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MFi386: add ddb "show sysregs" command.

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Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2013-07-15 06:30:57 +00:00
parent 05d1f5bce0
commit 0f6bcda4cd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=253352
1 changed files with 30 additions and 0 deletions
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30
sys/amd64/amd64/machdep.c
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@ -1228,6 +1228,36 @@ DB_SHOW_COMMAND(idt, db_show_idt)
ip++;
}
}
/* Show privileged registers. */
DB_SHOW_COMMAND(sysregs, db_show_sysregs)
{
struct {
uint16_t limit;
uint64_t base;
} __packed idtr, gdtr;
uint16_t ldt, tr;
__asm __volatile("sidt %0" : "=m" (idtr));
db_printf("idtr\t0x%016lx/%04x\n",
(u_long)idtr.base, (u_int)idtr.limit);
__asm __volatile("sgdt %0" : "=m" (gdtr));
db_printf("gdtr\t0x%016lx/%04x\n",
(u_long)gdtr.base, (u_int)gdtr.limit);
__asm __volatile("sldt %0" : "=r" (ldt));
db_printf("ldtr\t0x%04x\n", ldt);
__asm __volatile("str %0" : "=r" (tr));
db_printf("tr\t0x%04x\n", tr);
db_printf("cr0\t0x%016lx\n", rcr0());
db_printf("cr2\t0x%016lx\n", rcr2());
db_printf("cr3\t0x%016lx\n", rcr3());
db_printf("cr4\t0x%016lx\n", rcr4());
db_printf("EFER\t%016lx\n", rdmsr(MSR_EFER));
db_printf("FEATURES_CTL\t%016lx\n", rdmsr(MSR_IA32_FEATURE_CONTROL));
db_printf("DEBUG_CTL\t%016lx\n", rdmsr(MSR_DEBUGCTLMSR));
db_printf("PAT\t%016lx\n", rdmsr(MSR_PAT));
db_printf("GSBASE\t%016lx\n", rdmsr(MSR_GSBASE));
}
#endif
void