MFi386: Get rid of unnecessary use of m4(1) by using cpp(1) instead.
Repocopied by: joe
This commit is contained in:
nyan
parent
a91b5512c4
commit
bd3ac210d0
@ -3,13 +3,13 @@
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PROG= btx.out
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INTERNALPROG=
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NOMAN=
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SRCS= btx.s
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SRCS= btx.S
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CLEANFILES= btx
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M4?= m4
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CFLAGS+=-DPC98
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.if defined(PAGING)
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M4FLAGS+= -DPAGING
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CFLAGS+=-DPAGING
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.endif
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.if defined(BOOT_BTX_NOHANG)
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@ -18,16 +18,15 @@ BOOT_BTX_FLAGS=0x1
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BOOT_BTX_FLAGS=0x0
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.endif
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AFLAGS+= --defsym BTX_FLAGS=${BOOT_BTX_FLAGS}
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AFLAGS+= --defsym PC98=1
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CFLAGS+=-DBTX_FLAGS=${BOOT_BTX_FLAGS}
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.if defined(BTX_SERIAL)
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BOOT_COMCONSOLE_PORT?= 0x238
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BOOT_COMCONSOLE_SPEED?= 9600
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B2SIOFMT?= 0x3
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M4FLAGS+= -DBTX_SERIAL -DSIOPRT=${BOOT_COMCONSOLE_PORT} \
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-DSIOFMT=${B2SIOFMT} -DSIOSPD=${BOOT_COMCONSOLE_SPEED}
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CFLAGS+=-DBTX_SERIAL -DSIOPRT=${BOOT_COMCONSOLE_PORT} \
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-DSIOFMT=${B2SIOFMT} -DSIOSPD=${BOOT_COMCONSOLE_SPEED}
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.endif
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ORG= 0x9000
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@ -39,8 +38,4 @@ LDFLAGS=-N -e start -Ttext ${ORG}
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btx: btx.out
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objcopy -S -O binary btx.out ${.TARGET}
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btx.o: btx.s
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(cd ${.CURDIR}; ${M4} ${M4FLAGS} btx.s) | \
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${AS} ${AFLAGS} -o ${.TARGET}
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.include <bsd.prog.mk>
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@ -71,27 +71,27 @@
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#
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# Screen defaults and assumptions.
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#
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.`ifdef' PC98
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#ifdef PC98
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.set SCR_MAT,0xe1 # Mode/attribute
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.else
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#else
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.set SCR_MAT,0x7 # Mode/attribute
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.endif
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#endif
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.set SCR_COL,0x50 # Columns per row
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.set SCR_ROW,0x19 # Rows per screen
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#
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# BIOS Data Area locations.
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#
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.`ifdef' PC98
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#ifdef PC98
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.set BDA_MEM,0x501 # Free memory
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.set BDA_KEYFLAGS,0x53a # Keyboard shift-state flags
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.set BDA_POS,0x53e # Cursor position
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.else
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#else
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.set BDA_MEM,0x413 # Free memory
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.set BDA_KEYFLAGS,0x417 # Keyboard shift-state flags
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.set BDA_SCR,0x449 # Video mode
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.set BDA_POS,0x450 # Cursor position
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.set BDA_BOOT,0x472 # Boot howto flag
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.endif
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#endif
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#
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# Derivations, for brevity.
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#
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@ -168,7 +168,7 @@ init.4: movb $_ESP0H,TSS_ESP0+1(%di) # Set ESP0
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movb $SEL_SDATA,TSS_SS0(%di) # Set SS0
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movb $_ESP1H,TSS_ESP1+1(%di) # Set ESP1
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movb $_TSSIO,TSS_MAP(%di) # Set I/O bit map base
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ifdef(`PAGING',`
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#ifdef PAGING
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#
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# Create page directory.
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#
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@ -201,25 +201,25 @@ init.6: mov $0x7,%al # Set U:W:P flags
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init.7: stosl # Set entry
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add %edx,%eax # Next address
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loop init.6 # Till done
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')
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#endif
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#
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# Bring up the system.
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#
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mov $0x2820,%bx # Set protected mode
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callw setpic # IRQ offsets
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lidt idtdesc # Set IDT
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ifdef(`PAGING',`
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#ifdef PAGING
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xor %eax,%eax # Set base
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mov $MEM_DIR>>0x8,%ah # of page
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mov %eax,%cr3 # directory
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')
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#endif
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lgdt gdtdesc # Set GDT
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mov %cr0,%eax # Switch to protected
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ifdef(`PAGING',`
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#ifdef PAGING
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or $0x80000001,%eax # mode and enable paging
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',`
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#else
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or $0x01,%eax # mode
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')
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#endif
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mov %eax,%cr0 #
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ljmp $SEL_SCODE,$init.8 # To 32-bit code
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.code32
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@ -233,13 +233,13 @@ init.8: xorl %ecx,%ecx # Zero
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ltr %cx # register
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movl $MEM_USR,%edx # User base address
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movzwl %ss:BDA_MEM,%eax # Get free memory
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.`ifdef' PC98
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#ifdef PC98
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andl $0x7,%eax
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incl %eax
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shll $0x11,%eax # To bytes
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.else
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#else
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shll $0xa,%eax # To bytes
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.endif
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#endif
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subl $0x1000,%eax # Less arg space
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subl %edx,%eax # Less base
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movb $SEL_UDATA,%cl # User data selector
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@ -256,9 +256,9 @@ init.8: xorl %ecx,%ecx # Zero
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movb $0x7,%cl # Set remaining
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init.9: push $0x0 # general
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loop init.9 # registers
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ifdef(`BTX_SERIAL',`
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#ifdef BTX_SERIAL
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call sio_init # setup the serial console
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')
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#endif
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popa # and initialize
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popl %es # Initialize
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popl %ds # user
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@ -302,11 +302,11 @@ exit.1: mov $SEL_RDATA,%cl # 16-bit selector
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exit.2: xor %ax,%ax # Real mode segment
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mov %ax,%ss # Reload SS
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mov %ax,%ds # Address data
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.`ifdef' PC98
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#ifdef PC98
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mov $0x1008,%bx # Set real mode
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.else
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#else
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mov $0x7008,%bx # Set real mode
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.endif
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#endif
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callw setpic # IRQ offsets
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lidt ivtdesc # Set IVT
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#
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@ -315,20 +315,20 @@ exit.2: xor %ax,%ax # Real mode segment
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sti # Enable interrupts
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testb $0x1,btx_hdr+0x7 # Reboot?
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exit.3: jz exit.3 # No
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.`ifdef' PC98
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#ifdef PC98
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movb $0xa0,%al
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outb %al,$0x35
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movb 0,%al
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outb %al,$0xf0
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exit.4: jmp exit.4
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.else
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#else
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movw $0x1234, BDA_BOOT # Do a warm boot
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ljmp $0xf000,$0xfff0 # reboot the machine
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.endif
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#endif
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#
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# Set IRQ offsets by reprogramming 8259A PICs.
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#
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.`ifdef' PC98
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#ifdef PC98
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setpic: in $0x02,%al # Save master
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push %ax # IMR
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in $0x0a,%al # Save slave
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@ -352,7 +352,7 @@ setpic: in $0x02,%al # Save master
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outb %al,$0x0a # IMR
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pop %ax # Restore master
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outb %al,$0x02 # IMR
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.else
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#else
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setpic: in $0x21,%al # Save master
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push %ax # IMR
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in $0xa1,%al # Save slave
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@ -375,7 +375,7 @@ setpic: in $0x21,%al # Save master
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outb %al,$0xa1 # IMR
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pop %ax # Restore master
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outb %al,$0x21 # IMR
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.endif
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#endif
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retw # To caller
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.code32
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#
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@ -455,7 +455,7 @@ except.2: push $SEL_SDATA # Set up
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movl %esp,%ebx # Stack frame
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movl $dmpfmt,%esi # Dump format string
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movl $MEM_BUF,%edi # Buffer
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.`ifdef' PC98
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#ifdef PC98
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pushl %eax
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pushl %edx
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wait.1:
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@ -482,7 +482,7 @@ wait.2:
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movw %ax,(%edx)
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popl %edx
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popl %eax
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.endif
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#endif
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pushl %edi # Dump to
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call dump # buffer
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popl %esi # and
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@ -751,13 +751,13 @@ v86intn: lodsb # Get int no
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v86intn.1: cmpw $0x4f53,%ax # is it the delete key callout?
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jne v86intn.2 # no, handle the int normally
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movb BDA_KEYFLAGS,%al # get the shift key state
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.`ifdef' PC98
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#ifdef PC98
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andb $0x18,%al # mask off just Ctrl and Alt
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cmpb $0x18,%al # are both Ctrl and Alt down?
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.else
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#else
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andb $0xc,%al # mask off just Ctrl and Alt
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cmpb $0xc,%al # are both Ctrl and Alt down?
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.endif
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#endif
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jne v86intn.2 # no, handle the int normally
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popl %eax # restore EAX
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jmp reboot # reboot the machine
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@ -794,7 +794,7 @@ intx20: push $0x8 # Int 0x20: IRQ0
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jmp int_hw # V86 int 0xe
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push $0xf # Int 0x27: IRQ7
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jmp int_hw # V86 int 0xf
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.`ifdef' PC98
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#ifdef PC98
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push $0x10 # Int 0x28: IRQ8
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jmp int_hw # V86 int 0x10
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push $0x11 # Int 0x29: IRQ9
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@ -811,7 +811,7 @@ intx20: push $0x8 # Int 0x20: IRQ0
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jmp int_hw # V86 int 0x16
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push $0x17 # Int 0x2f: IRQ15
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jmp int_hw # V86 int 0x17
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.else
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#else
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push $0x70 # Int 0x28: IRQ8
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jmp int_hw # V86 int 0x70
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push $0x71 # Int 0x29: IRQ9
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@ -828,7 +828,7 @@ intx20: push $0x8 # Int 0x20: IRQ0
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jmp int_hw # V86 int 0x76
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push $0x77 # Int 0x2f: IRQ15
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jmp int_hw # V86 int 0x77
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.endif
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#endif
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#
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# Reflect hardware interrupts.
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#
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@ -966,13 +966,13 @@ intx30: cmpl $SYS_EXEC,%eax # Exec system call?
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movl $MEM_USR,%eax # User base address
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addl 0xc(%esp,1),%eax # Change to user
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leal 0x4(%eax),%esp # stack
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ifdef(`PAGING',`
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#ifdef PAGING
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movl %cr0,%eax # Turn
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andl $~0x80000000,%eax # off
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movl %eax,%cr0 # paging
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xorl %eax,%eax # Flush
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movl %eax,%cr3 # TLB
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')
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#endif
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popl %eax # Call
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call *%eax # program
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intx30.1: orb $0x1,%ss:btx_hdr+0x7 # Flag reboot
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@ -1076,7 +1076,7 @@ putstr: lodsb # Load char
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testb %al,%al # End of string?
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jnz putstr.0 # No
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ret # To caller
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ifdef(`BTX_SERIAL',`
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#ifdef BTX_SERIAL
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.set SIO_PRT,SIOPRT # Base port
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.set SIO_FMT,SIOFMT # 8N1
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.set SIO_DIV,(115200/SIOSPD) # 115200 / SPD
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@ -1149,7 +1149,7 @@ putchr.1: pushl %eax # Push the character
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call sio_putc # Output the character
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popa # Restore
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ret # To caller
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',`
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#else
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#
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# Output character AL to the console.
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#
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@ -1158,17 +1158,17 @@ putchr: pusha # Save
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movb $SCR_MAT,%ah # Mode/attribute
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movl $BDA_POS,%ebx # BDA pointer
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movw (%ebx),%dx # Cursor position
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.`ifdef' PC98
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#ifdef PC98
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movl $0xa0000,%edi
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.else
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#else
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movl $0xb8000,%edi # Regen buffer (color)
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cmpb %ah,BDA_SCR-BDA_POS(%ebx) # Mono mode?
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jne putchr.1 # No
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xorw %di,%di # Regen buffer (mono)
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.endif
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#endif
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putchr.1: cmpb $0xa,%al # New line?
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je putchr.2 # Yes
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.`ifdef' PC98
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#ifdef PC98
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movw %dx,%cx
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movb %al,(%edi,%ecx,1) # Write char
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addl $0x2000,%ecx
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@ -1182,7 +1182,7 @@ putchr.2: movw %dx,%ax
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mul %dl
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movw %ax,%dx
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putchr.3: cmpw $SCR_ROW*SCR_COL*2,%dx
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.else
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#else
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xchgl %eax,%ecx # Save char
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movb $SCR_COL,%al # Columns per row
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mulb %dh # * row position
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@ -1197,28 +1197,28 @@ putchr.3: cmpw $SCR_ROW*SCR_COL*2,%dx
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putchr.2: xorb %dl,%dl # Zero column
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incb %dh # Bump row
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putchr.3: cmpb $SCR_ROW,%dh # Beyond screen?
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.endif
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#endif
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jb putchr.4 # No
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leal 2*SCR_COL(%edi),%esi # New top line
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movw $(SCR_ROW-1)*SCR_COL/2,%cx # Words to move
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rep # Scroll
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movsl # screen
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movb $0x20,%al # Space
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.`ifdef' PC98
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#ifdef PC98
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xorb %ah,%ah
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.endif
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#endif
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movb $SCR_COL,%cl # Columns to clear
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rep # Clear
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stosw # line
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.`ifdef' PC98
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#ifdef PC98
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movw $(SCR_ROW-1)*SCR_COL*2,%dx
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.else
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#else
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movb $SCR_ROW-1,%dh # Bottom line
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.endif
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#endif
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putchr.4: movw %dx,(%ebx) # Update position
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popa # Restore
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ret # To caller
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')
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#endif
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.p2align 4
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#
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File diff suppressed because it is too large
Load Diff
@ -3,14 +3,14 @@
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PROG= btxldr.out
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INTERNALPROG=
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NOMAN=
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SRCS= btxldr.s
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SRCS= btxldr.S
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CLEANFILES= btxldr
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M4?= m4
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M4FLAGS+= -DLOADER_ADDRESS=${LOADER_ADDRESS} -DPC98
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CFLAGS+=-DPC98
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CFLAGS+=-DLOADER_ADDRESS=${LOADER_ADDRESS}
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.if defined(BTXLDR_VERBOSE)
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M4FLAGS+= -DBTXLDR_VERBOSE
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CFLAGS+=-DBTXLDR_VERBOSE
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.endif
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all: btxldr
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@ -20,8 +20,4 @@ LDFLAGS=-N -e start -Ttext ${LOADER_ADDRESS}
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btxldr: btxldr.out
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objcopy -S -O binary btxldr.out ${.TARGET}
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btxldr.o: btxldr.s
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(cd ${.CURDIR}; ${M4} ${M4FLAGS} btxldr.s ) | \
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${AS} ${AFLAGS} -o ${.TARGET}
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.include <bsd.prog.mk>
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@ -43,24 +43,24 @@
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#
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# Screen constants.
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#
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ifdef(`PC98',`
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#ifdef PC98
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.set SCR_MAT,0xe1 # Mode/attribute
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',`
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#else
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.set SCR_MAT,0x7 # Mode/attribute
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')
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#endif
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.set SCR_COL,0x50 # Columns per row
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.set SCR_ROW,0x19 # Rows per screen
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#
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# BIOS Data Area locations.
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#
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ifdef(`PC98',`
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#ifdef PC98
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.set BDA_MEM,0xa1501 # Free memory
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.set BDA_POS,0xa153e # Cursor position
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',`
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#else
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.set BDA_MEM,0x413 # Free memory
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.set BDA_SCR,0x449 # Video mode
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.set BDA_POS,0x450 # Cursor position
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')
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#endif
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#
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# Required by aout gas inadequacy.
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#
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@ -73,7 +73,7 @@ ifdef(`PC98',`
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# BTX program loader for ELF clients.
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#
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start: cld # String ops inc
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ifdef(`PC98',`
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#ifdef PC98
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cli
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gdcwait.1: inb $0x60,%al
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testb $0x04,%al
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@ -94,28 +94,28 @@ gdcwait.2: inb $0x60,%al
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shlw $1,%dx
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movl $BDA_POS,%ebx
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movw %dx,(%ebx)
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')
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#endif
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movl $m_logo,%esi # Identify
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call putstr # ourselves
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movzwl BDA_MEM,%eax # Get base memory
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ifdef(`PC98',`
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#ifdef PC98
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andl $0x7,%eax
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incl %eax
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shll $0x11,%eax # in bytes
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',`
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#else
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shll $0xa,%eax # in bytes
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')
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#endif
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movl %eax,%ebp # Base of user stack
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_mem,%esi # Display
|
||||
call hexout # amount of
|
||||
call putstr # base memory
|
||||
')
|
||||
#endif
|
||||
lgdt gdtdesc # Load new GDT
|
||||
#
|
||||
# Relocate caller's arguments.
|
||||
#
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_esp,%esi # Display
|
||||
movl %esp,%eax # caller
|
||||
call hexout # stack
|
||||
@ -128,7 +128,7 @@ start.1: movl (%ebx),%eax # Get argument and
|
||||
call hexout # Display it
|
||||
loop start.1 # Till done
|
||||
call putstr # End message
|
||||
')
|
||||
#endif
|
||||
movl $0x48,%ecx # Allocate space
|
||||
subl %ecx,%ebp # for bootinfo
|
||||
movl 0x18(%esp,1),%esi # Source: bootinfo
|
||||
@ -138,24 +138,24 @@ start.1: movl (%ebx),%eax # Get argument and
|
||||
rep # Copy
|
||||
movsb # it
|
||||
movl %ebp,0x18(%esp,1) # Update pointer
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_rel_bi,%esi # Display
|
||||
movl %ebp,%eax # bootinfo
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
#endif
|
||||
start_null_bi: movl $0x18,%ecx # Allocate space
|
||||
subl %ecx,%ebp # for arguments
|
||||
leal 0x4(%esp,1),%esi # Source
|
||||
movl %ebp,%edi # Destination
|
||||
rep # Copy
|
||||
movsb # them
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_rel_args,%esi # Display
|
||||
movl %ebp,%eax # argument
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
#endif
|
||||
#
|
||||
# Set up BTX kernel.
|
||||
#
|
||||
@ -186,30 +186,30 @@ ifdef(`BTXLDR_VERBOSE',`
|
||||
addl $MEM_TBL,%edi # address
|
||||
pushl %edi # Save load address
|
||||
movzwl 0xa(%ebx),%ecx # Image size
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
pushl %ecx # Save image size
|
||||
')
|
||||
#endif
|
||||
rep # Relocate
|
||||
movsb # BTX
|
||||
movl %esi,%ebx # Keep place
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_rel_btx,%esi # Restore
|
||||
popl %eax # parameters
|
||||
call hexout # and
|
||||
')
|
||||
#endif
|
||||
popl %ebp # display
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl %ebp,%eax # the
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
#endif
|
||||
addl $PAG_SIZ,%ebp # Display
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_base,%esi # the
|
||||
movl %ebp,%eax # user
|
||||
call hexout # base
|
||||
call putstr # address
|
||||
')
|
||||
#endif
|
||||
#
|
||||
# Set up ELF-format client program.
|
||||
#
|
||||
@ -219,18 +219,18 @@ ifdef(`BTXLDR_VERBOSE',`
|
||||
call putstr # message
|
||||
start.2: jmp start.2 # Hang
|
||||
start.3:
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_elf,%esi # Display ELF
|
||||
call putstr # message
|
||||
movl $m_segs,%esi # Format string
|
||||
')
|
||||
#endif
|
||||
movl $0x2,%edi # Segment count
|
||||
movl 0x1c(%ebx),%edx # Get e_phoff
|
||||
addl %ebx,%edx # To pointer
|
||||
movzwl 0x2c(%ebx),%ecx # Get e_phnum
|
||||
start.4: cmpl $0x1,(%edx) # Is p_type PT_LOAD?
|
||||
jne start.6 # No
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl 0x4(%edx),%eax # Display
|
||||
call hexout # p_offset
|
||||
movl 0x8(%edx),%eax # Display
|
||||
@ -240,7 +240,7 @@ ifdef(`BTXLDR_VERBOSE',`
|
||||
movl 0x14(%edx),%eax # Display
|
||||
call hexout # p_memsz
|
||||
call putstr # End message
|
||||
')
|
||||
#endif
|
||||
pushl %esi # Save
|
||||
pushl %edi # working
|
||||
pushl %ecx # registers
|
||||
@ -265,10 +265,10 @@ start.5: popl %ecx # Restore
|
||||
start.6: addl $0x20,%edx # To next entry
|
||||
loop start.4 # Till done
|
||||
start.7:
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
movl $m_done,%esi # Display done
|
||||
call putstr # message
|
||||
')
|
||||
#endif
|
||||
movl $start.8,%esi # Real mode stub
|
||||
movl $MEM_STUB,%edi # Destination
|
||||
movl $start.9-start.8,%ecx # Size
|
||||
@ -330,17 +330,17 @@ putchr: pusha # Save
|
||||
movb $SCR_MAT,%ah # Mode/attribute
|
||||
movl $BDA_POS,%ebx # BDA pointer
|
||||
movw (%ebx),%dx # Cursor position
|
||||
ifdef(`PC98',`
|
||||
#ifdef PC98
|
||||
movl $0xa0000,%edi # Regen buffer (color)
|
||||
',`
|
||||
#else
|
||||
movl $0xb8000,%edi # Regen buffer (color)
|
||||
cmpb %ah,BDA_SCR-BDA_POS(%ebx) # Mono mode?
|
||||
jne putchr.1 # No
|
||||
xorw %di,%di # Regen buffer (mono)
|
||||
')
|
||||
#endif
|
||||
putchr.1: cmpb $0xa,%al # New line?
|
||||
je putchr.2 # Yes
|
||||
ifdef(`PC98',`
|
||||
#ifdef PC98
|
||||
movw %dx,%cx
|
||||
movb %al,(%edi,%ecx,1) # Write char
|
||||
addl $0x2000,%ecx
|
||||
@ -354,7 +354,7 @@ putchr.2: movw %dx,%ax
|
||||
mul %dl
|
||||
movw %ax,%dx
|
||||
putchr.3: cmpw $SCR_COL*SCR_ROW*2,%dx
|
||||
',`
|
||||
#else
|
||||
xchgl %eax,%ecx # Save char
|
||||
movb $SCR_COL,%al # Columns per row
|
||||
mulb %dh # * row position
|
||||
@ -369,20 +369,20 @@ putchr.3: cmpw $SCR_COL*SCR_ROW*2,%dx
|
||||
putchr.2: xorb %dl,%dl # Zero column
|
||||
incb %dh # Bump row
|
||||
putchr.3: cmpb $SCR_ROW,%dh # Beyond screen?
|
||||
')
|
||||
#endif
|
||||
jb putchr.4 # No
|
||||
leal 2*SCR_COL(%edi),%esi # New top line
|
||||
movw $(SCR_ROW-1)*SCR_COL/2,%cx # Words to move
|
||||
rep # Scroll
|
||||
movsl # screen
|
||||
movb $' ',%al # Space
|
||||
ifdef(`PC98',`
|
||||
#ifdef PC98
|
||||
xorb %ah,%ah
|
||||
')
|
||||
#endif
|
||||
movb $SCR_COL,%cl # Columns to clear
|
||||
rep # Clear
|
||||
stosw # line
|
||||
ifdef(`PC98',`
|
||||
#ifdef PC98
|
||||
movw $(SCR_ROW-1)*SCR_COL*2,%dx
|
||||
putchr.4: movw %dx,(%ebx) # Update position
|
||||
shrw $1,%dx
|
||||
@ -395,10 +395,10 @@ gdcwait.3: inb $0x60,%al
|
||||
outb %al,$0x60
|
||||
movb %dh,%al
|
||||
outb %al,$0x60
|
||||
',`
|
||||
#else
|
||||
movb $SCR_ROW-1,%dh # Bottom line
|
||||
putchr.4: movw %dx,(%ebx) # Update position
|
||||
')
|
||||
#endif
|
||||
popa # Restore
|
||||
ret # To caller
|
||||
#
|
||||
@ -441,7 +441,7 @@ gdtdesc: .word gdt.1-gdt-1 # Limit
|
||||
m_logo: .asciz " \nBTX loader 1.00 "
|
||||
m_vers: .asciz "BTX version is \0\n"
|
||||
e_fmt: .asciz "Error: Client format not supported\n"
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
#ifdef BTXLDR_VERBOSE
|
||||
m_mem: .asciz "Starting in protected mode (base mem=\0)\n"
|
||||
m_esp: .asciz "Arguments passed (esp=\0):\n"
|
||||
m_args: .asciz"<howto="
|
||||
@ -464,7 +464,7 @@ m_segs: .asciz "text segment: offset="
|
||||
.asciz " filesz="
|
||||
.asciz " memsz=\0\n"
|
||||
m_done: .asciz "Loading complete\n"
|
||||
')
|
||||
#endif
|
||||
#
|
||||
# Uninitialized data area.
|
||||
#
|
||||
|
||||
@ -1,471 +0,0 @@
|
||||
#
|
||||
# Copyright (c) 1998 Robert Nordier
|
||||
# All rights reserved.
|
||||
#
|
||||
# Redistribution and use in source and binary forms are freely
|
||||
# permitted provided that the above copyright notice and this
|
||||
# paragraph and the following disclaimer are duplicated in all
|
||||
# such forms.
|
||||
#
|
||||
# This software is provided "AS IS" and without any express or
|
||||
# implied warranties, including, without limitation, the implied
|
||||
# warranties of merchantability and fitness for a particular
|
||||
# purpose.
|
||||
#
|
||||
|
||||
# $FreeBSD$
|
||||
|
||||
#
|
||||
# Prototype BTX loader program, written in a couple of hours. The
|
||||
# real thing should probably be more flexible, and in C.
|
||||
#
|
||||
|
||||
#
|
||||
# Memory locations.
|
||||
#
|
||||
.set MEM_STUB,0x600 # Real mode stub
|
||||
.set MEM_ESP,0x1000 # New stack pointer
|
||||
.set MEM_TBL,0x5000 # BTX page tables
|
||||
.set MEM_ENTRY,0x9010 # BTX entry point
|
||||
.set MEM_DATA,start+0x1000 # Data segment
|
||||
#
|
||||
# Segment selectors.
|
||||
#
|
||||
.set SEL_SCODE,0x8 # 4GB code
|
||||
.set SEL_SDATA,0x10 # 4GB data
|
||||
.set SEL_RCODE,0x18 # 64K code
|
||||
.set SEL_RDATA,0x20 # 64K data
|
||||
#
|
||||
# Paging constants.
|
||||
#
|
||||
.set PAG_SIZ,0x1000 # Page size
|
||||
.set PAG_ENT,0x4 # Page entry size
|
||||
#
|
||||
# Screen constants.
|
||||
#
|
||||
ifdef(`PC98',`
|
||||
.set SCR_MAT,0xe1 # Mode/attribute
|
||||
',`
|
||||
.set SCR_MAT,0x7 # Mode/attribute
|
||||
')
|
||||
.set SCR_COL,0x50 # Columns per row
|
||||
.set SCR_ROW,0x19 # Rows per screen
|
||||
#
|
||||
# BIOS Data Area locations.
|
||||
#
|
||||
ifdef(`PC98',`
|
||||
.set BDA_MEM,0xa1501 # Free memory
|
||||
.set BDA_POS,0xa153e # Cursor position
|
||||
',`
|
||||
.set BDA_MEM,0x413 # Free memory
|
||||
.set BDA_SCR,0x449 # Video mode
|
||||
.set BDA_POS,0x450 # Cursor position
|
||||
')
|
||||
#
|
||||
# Required by aout gas inadequacy.
|
||||
#
|
||||
.set SIZ_STUB,0x1a # Size of stub
|
||||
#
|
||||
# We expect to be loaded by boot2 at the origin defined in ./Makefile.
|
||||
#
|
||||
.globl start
|
||||
#
|
||||
# BTX program loader for ELF clients.
|
||||
#
|
||||
start: cld # String ops inc
|
||||
ifdef(`PC98',`
|
||||
cli
|
||||
gdcwait.1: inb $0x60,%al
|
||||
testb $0x04,%al
|
||||
jz gdcwait.1
|
||||
movb $0xe0,%al
|
||||
outb %al,$0x62
|
||||
nop
|
||||
gdcwait.2: inb $0x60,%al
|
||||
testb $0x01,%al
|
||||
jz gdcwait.2
|
||||
inb $0x62,%al
|
||||
movb %al,%dl
|
||||
inb $0x62,%al
|
||||
movb %al,%dh
|
||||
inb $0x62,%al
|
||||
inb $0x62,%al
|
||||
inb $0x62,%al
|
||||
shlw $1,%dx
|
||||
movl $BDA_POS,%ebx
|
||||
movw %dx,(%ebx)
|
||||
')
|
||||
movl $m_logo,%esi # Identify
|
||||
call putstr # ourselves
|
||||
movzwl BDA_MEM,%eax # Get base memory
|
||||
ifdef(`PC98',`
|
||||
andl $0x7,%eax
|
||||
incl %eax
|
||||
shll $0x11,%eax # in bytes
|
||||
',`
|
||||
shll $0xa,%eax # in bytes
|
||||
')
|
||||
movl %eax,%ebp # Base of user stack
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_mem,%esi # Display
|
||||
call hexout # amount of
|
||||
call putstr # base memory
|
||||
')
|
||||
lgdt gdtdesc # Load new GDT
|
||||
#
|
||||
# Relocate caller's arguments.
|
||||
#
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_esp,%esi # Display
|
||||
movl %esp,%eax # caller
|
||||
call hexout # stack
|
||||
call putstr # pointer
|
||||
movl $m_args,%esi # Format string
|
||||
leal 0x4(%esp,1),%ebx # First argument
|
||||
movl $0x6,%ecx # Count
|
||||
start.1: movl (%ebx),%eax # Get argument and
|
||||
addl $0x4,%ebx # bump pointer
|
||||
call hexout # Display it
|
||||
loop start.1 # Till done
|
||||
call putstr # End message
|
||||
')
|
||||
movl $0x48,%ecx # Allocate space
|
||||
subl %ecx,%ebp # for bootinfo
|
||||
movl 0x18(%esp,1),%esi # Source: bootinfo
|
||||
cmpl $0x0, %esi # If the bootinfo pointer
|
||||
je start_null_bi # is null, don't copy it
|
||||
movl %ebp,%edi # Destination
|
||||
rep # Copy
|
||||
movsb # it
|
||||
movl %ebp,0x18(%esp,1) # Update pointer
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_rel_bi,%esi # Display
|
||||
movl %ebp,%eax # bootinfo
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
start_null_bi: movl $0x18,%ecx # Allocate space
|
||||
subl %ecx,%ebp # for arguments
|
||||
leal 0x4(%esp,1),%esi # Source
|
||||
movl %ebp,%edi # Destination
|
||||
rep # Copy
|
||||
movsb # them
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_rel_args,%esi # Display
|
||||
movl %ebp,%eax # argument
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
#
|
||||
# Set up BTX kernel.
|
||||
#
|
||||
movl $MEM_ESP,%esp # Set up new stack
|
||||
movl $MEM_DATA,%ebx # Data segment
|
||||
movl $m_vers,%esi # Display BTX
|
||||
call putstr # version message
|
||||
movb 0x5(%ebx),%al # Get major version
|
||||
addb $'0',%al # Display
|
||||
call putchr # it
|
||||
movb $'.',%al # And a
|
||||
call putchr # dot
|
||||
movb 0x6(%ebx),%al # Get minor
|
||||
xorb %ah,%ah # version
|
||||
movb $0xa,%dl # Divide
|
||||
divb %dl,%al # by 10
|
||||
addb $'0',%al # Display
|
||||
call putchr # tens
|
||||
movb %ah,%al # Get units
|
||||
addb $'0',%al # Display
|
||||
call putchr # units
|
||||
call putstr # End message
|
||||
movl %ebx,%esi # BTX image
|
||||
movzwl 0x8(%ebx),%edi # Compute
|
||||
orl $PAG_SIZ/PAG_ENT-1,%edi # the
|
||||
incl %edi # BTX
|
||||
shll $0x2,%edi # load
|
||||
addl $MEM_TBL,%edi # address
|
||||
pushl %edi # Save load address
|
||||
movzwl 0xa(%ebx),%ecx # Image size
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
pushl %ecx # Save image size
|
||||
')
|
||||
rep # Relocate
|
||||
movsb # BTX
|
||||
movl %esi,%ebx # Keep place
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_rel_btx,%esi # Restore
|
||||
popl %eax # parameters
|
||||
call hexout # and
|
||||
')
|
||||
popl %ebp # display
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl %ebp,%eax # the
|
||||
call hexout # relocation
|
||||
call putstr # message
|
||||
')
|
||||
addl $PAG_SIZ,%ebp # Display
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_base,%esi # the
|
||||
movl %ebp,%eax # user
|
||||
call hexout # base
|
||||
call putstr # address
|
||||
')
|
||||
#
|
||||
# Set up ELF-format client program.
|
||||
#
|
||||
cmpl $0x464c457f,(%ebx) # ELF magic number?
|
||||
je start.3 # Yes
|
||||
movl $e_fmt,%esi # Display error
|
||||
call putstr # message
|
||||
start.2: jmp start.2 # Hang
|
||||
start.3:
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_elf,%esi # Display ELF
|
||||
call putstr # message
|
||||
movl $m_segs,%esi # Format string
|
||||
')
|
||||
movl $0x2,%edi # Segment count
|
||||
movl 0x1c(%ebx),%edx # Get e_phoff
|
||||
addl %ebx,%edx # To pointer
|
||||
movzwl 0x2c(%ebx),%ecx # Get e_phnum
|
||||
start.4: cmpl $0x1,(%edx) # Is p_type PT_LOAD?
|
||||
jne start.6 # No
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl 0x4(%edx),%eax # Display
|
||||
call hexout # p_offset
|
||||
movl 0x8(%edx),%eax # Display
|
||||
call hexout # p_vaddr
|
||||
movl 0x10(%edx),%eax # Display
|
||||
call hexout # p_filesz
|
||||
movl 0x14(%edx),%eax # Display
|
||||
call hexout # p_memsz
|
||||
call putstr # End message
|
||||
')
|
||||
pushl %esi # Save
|
||||
pushl %edi # working
|
||||
pushl %ecx # registers
|
||||
movl 0x4(%edx),%esi # Get p_offset
|
||||
addl %ebx,%esi # as pointer
|
||||
movl 0x8(%edx),%edi # Get p_vaddr
|
||||
addl %ebp,%edi # as pointer
|
||||
movl 0x10(%edx),%ecx # Get p_filesz
|
||||
rep # Set up
|
||||
movsb # segment
|
||||
movl 0x14(%edx),%ecx # Any bytes
|
||||
subl 0x10(%edx),%ecx # to zero?
|
||||
jz start.5 # No
|
||||
xorb %al,%al # Then
|
||||
rep # zero
|
||||
stosb # them
|
||||
start.5: popl %ecx # Restore
|
||||
popl %edi # working
|
||||
popl %esi # registers
|
||||
decl %edi # Segments to do
|
||||
je start.7 # If none
|
||||
start.6: addl $0x20,%edx # To next entry
|
||||
loop start.4 # Till done
|
||||
start.7:
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
movl $m_done,%esi # Display done
|
||||
call putstr # message
|
||||
')
|
||||
movl $start.8,%esi # Real mode stub
|
||||
movl $MEM_STUB,%edi # Destination
|
||||
movl $start.9-start.8,%ecx # Size
|
||||
rep # Relocate
|
||||
movsb # it
|
||||
ljmp $SEL_RCODE,$MEM_STUB # To 16-bit code
|
||||
.code16
|
||||
start.8: xorw %ax,%ax # Data
|
||||
movb $SEL_RDATA,%al # selector
|
||||
movw %ax,%ss # Reload SS
|
||||
movw %ax,%ds # Reset
|
||||
movw %ax,%es # other
|
||||
movw %ax,%fs # segment
|
||||
movw %ax,%gs # limits
|
||||
movl %cr0,%eax # Switch to
|
||||
decw %ax # real
|
||||
movl %eax,%cr0 # mode
|
||||
ljmp $0,$MEM_ENTRY # Jump to BTX entry point
|
||||
start.9:
|
||||
.code32
|
||||
#
|
||||
# Output message [ESI] followed by EAX in hex.
|
||||
#
|
||||
hexout: pushl %eax # Save
|
||||
call putstr # Display message
|
||||
popl %eax # Restore
|
||||
pushl %esi # Save
|
||||
pushl %edi # caller's
|
||||
movl $buf,%edi # Buffer
|
||||
pushl %edi # Save
|
||||
call hex32 # To hex
|
||||
xorb %al,%al # Terminate
|
||||
stosb # string
|
||||
popl %esi # Restore
|
||||
hexout.1: lodsb # Get a char
|
||||
cmpb $'0',%al # Leading zero?
|
||||
je hexout.1 # Yes
|
||||
testb %al,%al # End of string?
|
||||
jne hexout.2 # No
|
||||
decl %esi # Undo
|
||||
hexout.2: decl %esi # Adjust for inc
|
||||
call putstr # Display hex
|
||||
popl %edi # Restore
|
||||
popl %esi # caller's
|
||||
ret # To caller
|
||||
#
|
||||
# Output zero-terminated string [ESI] to the console.
|
||||
#
|
||||
putstr.0: call putchr # Output char
|
||||
putstr: lodsb # Load char
|
||||
testb %al,%al # End of string?
|
||||
jne putstr.0 # No
|
||||
ret # To caller
|
||||
#
|
||||
# Output character AL to the console.
|
||||
#
|
||||
putchr: pusha # Save
|
||||
xorl %ecx,%ecx # Zero for loops
|
||||
movb $SCR_MAT,%ah # Mode/attribute
|
||||
movl $BDA_POS,%ebx # BDA pointer
|
||||
movw (%ebx),%dx # Cursor position
|
||||
ifdef(`PC98',`
|
||||
movl $0xa0000,%edi # Regen buffer (color)
|
||||
',`
|
||||
movl $0xb8000,%edi # Regen buffer (color)
|
||||
cmpb %ah,BDA_SCR-BDA_POS(%ebx) # Mono mode?
|
||||
jne putchr.1 # No
|
||||
xorw %di,%di # Regen buffer (mono)
|
||||
')
|
||||
putchr.1: cmpb $0xa,%al # New line?
|
||||
je putchr.2 # Yes
|
||||
ifdef(`PC98',`
|
||||
movw %dx,%cx
|
||||
movb %al,(%edi,%ecx,1) # Write char
|
||||
addl $0x2000,%ecx
|
||||
movb %ah,(%edi,%ecx,1) # Write attr
|
||||
addw $0x2,%dx
|
||||
jmp putchr.3
|
||||
putchr.2: movw %dx,%ax
|
||||
movb $SCR_COL*2,%dl
|
||||
div %dl
|
||||
incb %al
|
||||
mul %dl
|
||||
movw %ax,%dx
|
||||
putchr.3: cmpw $SCR_COL*SCR_ROW*2,%dx
|
||||
',`
|
||||
xchgl %eax,%ecx # Save char
|
||||
movb $SCR_COL,%al # Columns per row
|
||||
mulb %dh # * row position
|
||||
addb %dl,%al # + column
|
||||
adcb $0x0,%ah # position
|
||||
shll %eax # * 2
|
||||
xchgl %eax,%ecx # Swap char, offset
|
||||
movw %ax,(%edi,%ecx,1) # Write attr:char
|
||||
incl %edx # Bump cursor
|
||||
cmpb $SCR_COL,%dl # Beyond row?
|
||||
jb putchr.3 # No
|
||||
putchr.2: xorb %dl,%dl # Zero column
|
||||
incb %dh # Bump row
|
||||
putchr.3: cmpb $SCR_ROW,%dh # Beyond screen?
|
||||
')
|
||||
jb putchr.4 # No
|
||||
leal 2*SCR_COL(%edi),%esi # New top line
|
||||
movw $(SCR_ROW-1)*SCR_COL/2,%cx # Words to move
|
||||
rep # Scroll
|
||||
movsl # screen
|
||||
movb $' ',%al # Space
|
||||
ifdef(`PC98',`
|
||||
xorb %ah,%ah
|
||||
')
|
||||
movb $SCR_COL,%cl # Columns to clear
|
||||
rep # Clear
|
||||
stosw # line
|
||||
ifdef(`PC98',`
|
||||
movw $(SCR_ROW-1)*SCR_COL*2,%dx
|
||||
putchr.4: movw %dx,(%ebx) # Update position
|
||||
shrw $1,%dx
|
||||
gdcwait.3: inb $0x60,%al
|
||||
testb $0x04,%al
|
||||
jz gdcwait.3
|
||||
movb $0x49,%al
|
||||
outb %al,$0x62
|
||||
movb %dl,%al
|
||||
outb %al,$0x60
|
||||
movb %dh,%al
|
||||
outb %al,$0x60
|
||||
',`
|
||||
movb $SCR_ROW-1,%dh # Bottom line
|
||||
putchr.4: movw %dx,(%ebx) # Update position
|
||||
')
|
||||
popa # Restore
|
||||
ret # To caller
|
||||
#
|
||||
# Convert EAX, AX, or AL to hex, saving the result to [EDI].
|
||||
#
|
||||
hex32: pushl %eax # Save
|
||||
shrl $0x10,%eax # Do upper
|
||||
call hex16 # 16
|
||||
popl %eax # Restore
|
||||
hex16: call hex16.1 # Do upper 8
|
||||
hex16.1: xchgb %ah,%al # Save/restore
|
||||
hex8: pushl %eax # Save
|
||||
shrb $0x4,%al # Do upper
|
||||
call hex8.1 # 4
|
||||
popl %eax # Restore
|
||||
hex8.1: andb $0xf,%al # Get lower 4
|
||||
cmpb $0xa,%al # Convert
|
||||
sbbb $0x69,%al # to hex
|
||||
das # digit
|
||||
orb $0x20,%al # To lower case
|
||||
stosb # Save char
|
||||
ret # (Recursive)
|
||||
|
||||
.data
|
||||
.p2align 4
|
||||
#
|
||||
# Global descriptor table.
|
||||
#
|
||||
gdt: .word 0x0,0x0,0x0,0x0 # Null entry
|
||||
.word 0xffff,0x0,0x9a00,0xcf # SEL_SCODE
|
||||
.word 0xffff,0x0,0x9200,0xcf # SEL_SDATA
|
||||
.word 0xffff,0x0,0x9a00,0x0 # SEL_RCODE
|
||||
.word 0xffff,0x0,0x9200,0x0 # SEL_RDATA
|
||||
gdt.1:
|
||||
gdtdesc: .word gdt.1-gdt-1 # Limit
|
||||
.long gdt # Base
|
||||
#
|
||||
# Messages.
|
||||
#
|
||||
m_logo: .asciz " \nBTX loader 1.00 "
|
||||
m_vers: .asciz "BTX version is \0\n"
|
||||
e_fmt: .asciz "Error: Client format not supported\n"
|
||||
ifdef(`BTXLDR_VERBOSE',`
|
||||
m_mem: .asciz "Starting in protected mode (base mem=\0)\n"
|
||||
m_esp: .asciz "Arguments passed (esp=\0):\n"
|
||||
m_args: .asciz"<howto="
|
||||
.asciz" bootdev="
|
||||
.asciz" junk="
|
||||
.asciz" "
|
||||
.asciz" "
|
||||
.asciz" bootinfo=\0>\n"
|
||||
m_rel_bi: .asciz "Relocated bootinfo (size=48) to \0\n"
|
||||
m_rel_args: .asciz "Relocated arguments (size=18) to \0\n"
|
||||
m_rel_btx: .asciz "Relocated kernel (size=\0) to \0\n"
|
||||
m_base: .asciz "Client base address is \0\n"
|
||||
m_elf: .asciz "Client format is ELF\n"
|
||||
m_segs: .asciz "text segment: offset="
|
||||
.asciz " vaddr="
|
||||
.asciz " filesz="
|
||||
.asciz " memsz=\0\n"
|
||||
.asciz "data segment: offset="
|
||||
.asciz " vaddr="
|
||||
.asciz " filesz="
|
||||
.asciz " memsz=\0\n"
|
||||
m_done: .asciz "Loading complete\n"
|
||||
')
|
||||
#
|
||||
# Uninitialized data area.
|
||||
#
|
||||
buf: # Scratch buffer
|
||||
Loading…
Reference in New Issue
Block a user