[src/trunk]: src/regress/sys/arch/i386/ldt Don't test call gates, they are no...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9980a2429be9
branches:  trunk
changeset: 356074:9980a2429be9
user:      maxv <maxv%NetBSD.org@localhost>
date:      Wed Aug 30 15:46:19 2017 +0000

description:
Don't test call gates, they are not supported anymore.

diffstat:

 regress/sys/arch/i386/ldt/testldt.c |  81 ++----------------------------------
 1 files changed, 5 insertions(+), 76 deletions(-)

diffs (132 lines):

diff -r cdb426588317 -r 9980a2429be9 regress/sys/arch/i386/ldt/testldt.c
--- a/regress/sys/arch/i386/ldt/testldt.c       Wed Aug 30 15:44:01 2017 +0000
+++ b/regress/sys/arch/i386/ldt/testldt.c       Wed Aug 30 15:46:19 2017 +0000
@@ -1,6 +1,6 @@
-/*     $NetBSD: testldt.c,v 1.16 2016/09/03 08:47:38 maxv Exp $        */
+/*     $NetBSD: testldt.c,v 1.17 2017/08/30 15:46:19 maxv Exp $        */
 
-/*-
+/*
  * Copyright (c) 1993 The NetBSD Foundation, Inc.
  * All rights reserved.
  *
@@ -53,15 +53,6 @@
        return _v;
 }
 
-static unsigned short
-get_cs(void)
-{
-       unsigned short _v;
-
-       __asm ("movw %%cs,%0": "=r" (_v));
-       return _v;
-}
-
 static int
 check_desc(int desc)
 {
@@ -70,15 +61,6 @@
        return get_fs_byte((char *)0);
 }
 
-static void
-gated_call(void)
-{
-       printf("Called from call gate...");
-       __asm volatile("movl %ebp,%esp");
-       __asm volatile("popl %ebp");
-       __asm volatile(".byte 0xcb");
-}
-
 static union descriptor *
 make_sd(void *basep, unsigned limit, int type, int dpl, int seg32, int inpgs)
 {
@@ -99,23 +81,6 @@
        return &d;
 }
 
-static union descriptor *
-make_gd(void *func, unsigned int sel, unsigned stkcpy, int type, int dpl)
-{
-       static union descriptor d;
-       unsigned long offset = (unsigned long)func;
-
-       d.gd.gd_looffset = offset & 0x0000ffff;
-       d.gd.gd_selector = sel & 0xffff;
-       d.gd.gd_stkcpy   = stkcpy & 0x1ff;
-       d.gd.gd_type     = type & 0x1ff;
-       d.gd.gd_dpl      = dpl & 0x3;
-       d.gd.gd_p        = 1;
-       d.gd.gd_hioffset = (offset & 0xffff0000) >> 16;
-
-       return &d;
-}
-
 static const char *
 seg_type_name[] = {
        "SYSNULL", "SYS286TSS", "SYSLDT", "SYS286BSY",
@@ -206,9 +171,8 @@
        union descriptor ldt[MAX_USER_LDT];
        int n, ch;
        int num;
-       unsigned int cs = get_cs();
        unsigned char *data;
-       union descriptor *sd, *gd;
+       union descriptor *sd;
        unsigned char one = 1, two = 2, val;
        struct sigaction segv_act;
        int verbose = 0;
@@ -229,10 +193,8 @@
        }
 
        printf("Testing i386_get_ldt\n");
-       if ((num = i386_get_ldt(0, ldt, MAX_USER_LDT)) < 0)
-               err(2, "get_ldt");
-       if (num == 0)
-               errx(1, "i386_get_ldt() returned empty initial LDT");
+       if ((num = i386_get_ldt(0, ldt, MAX_USER_LDT)) >= 0)
+               err(2, "get_ldt succeeded");
 
        if (verbose) {
                printf("Got %d (initial) LDT entries\n", num);
@@ -275,39 +237,6 @@
                    "expected 0x97, got 0x%x", check_desc(num));
 
        /*
-        * Test a Call Gate
-        */
-       printf("Making call gate\n");
-       fflush(stdout);
-
-       gd = make_gd((void *)gated_call, cs, 0, SDT_SYS386CGT, SEL_UPL);
-       if ((num = i386_set_ldt(4095, gd, 1)) < 0)
-               err(1, "set_ldt: call gate");
-
-       if (verbose) {
-               printf("setldt returned: %d\n", num);
-               printf("Call gate sel = 0x%x\n", LSEL(num, SEL_UPL));
-       }
-
-       if ((n = i386_get_ldt(num, ldt, 1)) < 0)
-               err(1, "get_ldt");
-
-       if (verbose) {
-               printf("Entry %d: ", num);
-               print_ldt(&ldt[0]);
-       }
-
-       printf("Testing call gate...");
-       fflush(stdout);
-       /*
-        * Long call to call gate.
-        * Only the selector matters; offset is irrelevant.
-        */
-       __asm volatile("lcall $0x7fff,$0x0");
-
-       printf("Gated call returned\n");
-
-       /*
         * Test multiple sets.
         */