[int13] Improve debugging messages

diff --git a/src/arch/i386/interface/pcbios/int13.c b/src/arch/i386/interface/pcbios/int13.c
index 2e9de5cbf1976141498585b05c5058390d1fac95..04f9cdf5f2efbad292f23689fcaee05f602dbdf2 100644 (file)
--- a/src/arch/i386/interface/pcbios/int13.c
+++ b/src/arch/i386/interface/pcbios/int13.c
@@ -98,6 +98,7 @@ static int int13_rw_sectors ( struct int13_drive *drive,
        unsigned long lba;
        unsigned int count;
        userptr_t buffer;
+       int rc;
 
        /* Validate blocksize */
        if ( blockdev->blksize != INT13_BLKSIZE ) {
@@ -122,8 +123,10 @@ static int int13_rw_sectors ( struct int13_drive *drive,
              head, sector, lba, ix86->segs.es, ix86->regs.bx, count );
 
        /* Read from / write to block device */
-       if ( io ( blockdev, lba, count, buffer ) != 0 )
+       if ( ( rc = io ( blockdev, lba, count, buffer ) ) != 0 ) {
+               DBG ( "INT 13 failed: %s\n", strerror ( rc ) );
                return -INT13_STATUS_READ_ERROR;
+       }
 
        return 0;
 }
@@ -248,6 +251,7 @@ static int int13_extended_rw ( struct int13_drive *drive,
        uint64_t lba;
        unsigned long count;
        userptr_t buffer;
+       int rc;
 
        /* Read parameters from disk address structure */
        copy_from_real ( &addr, ix86->segs.ds, ix86->regs.si, sizeof ( addr ));
@@ -259,8 +263,10 @@ static int int13_extended_rw ( struct int13_drive *drive,
              addr.buffer.segment, addr.buffer.offset, count );
        
        /* Read from / write to block device */
-       if ( io ( blockdev, lba, count, buffer ) != 0 )
+       if ( ( rc = io ( blockdev, lba, count, buffer ) ) != 0 ) {
+               DBG ( "INT 13 failed: %s\n", strerror ( rc ) );
                return -INT13_STATUS_READ_ERROR;
+       }
 
        return 0;
 }
@@ -387,7 +393,7 @@ static __asmcall void int13 ( struct i386_all_regs *ix86 ) {
                /* Negative status indicates an error */
                if ( status < 0 ) {
                        status = -status;
-                       DBG ( "INT13 failed with status %x\n", status );
+                       DBG ( "INT 13 returning failure status %x\n", status );
                } else {
                        ix86->flags &= ~CF;
                }
@@ -652,7 +658,8 @@ int int13_boot ( unsigned int drive ) {
 
        /* Jump to boot sector */
        if ( ( rc = call_bootsector ( 0x0, 0x7c00, drive ) ) != 0 ) {
-               DBG ( "INT 13 drive %02x boot returned\n", drive );
+               DBG ( "INT 13 drive %02x boot returned: %s\n",
+                     drive, strerror ( rc ) );
                return rc;
        }