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i386: print all GPRs, PSL, and CR3 on double fault

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Also compactify the printfs, and remove comment about 'two prints'.
Their arguments are on same page, so one fault implies another.

Reviewed by:	jhb
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D36302
This commit is contained in:
Konstantin Belousov 2022-08-18 07:16:09 +03:00
parent 54e1546e09
commit 0f906b30e6
1 changed files with 14 additions and 6 deletions
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20
sys/i386/i386/trap.c
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@ -988,18 +988,26 @@ trap_user_dtrace(struct trapframe *frame, int (**hookp)(struct trapframe *))
void
dblfault_handler(void)
{
struct i386tss *t;
#ifdef KDTRACE_HOOKS
if (dtrace_doubletrap_func != NULL)
(*dtrace_doubletrap_func)();
#endif
printf("\nFatal double fault:\n");
printf("eip = 0x%x\n", PCPU_GET(common_tssp)->tss_eip);
printf("esp = 0x%x\n", PCPU_GET(common_tssp)->tss_esp);
printf("ebp = 0x%x\n", PCPU_GET(common_tssp)->tss_ebp);
t = PCPU_GET(common_tssp);
printf(
"eip = %#08x esp = %#08x ebp = %#08x eax = %#08x\n"
"edx = %#08x ecx = %#08x edi = %#08x esi = %#08x\n"
"psl = %#08x cs = %#08x ss = %#08x ds = %#08x\n"
"es = %#08x fs = %#08x gs = %#08x cr3 = %#08x\n",
t->tss_eip, t->tss_esp, t->tss_ebp, t->tss_eax,
t->tss_edx, t->tss_ecx, t->tss_edi, t->tss_esi,
t->tss_eflags, t->tss_cs, t->tss_ss, t->tss_ds,
t->tss_es, t->tss_fs, t->tss_gs, t->tss_cr3);
#ifdef SMP
/* two separate prints in case of a trap on an unmapped page */
printf("cpuid = %d; ", PCPU_GET(cpuid));
printf("apic id = %02x\n", PCPU_GET(apic_id));
printf("cpuid = %d; apic id = %02x\n", PCPU_GET(cpuid),
PCPU_GET(apic_id));
#endif
panic("double fault");
}