From b410146034a74e9ec4e6db197131dabb274b722c Mon Sep 17 00:00:00 2001 From: Poul-Henning Kamp Date: Mon, 7 Oct 2002 20:56:09 +0000 Subject: [PATCH] Change the comment character from # to // in boot1.s and run it through CPP so we can conditionalized things. Sponsored by: DARPA & NAI Labs --- sys/boot/i386/boot2/Makefile | 3 +- sys/boot/i386/boot2/boot1.S | 644 ++++++++++++++++----------------- sys/boot/i386/boot2/boot1.s | 644 ++++++++++++++++----------------- sys/boot/i386/gptboot/Makefile | 3 +- 4 files changed, 648 insertions(+), 646 deletions(-) diff --git a/sys/boot/i386/boot2/Makefile b/sys/boot/i386/boot2/Makefile index e4ab3f5ddbf1..4526d15b300f 100644 --- a/sys/boot/i386/boot2/Makefile +++ b/sys/boot/i386/boot2/Makefile @@ -49,7 +49,8 @@ boot1.out: boot1.o ${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o boot1.o: boot1.s - ${AS} ${AFLAGS} --defsym FLAGS=${B1FLAGS} ${.IMPSRC} -o ${.TARGET} + ${CPP} ${CFLAGS} ${.IMPSRC} | \ + ${AS} ${AFLAGS} --defsym FLAGS=${B1FLAGS} -o ${.TARGET} boot2.o: boot2.c ${.CURDIR}/../../common/ufsread.c ${CC} ${CFLAGS} -S -o boot2.s.tmp ${.IMPSRC} diff --git a/sys/boot/i386/boot2/boot1.S b/sys/boot/i386/boot2/boot1.S index 50a6d01737d3..29f9560c4eff 100644 --- a/sys/boot/i386/boot2/boot1.S +++ b/sys/boot/i386/boot2/boot1.S @@ -1,360 +1,360 @@ -# -# 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. -# +// +// 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. +// -# $FreeBSD$ +// $FreeBSD$ -# Memory Locations - .set MEM_REL,0x700 # Relocation address - .set MEM_ARG,0x900 # Arguments - .set MEM_ORG,0x7c00 # Origin - .set MEM_BUF,0x8c00 # Load area - .set MEM_BTX,0x9000 # BTX start - .set MEM_JMP,0x9010 # BTX entry point - .set MEM_USR,0xb000 # Client start - .set BDA_BOOT,0x472 # Boot howto flag +// Memory Locations + .set MEM_REL,0x700 // Relocation address + .set MEM_ARG,0x900 // Arguments + .set MEM_ORG,0x7c00 // Origin + .set MEM_BUF,0x8c00 // Load area + .set MEM_BTX,0x9000 // BTX start + .set MEM_JMP,0x9010 // BTX entry point + .set MEM_USR,0xb000 // Client start + .set BDA_BOOT,0x472 // Boot howto flag -# Partition Constants - .set PRT_OFF,0x1be # Partition offset - .set PRT_NUM,0x4 # Partitions - .set PRT_BSD,0xa5 # Partition type +// Partition Constants + .set PRT_OFF,0x1be // Partition offset + .set PRT_NUM,0x4 // Partitions + .set PRT_BSD,0xa5 // Partition type -# Flag Bits - .set FL_PACKET,0x80 # Packet mode +// Flag Bits + .set FL_PACKET,0x80 // Packet mode -# Misc. Constants - .set SIZ_PAG,0x1000 # Page size - .set SIZ_SEC,0x200 # Sector size +// Misc. Constants + .set SIZ_PAG,0x1000 // Page size + .set SIZ_SEC,0x200 // Sector size .globl start .globl xread .code16 -start: jmp main # Start recognizably +start: jmp main // Start recognizably -# This is the start of a standard BIOS Parameter Block (BPB). Most bootable -# FAT disks have this at the start of their MBR. While normal BIOS's will -# work fine without this section, IBM's El Torito emulation "fixes" up the -# BPB by writing into the memory copy of the MBR. Rather than have data -# written into our xread routine, we'll define a BPB to work around it. -# The data marked with (T) indicates a field required for a ThinkPad to -# recognize the disk and (W) indicates fields written from IBM BIOS code. -# The use of the BPB is based on what OpenBSD and NetBSD implemented in -# their boot code but the required fields were determined by trial and error. -# -# Note: If additional space is needed in boot1, one solution would be to -# move the "prompt" message data (below) to replace the OEM ID. +// This is the start of a standard BIOS Parameter Block (BPB). Most bootable +// FAT disks have this at the start of their MBR. While normal BIOS's will +// work fine without this section, IBM's El Torito emulation "fixes" up the +// BPB by writing into the memory copy of the MBR. Rather than have data +// written into our xread routine, we'll define a BPB to work around it. +// The data marked with (T) indicates a field required for a ThinkPad to +// recognize the disk and (W) indicates fields written from IBM BIOS code. +// The use of the BPB is based on what OpenBSD and NetBSD implemented in +// their boot code but the required fields were determined by trial and error. +// +// Note: If additional space is needed in boot1, one solution would be to +// move the "prompt" message data (below) to replace the OEM ID. .org 0x03, 0x00 -oemid: .space 0x08, 0x00 # OEM ID +oemid: .space 0x08, 0x00 // OEM ID .org 0x0b, 0x00 -bpb: .word 512 # sector size (T) - .byte 0 # sectors/clustor - .word 0 # reserved sectors - .byte 0 # number of FATs - .word 0 # root entries - .word 0 # small sectors - .byte 0 # media type (W) - .word 0 # sectors/fat - .word 18 # sectors per track (T) - .word 2 # number of heads (T) - .long 0 # hidden sectors (W) - .long 0 # large sectors +bpb: .word 512 // sector size (T) + .byte 0 // sectors/clustor + .word 0 // reserved sectors + .byte 0 // number of FATs + .word 0 // root entries + .word 0 // small sectors + .byte 0 // media type (W) + .word 0 // sectors/fat + .word 18 // sectors per track (T) + .word 2 // number of heads (T) + .long 0 // hidden sectors (W) + .long 0 // large sectors .org 0x24, 0x00 -ebpb: .byte 0 # BIOS physical drive number (W) +ebpb: .byte 0 // BIOS physical drive number (W) .org 0x25,0x90 -# -# Trampoline used by boot2 to call read to read data from the disk via -# the BIOS. Call with: -# -# %cx:%ax - long - LBA to read in -# %es:(%bx) - caddr_t - buffer to read data into -# %dl - byte - drive to read from -# %dh - byte - num sectors to read -# +// +// Trampoline used by boot2 to call read to read data from the disk via +// the BIOS. Call with: +// +// %cx:%ax - long - LBA to read in +// %es:(%bx) - caddr_t - buffer to read data into +// %dl - byte - drive to read from +// %dh - byte - num sectors to read +// -xread: push %ss # Address - pop %ds # data -# -# Setup an EDD disk packet and pass it to read -# -xread.1: # Starting - pushl $0x0 # absolute - push %cx # block - push %ax # number - push %es # Address of - push %bx # transfer buffer - xor %ax,%ax # Number of - movb %dh,%al # blocks to - push %ax # transfer - push $0x10 # Size of packet - mov %sp,%bp # Packet pointer - callw read # Read from disk - lea 0x10(%bp),%sp # Clear stack - lret # To far caller -# -# Load the rest of boot2 and BTX up, copy the parts to the right locations, -# and start it all up. -# +xread: push %ss // Address + pop %ds // data +// +// Setup an EDD disk packet and pass it to read +// +xread.1: // Starting + pushl $0x0 // absolute + push %cx // block + push %ax // number + push %es // Address of + push %bx // transfer buffer + xor %ax,%ax // Number of + movb %dh,%al // blocks to + push %ax // transfer + push $0x10 // Size of packet + mov %sp,%bp // Packet pointer + callw read // Read from disk + lea 0x10(%bp),%sp // Clear stack + lret // To far caller +// +// Load the rest of boot2 and BTX up, copy the parts to the right locations, +// and start it all up. +// -# -# Setup the segment registers to flat addressing (segment 0) and setup the -# stack to end just below the start of our code. -# -main: cld # String ops inc - xor %cx,%cx # Zero - mov %cx,%es # Address - mov %cx,%ds # data - mov %cx,%ss # Set up - mov $start,%sp # stack -# -# Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets -# %cx == 0x100. -# - mov %sp,%si # Source - mov $MEM_REL,%di # Destination - incb %ch # Word count - rep # Copy - movsw # code -# -# If we are on a hard drive, then load the MBR and look for the first -# FreeBSD slice. We use the fake partition entry below that points to -# the MBR when we call nread. The first pass looks for the first active -# FreeBSD slice. The second pass looks for the first non-active FreeBSD -# slice if the first one fails. -# - mov $part4,%si # Partition - cmpb $0x80,%dl # Hard drive? - jb main.4 # No - movb $0x1,%dh # Block count - callw nread # Read MBR - mov $0x1,%cx # Two passes -main.1: mov $MEM_BUF+PRT_OFF,%si # Partition table - movb $0x1,%dh # Partition -main.2: cmpb $PRT_BSD,0x4(%si) # Our partition type? - jne main.3 # No - jcxz main.5 # If second pass - testb $0x80,(%si) # Active? - jnz main.5 # Yes -main.3: add $0x10,%si # Next entry - incb %dh # Partition - cmpb $0x1+PRT_NUM,%dh # In table? - jb main.2 # Yes - dec %cx # Do two - jcxz main.1 # passes -# -# If we get here, we didn't find any FreeBSD slices at all, so print an -# error message and die. -# - mov $msg_part,%si # Message - jmp error # Error -# -# Floppies use partition 0 of drive 0. -# -main.4: xor %dx,%dx # Partition:drive -# -# Ok, we have a slice and drive in %dx now, so use that to locate and load -# boot2. %si references the start of the slice we are looking for, so go -# ahead and load up the first 16 sectors (boot1 + boot2) from that. When -# we read it in, we conveniently use 0x8c00 as our transfer buffer. Thus, -# boot1 ends up at 0x8c00, and boot2 starts at 0x8c00 + 0x200 = 0x8e00. -# The first part of boot2 is the disklabel, which is 0x200 bytes long. -# The second part is BTX, which is thus loaded into 0x9000, which is where -# it also runs from. The boot2.bin binary starts right after the end of -# BTX, so we have to figure out where the start of it is and then move the -# binary to 0xb000. Normally, BTX clients start at MEM_USR, or 0xa000, but -# when we use btxld to create boot2, we use an entry point of 0x1000. That -# entry point is relative to MEM_USR; thus boot2.bin starts at 0xb000. -# -main.5: mov %dx,MEM_ARG # Save args - movb $0x14,%dh # Sector count - callw nread # Read disk - mov $MEM_BTX,%bx # BTX - mov 0xa(%bx),%si # Get BTX length and set - add %bx,%si # %si to start of boot2.bin - mov $MEM_USR+SIZ_PAG,%di # Client page 1 - mov $MEM_BTX+0x12*SIZ_SEC,%cx # Byte - sub %si,%cx # count - rep # Relocate - movsb # client - sub %di,%cx # Byte count - xorb %al,%al # Zero assumed bss from - rep # the end of boot2.bin - stosb # up to 0x10000 - callw seta20 # Enable A20 - jmp start+MEM_JMP-MEM_ORG # Start BTX -# -# Enable A20 so we can access memory above 1 meg. -# -seta20: cli # Disable interrupts -seta20.1: inb $0x64,%al # Get status - testb $0x2,%al # Busy? - jnz seta20.1 # Yes - movb $0xd1,%al # Command: Write - outb %al,$0x64 # output port -seta20.2: inb $0x64,%al # Get status - testb $0x2,%al # Busy? - jnz seta20.2 # Yes - movb $0xdf,%al # Enable - outb %al,$0x60 # A20 - sti # Enable interrupts - retw # To caller -# -# Trampoline used to call read from within boot1. -# -nread: mov $MEM_BUF,%bx # Transfer buffer - mov 0x8(%si),%ax # Get - mov 0xa(%si),%cx # LBA - push %cs # Read from - callw xread.1 # disk - jnc return # If success, return - mov $msg_read,%si # Otherwise, set the error - # message and fall through to - # the error routine -# -# Print out the error message pointed to by %ds:(%si) followed -# by a prompt, wait for a keypress, and then reboot the machine. -# -error: callw putstr # Display message - mov $prompt,%si # Display - callw putstr # prompt - xorb %ah,%ah # BIOS: Get - int $0x16 # keypress - movw $0x1234, BDA_BOOT # Do a warm boot - ljmp $0xffff,$0x0 # reboot the machine -# -# Display a null-terminated string using the BIOS output. -# -putstr.0: mov $0x7,%bx # Page:attribute - movb $0xe,%ah # BIOS: Display - int $0x10 # character -putstr: lodsb # Get char - testb %al,%al # End of string? - jne putstr.0 # No +// +// Setup the segment registers to flat addressing (segment 0) and setup the +// stack to end just below the start of our code. +// +main: cld // String ops inc + xor %cx,%cx // Zero + mov %cx,%es // Address + mov %cx,%ds // data + mov %cx,%ss // Set up + mov $start,%sp // stack +// +// Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets +// %cx == 0x100. +// + mov %sp,%si // Source + mov $MEM_REL,%di // Destination + incb %ch // Word count + rep // Copy + movsw // code +// +// If we are on a hard drive, then load the MBR and look for the first +// FreeBSD slice. We use the fake partition entry below that points to +// the MBR when we call nread. The first pass looks for the first active +// FreeBSD slice. The second pass looks for the first non-active FreeBSD +// slice if the first one fails. +// + mov $part4,%si // Partition + cmpb $0x80,%dl // Hard drive? + jb main.4 // No + movb $0x1,%dh // Block count + callw nread // Read MBR + mov $0x1,%cx // Two passes +main.1: mov $MEM_BUF+PRT_OFF,%si // Partition table + movb $0x1,%dh // Partition +main.2: cmpb $PRT_BSD,0x4(%si) // Our partition type? + jne main.3 // No + jcxz main.5 // If second pass + testb $0x80,(%si) // Active? + jnz main.5 // Yes +main.3: add $0x10,%si // Next entry + incb %dh // Partition + cmpb $0x1+PRT_NUM,%dh // In table? + jb main.2 // Yes + dec %cx // Do two + jcxz main.1 // passes +// +// If we get here, we didn't find any FreeBSD slices at all, so print an +// error message and die. +// + mov $msg_part,%si // Message + jmp error // Error +// +// Floppies use partition 0 of drive 0. +// +main.4: xor %dx,%dx // Partition:drive +// +// Ok, we have a slice and drive in %dx now, so use that to locate and load +// boot2. %si references the start of the slice we are looking for, so go +// ahead and load up the first 16 sectors (boot1 + boot2) from that. When +// we read it in, we conveniently use 0x8c00 as our transfer buffer. Thus, +// boot1 ends up at 0x8c00, and boot2 starts at 0x8c00 + 0x200 = 0x8e00. +// The first part of boot2 is the disklabel, which is 0x200 bytes long. +// The second part is BTX, which is thus loaded into 0x9000, which is where +// it also runs from. The boot2.bin binary starts right after the end of +// BTX, so we have to figure out where the start of it is and then move the +// binary to 0xb000. Normally, BTX clients start at MEM_USR, or 0xa000, but +// when we use btxld to create boot2, we use an entry point of 0x1000. That +// entry point is relative to MEM_USR; thus boot2.bin starts at 0xb000. +// +main.5: mov %dx,MEM_ARG // Save args + movb $0x14,%dh // Sector count + callw nread // Read disk + mov $MEM_BTX,%bx // BTX + mov 0xa(%bx),%si // Get BTX length and set + add %bx,%si // %si to start of boot2.bin + mov $MEM_USR+SIZ_PAG,%di // Client page 1 + mov $MEM_BTX+0x12*SIZ_SEC,%cx // Byte + sub %si,%cx // count + rep // Relocate + movsb // client + sub %di,%cx // Byte count + xorb %al,%al // Zero assumed bss from + rep // the end of boot2.bin + stosb // up to 0x10000 + callw seta20 // Enable A20 + jmp start+MEM_JMP-MEM_ORG // Start BTX +// +// Enable A20 so we can access memory above 1 meg. +// +seta20: cli // Disable interrupts +seta20.1: inb $0x64,%al // Get status + testb $0x2,%al // Busy? + jnz seta20.1 // Yes + movb $0xd1,%al // Command: Write + outb %al,$0x64 // output port +seta20.2: inb $0x64,%al // Get status + testb $0x2,%al // Busy? + jnz seta20.2 // Yes + movb $0xdf,%al // Enable + outb %al,$0x60 // A20 + sti // Enable interrupts + retw // To caller +// +// Trampoline used to call read from within boot1. +// +nread: mov $MEM_BUF,%bx // Transfer buffer + mov 0x8(%si),%ax // Get + mov 0xa(%si),%cx // LBA + push %cs // Read from + callw xread.1 // disk + jnc return // If success, return + mov $msg_read,%si // Otherwise, set the error + // message and fall through to + // the error routine +// +// Print out the error message pointed to by %ds:(%si) followed +// by a prompt, wait for a keypress, and then reboot the machine. +// +error: callw putstr // Display message + mov $prompt,%si // Display + callw putstr // prompt + xorb %ah,%ah // BIOS: Get + int $0x16 // keypress + movw $0x1234, BDA_BOOT // Do a warm boot + ljmp $0xffff,$0x0 // reboot the machine +// +// Display a null-terminated string using the BIOS output. +// +putstr.0: mov $0x7,%bx // Page:attribute + movb $0xe,%ah // BIOS: Display + int $0x10 // character +putstr: lodsb // Get char + testb %al,%al // End of string? + jne putstr.0 // No -# -# Overused return code. ereturn is used to return an error from the -# read function. Since we assume putstr succeeds, we (ab)use the -# same code when we return from putstr. -# -ereturn: movb $0x1,%ah # Invalid - stc # argument -return: retw # To caller -# -# Reads sectors from the disk. If EDD is enabled, then check if it is -# installed and use it if it is. If it is not installed or not enabled, then -# fall back to using CHS. Since we use a LBA, if we are using CHS, we have to -# fetch the drive parameters from the BIOS and divide it out ourselves. -# Call with: -# -# %dl - byte - drive number -# stack - 10 bytes - EDD Packet -# -read: push %dx # Save - movb $0x8,%ah # BIOS: Get drive - int $0x13 # parameters - movb %dh,%ch # Max head number - pop %dx # Restore - jc return # If error - andb $0x3f,%cl # Sectors per track - jz ereturn # If zero - cli # Disable interrupts - mov 0x8(%bp),%eax # Get LBA - push %dx # Save - movzbl %cl,%ebx # Divide by - xor %edx,%edx # sectors - div %ebx # per track - movb %ch,%bl # Max head number - movb %dl,%ch # Sector number - inc %bx # Divide by - xorb %dl,%dl # number - div %ebx # of heads - movb %dl,%bh # Head number - pop %dx # Restore - cmpl $0x3ff,%eax # Cylinder number supportable? - sti # Enable interrupts - ja read.7 # No, try EDD - xchgb %al,%ah # Set up cylinder - rorb $0x2,%al # number - orb %ch,%al # Merge - inc %ax # sector - xchg %ax,%cx # number - movb %bh,%dh # Head number - subb %ah,%al # Sectors this track - mov 0x2(%bp),%ah # Blocks to read - cmpb %ah,%al # To read - jb read.2 # this - movb %ah,%al # track -read.2: mov $0x5,%di # Try count -read.3: les 0x4(%bp),%bx # Transfer buffer - push %ax # Save - movb $0x2,%ah # BIOS: Read - int $0x13 # from disk - pop %bx # Restore - jnc read.4 # If success - dec %di # Retry? - jz read.6 # No - xorb %ah,%ah # BIOS: Reset - int $0x13 # disk system - xchg %bx,%ax # Block count - jmp read.3 # Continue -read.4: movzbw %bl,%ax # Sectors read - add %ax,0x8(%bp) # Adjust - jnc read.5 # LBA, - incw 0xa(%bp) # transfer -read.5: shlb %bl # buffer - add %bl,0x5(%bp) # pointer, - sub %al,0x2(%bp) # block count - ja read # If not done -read.6: retw # To caller -read.7: testb $FL_PACKET,%cs:MEM_REL+flags-start # LBA support enabled? - jz ereturn # No, so return an error - mov $0x55aa,%bx # Magic - push %dx # Save - movb $0x41,%ah # BIOS: Check - int $0x13 # extensions present - pop %dx # Restore - jc return # If error, return an error - cmp $0xaa55,%bx # Magic? - jne ereturn # No, so return an error - testb $0x1,%cl # Packet interface? - jz ereturn # No, so return an error - mov %bp,%si # Disk packet - movb $0x42,%ah # BIOS: Extended - int $0x13 # read - retw # To caller +// +// Overused return code. ereturn is used to return an error from the +// read function. Since we assume putstr succeeds, we (ab)use the +// same code when we return from putstr. +// +ereturn: movb $0x1,%ah // Invalid + stc // argument +return: retw // To caller +// +// Reads sectors from the disk. If EDD is enabled, then check if it is +// installed and use it if it is. If it is not installed or not enabled, then +// fall back to using CHS. Since we use a LBA, if we are using CHS, we have to +// fetch the drive parameters from the BIOS and divide it out ourselves. +// Call with: +// +// %dl - byte - drive number +// stack - 10 bytes - EDD Packet +// +read: push %dx // Save + movb $0x8,%ah // BIOS: Get drive + int $0x13 // parameters + movb %dh,%ch // Max head number + pop %dx // Restore + jc return // If error + andb $0x3f,%cl // Sectors per track + jz ereturn // If zero + cli // Disable interrupts + mov 0x8(%bp),%eax // Get LBA + push %dx // Save + movzbl %cl,%ebx // Divide by + xor %edx,%edx // sectors + div %ebx // per track + movb %ch,%bl // Max head number + movb %dl,%ch // Sector number + inc %bx // Divide by + xorb %dl,%dl // number + div %ebx // of heads + movb %dl,%bh // Head number + pop %dx // Restore + cmpl $0x3ff,%eax // Cylinder number supportable? + sti // Enable interrupts + ja read.7 // No, try EDD + xchgb %al,%ah // Set up cylinder + rorb $0x2,%al // number + orb %ch,%al // Merge + inc %ax // sector + xchg %ax,%cx // number + movb %bh,%dh // Head number + subb %ah,%al // Sectors this track + mov 0x2(%bp),%ah // Blocks to read + cmpb %ah,%al // To read + jb read.2 // this + movb %ah,%al // track +read.2: mov $0x5,%di // Try count +read.3: les 0x4(%bp),%bx // Transfer buffer + push %ax // Save + movb $0x2,%ah // BIOS: Read + int $0x13 // from disk + pop %bx // Restore + jnc read.4 // If success + dec %di // Retry? + jz read.6 // No + xorb %ah,%ah // BIOS: Reset + int $0x13 // disk system + xchg %bx,%ax // Block count + jmp read.3 // Continue +read.4: movzbw %bl,%ax // Sectors read + add %ax,0x8(%bp) // Adjust + jnc read.5 // LBA, + incw 0xa(%bp) // transfer +read.5: shlb %bl // buffer + add %bl,0x5(%bp) // pointer, + sub %al,0x2(%bp) // block count + ja read // If not done +read.6: retw // To caller +read.7: testb $FL_PACKET,%cs:MEM_REL+flags-start // LBA support enabled? + jz ereturn // No, so return an error + mov $0x55aa,%bx // Magic + push %dx // Save + movb $0x41,%ah // BIOS: Check + int $0x13 // extensions present + pop %dx // Restore + jc return // If error, return an error + cmp $0xaa55,%bx // Magic? + jne ereturn // No, so return an error + testb $0x1,%cl // Packet interface? + jz ereturn // No, so return an error + mov %bp,%si // Disk packet + movb $0x42,%ah // BIOS: Extended + int $0x13 // read + retw // To caller -# Messages +// Messages msg_read: .asciz "Read" msg_part: .asciz "Boot" prompt: .asciz " error\r\n" -flags: .byte FLAGS # Flags +flags: .byte FLAGS // Flags .org PRT_OFF,0x90 -# Partition table +// Partition table .fill 0x30,0x1,0x0 part4: .byte 0x80, 0x00, 0x01, 0x00 .byte 0xa5, 0xfe, 0xff, 0xff .byte 0x00, 0x00, 0x00, 0x00 - .byte 0x50, 0xc3, 0x00, 0x00 # 50000 sectors long, bleh + .byte 0x50, 0xc3, 0x00, 0x00 // 50000 sectors long, bleh - .word 0xaa55 # Magic number + .word 0xaa55 // Magic number diff --git a/sys/boot/i386/boot2/boot1.s b/sys/boot/i386/boot2/boot1.s index 50a6d01737d3..29f9560c4eff 100644 --- a/sys/boot/i386/boot2/boot1.s +++ b/sys/boot/i386/boot2/boot1.s @@ -1,360 +1,360 @@ -# -# 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. -# +// +// 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. +// -# $FreeBSD$ +// $FreeBSD$ -# Memory Locations - .set MEM_REL,0x700 # Relocation address - .set MEM_ARG,0x900 # Arguments - .set MEM_ORG,0x7c00 # Origin - .set MEM_BUF,0x8c00 # Load area - .set MEM_BTX,0x9000 # BTX start - .set MEM_JMP,0x9010 # BTX entry point - .set MEM_USR,0xb000 # Client start - .set BDA_BOOT,0x472 # Boot howto flag +// Memory Locations + .set MEM_REL,0x700 // Relocation address + .set MEM_ARG,0x900 // Arguments + .set MEM_ORG,0x7c00 // Origin + .set MEM_BUF,0x8c00 // Load area + .set MEM_BTX,0x9000 // BTX start + .set MEM_JMP,0x9010 // BTX entry point + .set MEM_USR,0xb000 // Client start + .set BDA_BOOT,0x472 // Boot howto flag -# Partition Constants - .set PRT_OFF,0x1be # Partition offset - .set PRT_NUM,0x4 # Partitions - .set PRT_BSD,0xa5 # Partition type +// Partition Constants + .set PRT_OFF,0x1be // Partition offset + .set PRT_NUM,0x4 // Partitions + .set PRT_BSD,0xa5 // Partition type -# Flag Bits - .set FL_PACKET,0x80 # Packet mode +// Flag Bits + .set FL_PACKET,0x80 // Packet mode -# Misc. Constants - .set SIZ_PAG,0x1000 # Page size - .set SIZ_SEC,0x200 # Sector size +// Misc. Constants + .set SIZ_PAG,0x1000 // Page size + .set SIZ_SEC,0x200 // Sector size .globl start .globl xread .code16 -start: jmp main # Start recognizably +start: jmp main // Start recognizably -# This is the start of a standard BIOS Parameter Block (BPB). Most bootable -# FAT disks have this at the start of their MBR. While normal BIOS's will -# work fine without this section, IBM's El Torito emulation "fixes" up the -# BPB by writing into the memory copy of the MBR. Rather than have data -# written into our xread routine, we'll define a BPB to work around it. -# The data marked with (T) indicates a field required for a ThinkPad to -# recognize the disk and (W) indicates fields written from IBM BIOS code. -# The use of the BPB is based on what OpenBSD and NetBSD implemented in -# their boot code but the required fields were determined by trial and error. -# -# Note: If additional space is needed in boot1, one solution would be to -# move the "prompt" message data (below) to replace the OEM ID. +// This is the start of a standard BIOS Parameter Block (BPB). Most bootable +// FAT disks have this at the start of their MBR. While normal BIOS's will +// work fine without this section, IBM's El Torito emulation "fixes" up the +// BPB by writing into the memory copy of the MBR. Rather than have data +// written into our xread routine, we'll define a BPB to work around it. +// The data marked with (T) indicates a field required for a ThinkPad to +// recognize the disk and (W) indicates fields written from IBM BIOS code. +// The use of the BPB is based on what OpenBSD and NetBSD implemented in +// their boot code but the required fields were determined by trial and error. +// +// Note: If additional space is needed in boot1, one solution would be to +// move the "prompt" message data (below) to replace the OEM ID. .org 0x03, 0x00 -oemid: .space 0x08, 0x00 # OEM ID +oemid: .space 0x08, 0x00 // OEM ID .org 0x0b, 0x00 -bpb: .word 512 # sector size (T) - .byte 0 # sectors/clustor - .word 0 # reserved sectors - .byte 0 # number of FATs - .word 0 # root entries - .word 0 # small sectors - .byte 0 # media type (W) - .word 0 # sectors/fat - .word 18 # sectors per track (T) - .word 2 # number of heads (T) - .long 0 # hidden sectors (W) - .long 0 # large sectors +bpb: .word 512 // sector size (T) + .byte 0 // sectors/clustor + .word 0 // reserved sectors + .byte 0 // number of FATs + .word 0 // root entries + .word 0 // small sectors + .byte 0 // media type (W) + .word 0 // sectors/fat + .word 18 // sectors per track (T) + .word 2 // number of heads (T) + .long 0 // hidden sectors (W) + .long 0 // large sectors .org 0x24, 0x00 -ebpb: .byte 0 # BIOS physical drive number (W) +ebpb: .byte 0 // BIOS physical drive number (W) .org 0x25,0x90 -# -# Trampoline used by boot2 to call read to read data from the disk via -# the BIOS. Call with: -# -# %cx:%ax - long - LBA to read in -# %es:(%bx) - caddr_t - buffer to read data into -# %dl - byte - drive to read from -# %dh - byte - num sectors to read -# +// +// Trampoline used by boot2 to call read to read data from the disk via +// the BIOS. Call with: +// +// %cx:%ax - long - LBA to read in +// %es:(%bx) - caddr_t - buffer to read data into +// %dl - byte - drive to read from +// %dh - byte - num sectors to read +// -xread: push %ss # Address - pop %ds # data -# -# Setup an EDD disk packet and pass it to read -# -xread.1: # Starting - pushl $0x0 # absolute - push %cx # block - push %ax # number - push %es # Address of - push %bx # transfer buffer - xor %ax,%ax # Number of - movb %dh,%al # blocks to - push %ax # transfer - push $0x10 # Size of packet - mov %sp,%bp # Packet pointer - callw read # Read from disk - lea 0x10(%bp),%sp # Clear stack - lret # To far caller -# -# Load the rest of boot2 and BTX up, copy the parts to the right locations, -# and start it all up. -# +xread: push %ss // Address + pop %ds // data +// +// Setup an EDD disk packet and pass it to read +// +xread.1: // Starting + pushl $0x0 // absolute + push %cx // block + push %ax // number + push %es // Address of + push %bx // transfer buffer + xor %ax,%ax // Number of + movb %dh,%al // blocks to + push %ax // transfer + push $0x10 // Size of packet + mov %sp,%bp // Packet pointer + callw read // Read from disk + lea 0x10(%bp),%sp // Clear stack + lret // To far caller +// +// Load the rest of boot2 and BTX up, copy the parts to the right locations, +// and start it all up. +// -# -# Setup the segment registers to flat addressing (segment 0) and setup the -# stack to end just below the start of our code. -# -main: cld # String ops inc - xor %cx,%cx # Zero - mov %cx,%es # Address - mov %cx,%ds # data - mov %cx,%ss # Set up - mov $start,%sp # stack -# -# Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets -# %cx == 0x100. -# - mov %sp,%si # Source - mov $MEM_REL,%di # Destination - incb %ch # Word count - rep # Copy - movsw # code -# -# If we are on a hard drive, then load the MBR and look for the first -# FreeBSD slice. We use the fake partition entry below that points to -# the MBR when we call nread. The first pass looks for the first active -# FreeBSD slice. The second pass looks for the first non-active FreeBSD -# slice if the first one fails. -# - mov $part4,%si # Partition - cmpb $0x80,%dl # Hard drive? - jb main.4 # No - movb $0x1,%dh # Block count - callw nread # Read MBR - mov $0x1,%cx # Two passes -main.1: mov $MEM_BUF+PRT_OFF,%si # Partition table - movb $0x1,%dh # Partition -main.2: cmpb $PRT_BSD,0x4(%si) # Our partition type? - jne main.3 # No - jcxz main.5 # If second pass - testb $0x80,(%si) # Active? - jnz main.5 # Yes -main.3: add $0x10,%si # Next entry - incb %dh # Partition - cmpb $0x1+PRT_NUM,%dh # In table? - jb main.2 # Yes - dec %cx # Do two - jcxz main.1 # passes -# -# If we get here, we didn't find any FreeBSD slices at all, so print an -# error message and die. -# - mov $msg_part,%si # Message - jmp error # Error -# -# Floppies use partition 0 of drive 0. -# -main.4: xor %dx,%dx # Partition:drive -# -# Ok, we have a slice and drive in %dx now, so use that to locate and load -# boot2. %si references the start of the slice we are looking for, so go -# ahead and load up the first 16 sectors (boot1 + boot2) from that. When -# we read it in, we conveniently use 0x8c00 as our transfer buffer. Thus, -# boot1 ends up at 0x8c00, and boot2 starts at 0x8c00 + 0x200 = 0x8e00. -# The first part of boot2 is the disklabel, which is 0x200 bytes long. -# The second part is BTX, which is thus loaded into 0x9000, which is where -# it also runs from. The boot2.bin binary starts right after the end of -# BTX, so we have to figure out where the start of it is and then move the -# binary to 0xb000. Normally, BTX clients start at MEM_USR, or 0xa000, but -# when we use btxld to create boot2, we use an entry point of 0x1000. That -# entry point is relative to MEM_USR; thus boot2.bin starts at 0xb000. -# -main.5: mov %dx,MEM_ARG # Save args - movb $0x14,%dh # Sector count - callw nread # Read disk - mov $MEM_BTX,%bx # BTX - mov 0xa(%bx),%si # Get BTX length and set - add %bx,%si # %si to start of boot2.bin - mov $MEM_USR+SIZ_PAG,%di # Client page 1 - mov $MEM_BTX+0x12*SIZ_SEC,%cx # Byte - sub %si,%cx # count - rep # Relocate - movsb # client - sub %di,%cx # Byte count - xorb %al,%al # Zero assumed bss from - rep # the end of boot2.bin - stosb # up to 0x10000 - callw seta20 # Enable A20 - jmp start+MEM_JMP-MEM_ORG # Start BTX -# -# Enable A20 so we can access memory above 1 meg. -# -seta20: cli # Disable interrupts -seta20.1: inb $0x64,%al # Get status - testb $0x2,%al # Busy? - jnz seta20.1 # Yes - movb $0xd1,%al # Command: Write - outb %al,$0x64 # output port -seta20.2: inb $0x64,%al # Get status - testb $0x2,%al # Busy? - jnz seta20.2 # Yes - movb $0xdf,%al # Enable - outb %al,$0x60 # A20 - sti # Enable interrupts - retw # To caller -# -# Trampoline used to call read from within boot1. -# -nread: mov $MEM_BUF,%bx # Transfer buffer - mov 0x8(%si),%ax # Get - mov 0xa(%si),%cx # LBA - push %cs # Read from - callw xread.1 # disk - jnc return # If success, return - mov $msg_read,%si # Otherwise, set the error - # message and fall through to - # the error routine -# -# Print out the error message pointed to by %ds:(%si) followed -# by a prompt, wait for a keypress, and then reboot the machine. -# -error: callw putstr # Display message - mov $prompt,%si # Display - callw putstr # prompt - xorb %ah,%ah # BIOS: Get - int $0x16 # keypress - movw $0x1234, BDA_BOOT # Do a warm boot - ljmp $0xffff,$0x0 # reboot the machine -# -# Display a null-terminated string using the BIOS output. -# -putstr.0: mov $0x7,%bx # Page:attribute - movb $0xe,%ah # BIOS: Display - int $0x10 # character -putstr: lodsb # Get char - testb %al,%al # End of string? - jne putstr.0 # No +// +// Setup the segment registers to flat addressing (segment 0) and setup the +// stack to end just below the start of our code. +// +main: cld // String ops inc + xor %cx,%cx // Zero + mov %cx,%es // Address + mov %cx,%ds // data + mov %cx,%ss // Set up + mov $start,%sp // stack +// +// Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets +// %cx == 0x100. +// + mov %sp,%si // Source + mov $MEM_REL,%di // Destination + incb %ch // Word count + rep // Copy + movsw // code +// +// If we are on a hard drive, then load the MBR and look for the first +// FreeBSD slice. We use the fake partition entry below that points to +// the MBR when we call nread. The first pass looks for the first active +// FreeBSD slice. The second pass looks for the first non-active FreeBSD +// slice if the first one fails. +// + mov $part4,%si // Partition + cmpb $0x80,%dl // Hard drive? + jb main.4 // No + movb $0x1,%dh // Block count + callw nread // Read MBR + mov $0x1,%cx // Two passes +main.1: mov $MEM_BUF+PRT_OFF,%si // Partition table + movb $0x1,%dh // Partition +main.2: cmpb $PRT_BSD,0x4(%si) // Our partition type? + jne main.3 // No + jcxz main.5 // If second pass + testb $0x80,(%si) // Active? + jnz main.5 // Yes +main.3: add $0x10,%si // Next entry + incb %dh // Partition + cmpb $0x1+PRT_NUM,%dh // In table? + jb main.2 // Yes + dec %cx // Do two + jcxz main.1 // passes +// +// If we get here, we didn't find any FreeBSD slices at all, so print an +// error message and die. +// + mov $msg_part,%si // Message + jmp error // Error +// +// Floppies use partition 0 of drive 0. +// +main.4: xor %dx,%dx // Partition:drive +// +// Ok, we have a slice and drive in %dx now, so use that to locate and load +// boot2. %si references the start of the slice we are looking for, so go +// ahead and load up the first 16 sectors (boot1 + boot2) from that. When +// we read it in, we conveniently use 0x8c00 as our transfer buffer. Thus, +// boot1 ends up at 0x8c00, and boot2 starts at 0x8c00 + 0x200 = 0x8e00. +// The first part of boot2 is the disklabel, which is 0x200 bytes long. +// The second part is BTX, which is thus loaded into 0x9000, which is where +// it also runs from. The boot2.bin binary starts right after the end of +// BTX, so we have to figure out where the start of it is and then move the +// binary to 0xb000. Normally, BTX clients start at MEM_USR, or 0xa000, but +// when we use btxld to create boot2, we use an entry point of 0x1000. That +// entry point is relative to MEM_USR; thus boot2.bin starts at 0xb000. +// +main.5: mov %dx,MEM_ARG // Save args + movb $0x14,%dh // Sector count + callw nread // Read disk + mov $MEM_BTX,%bx // BTX + mov 0xa(%bx),%si // Get BTX length and set + add %bx,%si // %si to start of boot2.bin + mov $MEM_USR+SIZ_PAG,%di // Client page 1 + mov $MEM_BTX+0x12*SIZ_SEC,%cx // Byte + sub %si,%cx // count + rep // Relocate + movsb // client + sub %di,%cx // Byte count + xorb %al,%al // Zero assumed bss from + rep // the end of boot2.bin + stosb // up to 0x10000 + callw seta20 // Enable A20 + jmp start+MEM_JMP-MEM_ORG // Start BTX +// +// Enable A20 so we can access memory above 1 meg. +// +seta20: cli // Disable interrupts +seta20.1: inb $0x64,%al // Get status + testb $0x2,%al // Busy? + jnz seta20.1 // Yes + movb $0xd1,%al // Command: Write + outb %al,$0x64 // output port +seta20.2: inb $0x64,%al // Get status + testb $0x2,%al // Busy? + jnz seta20.2 // Yes + movb $0xdf,%al // Enable + outb %al,$0x60 // A20 + sti // Enable interrupts + retw // To caller +// +// Trampoline used to call read from within boot1. +// +nread: mov $MEM_BUF,%bx // Transfer buffer + mov 0x8(%si),%ax // Get + mov 0xa(%si),%cx // LBA + push %cs // Read from + callw xread.1 // disk + jnc return // If success, return + mov $msg_read,%si // Otherwise, set the error + // message and fall through to + // the error routine +// +// Print out the error message pointed to by %ds:(%si) followed +// by a prompt, wait for a keypress, and then reboot the machine. +// +error: callw putstr // Display message + mov $prompt,%si // Display + callw putstr // prompt + xorb %ah,%ah // BIOS: Get + int $0x16 // keypress + movw $0x1234, BDA_BOOT // Do a warm boot + ljmp $0xffff,$0x0 // reboot the machine +// +// Display a null-terminated string using the BIOS output. +// +putstr.0: mov $0x7,%bx // Page:attribute + movb $0xe,%ah // BIOS: Display + int $0x10 // character +putstr: lodsb // Get char + testb %al,%al // End of string? + jne putstr.0 // No -# -# Overused return code. ereturn is used to return an error from the -# read function. Since we assume putstr succeeds, we (ab)use the -# same code when we return from putstr. -# -ereturn: movb $0x1,%ah # Invalid - stc # argument -return: retw # To caller -# -# Reads sectors from the disk. If EDD is enabled, then check if it is -# installed and use it if it is. If it is not installed or not enabled, then -# fall back to using CHS. Since we use a LBA, if we are using CHS, we have to -# fetch the drive parameters from the BIOS and divide it out ourselves. -# Call with: -# -# %dl - byte - drive number -# stack - 10 bytes - EDD Packet -# -read: push %dx # Save - movb $0x8,%ah # BIOS: Get drive - int $0x13 # parameters - movb %dh,%ch # Max head number - pop %dx # Restore - jc return # If error - andb $0x3f,%cl # Sectors per track - jz ereturn # If zero - cli # Disable interrupts - mov 0x8(%bp),%eax # Get LBA - push %dx # Save - movzbl %cl,%ebx # Divide by - xor %edx,%edx # sectors - div %ebx # per track - movb %ch,%bl # Max head number - movb %dl,%ch # Sector number - inc %bx # Divide by - xorb %dl,%dl # number - div %ebx # of heads - movb %dl,%bh # Head number - pop %dx # Restore - cmpl $0x3ff,%eax # Cylinder number supportable? - sti # Enable interrupts - ja read.7 # No, try EDD - xchgb %al,%ah # Set up cylinder - rorb $0x2,%al # number - orb %ch,%al # Merge - inc %ax # sector - xchg %ax,%cx # number - movb %bh,%dh # Head number - subb %ah,%al # Sectors this track - mov 0x2(%bp),%ah # Blocks to read - cmpb %ah,%al # To read - jb read.2 # this - movb %ah,%al # track -read.2: mov $0x5,%di # Try count -read.3: les 0x4(%bp),%bx # Transfer buffer - push %ax # Save - movb $0x2,%ah # BIOS: Read - int $0x13 # from disk - pop %bx # Restore - jnc read.4 # If success - dec %di # Retry? - jz read.6 # No - xorb %ah,%ah # BIOS: Reset - int $0x13 # disk system - xchg %bx,%ax # Block count - jmp read.3 # Continue -read.4: movzbw %bl,%ax # Sectors read - add %ax,0x8(%bp) # Adjust - jnc read.5 # LBA, - incw 0xa(%bp) # transfer -read.5: shlb %bl # buffer - add %bl,0x5(%bp) # pointer, - sub %al,0x2(%bp) # block count - ja read # If not done -read.6: retw # To caller -read.7: testb $FL_PACKET,%cs:MEM_REL+flags-start # LBA support enabled? - jz ereturn # No, so return an error - mov $0x55aa,%bx # Magic - push %dx # Save - movb $0x41,%ah # BIOS: Check - int $0x13 # extensions present - pop %dx # Restore - jc return # If error, return an error - cmp $0xaa55,%bx # Magic? - jne ereturn # No, so return an error - testb $0x1,%cl # Packet interface? - jz ereturn # No, so return an error - mov %bp,%si # Disk packet - movb $0x42,%ah # BIOS: Extended - int $0x13 # read - retw # To caller +// +// Overused return code. ereturn is used to return an error from the +// read function. Since we assume putstr succeeds, we (ab)use the +// same code when we return from putstr. +// +ereturn: movb $0x1,%ah // Invalid + stc // argument +return: retw // To caller +// +// Reads sectors from the disk. If EDD is enabled, then check if it is +// installed and use it if it is. If it is not installed or not enabled, then +// fall back to using CHS. Since we use a LBA, if we are using CHS, we have to +// fetch the drive parameters from the BIOS and divide it out ourselves. +// Call with: +// +// %dl - byte - drive number +// stack - 10 bytes - EDD Packet +// +read: push %dx // Save + movb $0x8,%ah // BIOS: Get drive + int $0x13 // parameters + movb %dh,%ch // Max head number + pop %dx // Restore + jc return // If error + andb $0x3f,%cl // Sectors per track + jz ereturn // If zero + cli // Disable interrupts + mov 0x8(%bp),%eax // Get LBA + push %dx // Save + movzbl %cl,%ebx // Divide by + xor %edx,%edx // sectors + div %ebx // per track + movb %ch,%bl // Max head number + movb %dl,%ch // Sector number + inc %bx // Divide by + xorb %dl,%dl // number + div %ebx // of heads + movb %dl,%bh // Head number + pop %dx // Restore + cmpl $0x3ff,%eax // Cylinder number supportable? + sti // Enable interrupts + ja read.7 // No, try EDD + xchgb %al,%ah // Set up cylinder + rorb $0x2,%al // number + orb %ch,%al // Merge + inc %ax // sector + xchg %ax,%cx // number + movb %bh,%dh // Head number + subb %ah,%al // Sectors this track + mov 0x2(%bp),%ah // Blocks to read + cmpb %ah,%al // To read + jb read.2 // this + movb %ah,%al // track +read.2: mov $0x5,%di // Try count +read.3: les 0x4(%bp),%bx // Transfer buffer + push %ax // Save + movb $0x2,%ah // BIOS: Read + int $0x13 // from disk + pop %bx // Restore + jnc read.4 // If success + dec %di // Retry? + jz read.6 // No + xorb %ah,%ah // BIOS: Reset + int $0x13 // disk system + xchg %bx,%ax // Block count + jmp read.3 // Continue +read.4: movzbw %bl,%ax // Sectors read + add %ax,0x8(%bp) // Adjust + jnc read.5 // LBA, + incw 0xa(%bp) // transfer +read.5: shlb %bl // buffer + add %bl,0x5(%bp) // pointer, + sub %al,0x2(%bp) // block count + ja read // If not done +read.6: retw // To caller +read.7: testb $FL_PACKET,%cs:MEM_REL+flags-start // LBA support enabled? + jz ereturn // No, so return an error + mov $0x55aa,%bx // Magic + push %dx // Save + movb $0x41,%ah // BIOS: Check + int $0x13 // extensions present + pop %dx // Restore + jc return // If error, return an error + cmp $0xaa55,%bx // Magic? + jne ereturn // No, so return an error + testb $0x1,%cl // Packet interface? + jz ereturn // No, so return an error + mov %bp,%si // Disk packet + movb $0x42,%ah // BIOS: Extended + int $0x13 // read + retw // To caller -# Messages +// Messages msg_read: .asciz "Read" msg_part: .asciz "Boot" prompt: .asciz " error\r\n" -flags: .byte FLAGS # Flags +flags: .byte FLAGS // Flags .org PRT_OFF,0x90 -# Partition table +// Partition table .fill 0x30,0x1,0x0 part4: .byte 0x80, 0x00, 0x01, 0x00 .byte 0xa5, 0xfe, 0xff, 0xff .byte 0x00, 0x00, 0x00, 0x00 - .byte 0x50, 0xc3, 0x00, 0x00 # 50000 sectors long, bleh + .byte 0x50, 0xc3, 0x00, 0x00 // 50000 sectors long, bleh - .word 0xaa55 # Magic number + .word 0xaa55 // Magic number diff --git a/sys/boot/i386/gptboot/Makefile b/sys/boot/i386/gptboot/Makefile index e4ab3f5ddbf1..4526d15b300f 100644 --- a/sys/boot/i386/gptboot/Makefile +++ b/sys/boot/i386/gptboot/Makefile @@ -49,7 +49,8 @@ boot1.out: boot1.o ${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} boot1.o boot1.o: boot1.s - ${AS} ${AFLAGS} --defsym FLAGS=${B1FLAGS} ${.IMPSRC} -o ${.TARGET} + ${CPP} ${CFLAGS} ${.IMPSRC} | \ + ${AS} ${AFLAGS} --defsym FLAGS=${B1FLAGS} -o ${.TARGET} boot2.o: boot2.c ${.CURDIR}/../../common/ufsread.c ${CC} ${CFLAGS} -S -o boot2.s.tmp ${.IMPSRC}