gpxe: delete long since obsolete snapshot of gPXE

gPXE has been deprecated in favor of iPXE for many, many years now.
It is much better than users get it directly from the iPXE project,
since we should no longer need any special modifications for Syslinux
use.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 0 insertions, 149 deletions

diff --git a/gpxe/src/arch/i386/core/gdbmach.c b/gpxe/src/arch/i386/core/gdbmach.c
deleted file mode 100644
index 97827ecb..00000000
--- a/gpxe/src/arch/i386/core/gdbmach.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/*
- * Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <stddef.h>
-#include <stdio.h>
-#include <assert.h>
-#include <gpxe/uaccess.h>
-#include <gpxe/gdbstub.h>
-#include <gdbmach.h>
-
-/** @file
- *
- * GDB architecture-specific bits for i386
- *
- */
-
-enum {
-	DR7_CLEAR = 0x00000400,    /* disable hardware breakpoints */
-	DR6_CLEAR = 0xffff0ff0,    /* clear breakpoint status */
-};
-
-/** Hardware breakpoint, fields stored in x86 bit pattern form */
-struct hwbp {
-	int type;           /* type (1=write watchpoint, 3=access watchpoint) */
-	unsigned long addr; /* linear address */
-	size_t len;         /* length (0=1-byte, 1=2-byte, 3=4-byte) */
-	int enabled;
-};
-
-static struct hwbp hwbps [ 4 ];
-static gdbreg_t dr7 = DR7_CLEAR;
-
-static struct hwbp *gdbmach_find_hwbp ( int type, unsigned long addr, size_t len ) {
-	struct hwbp *available = NULL;
-	unsigned int i;
-	for ( i = 0; i < sizeof hwbps / sizeof hwbps [ 0 ]; i++ ) {
-		if ( hwbps [ i ].type == type && hwbps [ i ].addr == addr && hwbps [ i ].len == len ) {
-			return &hwbps [ i ];
-		}
-		if ( !hwbps [ i ].enabled ) {
-			available = &hwbps [ i ];
-		}
-	}
-	return available;
-}
-
-static void gdbmach_commit_hwbp ( struct hwbp *bp ) {
-	unsigned int regnum = bp - hwbps;
-
-	/* Set breakpoint address */
-	assert ( regnum < ( sizeof hwbps / sizeof hwbps [ 0 ] ) );
-	switch ( regnum ) {
-		case 0:
-			__asm__ __volatile__ ( "movl %0, %%dr0\n" : : "r" ( bp->addr ) );
-			break;
-		case 1:
-			__asm__ __volatile__ ( "movl %0, %%dr1\n" : : "r" ( bp->addr ) );
-			break;
-		case 2:
-			__asm__ __volatile__ ( "movl %0, %%dr2\n" : : "r" ( bp->addr ) );
-			break;
-		case 3:
-			__asm__ __volatile__ ( "movl %0, %%dr3\n" : : "r" ( bp->addr ) );
-			break;
-	}
-
-	/* Set type */
-	dr7 &= ~( 0x3 << ( 16 + 4 * regnum ) );
-	dr7 |= bp->type << ( 16 + 4 * regnum );
-
-	/* Set length */
-	dr7 &= ~( 0x3 << ( 18 + 4 * regnum ) );
-	dr7 |= bp->len << ( 18 + 4 * regnum );
-
-	/* Set/clear local enable bit */
-	dr7 &= ~( 0x3 << 2 * regnum );
- 	dr7 |= bp->enabled << 2 * regnum;
-}
-
-int gdbmach_set_breakpoint ( int type, unsigned long addr, size_t len, int enable ) {
-	struct hwbp *bp;
-	
-	/* Check and convert breakpoint type to x86 type */
-	switch ( type ) {
-		case GDBMACH_WATCH:
-			type = 0x1;
-			break;
-		case GDBMACH_AWATCH:
-			type = 0x3;
-			break;
-		default:
-			return 0; /* unsupported breakpoint type */
-	}
-
-	/* Only lengths 1, 2, and 4 are supported */
-	if ( len != 2 && len != 4 ) {
-		len = 1;
-	}
-	len--; /* convert to x86 breakpoint length bit pattern */
-
-	/* Calculate linear address by adding segment base */
-	addr += virt_offset;
-
-	/* Set up the breakpoint */
-	bp = gdbmach_find_hwbp ( type, addr, len );
-	if ( !bp ) {
-		return 0; /* ran out of hardware breakpoints */
-	}
-	bp->type = type;
-	bp->addr = addr;
-	bp->len = len;
-	bp->enabled = enable;
-	gdbmach_commit_hwbp ( bp );
-	return 1;
-}
-
-static void gdbmach_disable_hwbps ( void ) {
-	/* Store and clear hardware breakpoints */
-	__asm__ __volatile__ ( "movl %0, %%dr7\n" : : "r" ( DR7_CLEAR ) );
-}
-
-static void gdbmach_enable_hwbps ( void ) {
-	/* Clear breakpoint status register */
-	__asm__ __volatile__ ( "movl %0, %%dr6\n" : : "r" ( DR6_CLEAR ) );
-
-	/* Restore hardware breakpoints */
-	__asm__ __volatile__ ( "movl %0, %%dr7\n" : : "r" ( dr7 ) );
-}
-
-__asmcall void gdbmach_handler ( int signo, gdbreg_t *regs ) {
-	gdbmach_disable_hwbps();
-	gdbstub_handler ( signo, regs );
-	gdbmach_enable_hwbps();
-}