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Pull up following revision(s) (requested by maxv in ticket #282): 

regress/sys/arch/i386/ldt/testldt.c: revision 1.17
Don't test call gates, they are not supported anymore.
This commit is contained in:
snj 2017-09-23 17:27:02 +00:00
parent 5f1aa5574b
commit c82c30d825
1 changed files with 5 additions and 76 deletions
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81
regress/sys/arch/i386/ldt/testldt.c
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@ -1,6 +1,6 @@
/* $NetBSD: testldt.c,v 1.16 2016/09/03 08:47:38 maxv Exp $ */
/* $NetBSD: testldt.c,v 1.16.6.1 2017/09/23 17:27:02 snj Exp $ */
/*-
/*
* Copyright (c) 1993 The NetBSD Foundation, Inc.
* All rights reserved.
*
@ -53,15 +53,6 @@ get_fs_byte(const char *addr)
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 @@ check_desc(int desc)
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 @@ make_sd(void *basep, unsigned limit, int type, int dpl, int seg32, int inpgs)
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 @@ main(int argc, char *argv[])
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 @@ main(int argc, char *argv[])
}
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);
@ -274,39 +236,6 @@ main(int argc, char *argv[])
errx(1, "ERROR: descriptor check failed; "
"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.
*/