This patch makes not changes to the generated object code.
Instead removes the assumption the code is linked to run at 0. The
binary code is already PIC, this makes the build process the same way,
making the build requirements more flexible.
Eric
diff -uNr linux-2.5.7.boot2.32bit_entry/arch/i386/boot/bootsect.S linux-2.5.7.boot2.pic16/arch/i386/boot/bootsect.S
--- linux-2.5.7.boot2.32bit_entry/arch/i386/boot/bootsect.S Sun Mar 10 20:07:02 2002
+++ linux-2.5.7.boot2.pic16/arch/i386/boot/bootsect.S Tue Apr 2 11:50:27 2002
@@ -71,7 +71,7 @@
cld
rep
movsw
- ljmp $INITSEG, $go
+ ljmp $INITSEG, $go - _start
# bde - changed 0xff00 to 0x4000 to use debugger at 0x6400 up (bde). We
# wouldn't have to worry about this if we checked the top of memory. Also
@@ -123,12 +123,12 @@
# can be read, 15 if sector 15 can be read. Otherwise guess 9.
# Note that %cx = 0 from rep movsw above.
- movw $disksizes, %si # table of sizes to try
+ movw $disksizes - _start, %si # table of sizes to try
probe_loop:
lodsb
cbtw # extend to word
- movw %ax, sectors
- cmpw $disksizes+4, %si
+ movw %ax, sectors - _start
+ cmpw $disksizes+4 - _start, %si
jae got_sectors # If all else fails, try 9
xchgw %cx, %ax # %cx = track and sector
@@ -146,7 +146,7 @@
movb $0x07, %bl # page 0, attribute 7 (normal)
# %bh is set above; int10 doesn't
# modify it
- movw $msg1, %bp
+ movw $msg1 - _start, %bp
movw $0x1301, %ax # write string, move cursor
int $0x10 # tell the user we're loading..
@@ -155,25 +155,25 @@
# cylinder (for 9-sector 360K and 720K floppies).
movw $0x0001, %ax # set sread (sector-to-read) to 1 as
- movw $sread, %si # the boot sector has already been read
+ movw $sread - _start, %si # the boot sector has already been read
movw %ax, (%si)
call kill_motor # reset FDC
movw $0x0200, %bx # address = 512, in INITSEG
next_step:
- movb setup_sects, %al
- movw sectors, %cx
+ movb setup_sects - _start, %al
+ movw sectors - _start, %cx
subw (%si), %cx # (%si) = sread
cmpb %cl, %al
jbe no_cyl_crossing
- movw sectors, %ax
+ movw sectors - _start, %ax
subw (%si), %ax # (%si) = sread
no_cyl_crossing:
call read_track
pushw %ax # save it
call set_next # set %bx properly; it uses %ax,%cx,%dx
popw %ax # restore
- subb %al, setup_sects # rest - for next step
+ subb %al, setup_sects-_start # rest - for next step
jnz next_step
pushw $SYSSEG
@@ -190,11 +190,11 @@
# Segments are as follows: %cs = %ds = %ss = INITSEG,
# %es = SYSSEG, %fs = 0, %gs is unused.
- movw root_dev, %ax
+ movw root_dev-_start, %ax
orw %ax, %ax
jne root_defined
- movw sectors, %bx
+ movw sectors-_start, %bx
movw $0x0208, %ax # /dev/ps0 - 1.2Mb
cmpw $15, %bx
je root_defined
@@ -209,7 +209,7 @@
movb $0, %al # /dev/fd0 - autodetect
root_defined:
- movw %ax, root_dev
+ movw %ax, root_dev-_start
# After that (everything loaded), we jump to the setup-routine
# loaded directly after the bootblock:
@@ -242,13 +242,13 @@
shr $4, %cx
add %cx, %ax # check offset
#endif
- cmpw syssize, %ax # have we loaded everything yet?
+ cmpw syssize-_start, %ax # have we loaded everything yet?
jbe ok1_read
ret
ok1_read:
- movw sectors, %ax
+ movw sectors-_start, %ax
subw (%si), %ax # (%si) = sread
movw %ax, %cx
shlw $9, %cx
@@ -297,7 +297,7 @@
set_next:
movw %ax, %cx
addw (%si), %ax # (%si) = sread
- cmp sectors, %ax
+ cmp sectors-_start, %ax
jne ok3_set
movw $0x0001, %ax
xorw %ax, 2(%si) # change head
diff -uNr linux-2.5.7.boot2.32bit_entry/arch/i386/boot/setup.S linux-2.5.7.boot2.pic16/arch/i386/boot/setup.S
--- linux-2.5.7.boot2.32bit_entry/arch/i386/boot/setup.S Tue Apr 2 11:46:18 2002
+++ linux-2.5.7.boot2.pic16/arch/i386/boot/setup.S Tue Apr 2 11:50:27 2002
@@ -62,6 +62,12 @@
#define __SETUP_REAL_CS 0x20
#define __SETUP_REAL_DS 0x28
+#ifndef __BIG_KERNEL__
+#define KERNEL_START 0x1000 /* zImage */
+#else
+#define KERNEL_START 0x100000 /* bzImage */
+#endif
+
INITSEG = DEF_INITSEG # 0x9000, we move boot here, out of the way
SYSSEG = DEF_SYSSEG # 0x1000, system loaded at 0x10000 (65536).
SETUPSEG = DEF_SETUPSEG # 0x9020, this is the current segment
@@ -89,11 +95,12 @@
.word 0x0203 # header version number (>= 0x0105)
# or else old loadlin-1.5 will fail)
realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
-start_sys_seg: .word SYSSEG
- .word kernel_version # pointing to kernel version string
+start_sys_seg: # pointing to kernel version string
# above section of header is compatible
# with loadlin-1.5 (header v1.5). Don't
# change it.
+ .word SYSSEG
+ .word kernel_version - start
type_of_loader: .byte 0 # = 0, old one (LILO, Loadlin,
# Bootlin, SYSLX, bootsect...)
@@ -121,13 +128,8 @@
# loader knows how much data behind
# us also needs to be loaded.
-code32_start: # here loaders can put a different
+code32_start: .long KERNEL_START # here loaders can put a different
# start address for 32-bit code.
-#ifndef __BIG_KERNEL__
- .long 0x1000 # 0x1000 = default for zImage
-#else
- .long 0x100000 # 0x100000 = default for big kernel
-#endif
ramdisk_image: .long 0 # address of loaded ramdisk image
# Here the loader puts the 32-bit
@@ -137,9 +139,10 @@
ramdisk_size: .long 0 # its size in bytes
bootsect_kludge:
- .word bootsect_helper, SETUPSEG
+ .word bootsect_helper - start, SETUPSEG
-heap_end_ptr: .word modelist+1024 # (Header version 0x0201 or later)
+heap_end_ptr: .word modelist+1024 - start
+ # (Header version 0x0201 or later)
# space from here (exclusive) down to
# end of setup code can be used by setup
# for local heap purposes.
@@ -185,10 +188,10 @@
movw %cs, %ax # aka SETUPSEG
movw %ax, %ds
# Check signature at end of setup
- cmpw $SIG1, setup_sig1
+ cmpw $SIG1, setup_sig1 - start
jne bad_sig
- cmpw $SIG2, setup_sig2
+ cmpw $SIG2, setup_sig2 - start
jne bad_sig
jmp good_sig1
@@ -239,7 +242,7 @@
movw %bx, %cx
shrw $3, %bx # convert to segment
addw $SYSSEG, %bx
- movw %bx, %cs:start_sys_seg
+ movw %bx, %cs:start_sys_seg - start
# Move rest of setup code/data to here
movw $2048, %di # four sectors loaded by LILO
subw %si, %si
@@ -251,16 +254,16 @@
movsw
movw %cs, %ax # aka SETUPSEG
movw %ax, %ds
- cmpw $SIG1, setup_sig1
+ cmpw $SIG1, setup_sig1 - start
jne no_sig
- cmpw $SIG2, setup_sig2
+ cmpw $SIG2, setup_sig2 - start
jne no_sig
jmp good_sig
no_sig:
- lea no_sig_mess, %si
+ lea no_sig_mess - start, %si
call prtstr
no_sig_loop:
@@ -272,16 +275,16 @@
subw $DELTA_INITSEG, %ax # aka INITSEG
movw %ax, %ds
# Check if an old loader tries to load a big-kernel
- testb $LOADED_HIGH, %cs:loadflags # Do we have a big kernel?
+ testb $LOADED_HIGH, %cs:loadflags - start # Do we have a big kernel?
jz loader_ok # No, no danger for old loaders.
- cmpb $0, %cs:type_of_loader # Do we have a loader that
+ cmpb $0, %cs:type_of_loader - start # Do we have a loader that
# can deal with us?
jnz loader_ok # Yes, continue.
pushw %cs # No, we have an old loader,
popw %ds # die.
- lea loader_panic_mess, %si
+ lea loader_panic_mess - start, %si
call prtstr
jmp no_sig_loop
@@ -340,7 +343,7 @@
incb (E820NR)
movw %di, %ax
- addw $20, %ax
+ addw $E820ENTRY_SIZE, %ax
movw %ax, %di
again820:
cmpl $0, %ebx # check to see if
@@ -547,10 +550,10 @@
#endif
# Now we want to move to protected mode ...
- cmpw $0, %cs:realmode_swtch
+ cmpw $0, %cs:realmode_swtch - start
jz rmodeswtch_normal
- lcall *%cs:realmode_swtch
+ lcall *%cs:realmode_swtch - start
jmp rmodeswtch_end
@@ -561,12 +564,12 @@
rmodeswtch_end:
# we get the code32 start address and modify the below 'jmpi'
# (loader may have changed it)
- movl %cs:code32_start, %eax
- movl %eax, %cs:code32
+ movl %cs:code32_start - start, %eax
+ movl %eax, %cs:code32 - start
# Now we move the system to its rightful place ... but we check if we have a
# big-kernel. In that case we *must* not move it ...
- testb $LOADED_HIGH, %cs:loadflags
+ testb $LOADED_HIGH, %cs:loadflags - start
jz do_move0 # .. then we have a normal low
# loaded zImage
# .. or else we have a high
@@ -577,7 +580,7 @@
movw $0x100, %ax # start of destination segment
movw %cs, %bp # aka SETUPSEG
subw $DELTA_INITSEG, %bp # aka INITSEG
- movw %cs:start_sys_seg, %bx # start of source segment
+ movw %cs:start_sys_seg - start, %bx # start of source segment
cld
do_move:
movw %ax, %es # destination segment
@@ -603,9 +606,9 @@
movw %ax, %ds
# Check whether we need to be downward compatible with version <=201
- cmpl $0, cmd_line_ptr
+ cmpl $0, cmd_line_ptr - start
jne end_move_self # loader uses version >=202 features
- cmpb $0x20, type_of_loader
+ cmpb $0x20, type_of_loader - start
je end_move_self # bootsect loader, we know of it
# Boot loader doesnt support boot protocol version 2.02.
@@ -633,20 +636,20 @@
movw %ax, %ds
movw $INITSEG, %ax # real INITSEG
movw %ax, %es
- movw %cs:setup_move_size, %cx
+ movw %cs:setup_move_size - start, %cx
std # we have to move up, so we use
# direction down because the
# areas may overlap
movw %cx, %di
decw %di
movw %di, %si
- subw $move_self_here+0x200, %cx
+ subw $move_self_here+0x200 -start, %cx
rep
movsb
- ljmp $SETUPSEG, $move_self_here
+ ljmp $SETUPSEG, $move_self_here -start
move_self_here:
- movw $move_self_here+0x200, %cx
+ movw $move_self_here+0x200-start, %cx
rep
movsb
movw $SETUPSEG, %ax
@@ -722,10 +725,10 @@
# A20 is still not responding. Try frobbing it again.
#
- decb (a20_tries)
+ decb (a20_tries - start)
jnz a20_try_loop
- movw $a20_err_msg, %si
+ movw $a20_err_msg - start, %si
call prtstr
a20_die:
@@ -743,13 +746,13 @@
a20_done:
# set up gdt and idt
- lidt idt_48 # load idt with 0,0
+ lidt idt_48 - start # load idt with 0,0
xorl %eax, %eax # Compute gdt_base
movw %ds, %ax # (Convert %ds:gdt to a linear ptr)
shll $4, %eax
- addl $gdt, %eax
- movl %eax, (gdt_48+2)
- lgdt gdt_48 # load gdt with whatever is
+ addl $gdt - start, %eax
+ movl %eax, (gdt_48+2 - start)
+ lgdt gdt_48 - start # load gdt with whatever is
# appropriate
# make sure any possible coprocessor is properly reset..
@@ -839,15 +842,15 @@
# Because there is no place left in the 512 bytes of the boot sector,
# we must emigrate to code space here.
bootsect_helper:
- cmpw $0, %cs:bootsect_es
+ cmpw $0, %cs:bootsect_es - start
jnz bootsect_second
- movb $0x20, %cs:type_of_loader
+ movb $0x20, %cs:type_of_loader - start
movw %es, %ax
shrw $4, %ax
- movb %ah, %cs:bootsect_src_base+2
+ movb %ah, %cs:bootsect_src_base+2 - start
movw %es, %ax
- movw %ax, %cs:bootsect_es
+ movw %ax, %cs:bootsect_es - start
subw $SYSSEG, %ax
lret # nothing else to do for now
@@ -861,15 +864,15 @@
movw $0x8000, %cx # full 64K, INT15 moves words
pushw %cs
popw %es
- movw $bootsect_gdt, %si
+ movw $bootsect_gdt - start, %si
movw $0x8700, %ax
int $0x15
jc bootsect_panic # this, if INT15 fails
- movw %cs:bootsect_es, %es # we reset %es to always point
- incb %cs:bootsect_dst_base+2 # to 0x10000
+ movw %cs:bootsect_es -start, %es # we reset %es to always point
+ incb %cs:bootsect_dst_base+2 -start # to 0x10000
bootsect_ex:
- movb %cs:bootsect_dst_base+2, %ah
+ movb %cs:bootsect_dst_base+2 -start, %ah
shlb $4, %ah # we now have the number of
# moved frames in %ax
xorb %al, %al
@@ -907,7 +910,7 @@
pushw %cs
popw %ds
cld
- leaw bootsect_panic_mess, %si
+ leaw bootsect_panic_mess -start, %si
call prtstr
bootsect_panic_loop:
diff -uNr linux-2.5.7.boot2.32bit_entry/arch/i386/boot/video.S linux-2.5.7.boot2.pic16/arch/i386/boot/video.S
--- linux-2.5.7.boot2.32bit_entry/arch/i386/boot/video.S Thu Jul 5 12:28:16 2001
+++ linux-2.5.7.boot2.pic16/arch/i386/boot/video.S Tue Apr 2 11:50:27 2002
@@ -126,7 +126,7 @@
call mode_set # Set the mode
jc vid1
- leaw badmdt, %si # Invalid mode ID
+ leaw badmdt - start, %si # Invalid mode ID
call prtstr
vid2: call mode_menu
vid1:
@@ -148,14 +148,14 @@
cmpb $0x10, %bl # No, it's a CGA/MDA/HGA card.
je basret
- incb adapter
+ incb adapter - start
movw $0x1a00, %ax # Check EGA or VGA?
int $0x10
cmpb $0x1a, %al # 1a means VGA...
jne basret # anything else is EGA.
incb %fs:(PARAM_HAVE_VGA) # We've detected a VGA
- incb adapter
+ incb adapter - start
basret: ret
# Store the video mode parameters for later usage by the kernel.
@@ -164,7 +164,7 @@
# because some very obscure BIOSes supply insane values.
mode_params:
#ifdef CONFIG_VIDEO_SELECT
- cmpb $0, graphic_mode
+ cmpb $0, graphic_mode - start
jnz mopar_gr
#endif
movb $0x03, %ah # Read cursor position
@@ -178,10 +178,10 @@
cmpb $0x7, %al # MDA/HGA => segment differs
jnz mopar0
- movw $0xb000, video_segment
+ movw $0xb000, video_segment - start
mopar0: movw %gs:(0x485), %ax # Font size
movw %ax, %fs:(PARAM_FONT_POINTS) # (valid only on EGA/VGA)
- movw force_size, %ax # Forced size?
+ movw force_size - start, %ax # Forced size?
orw %ax, %ax
jz mopar1
@@ -190,7 +190,7 @@
ret
mopar1: movb $25, %al
- cmpb $0, adapter # If we are on CGA/MDA/HGA, the
+ cmpb $0, adapter - start # If we are on CGA/MDA/HGA, the
jz mopar2 # screen must have 25 lines.
movb %gs:(0x484), %al # On EGA/VGA, use the EGA+ BIOS
@@ -201,7 +201,7 @@
#ifdef CONFIG_VIDEO_SELECT
# Fetching of VESA frame buffer parameters
mopar_gr:
- leaw modelist+1024, %di
+ leaw modelist+1024 - start, %di
movb $0x23, %fs:(PARAM_HAVE_VGA)
movw 16(%di), %ax
movw %ax, %fs:(PARAM_LFB_LINELENGTH)
@@ -223,7 +223,7 @@
movl %eax, %fs:(PARAM_LFB_COLORS+4)
# get video mem size
- leaw modelist+1024, %di
+ leaw modelist+1024 - start, %di
movw $0x4f00, %ax
int $0x10
xorl %eax, %eax
@@ -243,7 +243,7 @@
# The video mode menu
mode_menu:
- leaw keymsg, %si # "Return/Space/Timeout" message
+ leaw keymsg - start, %si # "Return/Space/Timeout" message
call prtstr
call flush
nokey: call getkt
@@ -260,31 +260,31 @@
defmd1: ret # No mode chosen? Default 80x25
listm: call mode_table # List mode table
-listm0: leaw name_bann, %si # Print adapter name
+listm0: leaw name_bann - start, %si # Print adapter name
call prtstr
- movw card_name, %si
+ movw card_name - start, %si
orw %si, %si
jnz an2
- movb adapter, %al
- leaw old_name, %si
+ movb adapter - start, %al
+ leaw old_name - start, %si
orb %al, %al
jz an1
- leaw ega_name, %si
+ leaw ega_name - start, %si
decb %al
jz an1
- leaw vga_name, %si
+ leaw vga_name - start, %si
jmp an1
an2: call prtstr
- leaw svga_name, %si
+ leaw svga_name - start, %si
an1: call prtstr
- leaw listhdr, %si # Table header
+ leaw listhdr - start, %si # Table header
call prtstr
movb $0x30, %dl # DL holds mode number
- leaw modelist, %si
+ leaw modelist - start, %si
lm1: cmpw $ASK_VGA, (%si) # End?
jz lm2
@@ -311,9 +311,9 @@
movb $0x61, %dl
jmp lm1
-lm2: leaw prompt, %si # Mode prompt
+lm2: leaw prompt - start, %si # Mode prompt
call prtstr
- leaw edit_buf, %di # Editor buffer
+ leaw edit_buf - start, %di # Editor buffer
lm3: call getkey
cmpb $0x0d, %al # Enter?
jz lment
@@ -324,14 +324,14 @@
cmpb $0x20, %al # Printable?
jc lm3
- cmpw $edit_buf+4, %di # Enough space?
+ cmpw $edit_buf + 4 - start, %di # Enough space?
jz lm3
stosb
call prtchr
jmp lm3
-lmbs: cmpw $edit_buf, %di # Backspace
+lmbs: cmpw $edit_buf - start, %di # Backspace
jz lm3
decw %di
@@ -343,9 +343,9 @@
jmp lm3
lment: movb $0, (%di)
- leaw crlft, %si
+ leaw crlft - start, %si
call prtstr
- leaw edit_buf, %si
+ leaw edit_buf - start, %si
cmpb $0, (%si) # Empty string = default mode
jz lmdef
@@ -402,14 +402,14 @@
lmuse: call mode_set
jc lmdef
-lmbad: leaw unknt, %si
+lmbad: leaw unknt - start, %si
call prtstr
jmp lm2
-lmscan: cmpb $0, adapter # Scanning only on EGA/VGA
+lmscan: cmpb $0, adapter - start # Scanning only on EGA/VGA
jz lmbad
- movw $0, mt_end # Scanning of modes is
- movb $1, scanning # done as new autodetection.
+ movw $0, mt_end - start # Scanning of modes is
+ movb $1, scanning - start # done as new autodetection.
call mode_table
jmp listm0
lmdef: ret
@@ -464,7 +464,7 @@
jz setbios
setbad: clc
- movb $0, do_restore # The screen needn't be restored
+ movb $0, do_restore - start # The screen needn't be restored
ret
setvesa:
@@ -496,7 +496,7 @@
jnc setbad
addw %bx, %bx
- jmp *spec_inits(%bx)
+ jmp *spec_inits - start(%bx)
setmenu:
orb %al, %al # 80x25 is an exception
@@ -529,7 +529,7 @@
jmp _m_s
check_vesa:
- leaw modelist+1024, %di
+ leaw modelist+1024-start, %di
subb $VIDEO_FIRST_VESA>>8, %bh
movw %bx, %cx # Get mode information structure
movw $0x4f01, %ax
@@ -555,8 +555,8 @@
cmpw $0x004f, %ax # AL=4f if implemented
jnz _setbad # AH=0 if OK
- movb $1, graphic_mode # flag graphic mode
- movb $0, do_restore # no screen restore
+ movb $1, graphic_mode - start # flag graphic mode
+ movb $0, do_restore - start # no screen restore
stc
ret
@@ -597,19 +597,19 @@
# Table of routines for setting of the special modes.
spec_inits:
- .word set_80x25
- .word set_8pixel
- .word set_80x43
- .word set_80x28
- .word set_current
- .word set_80x30
- .word set_80x34
- .word set_80x60
- .word set_gfx
+ .word set_80x25 - start
+ .word set_8pixel - start
+ .word set_80x43 - start
+ .word set_80x28 - start
+ .word set_current - start
+ .word set_80x30 - start
+ .word set_80x34 - start
+ .word set_80x60 - start
+ .word set_gfx - start
# Set the 80x25 mode. If already set, do nothing.
set_80x25:
- movw $0x5019, force_size # Override possibly broken BIOS
+ movw $0x5019, force_size - start # Override possibly broken BIOS
use_80x25:
#ifdef CONFIG_VIDEO_400_HACK
movw $0x1202, %ax # Force 400 scan lines
@@ -624,7 +624,7 @@
cmpw $0x5003, %ax # Unknown mode, force 80x25 color
jnz force3
-st80: cmpb $0, adapter # CGA/MDA/HGA => mode 3/7 is always 80x25
+st80: cmpb $0, adapter - start # CGA/MDA/HGA => mode 3/7 is always 80x25
jz set80
movb %gs:(0x0484), %al # This is EGA+ -- beware of 80x50 etc.
@@ -719,7 +719,7 @@
orb $0xe2, %al # Set correct sync polarity
outb %al, %dx
popw %dx
- movw $0x501e, force_size
+ movw $0x501e, force_size - start
stc # That's all.
ret
@@ -728,7 +728,7 @@
call set_80x30 # Set 480 scans
call set14 # And 14-pt font
movw $0xdb12, %ax # VGA vertical display end
- movw $0x5022, force_size
+ movw $0x5022, force_size - start
setvde: call outidx
stc
ret
@@ -738,7 +738,7 @@
call set_80x30 # Set 480 scans
call set_8pt # And 8-pt font
movw $0xdf12, %ax # VGA vertical display end
- movw $0x503c, force_size
+ movw $0x503c, force_size - start
jmp setvde
# Special hack for ThinkPad graphics
@@ -747,7 +747,7 @@
movw $VIDEO_GFX_BIOS_AX, %ax
movw $VIDEO_GFX_BIOS_BX, %bx
int $0x10
- movw $VIDEO_GFX_DUMMY_RESOLUTION, force_size
+ movw $VIDEO_GFX_DUMMY_RESOLUTION, force_size - start
stc
#endif
ret
@@ -756,53 +756,53 @@
# Store screen contents to temporary buffer.
store_screen:
- cmpb $0, do_restore # Already stored?
+ cmpb $0, do_restore - start # Already stored?
jnz stsr
- testb $CAN_USE_HEAP, loadflags # Have we space for storing?
+ testb $CAN_USE_HEAP, loadflags -start # Have we space for storing?
jz stsr
pushw %ax
pushw %bx
- pushw force_size # Don't force specific size
- movw $0, force_size
+ pushw force_size - start # Don't force specific size
+ movw $0, force_size - start
call mode_params # Obtain params of current mode
- popw force_size
+ popw force_size - start
movb %fs:(PARAM_VIDEO_LINES), %ah
movb %fs:(PARAM_VIDEO_COLS), %al
movw %ax, %bx # BX=dimensions
mulb %ah
movw %ax, %cx # CX=number of characters
addw %ax, %ax # Calculate image size
- addw $modelist+1024+4, %ax
- cmpw heap_end_ptr, %ax
+ addw $modelist+1024+4-start, %ax
+ cmpw heap_end_ptr - start, %ax
jnc sts1 # Unfortunately, out of memory
movw %fs:(PARAM_CURSOR_POS), %ax # Store mode params
- leaw modelist+1024, %di
+ leaw modelist+1024-start, %di
stosw
movw %bx, %ax
stosw
pushw %ds # Store the screen
- movw video_segment, %ds
+ movw video_segment - start, %ds
xorw %si, %si
rep
movsw
popw %ds
- incb do_restore # Screen will be restored later
+ incb do_restore - start # Screen will be restored later
sts1: popw %bx
popw %ax
stsr: ret
# Restore screen contents from temporary buffer.
restore_screen:
- cmpb $0, do_restore # Has the screen been stored?
+ cmpb $0, do_restore - start # Has the screen been stored?
jz res1
call mode_params # Get parameters of current mode
movb %fs:(PARAM_VIDEO_LINES), %cl
movb %fs:(PARAM_VIDEO_COLS), %ch
- leaw modelist+1024, %si # Screen buffer
+ leaw modelist+1024-start, %si # Screen buffer
lodsw # Set cursor position
movw %ax, %dx
cmpb %cl, %dh
@@ -841,7 +841,7 @@
xchgb %ch, %cl
movw %cx, %bp # BP=width of dest. line
pushw %es
- movw video_segment, %es
+ movw video_segment - start, %es
xorw %di, %di # Move the data
addw %bx, %bx # Convert BX and BP to _bytes_
addw %bp, %bp
@@ -879,14 +879,14 @@
# Returns address of the end of the table in DI, the end is marked
# with a ASK_VGA ID.
mode_table:
- movw mt_end, %di # Already filled?
+ movw mt_end - start, %di # Already filled?
orw %di, %di
jnz mtab1x
- leaw modelist, %di # Store standard modes:
+ leaw modelist - start, %di # Store standard modes:
movl $VIDEO_80x25 + 0x50190000, %eax # The 80x25 mode (ALL)
stosl
- movb adapter, %al # CGA/MDA/HGA -- no more modes
+ movb adapter - start, %al # CGA/MDA/HGA -- no more modes
orb %al, %al
jz mtabe
@@ -899,12 +899,12 @@
mtab1x: jmp mtab1
-mtabv: leaw vga_modes, %si # All modes for std VGA
+mtabv: leaw vga_modes - start, %si # All modes for std VGA
movw $vga_modes_end-vga_modes, %cx
rep # I'm unable to use movsw as I don't know how to store a half
movsb # of the expression above to cx without using explicit shr.
- cmpb $0, scanning # Mode scan requested?
+ cmpb $0, scanning - start # Mode scan requested?
jz mscan1
call mode_scan
@@ -929,13 +929,13 @@
mtabe:
#ifdef CONFIG_VIDEO_COMPACT
- leaw modelist, %si
+ leaw modelist - start, %si
movw %di, %dx
movw %si, %di
cmt1: cmpw %dx, %si # Scan all modes
jz cmt2
- leaw modelist, %bx # Find in previous entries
+ leaw modelist - start, %bx # Find in previous entries
movw 2(%si), %cx
cmt3: cmpw %bx, %si
jz cmt4
@@ -956,8 +956,8 @@
#endif /* CONFIG_VIDEO_COMPACT */
movw $ASK_VGA, (%di) # End marker
- movw %di, mt_end
-mtab1: leaw modelist, %si # SI=mode list, DI=list end
+ movw %di, mt_end - start
+mtab1: leaw modelist - start, %si # SI=mode list, DI=list end
ret0: ret
# Modes usable on all standard VGAs
@@ -984,7 +984,7 @@
#ifdef CONFIG_VIDEO_VESA
vesa_modes:
- cmpb $2, adapter # VGA only
+ cmpb $2, adapter - start # VGA only
jnz ret0
movw %di, %bp # BP=original mode table end
@@ -1001,7 +1001,7 @@
cmpw $0x4153, 0x202(%di)
jnz ret0
- movw $vesa_name, card_name # Set name to "VESA VGA"
+ movw $vesa_name - start, card_name - start # Set name to "VESA VGA"
pushw %gs
lgsw 0x20e(%di), %si # GS:SI=mode list
movw $128, %cx # Iteration limit
@@ -1066,11 +1066,11 @@
cmpw $5, %bx
jnc vesan
- movw vesa_text_mode_table(%bx), %ax
+ movw vesa_text_mode_table - start(%bx), %ax
movw %ax, 2(%di)
vesaok: addw $4, %di # The mode is valid. Store it.
vesan: loop vesa1 # Next mode. Limit exceeded => error
-vesae: leaw vesaer, %si
+vesae: leaw vesaer - start, %si
call prtstr
movw %bp, %di # Discard already found modes.
vesar: popw %gs
@@ -1160,7 +1160,7 @@
jz dosvga
movw %bp, %si # Found, copy the modes
- movb svga_prefix, %ah
+ movb svga_prefix - start, %ah
cpsvga: lodsb
orb %al, %al
jz didsv
@@ -1169,7 +1169,7 @@
movsw
jmp cpsvga
-didsv: movw %si, card_name # Store pointer to card name
+didsv: movw %si, card_name - start # Store pointer to card name
didsv1: ret
# Table of all known SVGA cards. For each card, we store a pointer to
@@ -1741,7 +1741,7 @@
cmpb %bh, %al
jne isnot
- movb $VIDEO_FIRST_V7>>8, svga_prefix # Use special mode switching
+ movb $VIDEO_FIRST_V7>>8, svga_prefix - start # Use special mode switching
ret
video7_md:
diff -uNr linux-2.5.7.boot2.32bit_entry/include/asm-i386/e820.h linux-2.5.7.boot2.pic16/include/asm-i386/e820.h
--- linux-2.5.7.boot2.32bit_entry/include/asm-i386/e820.h Fri Aug 18 10:30:51 2000
+++ linux-2.5.7.boot2.pic16/include/asm-i386/e820.h Tue Apr 2 11:50:27 2002
@@ -15,6 +15,7 @@
#define E820MAP 0x2d0 /* our map */
#define E820MAX 32 /* number of entries in E820MAP */
#define E820NR 0x1e8 /* # entries in E820MAP */
+#define E820ENTRY_SIZE 20 /* size of an E820MAP entry */
#define E820_RAM 1
#define E820_RESERVED 2
-
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