amd64: Drop segment descriptor details from trap messsages

Segment descriptor contents are fixed on amd64 and not very interesting
compared to the other values that are displayed.

While here, include both the thread and process details of the current
thread and drop redundant output of the trap number.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D56989

1 files changed, 3 insertions, 13 deletions

diff --git a/sys/amd64/amd64/trap.c b/sys/amd64/amd64/trap.c
index fb18b7d06f9e..df9cc44bcbb2 100644
--- a/sys/amd64/amd64/trap.c
+++ b/sys/amd64/amd64/trap.c
@@ -944,13 +944,9 @@ trap_diag(struct trapframe *frame, vm_offset_t eva, const char *type_str)
 {
 	int code;
 	u_int type;
-	struct soft_segment_descriptor softseg;
-	struct user_segment_descriptor *gdt;
 
 	code = frame->tf_err;
 	type = frame->tf_trapno;
-	gdt = *PCPU_PTR(gdt);
-	sdtossd(&gdt[IDXSEL(frame->tf_cs)], &softseg);
 
 	printf("\n%s trap %d: %s while in %s mode\n", type_str, type,
 	    type < nitems(trap_msg) ? trap_msg[type] : UNKNOWN,
@@ -975,11 +971,6 @@ trap_diag(struct trapframe *frame, vm_offset_t eva, const char *type_str)
 	    frame->tf_rsp);
 	printf("frame pointer	        = %#hx:%#lx\n", frame->tf_ss,
 	    frame->tf_rbp);
-	printf("code segment		= base 0x%lx, limit 0x%lx, type 0x%x\n",
-	       softseg.ssd_base, softseg.ssd_limit, softseg.ssd_type);
-	printf("			= DPL %d, pres %d, long %d, def32 %d, gran %d\n",
-	       softseg.ssd_dpl, softseg.ssd_p, softseg.ssd_long, softseg.ssd_def32,
-	       softseg.ssd_gran);
 	printf("processor eflags	= ");
 	if (frame->tf_rflags & PSL_T)
 		printf("trace trap, ");
@@ -990,8 +981,9 @@ trap_diag(struct trapframe *frame, vm_offset_t eva, const char *type_str)
 	if (frame->tf_rflags & PSL_RF)
 		printf("resume, ");
 	printf("IOPL = %ld\n", (frame->tf_rflags & PSL_IOPL) >> 12);
-	printf("current process		= %d (%s)\n",
-	    curproc->p_pid, curthread->td_name);
+	printf("current thread		= %d/%d (%s/%s)\n",
+	    curproc->p_pid, curthread->td_tid, curproc->p_comm,
+	    curthread->td_name);
 
 	printf("rdi: %016lx rsi: %016lx rdx: %016lx\n", frame->tf_rdi,
 	    frame->tf_rsi, frame->tf_rdx);
@@ -1003,8 +995,6 @@ trap_diag(struct trapframe *frame, vm_offset_t eva, const char *type_str)
 	    frame->tf_r11, frame->tf_r12);
 	printf("r13: %016lx r14: %016lx r15: %016lx\n", frame->tf_r13,
 	    frame->tf_r14, frame->tf_r15);
-
-	printf("trap number		= %d\n", type);
 }
 
 static void