Remove BDE_DEBUGGER.

Discussed with:	bde

12 files changed, 10 insertions, 450 deletions

diff --git a/sys/amd64/amd64/exception.S b/sys/amd64/amd64/exception.S
index e1dcc09..d618cb8 100644
--- a/sys/amd64/amd64/exception.S
+++ b/sys/amd64/amd64/exception.S
@@ -81,34 +81,16 @@
 			.type __CONCAT(X,name),@function; __CONCAT(X,name):
 #define	TRAP(a)		pushl $(a) ; jmp alltraps
 
-#ifdef BDE_DEBUGGER
-#define	BDBTRAP(name) \
-	ss ; \
-	cmpb	$0,_bdb_exists ; \
-	je	1f ; \
-	testb	$SEL_RPL_MASK,4(%esp) ; \
-	jne	1f ; \
-	ss ; \
-	.globl	__CONCAT(__CONCAT(bdb_,name),_ljmp); \
-__CONCAT(__CONCAT(bdb_,name),_ljmp): \
-	ljmp	$0,$0 ; \
-1:
-#else
-#define BDBTRAP(name)
-#endif
-
 MCOUNT_LABEL(user)
 MCOUNT_LABEL(btrap)
 
 IDTVEC(div)
 	pushl $0; TRAP(T_DIVIDE)
 IDTVEC(dbg)
-	BDBTRAP(dbg)
 	pushl $0; TRAP(T_TRCTRAP)
 IDTVEC(nmi)
 	pushl $0; TRAP(T_NMI)
 IDTVEC(bpt)
-	BDBTRAP(bpt)
 	pushl $0; TRAP(T_BPTFLT)
 IDTVEC(ofl)
 	pushl $0; TRAP(T_OFLOW)
diff --git a/sys/amd64/amd64/exception.s b/sys/amd64/amd64/exception.s
index e1dcc09..d618cb8 100644
--- a/sys/amd64/amd64/exception.s
+++ b/sys/amd64/amd64/exception.s
@@ -81,34 +81,16 @@
 			.type __CONCAT(X,name),@function; __CONCAT(X,name):
 #define	TRAP(a)		pushl $(a) ; jmp alltraps
 
-#ifdef BDE_DEBUGGER
-#define	BDBTRAP(name) \
-	ss ; \
-	cmpb	$0,_bdb_exists ; \
-	je	1f ; \
-	testb	$SEL_RPL_MASK,4(%esp) ; \
-	jne	1f ; \
-	ss ; \
-	.globl	__CONCAT(__CONCAT(bdb_,name),_ljmp); \
-__CONCAT(__CONCAT(bdb_,name),_ljmp): \
-	ljmp	$0,$0 ; \
-1:
-#else
-#define BDBTRAP(name)
-#endif
-
 MCOUNT_LABEL(user)
 MCOUNT_LABEL(btrap)
 
 IDTVEC(div)
 	pushl $0; TRAP(T_DIVIDE)
 IDTVEC(dbg)
-	BDBTRAP(dbg)
 	pushl $0; TRAP(T_TRCTRAP)
 IDTVEC(nmi)
 	pushl $0; TRAP(T_NMI)
 IDTVEC(bpt)
-	BDBTRAP(bpt)
 	pushl $0; TRAP(T_BPTFLT)
 IDTVEC(ofl)
 	pushl $0; TRAP(T_OFLOW)
diff --git a/sys/amd64/amd64/locore.S b/sys/amd64/amd64/locore.S
index f6ebc88..7623f10 100644
--- a/sys/amd64/amd64/locore.S
+++ b/sys/amd64/amd64/locore.S
@@ -155,11 +155,6 @@ vm86phystk:	.long	0		/* PA of vm86/bios stack */
 vm86paddr:	.long	0		/* address of vm86 region */
 vm86pa:		.long	0		/* phys addr of vm86 region */
 
-#ifdef BDE_DEBUGGER
-	.globl	_bdb_exists		/* flag to indicate BDE debugger is present */
-_bdb_exists:	.long	0
-#endif
-
 #ifdef PC98
 	.globl	pc98_system_parameter
 pc98_system_parameter:
@@ -232,16 +227,6 @@ NON_GPROF_ENTRY(btext)
 	rep
 	movsb
 #else	/* IBM-PC */
-#ifdef BDE_DEBUGGER
-#ifdef BIOS_STEALS_3K
-	cmpl	$0x0375c339,0x95504
-#else
-	cmpl	$0x0375c339,0x96104	/* XXX - debugger signature */
-#endif
-	jne	1f
-	movb	$1,R(_bdb_exists)
-1:
-#endif
 /* Tell the bios to warmboot next time */
 	movw	$0x1234,0x472
 #endif	/* PC98 */
@@ -314,8 +299,8 @@ NON_GPROF_ENTRY(btext)
  *
  * XXX the gdt and idt are still somewhere in the boot program.  We
  * depend on the convention that the boot program is below 1MB and we
- * are above 1MB to keep the gdt and idt  away from the bss and page
- * tables.  The idt is only used if BDE_DEBUGGER is enabled.
+ * are above 1MB to keep the gdt and idt away from the bss and page
+ * tables.
  */
 	movl	$R(end),%ecx
 	movl	$R(edata),%edi
@@ -337,14 +322,6 @@ NON_GPROF_ENTRY(btext)
 	movl	%eax, %cr4
 1:
 
-#ifdef BDE_DEBUGGER
-/*
- * Adjust as much as possible for paging before enabling paging so that the
- * adjustments can be traced.
- */
-	call	bdb_prepare_paging
-#endif
-
 /* Now enable paging */
 	movl	R(IdlePTD), %eax
 	movl	%eax,%cr3		/* load ptd addr into mmu */
@@ -352,15 +329,6 @@ NON_GPROF_ENTRY(btext)
 	orl	$CR0_PE|CR0_PG,%eax	/* enable paging */
 	movl	%eax,%cr0		/* and let's page NOW! */
 
-#ifdef BDE_DEBUGGER
-/*
- * Complete the adjustments for paging so that we can keep tracing through
- * initi386() after the low (physical) addresses for the gdt and idt become
- * invalid.
- */
-	call	bdb_commit_paging
-#endif
-
 	pushl	$begin			/* jump to high virtualized address */
 	ret
 
@@ -819,11 +787,6 @@ no_kernend:
 
 /* Map read-only from zero to the end of the kernel text section */
 	xorl	%eax, %eax
-#ifdef BDE_DEBUGGER
-/* If the debugger is present, actually map everything read-write. */
-	cmpl	$0,R(_bdb_exists)
-	jne	map_read_write
-#endif
 	xorl	%edx,%edx
 	movl	$R(etext),%ecx
 	addl	$PAGE_MASK,%ecx
@@ -834,7 +797,6 @@ no_kernend:
 	movl	$R(etext),%eax
 	addl	$PAGE_MASK, %eax
 	andl	$~PAGE_MASK, %eax
-map_read_write:
 	movl	$PG_RW,%edx
 	movl	R(KERNend),%ecx
 	subl	%eax,%ecx
@@ -928,83 +890,3 @@ map_read_write:
 	fillkpt(R(IdlePTD), $PG_RW)
 
 	ret
-
-#ifdef BDE_DEBUGGER
-bdb_prepare_paging:
-	cmpl	$0,R(_bdb_exists)
-	je	bdb_prepare_paging_exit
-
-	subl	$6,%esp
-
-	/*
-	 * Copy and convert debugger entries from the bootstrap gdt and idt
-	 * to the kernel gdt and idt.  Everything is still in low memory.
-	 * Tracing continues to work after paging is enabled because the
-	 * low memory addresses remain valid until everything is relocated.
-	 * However, tracing through the setidt() that initializes the trace
-	 * trap will crash.
-	 */
-	sgdt	(%esp)
-	movl	2(%esp),%esi		/* base address of bootstrap gdt */
-	movl	$R(_gdt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel gdt */
-	movl	$8*18/4,%ecx
-	cld
-	rep				/* copy gdt */
-	movsl
-	movl	$R(_gdt),-8+2(%edi)	/* adjust gdt self-ptr */
-	movb	$0x92,-8+5(%edi)
-	lgdt	(%esp)
-
-	sidt	(%esp)
-	movl	2(%esp),%esi		/* base address of current idt */
-	movl	8+4(%esi),%eax		/* convert dbg descriptor to ... */
-	movw	8(%esi),%ax
-	movl	%eax,R(bdb_dbg_ljmp+1)	/* ... immediate offset ... */
-	movl	8+2(%esi),%eax
-	movw	%ax,R(bdb_dbg_ljmp+5)	/* ... and selector for ljmp */
-	movl	24+4(%esi),%eax		/* same for bpt descriptor */
-	movw	24(%esi),%ax
-	movl	%eax,R(bdb_bpt_ljmp+1)
-	movl	24+2(%esi),%eax
-	movw	%ax,R(bdb_bpt_ljmp+5)
-	movl	R(_idt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel idt */
-	movl	$8*4/4,%ecx
-	cld
-	rep				/* copy idt */
-	movsl
-	lidt	(%esp)
-
-	addl	$6,%esp
-
-bdb_prepare_paging_exit:
-	ret
-
-/* Relocate debugger gdt entries and gdt and idt pointers. */
-bdb_commit_paging:
-	cmpl	$0,_bdb_exists
-	je	bdb_commit_paging_exit
-
-	movl	$gdt+8*9,%eax		/* adjust slots 9-17 */
-	movl	$9,%ecx
-reloc_gdt:
-	movb	$KERNBASE>>24,7(%eax)	/* top byte of base addresses, was 0, */
-	addl	$8,%eax			/* now KERNBASE>>24 */
-	loop	reloc_gdt
-
-	subl	$6,%esp
-	sgdt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lgdt	(%esp)
-	sidt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lidt	(%esp)
-	addl	$6,%esp
-
-	int	$3
-
-bdb_commit_paging_exit:
-	ret
-
-#endif /* BDE_DEBUGGER */
diff --git a/sys/amd64/amd64/locore.s b/sys/amd64/amd64/locore.s
index f6ebc88..7623f10 100644
--- a/sys/amd64/amd64/locore.s
+++ b/sys/amd64/amd64/locore.s
@@ -155,11 +155,6 @@ vm86phystk:	.long	0		/* PA of vm86/bios stack */
 vm86paddr:	.long	0		/* address of vm86 region */
 vm86pa:		.long	0		/* phys addr of vm86 region */
 
-#ifdef BDE_DEBUGGER
-	.globl	_bdb_exists		/* flag to indicate BDE debugger is present */
-_bdb_exists:	.long	0
-#endif
-
 #ifdef PC98
 	.globl	pc98_system_parameter
 pc98_system_parameter:
@@ -232,16 +227,6 @@ NON_GPROF_ENTRY(btext)
 	rep
 	movsb
 #else	/* IBM-PC */
-#ifdef BDE_DEBUGGER
-#ifdef BIOS_STEALS_3K
-	cmpl	$0x0375c339,0x95504
-#else
-	cmpl	$0x0375c339,0x96104	/* XXX - debugger signature */
-#endif
-	jne	1f
-	movb	$1,R(_bdb_exists)
-1:
-#endif
 /* Tell the bios to warmboot next time */
 	movw	$0x1234,0x472
 #endif	/* PC98 */
@@ -314,8 +299,8 @@ NON_GPROF_ENTRY(btext)
  *
  * XXX the gdt and idt are still somewhere in the boot program.  We
  * depend on the convention that the boot program is below 1MB and we
- * are above 1MB to keep the gdt and idt  away from the bss and page
- * tables.  The idt is only used if BDE_DEBUGGER is enabled.
+ * are above 1MB to keep the gdt and idt away from the bss and page
+ * tables.
  */
 	movl	$R(end),%ecx
 	movl	$R(edata),%edi
@@ -337,14 +322,6 @@ NON_GPROF_ENTRY(btext)
 	movl	%eax, %cr4
 1:
 
-#ifdef BDE_DEBUGGER
-/*
- * Adjust as much as possible for paging before enabling paging so that the
- * adjustments can be traced.
- */
-	call	bdb_prepare_paging
-#endif
-
 /* Now enable paging */
 	movl	R(IdlePTD), %eax
 	movl	%eax,%cr3		/* load ptd addr into mmu */
@@ -352,15 +329,6 @@ NON_GPROF_ENTRY(btext)
 	orl	$CR0_PE|CR0_PG,%eax	/* enable paging */
 	movl	%eax,%cr0		/* and let's page NOW! */
 
-#ifdef BDE_DEBUGGER
-/*
- * Complete the adjustments for paging so that we can keep tracing through
- * initi386() after the low (physical) addresses for the gdt and idt become
- * invalid.
- */
-	call	bdb_commit_paging
-#endif
-
 	pushl	$begin			/* jump to high virtualized address */
 	ret
 
@@ -819,11 +787,6 @@ no_kernend:
 
 /* Map read-only from zero to the end of the kernel text section */
 	xorl	%eax, %eax
-#ifdef BDE_DEBUGGER
-/* If the debugger is present, actually map everything read-write. */
-	cmpl	$0,R(_bdb_exists)
-	jne	map_read_write
-#endif
 	xorl	%edx,%edx
 	movl	$R(etext),%ecx
 	addl	$PAGE_MASK,%ecx
@@ -834,7 +797,6 @@ no_kernend:
 	movl	$R(etext),%eax
 	addl	$PAGE_MASK, %eax
 	andl	$~PAGE_MASK, %eax
-map_read_write:
 	movl	$PG_RW,%edx
 	movl	R(KERNend),%ecx
 	subl	%eax,%ecx
@@ -928,83 +890,3 @@ map_read_write:
 	fillkpt(R(IdlePTD), $PG_RW)
 
 	ret
-
-#ifdef BDE_DEBUGGER
-bdb_prepare_paging:
-	cmpl	$0,R(_bdb_exists)
-	je	bdb_prepare_paging_exit
-
-	subl	$6,%esp
-
-	/*
-	 * Copy and convert debugger entries from the bootstrap gdt and idt
-	 * to the kernel gdt and idt.  Everything is still in low memory.
-	 * Tracing continues to work after paging is enabled because the
-	 * low memory addresses remain valid until everything is relocated.
-	 * However, tracing through the setidt() that initializes the trace
-	 * trap will crash.
-	 */
-	sgdt	(%esp)
-	movl	2(%esp),%esi		/* base address of bootstrap gdt */
-	movl	$R(_gdt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel gdt */
-	movl	$8*18/4,%ecx
-	cld
-	rep				/* copy gdt */
-	movsl
-	movl	$R(_gdt),-8+2(%edi)	/* adjust gdt self-ptr */
-	movb	$0x92,-8+5(%edi)
-	lgdt	(%esp)
-
-	sidt	(%esp)
-	movl	2(%esp),%esi		/* base address of current idt */
-	movl	8+4(%esi),%eax		/* convert dbg descriptor to ... */
-	movw	8(%esi),%ax
-	movl	%eax,R(bdb_dbg_ljmp+1)	/* ... immediate offset ... */
-	movl	8+2(%esi),%eax
-	movw	%ax,R(bdb_dbg_ljmp+5)	/* ... and selector for ljmp */
-	movl	24+4(%esi),%eax		/* same for bpt descriptor */
-	movw	24(%esi),%ax
-	movl	%eax,R(bdb_bpt_ljmp+1)
-	movl	24+2(%esi),%eax
-	movw	%ax,R(bdb_bpt_ljmp+5)
-	movl	R(_idt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel idt */
-	movl	$8*4/4,%ecx
-	cld
-	rep				/* copy idt */
-	movsl
-	lidt	(%esp)
-
-	addl	$6,%esp
-
-bdb_prepare_paging_exit:
-	ret
-
-/* Relocate debugger gdt entries and gdt and idt pointers. */
-bdb_commit_paging:
-	cmpl	$0,_bdb_exists
-	je	bdb_commit_paging_exit
-
-	movl	$gdt+8*9,%eax		/* adjust slots 9-17 */
-	movl	$9,%ecx
-reloc_gdt:
-	movb	$KERNBASE>>24,7(%eax)	/* top byte of base addresses, was 0, */
-	addl	$8,%eax			/* now KERNBASE>>24 */
-	loop	reloc_gdt
-
-	subl	$6,%esp
-	sgdt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lgdt	(%esp)
-	sidt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lidt	(%esp)
-	addl	$6,%esp
-
-	int	$3
-
-bdb_commit_paging_exit:
-	ret
-
-#endif /* BDE_DEBUGGER */
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index 45d295a..55133a7 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -1937,14 +1937,8 @@ init386(first)
 	gdt_segs[GPRIV_SEL].ssd_base = (int) pc;
 	gdt_segs[GPROC0_SEL].ssd_base = (int) &pc->pc_common_tss;
 
-	for (x = 0; x < NGDT; x++) {
-#ifdef BDE_DEBUGGER
-		/* avoid overwriting db entries with APM ones */
-		if (x >= GAPMCODE32_SEL && x <= GAPMDATA_SEL)
-			continue;
-#endif
+	for (x = 0; x < NGDT; x++)
 		ssdtosd(&gdt_segs[x], &gdt[x].sd);
-	}
 
 	r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
 	r_gdt.rd_base =  (int) gdt;
diff --git a/sys/amd64/include/segments.h b/sys/amd64/include/segments.h
index bcbf2fb..95117da 100644
--- a/sys/amd64/include/segments.h
+++ b/sys/amd64/include/segments.h
@@ -199,11 +199,7 @@ struct region_descriptor {
 #define GBIOSUTIL_SEL	13	/* BIOS interface (Utility) */
 #define GBIOSARGS_SEL	14	/* BIOS interface (Arguments) */
 
-#ifdef BDE_DEBUGGER
-#define	NGDT		18	/* some of 11-17 are reserved for debugger */
-#else
 #define NGDT 		15
-#endif
 
 /*
  * Entries in the Local Descriptor Table (LDT)
diff --git a/sys/i386/i386/exception.s b/sys/i386/i386/exception.s
index e1dcc09..d618cb8 100644
--- a/sys/i386/i386/exception.s
+++ b/sys/i386/i386/exception.s
@@ -81,34 +81,16 @@
 			.type __CONCAT(X,name),@function; __CONCAT(X,name):
 #define	TRAP(a)		pushl $(a) ; jmp alltraps
 
-#ifdef BDE_DEBUGGER
-#define	BDBTRAP(name) \
-	ss ; \
-	cmpb	$0,_bdb_exists ; \
-	je	1f ; \
-	testb	$SEL_RPL_MASK,4(%esp) ; \
-	jne	1f ; \
-	ss ; \
-	.globl	__CONCAT(__CONCAT(bdb_,name),_ljmp); \
-__CONCAT(__CONCAT(bdb_,name),_ljmp): \
-	ljmp	$0,$0 ; \
-1:
-#else
-#define BDBTRAP(name)
-#endif
-
 MCOUNT_LABEL(user)
 MCOUNT_LABEL(btrap)
 
 IDTVEC(div)
 	pushl $0; TRAP(T_DIVIDE)
 IDTVEC(dbg)
-	BDBTRAP(dbg)
 	pushl $0; TRAP(T_TRCTRAP)
 IDTVEC(nmi)
 	pushl $0; TRAP(T_NMI)
 IDTVEC(bpt)
-	BDBTRAP(bpt)
 	pushl $0; TRAP(T_BPTFLT)
 IDTVEC(ofl)
 	pushl $0; TRAP(T_OFLOW)
diff --git a/sys/i386/i386/locore.s b/sys/i386/i386/locore.s
index f6ebc88..7623f10 100644
--- a/sys/i386/i386/locore.s
+++ b/sys/i386/i386/locore.s
@@ -155,11 +155,6 @@ vm86phystk:	.long	0		/* PA of vm86/bios stack */
 vm86paddr:	.long	0		/* address of vm86 region */
 vm86pa:		.long	0		/* phys addr of vm86 region */
 
-#ifdef BDE_DEBUGGER
-	.globl	_bdb_exists		/* flag to indicate BDE debugger is present */
-_bdb_exists:	.long	0
-#endif
-
 #ifdef PC98
 	.globl	pc98_system_parameter
 pc98_system_parameter:
@@ -232,16 +227,6 @@ NON_GPROF_ENTRY(btext)
 	rep
 	movsb
 #else	/* IBM-PC */
-#ifdef BDE_DEBUGGER
-#ifdef BIOS_STEALS_3K
-	cmpl	$0x0375c339,0x95504
-#else
-	cmpl	$0x0375c339,0x96104	/* XXX - debugger signature */
-#endif
-	jne	1f
-	movb	$1,R(_bdb_exists)
-1:
-#endif
 /* Tell the bios to warmboot next time */
 	movw	$0x1234,0x472
 #endif	/* PC98 */
@@ -314,8 +299,8 @@ NON_GPROF_ENTRY(btext)
  *
  * XXX the gdt and idt are still somewhere in the boot program.  We
  * depend on the convention that the boot program is below 1MB and we
- * are above 1MB to keep the gdt and idt  away from the bss and page
- * tables.  The idt is only used if BDE_DEBUGGER is enabled.
+ * are above 1MB to keep the gdt and idt away from the bss and page
+ * tables.
  */
 	movl	$R(end),%ecx
 	movl	$R(edata),%edi
@@ -337,14 +322,6 @@ NON_GPROF_ENTRY(btext)
 	movl	%eax, %cr4
 1:
 
-#ifdef BDE_DEBUGGER
-/*
- * Adjust as much as possible for paging before enabling paging so that the
- * adjustments can be traced.
- */
-	call	bdb_prepare_paging
-#endif
-
 /* Now enable paging */
 	movl	R(IdlePTD), %eax
 	movl	%eax,%cr3		/* load ptd addr into mmu */
@@ -352,15 +329,6 @@ NON_GPROF_ENTRY(btext)
 	orl	$CR0_PE|CR0_PG,%eax	/* enable paging */
 	movl	%eax,%cr0		/* and let's page NOW! */
 
-#ifdef BDE_DEBUGGER
-/*
- * Complete the adjustments for paging so that we can keep tracing through
- * initi386() after the low (physical) addresses for the gdt and idt become
- * invalid.
- */
-	call	bdb_commit_paging
-#endif
-
 	pushl	$begin			/* jump to high virtualized address */
 	ret
 
@@ -819,11 +787,6 @@ no_kernend:
 
 /* Map read-only from zero to the end of the kernel text section */
 	xorl	%eax, %eax
-#ifdef BDE_DEBUGGER
-/* If the debugger is present, actually map everything read-write. */
-	cmpl	$0,R(_bdb_exists)
-	jne	map_read_write
-#endif
 	xorl	%edx,%edx
 	movl	$R(etext),%ecx
 	addl	$PAGE_MASK,%ecx
@@ -834,7 +797,6 @@ no_kernend:
 	movl	$R(etext),%eax
 	addl	$PAGE_MASK, %eax
 	andl	$~PAGE_MASK, %eax
-map_read_write:
 	movl	$PG_RW,%edx
 	movl	R(KERNend),%ecx
 	subl	%eax,%ecx
@@ -928,83 +890,3 @@ map_read_write:
 	fillkpt(R(IdlePTD), $PG_RW)
 
 	ret
-
-#ifdef BDE_DEBUGGER
-bdb_prepare_paging:
-	cmpl	$0,R(_bdb_exists)
-	je	bdb_prepare_paging_exit
-
-	subl	$6,%esp
-
-	/*
-	 * Copy and convert debugger entries from the bootstrap gdt and idt
-	 * to the kernel gdt and idt.  Everything is still in low memory.
-	 * Tracing continues to work after paging is enabled because the
-	 * low memory addresses remain valid until everything is relocated.
-	 * However, tracing through the setidt() that initializes the trace
-	 * trap will crash.
-	 */
-	sgdt	(%esp)
-	movl	2(%esp),%esi		/* base address of bootstrap gdt */
-	movl	$R(_gdt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel gdt */
-	movl	$8*18/4,%ecx
-	cld
-	rep				/* copy gdt */
-	movsl
-	movl	$R(_gdt),-8+2(%edi)	/* adjust gdt self-ptr */
-	movb	$0x92,-8+5(%edi)
-	lgdt	(%esp)
-
-	sidt	(%esp)
-	movl	2(%esp),%esi		/* base address of current idt */
-	movl	8+4(%esi),%eax		/* convert dbg descriptor to ... */
-	movw	8(%esi),%ax
-	movl	%eax,R(bdb_dbg_ljmp+1)	/* ... immediate offset ... */
-	movl	8+2(%esi),%eax
-	movw	%ax,R(bdb_dbg_ljmp+5)	/* ... and selector for ljmp */
-	movl	24+4(%esi),%eax		/* same for bpt descriptor */
-	movw	24(%esi),%ax
-	movl	%eax,R(bdb_bpt_ljmp+1)
-	movl	24+2(%esi),%eax
-	movw	%ax,R(bdb_bpt_ljmp+5)
-	movl	R(_idt),%edi
-	movl	%edi,2(%esp)		/* prepare to load kernel idt */
-	movl	$8*4/4,%ecx
-	cld
-	rep				/* copy idt */
-	movsl
-	lidt	(%esp)
-
-	addl	$6,%esp
-
-bdb_prepare_paging_exit:
-	ret
-
-/* Relocate debugger gdt entries and gdt and idt pointers. */
-bdb_commit_paging:
-	cmpl	$0,_bdb_exists
-	je	bdb_commit_paging_exit
-
-	movl	$gdt+8*9,%eax		/* adjust slots 9-17 */
-	movl	$9,%ecx
-reloc_gdt:
-	movb	$KERNBASE>>24,7(%eax)	/* top byte of base addresses, was 0, */
-	addl	$8,%eax			/* now KERNBASE>>24 */
-	loop	reloc_gdt
-
-	subl	$6,%esp
-	sgdt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lgdt	(%esp)
-	sidt	(%esp)
-	addl	$KERNBASE,2(%esp)
-	lidt	(%esp)
-	addl	$6,%esp
-
-	int	$3
-
-bdb_commit_paging_exit:
-	ret
-
-#endif /* BDE_DEBUGGER */
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index 45d295a..55133a7 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -1937,14 +1937,8 @@ init386(first)
 	gdt_segs[GPRIV_SEL].ssd_base = (int) pc;
 	gdt_segs[GPROC0_SEL].ssd_base = (int) &pc->pc_common_tss;
 
-	for (x = 0; x < NGDT; x++) {
-#ifdef BDE_DEBUGGER
-		/* avoid overwriting db entries with APM ones */
-		if (x >= GAPMCODE32_SEL && x <= GAPMDATA_SEL)
-			continue;
-#endif
+	for (x = 0; x < NGDT; x++)
 		ssdtosd(&gdt_segs[x], &gdt[x].sd);
-	}
 
 	r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
 	r_gdt.rd_base =  (int) gdt;
diff --git a/sys/i386/include/segments.h b/sys/i386/include/segments.h
index bcbf2fb..95117da 100644
--- a/sys/i386/include/segments.h
+++ b/sys/i386/include/segments.h
@@ -199,11 +199,7 @@ struct region_descriptor {
 #define GBIOSUTIL_SEL	13	/* BIOS interface (Utility) */
 #define GBIOSARGS_SEL	14	/* BIOS interface (Arguments) */
 
-#ifdef BDE_DEBUGGER
-#define	NGDT		18	/* some of 11-17 are reserved for debugger */
-#else
 #define NGDT 		15
-#endif
 
 /*
  * Entries in the Local Descriptor Table (LDT)
diff --git a/sys/pc98/i386/machdep.c b/sys/pc98/i386/machdep.c
index f718a12..4aa649b 100644
--- a/sys/pc98/i386/machdep.c
+++ b/sys/pc98/i386/machdep.c
@@ -2016,14 +2016,8 @@ init386(first)
 	gdt_segs[GPRIV_SEL].ssd_base = (int) pc;
 	gdt_segs[GPROC0_SEL].ssd_base = (int) &pc->pc_common_tss;
 
-	for (x = 0; x < NGDT; x++) {
-#ifdef BDE_DEBUGGER
-		/* avoid overwriting db entries with APM ones */
-		if (x >= GAPMCODE32_SEL && x <= GAPMDATA_SEL)
-			continue;
-#endif
+	for (x = 0; x < NGDT; x++)
 		ssdtosd(&gdt_segs[x], &gdt[x].sd);
-	}
 
 	r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
 	r_gdt.rd_base =  (int) gdt;
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c
index f718a12..4aa649b 100644
--- a/sys/pc98/pc98/machdep.c
+++ b/sys/pc98/pc98/machdep.c
@@ -2016,14 +2016,8 @@ init386(first)
 	gdt_segs[GPRIV_SEL].ssd_base = (int) pc;
 	gdt_segs[GPROC0_SEL].ssd_base = (int) &pc->pc_common_tss;
 
-	for (x = 0; x < NGDT; x++) {
-#ifdef BDE_DEBUGGER
-		/* avoid overwriting db entries with APM ones */
-		if (x >= GAPMCODE32_SEL && x <= GAPMDATA_SEL)
-			continue;
-#endif
+	for (x = 0; x < NGDT; x++)
 		ssdtosd(&gdt_segs[x], &gdt[x].sd);
-	}
 
 	r_gdt.rd_limit = NGDT * sizeof(gdt[0]) - 1;
 	r_gdt.rd_base =  (int) gdt;