source: patches/grub-0.97-disk_geometry-1.patch@ 20fd9b6

configure

@@ -3485 +3485 @@
 echo "$as_me:$LINENO: result: $size_flag" >&5
 echo "${ECHO_T}$size_flag" >&6
     if test "x$size_flag" = xyes; then
-      STAGE2_CFLAGS="-Os"
+      STAGE2_CFLAGS="-Os -fno-strict-aliasing"
     else
-      STAGE2_CFLAGS="-O2 -fno-strength-reduce -fno-unroll-loops"
+      STAGE2_CFLAGS="-O2 -fno-strict-aliasing -fno-strength-reduce -fno-unroll-loops"
     fi
     # OpenBSD has a GCC extension for protecting applications from
     # stack smashing attacks, but GRUB doesn't want this feature.

configure.ac

@@ -93 +93 @@
       CFLAGS=$saved_CFLAGS
     ])
     if test "x$size_flag" = xyes; then
-      STAGE2_CFLAGS="-Os"
+      STAGE2_CFLAGS="-Os -fno-strict-aliasing"
     else
-      STAGE2_CFLAGS="-O2 -fno-strength-reduce -fno-unroll-loops"
+      STAGE2_CFLAGS="-O2 -fno-strict-aliasing -fno-strength-reduce -fno-unroll-loops"
     fi
     # OpenBSD has a GCC extension for protecting applications from
     # stack smashing attacks, but GRUB doesn't want this feature.

lib/device.c

@@ -131 +131 @@
 #include <shared.h>
 #include <device.h>
 
+#if defined(__linux__)
+/* The 2.6 kernel has removed all of the geometry handling for IDE drives
+ * that did fixups for LBA, etc.  This means that the geometry we get
+ * with the ioctl has a good chance of being wrong.  So, we get to 
+ * also know about partition tables and try to read what the geometry
+ * is there. *grumble*   Very closely based on code from cfdisk
+ */
+static void get_kernel_geometry(int fd, long long *cyl, int *heads, int *sectors) {
+    struct hd_geometry hdg;
+    
+    if (ioctl (fd, HDIO_GETGEO, &hdg))
+        return;
+
+    *cyl = hdg.cylinders;
+    *heads = hdg.heads;
+    *sectors = hdg.sectors;
+}
+
+struct partition {
+        unsigned char boot_ind;         /* 0x80 - active */
+        unsigned char head;             /* starting head */
+        unsigned char sector;           /* starting sector */
+        unsigned char cyl;              /* starting cylinder */
+        unsigned char sys_ind;          /* What partition type */
+        unsigned char end_head;         /* end head */
+        unsigned char end_sector;       /* end sector */
+        unsigned char end_cyl;          /* end cylinder */
+        unsigned char start4[4];        /* starting sector counting from 0 */
+        unsigned char size4[4];         /* nr of sectors in partition */
+};
+
+#define ALIGNMENT 2
+typedef union {
+    struct {
+        unsigned char align[ALIGNMENT];
+        unsigned char b[SECTOR_SIZE];
+    } c;
+    struct {
+        unsigned char align[ALIGNMENT];
+        unsigned char buffer[0x1BE];
+        struct partition part[4];
+        unsigned char magicflag[2];
+    } p;
+} partition_table;
+
+#define PART_TABLE_FLAG0 0x55
+#define PART_TABLE_FLAG1 0xAA
+
+static void
+get_partition_table_geometry(partition_table *bufp, long long *cyl, int *heads, 
+                             int *sectors) {
+    struct partition *p;
+    int i,h,s,hh,ss;
+    int first = 1;
+    int bad = 0;
+
+    if (bufp->p.magicflag[0] != PART_TABLE_FLAG0 ||
+        bufp->p.magicflag[1] != PART_TABLE_FLAG1) {
+            /* Matthew Wilcox: slightly friendlier version of
+               fatal(_("Bad signature on partition table"), 3);
+            */
+            fprintf(stderr, "Unknown partition table signature\n");
+            return;
+    }
+
+    hh = ss = 0;
+    for (i=0; i<4; i++) {
+        p = &(bufp->p.part[i]);
+        if (p->sys_ind != 0) {
+            h = p->end_head + 1;
+            s = (p->end_sector & 077);
+            if (first) {
+                hh = h;
+                ss = s;
+                first = 0;
+            } else if (hh != h || ss != s)
+                bad = 1;
+        }
+    }
+
+    if (!first && !bad) {
+        *heads = hh;
+        *sectors = ss;
+    }
+}
+
+static long long my_lseek (unsigned int fd, long long offset, 
+                           unsigned int origin)
+{
+#if defined(__linux__) && (!defined(__GLIBC__) || \
+        ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1))))
+  /* Maybe libc doesn't have large file support.  */
+  loff_t offset, result;
+  static int _llseek (uint filedes, ulong hi, ulong lo,
+                      loff_t *res, uint wh);
+  _syscall5 (int, _llseek, uint, filedes, ulong, hi, ulong, lo,
+             loff_t *, res, uint, wh);
+  
+  if (_llseek (fd, offset >> 32, offset & 0xffffffff, &result, SEEK_SET) < 0)
+    return (long long) -1;
+  return result;
+#else
+  return lseek(fd, offset, SEEK_SET);
+#endif
+}
+
+static void get_linux_geometry (int fd, struct geometry *geom) {
+    long long kern_cyl = 0; int kern_head = 0, kern_sectors = 0;
+    long long pt_cyl = 0; int pt_head = 0, pt_sectors = 0;
+    partition_table bufp;
+    char *buff, *buf_unaligned;
+
+    buf_unaligned = malloc(sizeof(partition_table) + 4095);
+    buff = (char *) (((unsigned long)buf_unaligned + 4096 - 1) &
+                     (~(4096-1)));
+
+    get_kernel_geometry(fd, &kern_cyl, &kern_head, &kern_sectors);
+
+    if (my_lseek (fd, 0*SECTOR_SIZE, SEEK_SET) < 0) {
+        fprintf(stderr, "Unable to seek");
+    }
+
+    if (read(fd, buff, SECTOR_SIZE) == SECTOR_SIZE) {
+        memcpy(bufp.c.b, buff, SECTOR_SIZE);
+        get_partition_table_geometry(&bufp, &pt_cyl, &pt_head, &pt_sectors);
+    } else {
+        fprintf(stderr, "Unable to read partition table: %s\n", strerror(errno));
+    }
+
+    if (pt_head && pt_sectors) {
+        int cyl_size;
+
+        geom->heads = pt_head;
+        geom->sectors = pt_sectors;
+        cyl_size = pt_head * pt_sectors;
+        geom->cylinders = geom->total_sectors/cyl_size;
+    } else {
+        geom->heads = kern_head;
+        geom->sectors = kern_sectors;
+        geom->cylinders = kern_cyl;
+    }
+
+    return;
+}
+#endif
+
 /* Get the geometry of a drive DRIVE.  */
 void
 get_drive_geometry (struct geometry *geom, char **map, int drive)
@@ -151 +297 @@
 #if defined(__linux__)
   /* Linux */
   {
-    struct hd_geometry hdg;
     unsigned long nr;
-    
-    if (ioctl (fd, HDIO_GETGEO, &hdg))
-      goto fail;
 
     if (ioctl (fd, BLKGETSIZE, &nr))
       goto fail;
     
     /* Got the geometry, so save it. */
-    geom->cylinders = hdg.cylinders;
-    geom->heads = hdg.heads;
-    geom->sectors = hdg.sectors;
     geom->total_sectors = nr;
-    
+    get_linux_geometry(fd, geom);
+    if (!geom->heads && !geom->cylinders && !geom->sectors)
+        goto fail;
     goto success;
   }
 
@@ -844 +985 @@
 {
   char dev[PATH_MAX];   /* XXX */
   int fd;
+  off_t offset = (off_t) sector * (off_t) SECTOR_SIZE;
   
   if ((partition & 0x00FF00) != 0x00FF00)
     {
@@ -870 +1012 @@
       errnum = ERR_NO_PART;
       return 0;
     }
-  
-#if defined(__linux__) && (!defined(__GLIBC__) || \
-        ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1))))
-  /* Maybe libc doesn't have large file support.  */
-  {
-    loff_t offset, result;
-    static int _llseek (uint filedes, ulong hi, ulong lo,
-                        loff_t *res, uint wh);
-    _syscall5 (int, _llseek, uint, filedes, ulong, hi, ulong, lo,
-               loff_t *, res, uint, wh);
 
-    offset = (loff_t) sector * (loff_t) SECTOR_SIZE;
-    if (_llseek (fd, offset >> 32, offset & 0xffffffff, &result, SEEK_SET))
-      {
-        errnum = ERR_DEV_VALUES;
-        return 0;
-      }
-  }
-#else
-  {
-    off_t offset = (off_t) sector * (off_t) SECTOR_SIZE;
 
-    if (lseek (fd, offset, SEEK_SET) != offset)
-      {
-        errnum = ERR_DEV_VALUES;
-        return 0;
-      }
-  }
-#endif
+  if (my_lseek(fd, offset, SEEK_SET) != offset)
+    {
+      errnum = ERR_DEV_VALUES;
+      return 0;
+    }
   
   if (write (fd, buf, size * SECTOR_SIZE) != (size * SECTOR_SIZE))
     {

stage2/Makefile.am

@@ -24 +24 @@
         -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 -DFSYS_FAT=1 -DFSYS_FFS=1 \
         -DFSYS_ISO9660=1 -DFSYS_JFS=1 -DFSYS_MINIX=1 -DFSYS_REISERFS=1 \
         -DFSYS_UFS2=1 -DFSYS_VSTAFS=1 -DFSYS_XFS=1 \
-        -DUSE_MD5_PASSWORDS=1 -DSUPPORT_SERIAL=1 -DSUPPORT_HERCULES=1
+        -DUSE_MD5_PASSWORDS=1 -DSUPPORT_SERIAL=1 -DSUPPORT_HERCULES=1 \
+        -fno-strict-aliasing
 
 # Stage 2 and Stage 1.5's.
 pkglibdir = $(libdir)/$(PACKAGE)/$(host_cpu)-$(host_vendor)

stage2/boot.c

@@ -55 +55 @@
   pu;
   /* presuming that MULTIBOOT_SEARCH is large enough to encompass an
      executable header */
-  unsigned char buffer[MULTIBOOT_SEARCH];
+  char buffer[MULTIBOOT_SEARCH];
 
   /* sets the header pointer to point to the beginning of the
      buffer by default */
@@ -98 +98 @@
   /* ELF loading supported if multiboot, FreeBSD and NetBSD.  */
   if ((type == KERNEL_TYPE_MULTIBOOT
        || pu.elf->e_ident[EI_OSABI] == ELFOSABI_FREEBSD
-       || grub_strcmp (pu.elf->e_ident + EI_BRAND, "FreeBSD") == 0
+       || grub_strcmp ((char *) pu.elf->e_ident + EI_BRAND, "FreeBSD") == 0
        || suggested_type == KERNEL_TYPE_NETBSD)
       && len > sizeof (Elf32_Ehdr)
       && BOOTABLE_I386_ELF ((*((Elf32_Ehdr *) buffer))))
@@ -824 +824 @@
     moveto = (mbi.mem_upper + 0x400) << 10;
   
   moveto = (moveto - len) & 0xfffff000;
+#if 0
   max_addr = (lh->header == LINUX_MAGIC_SIGNATURE && lh->version >= 0x0203
               ? lh->initrd_addr_max : LINUX_INITRD_MAX_ADDRESS);
+#else
+  max_addr = LINUX_INITRD_MAX_ADDRESS;
+#endif
   if (moveto + len >= max_addr)
     moveto = (max_addr - len) & 0xfffff000;
   

stage2/disk_io.c

@@ -127 +127 @@
 int filepos;
 int filemax;
 
-static inline unsigned long
-log2 (unsigned long word)
+#define log2(n) ffz(~(n))
+
+/* include/asm-i386/bitops.h */
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static __inline__ unsigned long
+ffz (unsigned long word)
 {
-  asm volatile ("bsfl %1,%0"
-                : "=r" (word)
-                : "r" (word));
+  __asm__ ("bsfl %1,%0"
+:          "=r" (word)
+:          "r" (~word));
   return word;
 }
 

stage2/freebsd.h

@@ -78 +78 @@
 struct bootinfo
   {
     unsigned int bi_version;
-    unsigned char *bi_kernelname;
+    char *bi_kernelname;
     struct nfs_diskless *bi_nfs_diskless;
     /* End of fields that are always present. */
 #define bi_endcommon            bi_n_bios_used

stage2/fsys_fat.c

@@ -54 +54 @@
 
 #define FAT_CACHE_SIZE 2048
 
+#define log2(n) ffz(~(n))
+
+/* include/asm-i386/bitops.h */
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
 static __inline__ unsigned long
-log2 (unsigned long word)
+ffz (unsigned long word)
 {
   __asm__ ("bsfl %1,%0"
-           : "=r" (word)
-           : "r" (word));
+:          "=r" (word)
+:          "r" (~word));
   return word;
 }
 

stage2/fsys_iso9660.c

@@ -55 +55 @@
 #define RRCONT_BUF      ((unsigned char *)(FSYS_BUF + 6144))
 #define NAME_BUF        ((unsigned char *)(FSYS_BUF + 8192))
 
+#define log2(n) ffz(~(n))
 
-static inline unsigned long
-log2 (unsigned long word)
+/* include/asm-i386/bitops.h */
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+static __inline__ unsigned long
+ffz (unsigned long word)
 {
-  asm volatile ("bsfl %1,%0"
-                :          "=r" (word)
-                :          "r" (word));
+  __asm__ ("bsfl %1,%0"
+:          "=r" (word)
+:          "r" (~word));
   return word;
 }
 
@@ -120 +126 @@
         break;
       /* check ISO_VD_PRIMARY and ISO_STANDARD_ID */
       if (PRIMDESC->type.l == ISO_VD_PRIMARY
-          && !memcmp(PRIMDESC->id, ISO_STANDARD_ID, sizeof(PRIMDESC->id)))
+          && !memcmp((char *) PRIMDESC->id, ISO_STANDARD_ID, sizeof(PRIMDESC->id)))
         {
           ISO_SUPER->vol_sector = sector;
           INODE->file_start = 0;
@@ -175 +181 @@
           for (; idr->length.l > 0;
                idr = (struct iso_directory_record *)((char *)idr + idr->length.l) )
             {
-              const char *name = idr->name;
+              const u_int8_t *name = idr->name;
               unsigned int name_len = idr->name_len.l;
 
               file_type = (idr->flags.l & 2) ? ISO_DIRECTORY : ISO_REGULAR;
@@ -198 +204 @@
               rr_len = (idr->length.l - idr->name_len.l
                         - sizeof(struct iso_directory_record)
                         + sizeof(idr->name));
-              rr_ptr.ptr = ((unsigned char *)idr + idr->name_len.l
+              rr_ptr.ptr = ((char *)idr + idr->name_len.l
                             + sizeof(struct iso_directory_record)
                             - sizeof(idr->name));
               if (rr_ptr.i & 1)
@@ -331 +337 @@
                           memcpy(NAME_BUF, name, name_len);
                           name = NAME_BUF;
                         }
-                      rr_ptr.ptr = RRCONT_BUF + ce_ptr->u.ce.offset.l;
+                      rr_ptr.ptr = (char *) RRCONT_BUF + ce_ptr->u.ce.offset.l;
                       rr_len = ce_ptr->u.ce.size.l;
-                      if (!iso9660_devread(ce_ptr->u.ce.extent.l, 0, ISO_SECTOR_SIZE, RRCONT_BUF))
+                      if (!iso9660_devread(ce_ptr->u.ce.extent.l, 0, ISO_SECTOR_SIZE, (char *) RRCONT_BUF))
                         {
                           errnum = 0;   /* this is not fatal. */
                           break;
@@ -344 +350 @@
 
               filemax = MAXINT;
               if (name_len >= pathlen
-                  && !memcmp(name, dirname, pathlen))
+                  && !memcmp((char *) name, dirname, pathlen))
                 {
                   if (dirname[pathlen] == '/' || !print_possibilities)
                     {
@@ -381 +387 @@
                         print_possibilities = -print_possibilities;
                       memcpy(NAME_BUF, name, name_len);
                       NAME_BUF[name_len] = '\0';
-                      print_a_completion (NAME_BUF);
+                      print_a_completion ((char *) NAME_BUF);
 #endif
                     }
                 }

stage2/fsys_reiserfs.c

@@ -365 +365 @@
 #define JOURNAL_START    ((__u32 *) (INFO + 1))
 #define JOURNAL_END      ((__u32 *) (FSYS_BUF + FSYS_BUFLEN))
 
+#define log2(n) ffz(~(n))
 
+/* include/asm-i386/bitops.h */
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
 static __inline__ unsigned long
-log2 (unsigned long word)
+ffz (unsigned long word)
 {
   __asm__ ("bsfl %1,%0"
-           : "=r" (word)
-           : "r" (word));
+:          "=r" (word)
+:          "r" (~word));
   return word;
 }
 

stage2/fsys_vstafs.c

@@ -186 +186 @@
 int 
 vstafs_read (char *addr, int len)
 {
-  struct alloc *a;
+  struct alloc *b;
   int size, ret = 0, offset, curr_len = 0;
-  int curr_ext;
+  int curr_exten;
   char extent;
   int ext_size;
   char *curr_pos;
   
   get_file_info (f_sector);
   size = FILE_INFO->len-VSTAFS_START_DATA;
-  a = FILE_INFO->blocks;
+  b = FILE_INFO->blocks;
   
   if (filepos > 0)
     {
-      if (filepos < a[0].a_len * 512 - VSTAFS_START_DATA)
+      if (filepos < b[0].a_len * 512 - VSTAFS_START_DATA)
         {
           offset = filepos + VSTAFS_START_DATA;
           extent = 0;
-          curr_len = a[0].a_len * 512 - offset - filepos; 
+          curr_len = b[0].a_len * 512 - offset - filepos; 
         }
       else
         {
-          ext_size = a[0].a_len * 512 - VSTAFS_START_DATA;
+          ext_size = b[0].a_len * 512 - VSTAFS_START_DATA;
           offset = filepos - ext_size;
           extent = 1;
           do
             {
               curr_len -= ext_size;
               offset -= ext_size;
-              ext_size = a[extent+1].a_len * 512;
+              ext_size = b[extent+1].a_len * 512;
             }
           while (extent < FILE_INFO->extents && offset>ext_size);
         }
@@ -223 +223 @@
     {
       offset = VSTAFS_START_DATA;
       extent = 0;
-      curr_len = a[0].a_len * 512 - offset;
+      curr_len = b[0].a_len * 512 - offset;
     }
   
   curr_pos = addr;
   if (curr_len > len)
     curr_len = len;
   
-  for (curr_ext=extent;
-       curr_ext < FILE_INFO->extents; 
-       curr_len = a[curr_ext].a_len * 512, curr_pos += curr_len, curr_ext++)
+  for (curr_exten = extent;
+       curr_exten < FILE_INFO->extents; 
+       curr_len = b[curr_exten].a_len * 512, curr_pos += curr_len, curr_exten++)
     {
       ret += curr_len;
       size -= curr_len;
@@ -242 +242 @@
           curr_len += size;
         }
       
-      devread (a[curr_ext].a_start,offset, curr_len, curr_pos);
+      devread (b[curr_exten].a_start, offset, curr_len, curr_pos);
       offset = 0;
     }
   

stage2/fsys_xfs.c

@@ -97 +97 @@
         return ino & XFS_INO_MASK(XFS_INO_OFFSET_BITS);
 }
 
-static inline __const__ xfs_uint16_t
+static inline __attribute__((const)) xfs_uint16_t
 le16 (xfs_uint16_t x)
 {
         __asm__("xchgb %b0,%h0" \
@@ -106 +106 @@
                 return x;
 }
 
-static inline __const__ xfs_uint32_t
+static inline __attribute__((const)) xfs_uint32_t
 le32 (xfs_uint32_t x)
 {
 #if 0
@@ -122 +122 @@
         return x;
 }
 
-static inline __const__ xfs_uint64_t
+static inline __attribute__((const)) xfs_uint64_t
 le64 (xfs_uint64_t x)
 {
         xfs_uint32_t h = x >> 32;
@@ -368 +368 @@
                 default:
                         namelen = sfe->namelen;
                         *ino = sf_ino ((char *)sfe, namelen);
-                        name = sfe->name;
+                        name = (char *) sfe->name;
                         sfe = (xfs_dir2_sf_entry_t *)
                                   ((char *)sfe + namelen + 11 - xfs.i8param);
                 }

stage2/gunzip.c

@@ -277 +277 @@
    *  is a compressed file, and simply mark it as such.
    */
   if (no_decompression
-      || grub_read (buf, 10) != 10
+      || grub_read ((char *) buf, 10) != 10
       || ((*((unsigned short *) buf) != GZIP_HDR_LE)
           && (*((unsigned short *) buf) != OLD_GZIP_HDR_LE)))
     {
@@ -293 +293 @@
   if (buf[2] != DEFLATED
       || (buf[3] & UNSUPP_FLAGS)
       || ((buf[3] & EXTRA_FIELD)
-          && (grub_read (buf, 2) != 2
+          && (grub_read ((char *) buf, 2) != 2
               || bad_field (*((unsigned short *) buf))))
       || ((buf[3] & ORIG_NAME) && bad_field (-1))
       || ((buf[3] & COMMENT) && bad_field (-1)))
@@ -308 +308 @@
   
   filepos = filemax - 8;
   
-  if (grub_read (buf, 8) != 8)
+  if (grub_read ((char *) buf, 8) != 8)
     {
       if (! errnum)
         errnum = ERR_BAD_GZIP_HEADER;
@@ -485 +485 @@
 
 #define INBUFSIZ  0x2000
 
-static uch inbuf[INBUFSIZ];
-static int bufloc;
+static unsigned char inbuf[INBUFSIZ];
+static int  bufloc;
 
 static int
 get_byte (void)
@@ -494 +494 @@
   if (filepos == gzip_data_offset || bufloc == INBUFSIZ)
     {
       bufloc = 0;
-      grub_read (inbuf, INBUFSIZ);
+      grub_read ((char *) inbuf, INBUFSIZ);
     }
 
   return inbuf[bufloc++];
@@ -925 +925 @@
   unsigned m;                   /* mask for bit lengths table */
   unsigned n;                   /* number of lengths to get */
   unsigned nb;                  /* number of bit length codes */
-  unsigned nl;                  /* number of literal/length codes */
+  unsigned nc;                  /* number of literal/length codes */
   unsigned nd;                  /* number of distance codes */
   unsigned ll[286 + 30];        /* literal/length and distance code lengths */
   register ulg b;               /* bit buffer */
@@ -937 +937 @@
 
   /* read in table lengths */
   NEEDBITS (5);
-  nl = 257 + ((unsigned) b & 0x1f);     /* number of literal/length codes */
+  nc = 257 + ((unsigned) b & 0x1f);     /* number of literal/length codes */
   DUMPBITS (5);
   NEEDBITS (5);
   nd = 1 + ((unsigned) b & 0x1f);       /* number of distance codes */
@@ -945 +945 @@
   NEEDBITS (4);
   nb = 4 + ((unsigned) b & 0xf);        /* number of bit length codes */
   DUMPBITS (4);
-  if (nl > 286 || nd > 30)
+  if (nc > 286 || nd > 30)
     {
       errnum = ERR_BAD_GZIP_DATA;
       return;
@@ -970 +970 @@
     }
 
   /* read in literal and distance code lengths */
-  n = nl + nd;
+  n = nc + nd;
   m = mask_bits[bl];
   i = l = 0;
   while ((unsigned) i < n)
@@ -1034 +1034 @@
 
   /* build the decoding tables for literal/length and distance codes */
   bl = lbits;
-  if ((i = huft_build (ll, nl, 257, cplens, cplext, &tl, &bl)) != 0)
+  if ((i = huft_build (ll, nc, 257, cplens, cplext, &tl, &bl)) != 0)
     {
 #if 0
       if (i == 1)
@@ -1045 +1045 @@
       return;
     }
   bd = dbits;
-  if ((i = huft_build (ll + nl, nd, 0, cpdist, cpdext, &td, &bd)) != 0)
+  if ((i = huft_build (ll + nc, nd, 0, cpdist, cpdext, &td, &bd)) != 0)
     {
 #if 0
       if (i == 1)

stage2/md5.c

@@ -166 +166 @@
   inputlen -= 64 - buflen;
   while (inputlen >= 64)
     {
-      md5_transform (input);
+      md5_transform ((unsigned char *) input);
       input += 64;
       inputlen -= 64;
     }
@@ -211 +211 @@
   char *p; 
   int saltlen;
   int i, n;
-  unsigned char alt_result[16];
+  char alt_result[16];
   unsigned char *digest;
 
   if (check)

stage2/start_eltorito.S

@@ -40 +40 @@
 #define ABS(x)                  (x-_start+BOOTSEC_LOCATION)
 
 #ifdef STAGE1_5
-# define STAGE_ADDR             0x2000
+# define STAGE_ADDR             0x2200
 #else
-# define STAGE_ADDR             0x8000
+# define STAGE_ADDR             0x8200
 #endif /* STAGE1_5 */
 
         /* Print message string */
@@ -71 +71 @@
         . = _start + 8                      /* Pad to file offset 8 */
 
                 /* This table gets filled in by mkisofs using the
-                   -boot-info-table option */
-bi_pvd:         .long 0xDEADBEEF            /* LBA of primary volume descript */
-bi_file:        .long 0xDEADBEEF            /* LBA of boot file */
-bi_length:      .long 0xDEADBEEF            /* Length of boot file */
-bi_csum:        .long 0xDEADBEEF            /* Checksum of boot file */
-bi_reserved:    .space (10*4)               /* Reserved */
+                   -boot-info-table option If not, the values in this
+                   table are default values that we can use to get us
+                   what we need, at least under a certain set of assumptions. */
+bi_pvd:         .long 16                /* LBA of primary volume descript */
+bi_file:        .long 0                 /* LBA of boot file */
+bi_length:      .long 0xDEADBEEF        /* Length of boot file */
+bi_csum:        .long 0xDEADBEEF        /* Checksum of boot file */
+bi_reserved:    .space (10*4)           /* Reserved */
 
 real_start:
         xor     %ax, %ax
@@ -92 +94 @@
         /* save drive reference first thing! */
         mov     %dl, ABS(BootDrive)
 
-        /* print a notification message on the screen */
-        MSG(notification_string)
+        /* check if machine support IBM/MS int 13h extensions */
+        mov     $0x41, %ah
+        mov     $0x55AA, %bx
+        int     $0x13
+        jnc     load_image
+
+        /* bios doesn't support int 13h extensions, print error messages */
+        MSG(int13_error_string1)
+        MSG(notification_done)
+        MSG(int13_error_string2)
+        MSG(notification_done)
+        MSG(int13_error_string3)
+        MSG(notification_done)
+        /* even when bios says that it doesn't support int 13h
+           extensions, do not stop here and try to load image anyway,
+           because some bioses says that there isn't support for
+           extended functions but have the needed extended read function
+           (int 13h, function AH=42h) */
 
 load_image:
+        /* print a notification message on the screen */
+        MSG(notification_string)
         /* Set up boot file sector, size, load address */
         mov     ABS(bi_length), %eax
         add     $(ISO_SECTOR_SIZE-1), %eax
@@ -105 +125 @@
         mov     %bx, %es
         xor     %bx, %bx
         mov     ABS(bi_file), %eax
+        inc     %eax                /* do not reload the first sector (this code) */
+        dec     %bp                 /* this way we have more room for code in stage1 */
         call    getlinsec
         mov     %ds, %ax
         mov     %ax, %es
@@ -115 +137 @@
         mov     $ABS(firstlist - BOOTSEC_LISTSIZE), %si
         mov     (%si), %ebp
         mov     ABS(BootDrive), %dl         /* this makes sure %dl is our "boot" drive */
-        ljmp    $0, $(STAGE_ADDR+SECTOR_SIZE)  /* jump to main() in asm.S */
+        ljmp    $0, $(STAGE_ADDR)           /* jump to main() in asm.S */
 
 /* go here when you need to stop the machine hard after an error condition */
 stop:   jmp     stop
@@ -171 +193 @@
  */
 xint13:
         movb    $6, ABS(RetryCount)
-        pushal
 .try:
+        pushal
         int     $0x13
         jc      1f
-        add     $(8*4), %sp                 /* Clean up stack */
+        popal                               /* Clean up stack */
         ret
 1:
         mov     %ah, %dl                    /* Save error code */
@@ -276 +298 @@
 
 read_error_string:      .string "Read error 0x"
 
+int13_error_string1:    .string "Support for IBM/MS INT 13h extensions not found"
+int13_error_string2:    .string "GRUB cannot be loaded if int 13h/function AH=42h isn't present"
+int13_error_string3:    .string "Trying to load stage 2 anyway..."
+
 /*
  * EBIOS disk address packet
  */
@@ -306 +332 @@
         .word 0
         .word 0
 
-        . = _start + SECTOR_SIZE - BOOTSEC_LISTSIZE
+        /* size of the code we can place between main body and fixed top location */
+        . = _start + 1536 - BOOTSEC_LISTSIZE
 
         /* fill the first data listing with the default */
 blocklist_default_start:/* this is the sector start parameter, in logical
@@ -321 +348 @@
 #endif
 blocklist_default_seg:  /* this is the segment of the starting address
                            to load the data into */
-        .word (STAGE_ADDR + SECTOR_SIZE) >> 4
+        .word (STAGE_ADDR) >> 4
 
 firstlist:      /* this label has to be after the list data!!! */
+
+        /* this is a workaround to allow more code to be added in stage1,
+           it allows more code to be added for this stage, but for this
+           we can't reload the first sector. So we have to align the code
+           to ISO_SECTOR_SIZE. */
+        . = _start + ISO_SECTOR_SIZE

util/grub-install.in

@@ -336 +336 @@
     # Create a safe temporary file.
     test -n "$mklog" && log_file=`$mklog`
 
+    # Before all invocations of the grub shell, call sync to make sure
+    # the raw device is in sync with any bufferring in filesystems.
+    sync
+ 
     $grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 quit
 EOF
@@ -450 +454 @@
 # Create a safe temporary file.
 test -n "$mklog" && log_file=`$mklog`
 
+# Before all invocations of the grub shell, call sync to make sure
+# the raw device is in sync with any bufferring in filesystems.
+sync
+
 # Now perform the installation.
 $grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 root $root_drive