1 files changed, 0 insertions, 92 deletions
diff --git a/gpxe/src/arch/i386/interface/pcbios/biosint.c b/gpxe/src/arch/i386/interface/pcbios/biosint.c
deleted file mode 100644
index a193defa..00000000
--- a/gpxe/src/arch/i386/interface/pcbios/biosint.c
+++ /dev/null
@@ -1,92 +0,0 @@
-#include <errno.h>
-#include <realmode.h>
-#include <biosint.h>
-
-/**
- * @file BIOS interrupts
- *
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-/**
- * Hook INT vector
- *
- * @v interrupt		INT number
- * @v handler		Offset within .text16 to interrupt handler
- * @v chain_vector	Vector for chaining to previous handler
- *
- * Hooks in an i386 INT handler.  The handler itself must reside
- * within the .text16 segment.  @c chain_vector will be filled in with
- * the address of the previously-installed handler for this interrupt;
- * the handler should probably exit by ljmping via this vector.
- */
-void hook_bios_interrupt ( unsigned int interrupt, unsigned int handler,
-			   struct segoff *chain_vector ) {
-	struct segoff vector = {
-		.segment = rm_cs,
-		.offset = handler,
-	};
-
-	DBG ( "Hooking INT %#02x to %04x:%04x\n",
-	      interrupt, rm_cs, handler );
-
-	if ( ( chain_vector->segment != 0 ) ||
-	     ( chain_vector->offset != 0 ) ) {
-		/* Already hooked; do nothing */
-		DBG ( "...already hooked\n" );
-		return;
-	}
-
-	copy_from_real ( chain_vector, 0, ( interrupt * 4 ),
-			 sizeof ( *chain_vector ) );
-	DBG ( "...chaining to %04x:%04x\n",
-	      chain_vector->segment, chain_vector->offset );
-	if ( DBG_LOG ) {
-		char code[64];
-		copy_from_real ( code, chain_vector->segment,
-				 chain_vector->offset, sizeof ( code ) );
-		DBG_HDA ( *chain_vector, code, sizeof ( code ) );
-	}
-
-	copy_to_real ( 0, ( interrupt * 4 ), &vector, sizeof ( vector ) );
-	hooked_bios_interrupts++;
-}
-
-/**
- * Unhook INT vector
- *
- * @v interrupt		INT number
- * @v handler		Offset within .text16 to interrupt handler
- * @v chain_vector	Vector containing address of previous handler
- *
- * Unhooks an i386 interrupt handler hooked by hook_i386_vector().
- * Note that this operation may fail, if some external code has hooked
- * the vector since we hooked in our handler.  If it fails, it means
- * that it is not possible to unhook our handler, and we must leave it
- * (and its chaining vector) resident in memory.
- */
-int unhook_bios_interrupt ( unsigned int interrupt, unsigned int handler,
-			    struct segoff *chain_vector ) {
-	struct segoff vector;
-
-	DBG ( "Unhooking INT %#02x from %04x:%04x\n",
-	      interrupt, rm_cs, handler );
-
-	copy_from_real ( &vector, 0, ( interrupt * 4 ), sizeof ( vector ) );
-	if ( ( vector.segment != rm_cs ) || ( vector.offset != handler ) ) {
-		DBG ( "...cannot unhook; vector points to %04x:%04x\n",
-		      vector.segment, vector.offset );
-		return -EBUSY;
-	}
-
-	DBG ( "...restoring to %04x:%04x\n",
-	      chain_vector->segment, chain_vector->offset );
-	copy_to_real ( 0, ( interrupt * 4 ), chain_vector,
-		       sizeof ( *chain_vector ) );
-
-	chain_vector->segment = 0;
-	chain_vector->offset = 0;
-	hooked_bios_interrupts--;
-	return 0;
-}