually one per process */
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#define GTGATE_SEL 4 /* Process task switch gate */
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#define GPANIC_SEL 5 /* Task state to consider panic from */
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#define GPROC0_SEL 6 /* Task state process slot zero and up */
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#define NGDT GPROC0_SEL+1
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union descriptor gdt[NGDT];
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union descriptor ldt[NLDT]; /* local descriptor table */
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struct gate_descriptor idt[NIDT]; /* interrupt descriptor table */
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unsigned char gdt[GPROC0_SEL+1][DESCRIPTOR_SIZE];
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/* interrupt descriptor table */
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struct gate_descriptor idt[NIDT];
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/* local descriptor table */
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unsigned char ldt[5][DESCRIPTOR_SIZE];
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#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
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#define LSYS5SIGR_SEL 1
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#define L43BSDCALLS_SEL 2 /* notyet */
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#define LUCODE_SEL 3
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#define LUDATA_SEL 4
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/* seperate stack, es,fs,gs sels ? */
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/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
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int _default_ldt, currentldt;
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struct i386tss tss, panic_tss;
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@ -860,7 +856,17 @@ struct soft_segment_descriptor gdt_segs[] = {
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1, /* segment descriptor present */
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0, 0,
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0, /* unused - default 32 vs 16 bit size */
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0 /* limit granularity (byte/page units)*/ }};
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0 /* limit granularity (byte/page units)*/ },
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/* User LDT Descriptor per process */
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{ (int) ldt, /* segment base address */
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(512 * sizeof(union descriptor)-1), /* length */
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SDT_SYSLDT, /* segment type */
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0, /* segment descriptor priority level */
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1, /* segment descriptor present */
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0, 0,
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0, /* unused - default 32 vs 16 bit size */
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0 /* limit granularity (byte/page units)*/ },
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};
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struct soft_segment_descriptor ldt_segs[] = {
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/* Null Descriptor - overwritten by call gate */
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@ -953,7 +959,7 @@ init386(first)
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struct gate_descriptor *gdp;
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extern int sigcode,szsigcode;
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/* table descriptors - used to load tables by microp */
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unsigned short r_gdt[3], r_idt[3];
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struct region_descriptor r_gdt, r_idt;
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int pagesinbase, pagesinext;
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@ -1036,15 +1042,15 @@ init386(first)
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isa_defaultirq();
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#endif
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r_gdt[0] = (unsigned short) (sizeof(gdt) - 1);
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r_gdt[1] = (unsigned short) ((int) gdt & 0xffff);
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r_gdt[2] = (unsigned short) ((int) gdt >> 16);
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r_gdt.rd_limit = sizeof(gdt) - 1;
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r_gdt.rd_base = (int) gdt;
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lgdt(&r_gdt);
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r_idt[0] = (unsigned short) (sizeof(idt) - 1);
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r_idt[1] = (unsigned short) ((int) idt & 0xfffff);
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r_idt[2] = (unsigned short) ((int) idt >> 16);
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r_idt.rd_limit = sizeof(idt) - 1;
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r_idt.rd_base = (int) idt;
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lidt(&r_idt);
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lldt(GSEL(GLDT_SEL, SEL_KPL));
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_default_ldt = GSEL(GLDT_SEL, SEL_KPL);
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lldt(_default_ldt);
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currentldt = _default_ldt;
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#include "ddb.h"
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#if NDDB > 0
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@ -1145,8 +1151,8 @@ init386(first)
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ltr(_gsel_tss);
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/* make a call gate to reenter kernel with */
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gdp = (struct gate_descriptor *) &ldt[LSYS5CALLS_SEL][0];
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gdp = &ldt[LSYS5CALLS_SEL].gd;
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x = (int) &IDTVEC(syscall);
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gdp->gd_looffset = x++;
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gdp->gd_selector = GSEL(GCODE_SEL,SEL_KPL);
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@ -33,7 +33,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swtch.s,v 1.2 1994/01/14 16:23:40 davidg Exp $
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* $Id: swtch.s,v 1.3 1994/01/17 09:32:27 davidg Exp $
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*/
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#include "npx.h" /* for NNPX */
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@ -273,6 +273,21 @@ swfnd:
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movl %ecx,_curproc /* into next process */
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movl %edx,_curpcb
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#ifdef USER_LDT
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cmpl $0, PCB_USERLDT(%edx)
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jnz 1f
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movl __default_ldt,%eax
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cmpl _currentldt,%eax
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je 2f
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lldt __default_ldt
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movl %eax,_currentldt
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jmp 2f
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1: pushl %edx
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call _set_user_ldt
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popl %edx
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2:
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#endif
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pushl %edx /* save p to return */
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/*
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* XXX - 0.0 forgot to save it - is that why this was commented out in 0.1?
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
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* $Id$
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* $Id: sys_machdep.c,v 1.3 1993/10/16 14:15:10 rgrimes Exp $
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*/
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#include "param.h"
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@ -49,6 +49,13 @@
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#include "buf.h"
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#include "trace.h"
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#ifdef USER_LDT
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#include "user.h"
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#include "machine/cpu.h"
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#include "machine/sysarch.h"
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#include "vm/vm_kern.h" /* for kernel_map */
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#endif
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#ifdef TRACE
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int nvualarm;
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@ -105,3 +112,217 @@ vdoualarm(arg)
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nvualarm--;
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}
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#endif
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#ifdef USER_LDT
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void
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set_user_ldt(struct pcb *pcb)
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{
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gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)pcb->pcb_ldt;
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gdt_segs[GUSERLDT_SEL].ssd_limit = (pcb->pcb_ldt_len * sizeof(union descriptor)) - 1;
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ssdtosd(gdt_segs+GUSERLDT_SEL, gdt+GUSERLDT_SEL);
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lldt(GSEL(GUSERLDT_SEL, SEL_KPL));
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currentldt = GSEL(GUSERLDT_SEL, SEL_KPL);
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}
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struct i386_get_ldt_args {
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int start;
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union descriptor *desc;
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int num;
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};
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int
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i386_get_ldt(p, args, retval)
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struct proc *p;
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char *args;
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int *retval;
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{
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int error = 0;
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struct pcb *pcb = &p->p_addr->u_pcb;
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int nldt, num;
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union descriptor *lp;
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int s;
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struct i386_get_ldt_args ua, *uap;
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if ((error = copyin(args, &ua, sizeof(struct i386_get_ldt_args))) < 0)
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return(error);
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uap = &ua;
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#ifdef DEBUG
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printf("i386_get_ldt: start=%d num=%d descs=%x\n", uap->start, uap->num, uap->desc);
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#endif
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if (uap->start < 0 || uap->num < 0)
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return(EINVAL);
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s = splhigh();
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if (pcb->pcb_ldt) {
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nldt = pcb->pcb_ldt_len;
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num = min(uap->num, nldt);
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lp = &((union descriptor *)(pcb->pcb_ldt))[uap->start];
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} else {
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nldt = sizeof(ldt)/sizeof(ldt[0]);
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num = min(uap->num, nldt);
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lp = &ldt[uap->start];
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}
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if (uap->start > nldt) {
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splx(s);
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return(EINVAL);
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}
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error = copyout(lp, uap->desc, num * sizeof(union descriptor));
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if (!error)
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*retval = num;
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splx(s);
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return(error);
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}
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struct i386_set_ldt_args {
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int start;
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union descriptor *desc;
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int num;
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};
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int
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i386_set_ldt(p, args, retval)
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struct proc *p;
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char *args;
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int *retval;
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{
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int error = 0, i, n;
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struct pcb *pcb = &p->p_addr->u_pcb;
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union descriptor *lp;
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int s;
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struct i386_set_ldt_args ua, *uap;
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if ((error = copyin(args, &ua, sizeof(struct i386_set_ldt_args))) < 0)
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return(error);
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uap = &ua;
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#ifdef DEBUG
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printf("i386_set_ldt: start=%d num=%d descs=%x\n", uap->start, uap->num, uap->desc);
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#endif
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if (uap->start < 0 || uap->num < 0)
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return(EINVAL);
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/* XXX Should be 8192 ! */
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if (uap->start > 512 ||
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(uap->start + uap->num) > 512)
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return(EINVAL);
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/* allocate user ldt */
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if (!pcb->pcb_ldt) {
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union descriptor *new_ldt =
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(union descriptor *)kmem_alloc(kernel_map, 512*sizeof(union descriptor));
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bzero(new_ldt, 512*sizeof(union descriptor));
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bcopy(ldt, new_ldt, sizeof(ldt));
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pcb->pcb_ldt = (caddr_t)new_ldt;
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pcb->pcb_ldt_len = 512; /* XXX need to grow */
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#ifdef DEBUG
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printf("i386_set_ldt(%d): new_ldt=%x\n", p->p_pid, new_ldt);
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#endif
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}
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/* Check descriptors for access violations */
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for (i = 0, n = uap->start; i < uap->num; i++, n++) {
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union descriptor desc, *dp;
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dp = &uap->desc[i];
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error = copyin(dp, &desc, sizeof(union descriptor));
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if (error)
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return(error);
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/* Only user (ring-3) descriptors */
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if (desc.sd.sd_dpl != SEL_UPL)
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return(EACCES);
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/* Must be "present" */
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if (desc.sd.sd_p == 0)
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return(EACCES);
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switch (desc.sd.sd_type) {
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case SDT_SYSNULL:
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case SDT_SYS286CGT:
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case SDT_SYS386CGT:
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break;
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case SDT_MEMRO:
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case SDT_MEMROA:
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case SDT_MEMRW:
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case SDT_MEMRWA:
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case SDT_MEMROD:
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case SDT_MEMRODA:
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case SDT_MEME:
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case SDT_MEMEA:
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case SDT_MEMER:
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case SDT_MEMERA:
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case SDT_MEMEC:
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case SDT_MEMEAC:
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case SDT_MEMERC:
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case SDT_MEMERAC: {
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#if 0
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unsigned long base = (desc.sd.sd_hibase << 24)&0xFF000000;
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base |= (desc.sd.sd_lobase&0x00FFFFFF);
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if (base >= KERNBASE)
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return(EACCES);
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#endif
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break;
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}
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default:
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return(EACCES);
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/*NOTREACHED*/
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}
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}
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s = splhigh();
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/* Fill in range */
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for (i = 0, n = uap->start; i < uap->num && !error; i++, n++) {
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union descriptor desc, *dp;
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dp = &uap->desc[i];
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lp = &((union descriptor *)(pcb->pcb_ldt))[n];
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#ifdef DEBUG
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printf("i386_set_ldt(%d): ldtp=%x\n", p->p_pid, lp);
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#endif
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error = copyin(dp, lp, sizeof(union descriptor));
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}
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if (!error) {
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*retval = uap->start;
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/* need_resched(); */
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}
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splx(s);
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return(error);
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}
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#endif /* USER_LDT */
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struct sysarch_args {
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int op;
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char *parms;
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};
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int
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sysarch(p, uap, retval)
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struct proc *p;
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register struct sysarch_args *uap;
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int *retval;
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{
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int error = 0;
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switch(uap->op) {
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#ifdef USER_LDT
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case I386_GET_LDT:
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error = i386_get_ldt(p, uap->parms, retval);
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break;
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case I386_SET_LDT:
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error = i386_set_ldt(p, uap->parms, retval);
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break;
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#endif
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
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* $Id: frame.h,v 1.6 1993/12/19 00:50:15 wollman Exp $
|
||||
* $Id: frame.h,v 1.7 1994/01/03 07:55:32 davidg Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_FRAME_H_
|
||||
@ -109,9 +109,6 @@ struct sigframe {
|
||||
struct sigcontext *sf_scp;
|
||||
char *sf_addr;
|
||||
sig_t sf_handler;
|
||||
int sf_eax;
|
||||
int sf_edx;
|
||||
int sf_ecx;
|
||||
struct sigcontext sf_sc;
|
||||
};
|
||||
#endif /* _MACHINE_FRAME_H_ */
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)reg.h 5.5 (Berkeley) 1/18/91
|
||||
* $Id: reg.h,v 1.5 1993/12/03 05:10:08 alm Exp $
|
||||
* $Id: reg.h,v 1.6 1994/01/03 07:55:34 davidg Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_REG_H_
|
||||
@ -54,7 +54,7 @@
|
||||
#define tEDI (2)
|
||||
#define tESI (3)
|
||||
#define tEBP (4)
|
||||
|
||||
#define tISP (5)
|
||||
#define tEBX (6)
|
||||
#define tEDX (7)
|
||||
#define tECX (8)
|
||||
|
||||
@ -35,7 +35,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)segments.h 7.1 (Berkeley) 5/9/91
|
||||
* $Id: segments.h,v 1.2 1993/10/16 14:39:30 rgrimes Exp $
|
||||
* $Id: segments.h,v 1.3 1993/11/07 17:43:08 wollman Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_SEGMENTS_H_
|
||||
@ -64,7 +64,8 @@
|
||||
*/
|
||||
struct segment_descriptor {
|
||||
unsigned sd_lolimit:16 ; /* segment extent (lsb) */
|
||||
unsigned sd_lobase:24 ; /* segment base address (lsb) */
|
||||
unsigned sd_lobase:24 __attribute__ ((packed));
|
||||
/* segment base address (lsb) */
|
||||
unsigned sd_type:5 ; /* segment type */
|
||||
unsigned sd_dpl:2 ; /* segment descriptor priority level */
|
||||
unsigned sd_p:1 ; /* segment descriptor present */
|
||||
@ -178,8 +179,8 @@ extern sdtossd() ; /* to encode a sd */
|
||||
* region descriptors, used to load gdt/idt tables before segments yet exist.
|
||||
*/
|
||||
struct region_descriptor {
|
||||
unsigned rd_limit:16; /* segment extent */
|
||||
unsigned rd_base:32; /* base address */
|
||||
unsigned rd_limit:16; /* segment extent */
|
||||
unsigned rd_base:32 __attribute__ ((packed)); /* base address */
|
||||
};
|
||||
|
||||
/*
|
||||
@ -198,4 +199,37 @@ struct region_descriptor {
|
||||
|
||||
#define NIDT 256
|
||||
#define NRSVIDT 32 /* reserved entries for cpu exceptions */
|
||||
|
||||
/*
|
||||
* Entries in the Global Descriptor Table (GDT)
|
||||
*/
|
||||
#define GNULL_SEL 0 /* Null Descriptor */
|
||||
#define GCODE_SEL 1 /* Kernel Code Descriptor */
|
||||
#define GDATA_SEL 2 /* Kernel Data Descriptor */
|
||||
#define GLDT_SEL 3 /* LDT - eventually one per process */
|
||||
#define GTGATE_SEL 4 /* Process task switch gate */
|
||||
#define GPANIC_SEL 5 /* Task state to consider panic from */
|
||||
#define GPROC0_SEL 6 /* Task state process slot zero and up */
|
||||
#define GUSERLDT_SEL 7 /* User LDT */
|
||||
#define NGDT GUSERLDT_SEL+1
|
||||
|
||||
/*
|
||||
* Entries in the Local Descriptor Table (LDT)
|
||||
*/
|
||||
#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
|
||||
#define LSYS5SIGR_SEL 1
|
||||
#define L43BSDCALLS_SEL 2 /* notyet */
|
||||
#define LUCODE_SEL 3
|
||||
#define LUDATA_SEL 4
|
||||
/* seperate stack, es,fs,gs sels ? */
|
||||
/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
|
||||
#define NLDT LUDATA_SEL+1
|
||||
|
||||
#ifdef KERNEL
|
||||
extern int currentldt;
|
||||
extern union descriptor gdt[NGDT];
|
||||
extern union descriptor ldt[NLDT];
|
||||
extern struct soft_segment_descriptor gdt_segs[];
|
||||
#endif
|
||||
|
||||
#endif /* _MACHINE_SEGMENTS_H_ */
|
||||
|
||||
@ -4,7 +4,7 @@
|
||||
#
|
||||
# This kernel is NOT MEANT to be runnable!
|
||||
#
|
||||
# $Id: LINT,v 1.47 1994/01/29 03:17:39 ache Exp $
|
||||
# $Id: LINT,v 1.48 1994/01/29 21:41:36 rgrimes Exp $
|
||||
#
|
||||
|
||||
machine "i386"
|
||||
@ -55,6 +55,8 @@ options "EXCLUDE_MPU401" # \ exclude specified
|
||||
options EXCLUDE_GUS # / device or chip
|
||||
options EXCLUDE_SBPRO # / from driver
|
||||
|
||||
options USER_LDT #allow user-level control of i386 ldt
|
||||
|
||||
#
|
||||
# options that are in sys/conf/files
|
||||
#
|
||||
|
||||
@ -4,7 +4,7 @@
|
||||
#
|
||||
# This kernel is NOT MEANT to be runnable!
|
||||
#
|
||||
# $Id: LINT,v 1.47 1994/01/29 03:17:39 ache Exp $
|
||||
# $Id: LINT,v 1.48 1994/01/29 21:41:36 rgrimes Exp $
|
||||
#
|
||||
|
||||
machine "i386"
|
||||
@ -55,6 +55,8 @@ options "EXCLUDE_MPU401" # \ exclude specified
|
||||
options EXCLUDE_GUS # / device or chip
|
||||
options EXCLUDE_SBPRO # / from driver
|
||||
|
||||
options USER_LDT #allow user-level control of i386 ldt
|
||||
|
||||
#
|
||||
# options that are in sys/conf/files
|
||||
#
|
||||
|
||||
@ -4,7 +4,7 @@
|
||||
#
|
||||
# This kernel is NOT MEANT to be runnable!
|
||||
#
|
||||
# $Id: LINT,v 1.47 1994/01/29 03:17:39 ache Exp $
|
||||
# $Id: LINT,v 1.48 1994/01/29 21:41:36 rgrimes Exp $
|
||||
#
|
||||
|
||||
machine "i386"
|
||||
@ -55,6 +55,8 @@ options "EXCLUDE_MPU401" # \ exclude specified
|
||||
options EXCLUDE_GUS # / device or chip
|
||||
options EXCLUDE_SBPRO # / from driver
|
||||
|
||||
options USER_LDT #allow user-level control of i386 ldt
|
||||
|
||||
#
|
||||
# options that are in sys/conf/files
|
||||
#
|
||||
|
||||
@ -35,7 +35,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
|
||||
* $Id: machdep.c,v 1.29 1994/01/21 09:56:05 davidg Exp $
|
||||
* $Id: machdep.c,v 1.30 1994/01/31 04:18:32 davidg Exp $
|
||||
*/
|
||||
|
||||
#include "npx.h"
|
||||
@ -453,9 +453,17 @@ sendsig(catcher, sig, mask, code)
|
||||
fp->sf_handler = catcher;
|
||||
|
||||
/* save scratch registers */
|
||||
fp->sf_eax = regs[tEAX];
|
||||
fp->sf_edx = regs[tEDX];
|
||||
fp->sf_ecx = regs[tECX];
|
||||
fp->sf_sc.sc_eax = regs[tEAX];
|
||||
fp->sf_sc.sc_ebx = regs[tEBX];
|
||||
fp->sf_sc.sc_ecx = regs[tECX];
|
||||
fp->sf_sc.sc_edx = regs[tEDX];
|
||||
fp->sf_sc.sc_esi = regs[tESI];
|
||||
fp->sf_sc.sc_edi = regs[tEDI];
|
||||
fp->sf_sc.sc_cs = regs[tCS];
|
||||
fp->sf_sc.sc_ds = regs[tDS];
|
||||
fp->sf_sc.sc_ss = regs[tSS];
|
||||
fp->sf_sc.sc_es = regs[tES];
|
||||
fp->sf_sc.sc_isp = regs[tISP];
|
||||
|
||||
/*
|
||||
* Build the signal context to be used by sigreturn.
|
||||
@ -508,9 +516,17 @@ sigreturn(p, uap, retval)
|
||||
return(EINVAL);
|
||||
|
||||
/* restore scratch registers */
|
||||
regs[tEAX] = fp->sf_eax ;
|
||||
regs[tEDX] = fp->sf_edx ;
|
||||
regs[tECX] = fp->sf_ecx ;
|
||||
regs[tEAX] = scp->sc_eax;
|
||||
regs[tEBX] = scp->sc_ebx;
|
||||
regs[tECX] = scp->sc_ecx;
|
||||
regs[tEDX] = scp->sc_edx;
|
||||
regs[tESI] = scp->sc_esi;
|
||||
regs[tEDI] = scp->sc_edi;
|
||||
regs[tCS] = scp->sc_cs;
|
||||
regs[tDS] = scp->sc_ds;
|
||||
regs[tES] = scp->sc_es;
|
||||
regs[tSS] = scp->sc_ss;
|
||||
regs[tISP] = scp->sc_isp;
|
||||
|
||||
if (useracc((caddr_t)scp, sizeof (*scp), 0) == 0)
|
||||
return(EINVAL);
|
||||
@ -765,32 +781,12 @@ setregs(p, entry, stack)
|
||||
/*
|
||||
* Initialize segments & interrupt table
|
||||
*/
|
||||
#define DESCRIPTOR_SIZE 8
|
||||
|
||||
#define GNULL_SEL 0 /* Null Descriptor */
|
||||
#define GCODE_SEL 1 /* Kernel Code Descriptor */
|
||||
#define GDATA_SEL 2 /* Kernel Data Descriptor */
|
||||
#define GLDT_SEL 3 /* LDT - eventually one per process */
|
||||
#define GTGATE_SEL 4 /* Process task switch gate */
|
||||
#define GPANIC_SEL 5 /* Task state to consider panic from */
|
||||
#define GPROC0_SEL 6 /* Task state process slot zero and up */
|
||||
#define NGDT GPROC0_SEL+1
|
||||
union descriptor gdt[NGDT];
|
||||
union descriptor ldt[NLDT]; /* local descriptor table */
|
||||
struct gate_descriptor idt[NIDT]; /* interrupt descriptor table */
|
||||
|
||||
unsigned char gdt[GPROC0_SEL+1][DESCRIPTOR_SIZE];
|
||||
|
||||
/* interrupt descriptor table */
|
||||
struct gate_descriptor idt[NIDT];
|
||||
|
||||
/* local descriptor table */
|
||||
unsigned char ldt[5][DESCRIPTOR_SIZE];
|
||||
#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
|
||||
#define LSYS5SIGR_SEL 1
|
||||
|
||||
#define L43BSDCALLS_SEL 2 /* notyet */
|
||||
#define LUCODE_SEL 3
|
||||
#define LUDATA_SEL 4
|
||||
/* seperate stack, es,fs,gs sels ? */
|
||||
/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
|
||||
int _default_ldt, currentldt;
|
||||
|
||||
struct i386tss tss, panic_tss;
|
||||
|
||||
@ -860,7 +856,17 @@ struct soft_segment_descriptor gdt_segs[] = {
|
||||
1, /* segment descriptor present */
|
||||
0, 0,
|
||||
0, /* unused - default 32 vs 16 bit size */
|
||||
0 /* limit granularity (byte/page units)*/ }};
|
||||
0 /* limit granularity (byte/page units)*/ },
|
||||
/* User LDT Descriptor per process */
|
||||
{ (int) ldt, /* segment base address */
|
||||
(512 * sizeof(union descriptor)-1), /* length */
|
||||
SDT_SYSLDT, /* segment type */
|
||||
0, /* segment descriptor priority level */
|
||||
1, /* segment descriptor present */
|
||||
0, 0,
|
||||
0, /* unused - default 32 vs 16 bit size */
|
||||
0 /* limit granularity (byte/page units)*/ },
|
||||
};
|
||||
|
||||
struct soft_segment_descriptor ldt_segs[] = {
|
||||
/* Null Descriptor - overwritten by call gate */
|
||||
@ -953,7 +959,7 @@ init386(first)
|
||||
struct gate_descriptor *gdp;
|
||||
extern int sigcode,szsigcode;
|
||||
/* table descriptors - used to load tables by microp */
|
||||
unsigned short r_gdt[3], r_idt[3];
|
||||
struct region_descriptor r_gdt, r_idt;
|
||||
int pagesinbase, pagesinext;
|
||||
|
||||
|
||||
@ -1036,15 +1042,15 @@ init386(first)
|
||||
isa_defaultirq();
|
||||
#endif
|
||||
|
||||
r_gdt[0] = (unsigned short) (sizeof(gdt) - 1);
|
||||
r_gdt[1] = (unsigned short) ((int) gdt & 0xffff);
|
||||
r_gdt[2] = (unsigned short) ((int) gdt >> 16);
|
||||
r_gdt.rd_limit = sizeof(gdt) - 1;
|
||||
r_gdt.rd_base = (int) gdt;
|
||||
lgdt(&r_gdt);
|
||||
r_idt[0] = (unsigned short) (sizeof(idt) - 1);
|
||||
r_idt[1] = (unsigned short) ((int) idt & 0xfffff);
|
||||
r_idt[2] = (unsigned short) ((int) idt >> 16);
|
||||
r_idt.rd_limit = sizeof(idt) - 1;
|
||||
r_idt.rd_base = (int) idt;
|
||||
lidt(&r_idt);
|
||||
lldt(GSEL(GLDT_SEL, SEL_KPL));
|
||||
_default_ldt = GSEL(GLDT_SEL, SEL_KPL);
|
||||
lldt(_default_ldt);
|
||||
currentldt = _default_ldt;
|
||||
|
||||
#include "ddb.h"
|
||||
#if NDDB > 0
|
||||
@ -1145,8 +1151,8 @@ init386(first)
|
||||
ltr(_gsel_tss);
|
||||
|
||||
/* make a call gate to reenter kernel with */
|
||||
gdp = (struct gate_descriptor *) &ldt[LSYS5CALLS_SEL][0];
|
||||
|
||||
gdp = &ldt[LSYS5CALLS_SEL].gd;
|
||||
|
||||
x = (int) &IDTVEC(syscall);
|
||||
gdp->gd_looffset = x++;
|
||||
gdp->gd_selector = GSEL(GCODE_SEL,SEL_KPL);
|
||||
|
||||
@ -33,7 +33,7 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: swtch.s,v 1.2 1994/01/14 16:23:40 davidg Exp $
|
||||
* $Id: swtch.s,v 1.3 1994/01/17 09:32:27 davidg Exp $
|
||||
*/
|
||||
|
||||
#include "npx.h" /* for NNPX */
|
||||
@ -273,6 +273,21 @@ swfnd:
|
||||
movl %ecx,_curproc /* into next process */
|
||||
movl %edx,_curpcb
|
||||
|
||||
#ifdef USER_LDT
|
||||
cmpl $0, PCB_USERLDT(%edx)
|
||||
jnz 1f
|
||||
movl __default_ldt,%eax
|
||||
cmpl _currentldt,%eax
|
||||
je 2f
|
||||
lldt __default_ldt
|
||||
movl %eax,_currentldt
|
||||
jmp 2f
|
||||
1: pushl %edx
|
||||
call _set_user_ldt
|
||||
popl %edx
|
||||
2:
|
||||
#endif
|
||||
|
||||
pushl %edx /* save p to return */
|
||||
/*
|
||||
* XXX - 0.0 forgot to save it - is that why this was commented out in 0.1?
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
|
||||
* $Id$
|
||||
* $Id: sys_machdep.c,v 1.3 1993/10/16 14:15:10 rgrimes Exp $
|
||||
*/
|
||||
|
||||
#include "param.h"
|
||||
@ -49,6 +49,13 @@
|
||||
#include "buf.h"
|
||||
#include "trace.h"
|
||||
|
||||
#ifdef USER_LDT
|
||||
#include "user.h"
|
||||
#include "machine/cpu.h"
|
||||
#include "machine/sysarch.h"
|
||||
#include "vm/vm_kern.h" /* for kernel_map */
|
||||
#endif
|
||||
|
||||
#ifdef TRACE
|
||||
int nvualarm;
|
||||
|
||||
@ -105,3 +112,217 @@ vdoualarm(arg)
|
||||
nvualarm--;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef USER_LDT
|
||||
void
|
||||
set_user_ldt(struct pcb *pcb)
|
||||
{
|
||||
gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)pcb->pcb_ldt;
|
||||
gdt_segs[GUSERLDT_SEL].ssd_limit = (pcb->pcb_ldt_len * sizeof(union descriptor)) - 1;
|
||||
ssdtosd(gdt_segs+GUSERLDT_SEL, gdt+GUSERLDT_SEL);
|
||||
lldt(GSEL(GUSERLDT_SEL, SEL_KPL));
|
||||
currentldt = GSEL(GUSERLDT_SEL, SEL_KPL);
|
||||
}
|
||||
|
||||
struct i386_get_ldt_args {
|
||||
int start;
|
||||
union descriptor *desc;
|
||||
int num;
|
||||
};
|
||||
|
||||
int
|
||||
i386_get_ldt(p, args, retval)
|
||||
struct proc *p;
|
||||
char *args;
|
||||
int *retval;
|
||||
{
|
||||
int error = 0;
|
||||
struct pcb *pcb = &p->p_addr->u_pcb;
|
||||
int nldt, num;
|
||||
union descriptor *lp;
|
||||
int s;
|
||||
struct i386_get_ldt_args ua, *uap;
|
||||
|
||||
if ((error = copyin(args, &ua, sizeof(struct i386_get_ldt_args))) < 0)
|
||||
return(error);
|
||||
|
||||
uap = &ua;
|
||||
#ifdef DEBUG
|
||||
printf("i386_get_ldt: start=%d num=%d descs=%x\n", uap->start, uap->num, uap->desc);
|
||||
#endif
|
||||
|
||||
if (uap->start < 0 || uap->num < 0)
|
||||
return(EINVAL);
|
||||
|
||||
s = splhigh();
|
||||
|
||||
if (pcb->pcb_ldt) {
|
||||
nldt = pcb->pcb_ldt_len;
|
||||
num = min(uap->num, nldt);
|
||||
lp = &((union descriptor *)(pcb->pcb_ldt))[uap->start];
|
||||
} else {
|
||||
nldt = sizeof(ldt)/sizeof(ldt[0]);
|
||||
num = min(uap->num, nldt);
|
||||
lp = &ldt[uap->start];
|
||||
}
|
||||
if (uap->start > nldt) {
|
||||
splx(s);
|
||||
return(EINVAL);
|
||||
}
|
||||
|
||||
error = copyout(lp, uap->desc, num * sizeof(union descriptor));
|
||||
if (!error)
|
||||
*retval = num;
|
||||
|
||||
splx(s);
|
||||
return(error);
|
||||
}
|
||||
|
||||
struct i386_set_ldt_args {
|
||||
int start;
|
||||
union descriptor *desc;
|
||||
int num;
|
||||
};
|
||||
|
||||
int
|
||||
i386_set_ldt(p, args, retval)
|
||||
struct proc *p;
|
||||
char *args;
|
||||
int *retval;
|
||||
{
|
||||
int error = 0, i, n;
|
||||
struct pcb *pcb = &p->p_addr->u_pcb;
|
||||
union descriptor *lp;
|
||||
int s;
|
||||
struct i386_set_ldt_args ua, *uap;
|
||||
|
||||
if ((error = copyin(args, &ua, sizeof(struct i386_set_ldt_args))) < 0)
|
||||
return(error);
|
||||
|
||||
uap = &ua;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("i386_set_ldt: start=%d num=%d descs=%x\n", uap->start, uap->num, uap->desc);
|
||||
#endif
|
||||
|
||||
if (uap->start < 0 || uap->num < 0)
|
||||
return(EINVAL);
|
||||
|
||||
/* XXX Should be 8192 ! */
|
||||
if (uap->start > 512 ||
|
||||
(uap->start + uap->num) > 512)
|
||||
return(EINVAL);
|
||||
|
||||
/* allocate user ldt */
|
||||
if (!pcb->pcb_ldt) {
|
||||
union descriptor *new_ldt =
|
||||
(union descriptor *)kmem_alloc(kernel_map, 512*sizeof(union descriptor));
|
||||
bzero(new_ldt, 512*sizeof(union descriptor));
|
||||
bcopy(ldt, new_ldt, sizeof(ldt));
|
||||
pcb->pcb_ldt = (caddr_t)new_ldt;
|
||||
pcb->pcb_ldt_len = 512; /* XXX need to grow */
|
||||
#ifdef DEBUG
|
||||
printf("i386_set_ldt(%d): new_ldt=%x\n", p->p_pid, new_ldt);
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Check descriptors for access violations */
|
||||
for (i = 0, n = uap->start; i < uap->num; i++, n++) {
|
||||
union descriptor desc, *dp;
|
||||
dp = &uap->desc[i];
|
||||
error = copyin(dp, &desc, sizeof(union descriptor));
|
||||
if (error)
|
||||
return(error);
|
||||
|
||||
/* Only user (ring-3) descriptors */
|
||||
if (desc.sd.sd_dpl != SEL_UPL)
|
||||
return(EACCES);
|
||||
|
||||
/* Must be "present" */
|
||||
if (desc.sd.sd_p == 0)
|
||||
return(EACCES);
|
||||
|
||||
switch (desc.sd.sd_type) {
|
||||
case SDT_SYSNULL:
|
||||
case SDT_SYS286CGT:
|
||||
case SDT_SYS386CGT:
|
||||
break;
|
||||
case SDT_MEMRO:
|
||||
case SDT_MEMROA:
|
||||
case SDT_MEMRW:
|
||||
case SDT_MEMRWA:
|
||||
case SDT_MEMROD:
|
||||
case SDT_MEMRODA:
|
||||
case SDT_MEME:
|
||||
case SDT_MEMEA:
|
||||
case SDT_MEMER:
|
||||
case SDT_MEMERA:
|
||||
case SDT_MEMEC:
|
||||
case SDT_MEMEAC:
|
||||
case SDT_MEMERC:
|
||||
case SDT_MEMERAC: {
|
||||
#if 0
|
||||
unsigned long base = (desc.sd.sd_hibase << 24)&0xFF000000;
|
||||
base |= (desc.sd.sd_lobase&0x00FFFFFF);
|
||||
if (base >= KERNBASE)
|
||||
return(EACCES);
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
default:
|
||||
return(EACCES);
|
||||
/*NOTREACHED*/
|
||||
}
|
||||
}
|
||||
|
||||
s = splhigh();
|
||||
|
||||
/* Fill in range */
|
||||
for (i = 0, n = uap->start; i < uap->num && !error; i++, n++) {
|
||||
union descriptor desc, *dp;
|
||||
dp = &uap->desc[i];
|
||||
lp = &((union descriptor *)(pcb->pcb_ldt))[n];
|
||||
#ifdef DEBUG
|
||||
printf("i386_set_ldt(%d): ldtp=%x\n", p->p_pid, lp);
|
||||
#endif
|
||||
error = copyin(dp, lp, sizeof(union descriptor));
|
||||
}
|
||||
if (!error) {
|
||||
*retval = uap->start;
|
||||
/* need_resched(); */
|
||||
}
|
||||
|
||||
splx(s);
|
||||
return(error);
|
||||
}
|
||||
#endif /* USER_LDT */
|
||||
|
||||
struct sysarch_args {
|
||||
int op;
|
||||
char *parms;
|
||||
};
|
||||
|
||||
int
|
||||
sysarch(p, uap, retval)
|
||||
struct proc *p;
|
||||
register struct sysarch_args *uap;
|
||||
int *retval;
|
||||
{
|
||||
int error = 0;
|
||||
|
||||
switch(uap->op) {
|
||||
#ifdef USER_LDT
|
||||
case I386_GET_LDT:
|
||||
error = i386_get_ldt(p, uap->parms, retval);
|
||||
break;
|
||||
|
||||
case I386_SET_LDT:
|
||||
error = i386_set_ldt(p, uap->parms, retval);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
error = EINVAL;
|
||||
break;
|
||||
}
|
||||
return(error);
|
||||
}
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
|
||||
* $Id: frame.h,v 1.6 1993/12/19 00:50:15 wollman Exp $
|
||||
* $Id: frame.h,v 1.7 1994/01/03 07:55:32 davidg Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_FRAME_H_
|
||||
@ -109,9 +109,6 @@ struct sigframe {
|
||||
struct sigcontext *sf_scp;
|
||||
char *sf_addr;
|
||||
sig_t sf_handler;
|
||||
int sf_eax;
|
||||
int sf_edx;
|
||||
int sf_ecx;
|
||||
struct sigcontext sf_sc;
|
||||
};
|
||||
#endif /* _MACHINE_FRAME_H_ */
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)reg.h 5.5 (Berkeley) 1/18/91
|
||||
* $Id: reg.h,v 1.5 1993/12/03 05:10:08 alm Exp $
|
||||
* $Id: reg.h,v 1.6 1994/01/03 07:55:34 davidg Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_REG_H_
|
||||
@ -54,7 +54,7 @@
|
||||
#define tEDI (2)
|
||||
#define tESI (3)
|
||||
#define tEBP (4)
|
||||
|
||||
#define tISP (5)
|
||||
#define tEBX (6)
|
||||
#define tEDX (7)
|
||||
#define tECX (8)
|
||||
|
||||
@ -35,7 +35,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)segments.h 7.1 (Berkeley) 5/9/91
|
||||
* $Id: segments.h,v 1.2 1993/10/16 14:39:30 rgrimes Exp $
|
||||
* $Id: segments.h,v 1.3 1993/11/07 17:43:08 wollman Exp $
|
||||
*/
|
||||
|
||||
#ifndef _MACHINE_SEGMENTS_H_
|
||||
@ -64,7 +64,8 @@
|
||||
*/
|
||||
struct segment_descriptor {
|
||||
unsigned sd_lolimit:16 ; /* segment extent (lsb) */
|
||||
unsigned sd_lobase:24 ; /* segment base address (lsb) */
|
||||
unsigned sd_lobase:24 __attribute__ ((packed));
|
||||
/* segment base address (lsb) */
|
||||
unsigned sd_type:5 ; /* segment type */
|
||||
unsigned sd_dpl:2 ; /* segment descriptor priority level */
|
||||
unsigned sd_p:1 ; /* segment descriptor present */
|
||||
@ -178,8 +179,8 @@ extern sdtossd() ; /* to encode a sd */
|
||||
* region descriptors, used to load gdt/idt tables before segments yet exist.
|
||||
*/
|
||||
struct region_descriptor {
|
||||
unsigned rd_limit:16; /* segment extent */
|
||||
unsigned rd_base:32; /* base address */
|
||||
unsigned rd_limit:16; /* segment extent */
|
||||
unsigned rd_base:32 __attribute__ ((packed)); /* base address */
|
||||
};
|
||||
|
||||
/*
|
||||
@ -198,4 +199,37 @@ struct region_descriptor {
|
||||
|
||||
#define NIDT 256
|
||||
#define NRSVIDT 32 /* reserved entries for cpu exceptions */
|
||||
|
||||
/*
|
||||
* Entries in the Global Descriptor Table (GDT)
|
||||
*/
|
||||
#define GNULL_SEL 0 /* Null Descriptor */
|
||||
#define GCODE_SEL 1 /* Kernel Code Descriptor */
|
||||
#define GDATA_SEL 2 /* Kernel Data Descriptor */
|
||||
#define GLDT_SEL 3 /* LDT - eventually one per process */
|
||||
#define GTGATE_SEL 4 /* Process task switch gate */
|
||||
#define GPANIC_SEL 5 /* Task state to consider panic from */
|
||||
#define GPROC0_SEL 6 /* Task state process slot zero and up */
|
||||
#define GUSERLDT_SEL 7 /* User LDT */
|
||||
#define NGDT GUSERLDT_SEL+1
|
||||
|
||||
/*
|
||||
* Entries in the Local Descriptor Table (LDT)
|
||||
*/
|
||||
#define LSYS5CALLS_SEL 0 /* forced by intel BCS */
|
||||
#define LSYS5SIGR_SEL 1
|
||||
#define L43BSDCALLS_SEL 2 /* notyet */
|
||||
#define LUCODE_SEL 3
|
||||
#define LUDATA_SEL 4
|
||||
/* seperate stack, es,fs,gs sels ? */
|
||||
/* #define LPOSIXCALLS_SEL 5*/ /* notyet */
|
||||
#define NLDT LUDATA_SEL+1
|
||||
|
||||
#ifdef KERNEL
|
||||
extern int currentldt;
|
||||
extern union descriptor gdt[NGDT];
|
||||
extern union descriptor ldt[NLDT];
|
||||
extern struct soft_segment_descriptor gdt_segs[];
|
||||
#endif
|
||||
|
||||
#endif /* _MACHINE_SEGMENTS_H_ */
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user