wok rev 23867

syslinux/bootiso.S: merge isolinux boot sector
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sat Jun 20 14:15:09 2020 +0000 (2020-06-20)
parents 50eb3433cb74
children 9096d6788292
files linld/stuff/src/ISO9660.CPP syslinux/stuff/iso2exe/bootiso.S syslinux/stuff/iso2exe/iso2exe.sh
line diff
     1.1 --- a/linld/stuff/src/ISO9660.CPP	Fri Jun 19 20:32:02 2020 -0400
     1.2 +++ b/linld/stuff/src/ISO9660.CPP	Sat Jun 20 14:15:09 2020 +0000
     1.3 @@ -84,10 +84,15 @@
     1.4  		}
     1.5  		p += len;
     1.6  	} while (x->buffer + x->curpos + x->entrysize - 2 > p);
     1.7 +#ifdef ISOHOOK
     1.8 +	*endname = 0;
     1.9 +#else
    1.10  	if (endname)
    1.11  		*endname = 0;
    1.12  	else
    1.13  #endif
    1.14 +#endif
    1.15 +#ifndef ISOHOOK
    1.16  	{
    1.17  		p = x->buffer + 33; x->filename = p += x->curpos;
    1.18  		p--;
    1.19 @@ -105,6 +110,7 @@
    1.20  			*p = 0;
    1.21  		}
    1.22  	}
    1.23 +#endif
    1.24  	x->curpos += x->entrysize;
    1.25  	return 0;
    1.26  }
     2.1 --- a/syslinux/stuff/iso2exe/bootiso.S	Fri Jun 19 20:32:02 2020 -0400
     2.2 +++ b/syslinux/stuff/iso2exe/bootiso.S	Sat Jun 20 14:15:09 2020 +0000
     2.3 @@ -36,6 +36,7 @@
     2.4  start0:
     2.5  	//pushw	%dx			// restore %sp
     2.6  	//incw	%bp			// restore %bp
     2.7 +	movw	%ds, %ax
     2.8  	xorw	%bx, %bx
     2.9  	movw	%bx, %ds
    2.10  	movb	$0x7C, %bh
    2.11 @@ -45,10 +46,8 @@
    2.12  	pushw	%bx			// return address
    2.13  	pushw	%di
    2.14  	pushw	%es			// save %es:%di
    2.15 +	pushw	%si
    2.16  	cld
    2.17 -	sti
    2.18 -	pushw	%ds
    2.19 -	popw	%es
    2.20  	call	setreg
    2.21  	rep
    2.22  	  movsw
    2.23 @@ -63,8 +62,10 @@
    2.24  	.word	0
    2.25  	
    2.26  	.org	66
    2.27 +start2:
    2.28 +	pushw	%ax			// original %ds
    2.29 +	sti
    2.30  dxloop:
    2.31 -start2:
    2.32  	call	readsector1		// look for the boot device
    2.33  	repe
    2.34  	cmpsw
    2.35 @@ -76,8 +77,11 @@
    2.36  dxfound:
    2.37  	call	readsectorX		// read isolinux boot sector
    2.38  	cmpw	(%bx), %cx
    2.39 +	movw	$moved+nobsmsg, %si
    2.40  	jnc	puts			// read fail or no isohydrid boot sector
    2.41  	call	bootpartition		// assume DS=SS SI=BX=7C00 CX=0100 DL=<drive> DI=table+66
    2.42 +	popw	%ds
    2.43 +	popw	%si
    2.44  	popw	%es
    2.45  	popw	%di			// isolinux boot needs %es:%di and %dx
    2.46  putsret:
    2.47 @@ -87,15 +91,10 @@
    2.48  	movw	$7, %bx
    2.49  	movb	$0xE, %ah
    2.50  	int	$0x10
    2.51 -error:
    2.52 +puts:
    2.53  	lodsb
    2.54 -	cmp	$1, %al
    2.55 -	jg	putstrlp
    2.56 -	jz	putsret
    2.57 -puts:
    2.58 -	movb	$0x80, %ah
    2.59 -	xchgw	%ax, %si
    2.60 -	jnc	error
    2.61 +	cmp	$0, %al
    2.62 +	jnz	putstrlp
    2.63  halt:
    2.64  	hlt
    2.65  	jmp	halt
    2.66 @@ -134,7 +133,7 @@
    2.67  
    2.68  	.org	0x01A0,0xFF
    2.69  readsectorX:				// read isolinux boot sector
    2.70 -	movb	$0xA5, %cl		// patched by installer
    2.71 +	movb	$3, %cl			// isolinux/512
    2.72  readsector1:
    2.73  	andb	$0x83, %dl		// disk and floppy disk
    2.74  	movw	%cx, (%bx)
    2.75 @@ -142,10 +141,11 @@
    2.76  	movw	$0x201, %ax
    2.77  	int	$0x13
    2.78  setreg:
    2.79 +	pushw	%ds
    2.80 +	popw	%es
    2.81  	movw	%bx, %si
    2.82  	movw	$moved, %di
    2.83  	movw	$0x0100, %cx
    2.84 -	movb	$nobsmsg, %al
    2.85  	ret
    2.86  	.org	0x01B8,0xEE		// partition table
    2.87  
    2.88 @@ -370,6 +370,254 @@
    2.89  	
    2.90  	.org	0x0400,0xEE
    2.91  	.org	0x0600,0xFF
    2.92 +isolinux:
    2.93 +	.arch	i486
    2.94 +/* -----------------------------------------------------------------------
    2.95 + *
    2.96 + *   Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
    2.97 + *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
    2.98 + *
    2.99 + *   Permission is hereby granted, free of charge, to any person
   2.100 + *   obtaining a copy of this software and associated documentation
   2.101 + *   files (the "Software"), to deal in the Software without
   2.102 + *   restriction, including without limitation the rights to use,
   2.103 + *   copy, modify, merge, publish, distribute, sublicense, and/or
   2.104 + *   sell copies of the Software, and to permit persons to whom
   2.105 + *   the Software is furnished to do so, subject to the following
   2.106 + *   conditions:
   2.107 + *
   2.108 + *   The above copyright notice and this permission notice shall
   2.109 + *   be included in all copies or substantial portions of the Software.
   2.110 + *
   2.111 + *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   2.112 + *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   2.113 + *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   2.114 + *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
   2.115 + *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   2.116 + *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   2.117 + *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   2.118 + *   OTHER DEALINGS IN THE SOFTWARE.
   2.119 + *
   2.120 + * ----------------------------------------------------------------------- */
   2.121 +
   2.122 +HYBRID_MAGIC			= 0x7078c0fb
   2.123 +isolinux_hybrid_signature	= 0x7c00+64
   2.124 +isolinux_start_hybrid		= 0x7c00+64+4
   2.125 +
   2.126 +stack		= 0x7c00
   2.127 +partoffset	= (stack-8)
   2.128 +driveno		= (stack-14)
   2.129 +heads		= (stack-16)
   2.130 +sectors		= (stack-18)
   2.131 +ebios_flag	= (stack-20)
   2.132 +secpercyl	= (stack-24)
   2.133 +
   2.134 +BIOS_kbdflags	= 0x417
   2.135 +BIOS_page	= 0x462
   2.136 +
   2.137 +_start2:
   2.138 +	.byte	0x33, 0xed	/* xorw	%bp, %bp */
   2.139 +
   2.140 +	/* Check to see if we have a partition table entry */
   2.141 +	xorl	%ebx, %ebx
   2.142 +	xorl	%ecx, %ecx
   2.143 +#ifdef PARTITION_SUPPORT
   2.144 +	andw	%si, %si		/* %si == 0 -> no partition data */
   2.145 +	jz	1f
   2.146 +	testb	$0x7f, (%si)		/* Invalid active flag field? */
   2.147 +	jnz	1f
   2.148 +	cmpb	%cl, 4(%si)		/* Partition type zero == invalid? */
   2.149 +	je	1f
   2.150 +	cmpl	$0x58504721, %eax	/* !GPT signature in EAX? */
   2.151 +	jne	2f
   2.152 +	cmpb	$0xed, 4(%si)		/* EFI partition type? */
   2.153 +	jne	2f
   2.154 +	
   2.155 +	/* We have GPT partition information */
   2.156 +	movl	(32+20)(%si), %ecx
   2.157 +	movl	(36+20)(%si), %ebx
   2.158 +	jmp	1f
   2.159 +
   2.160 +	/* We have non-GPT partition information */
   2.161 +2:
   2.162 +	movl	8(%si), %ecx
   2.163 +#endif
   2.164 +1:
   2.165 +	movw	%sp, %si
   2.166 +
   2.167 +	/* We have no partition information */
   2.168 +	pushl	%ebx			/*  -4: partoffset_hi */
   2.169 +	pushl	%ecx			/*  -8: partoffset_lo */
   2.170 +	pushw	%es			/* -10: es:di -> $PnP header */
   2.171 +	pushw	%di			/* -12: es:di -> $PnP header */
   2.172 +
   2.173 +	movw	%bp, %ds
   2.174 +	movw	%bp, %es
   2.175 +	
   2.176 +	//ADJUST_DRIVE
   2.177 +	pushw	%dx			/* -14: dl -> drive number */
   2.178 +
   2.179 +	/* Copy down to 0:0x600 */
   2.180 +	movw	$0x7c00, %si
   2.181 +	movw	$_start2, %di
   2.182 +	movw	$(512/2), %cx
   2.183 +	rep; movsw
   2.184 +
   2.185 +	ljmpw	$0, $2f
   2.186 +2:
   2.187 +
   2.188 +	/* Check to see if we have EBIOS */
   2.189 +	pushw	%dx		/* drive number */
   2.190 +	movb	$0x41, %ah	/* %al == 0 already */
   2.191 +	movw	$0x55aa, %bx
   2.192 +	xorw	%cx, %cx
   2.193 +	xorb	%dh, %dh
   2.194 +	stc
   2.195 +	int	$0x13
   2.196 +	jc	1f
   2.197 +	cmpw	$0xaa55, %bx
   2.198 +	jne	1f
   2.199 +	andw	$1,%cx		/* Bit 0 = fixed disk subset */
   2.200 +	jz	1f
   2.201 +
   2.202 +	/* We have EBIOS; patch in the following code at
   2.203 +	   read_sector_cbios: movb $0x42, %ah ;  jmp read_common */
   2.204 +	movl	$0xeb42b4+((read_common-read_sector_cbios-4) << 24), \
   2.205 +		(read_sector_cbios)
   2.206 +	jmp	2f
   2.207 +1:
   2.208 +	xor	%cx, %cx	/* Clear EBIOS flag. */
   2.209 +2:
   2.210 +	popw	%dx
   2.211 +	pushw	%cx		/* EBIOS flag */
   2.212 +
   2.213 +	/* Get (C)HS geometry */
   2.214 +	movb	$0x08, %ah
   2.215 +	int	$0x13
   2.216 +	popw	%bx		/* EBIOS flag */
   2.217 +	movzbw	%dh, %ax	/* dh = max head */
   2.218 +	incw	%ax		/* From 0-based max to count */
   2.219 +	pushw	%ax		/* -16: Save heads on the stack */
   2.220 +	andw	$0x3f, %cx	/* Sector count */
   2.221 +	pushw	%cx		/* -18: Save sectors on the stack */
   2.222 +	mulw	%cx		/* Heads*sectors -> sectors per cylinder */
   2.223 +
   2.224 +	pushw	%bx		/* -20: EBIOS flag */
   2.225 +	
   2.226 +	/* Save sectors/cylinder on the stack */
   2.227 +	pushw	%dx		/* -22: High word */
   2.228 +	pushw	%ax		/* -24: Low word */
   2.229 +
   2.230 +	/*
   2.231 +	 * Load sectors.  We do this one at a time mostly to avoid
   2.232 +	 * pitfalls and to share code with the stock MBR code.
   2.233 +	 */
   2.234 +	movw	$0x7c00, %bx
   2.235 +	xorl	%eax, %eax
   2.236 +	movb	$17*4, %al	/* EL TORITO spec */
   2.237 +	call	read_sector
   2.238 +	jc	disk_error
   2.239 +	movl	71(%bx), %eax	/* catalog */
   2.240 +	shll	$2, %eax
   2.241 +	call	read_sector
   2.242 +	jc	disk_error
   2.243 +	movl	40(%bx), %eax	/* boot code */
   2.244 +	shll	$2, %eax
   2.245 +	movw	$4, %cx		/* Sector count */
   2.246 +
   2.247 +2:
   2.248 +	call	read_sector
   2.249 +	jc	disk_error
   2.250 +	incl	%eax
   2.251 +	addb	$(512 >> 8), %bh
   2.252 +	loopw	2b
   2.253 +
   2.254 +	/*
   2.255 +	 * Okay, that actually worked... update the stack pointer
   2.256 +	 * and jump into isolinux.bin...
   2.257 +	 */
   2.258 +	cmpl	$HYBRID_MAGIC,(isolinux_hybrid_signature)
   2.259 +	jne	bad_signature
   2.260 +
   2.261 +	cli
   2.262 +	movw	$ebios_flag, %sp
   2.263 +
   2.264 +	/*
   2.265 +	 * Use a ljmpw here to work around a bug in some unknown version
   2.266 +	 * of gas or ld when it comes to jumping to an absolute symbol...
   2.267 +	 *
   2.268 +	 * Look more closely into it if we ever are short on space.
   2.269 +	 */
   2.270 +	ljmpw	$0, $isolinux_start_hybrid
   2.271 +
   2.272 +bad_signature:
   2.273 +	call	error
   2.274 +	.ascii	"isolinux.bin missing or corrupt.\r\n"
   2.275 +
   2.276 +disk_error:
   2.277 +	call	error
   2.278 +	.ascii	"Operating system load error.\r\n"
   2.279 +
   2.280 +/*
   2.281 + * read_sector: read a single sector pointed to by %eax to %es:%bx.
   2.282 + * CF is set on error.  All registers saved.
   2.283 + */
   2.284 +read_sector:
   2.285 +	pushal
   2.286 +	xorl	%edx, %edx
   2.287 +#ifdef PARTITION_SUPPORT
   2.288 +	addl	(partoffset), %eax
   2.289 +	adcl	(partoffset+4), %edx
   2.290 +#endif
   2.291 +	pushl	%edx	/* MSW of LBA */
   2.292 +	pushl	%eax	/* LSW of LBA */
   2.293 +	pushw	%es	/* Buffer segment */
   2.294 +	pushw	%bx	/* Buffer offset */
   2.295 +	pushw	$1	/* Sector count */
   2.296 +	pushw	$16	/* Size of packet */
   2.297 +	movw	%sp, %si
   2.298 +
   2.299 +	/* This chunk is skipped if we have ebios */
   2.300 +	/* Do not clobber %eax before this chunk! */
   2.301 +	/* This also relies on %bx and %edx as set up above. */
   2.302 +read_sector_cbios:
   2.303 +	divl	(secpercyl)
   2.304 +	shlb	$6, %ah
   2.305 +	movb	%ah, %cl
   2.306 +	movb	%al, %ch
   2.307 +	xchgw	%dx, %ax
   2.308 +	divb	(sectors)
   2.309 +	movb	%al, %dh
   2.310 +	orb	%ah, %cl
   2.311 +	incw	%cx	/* Sectors are 1-based */
   2.312 +	movw	$0x0201, %ax
   2.313 +
   2.314 +read_common:
   2.315 +	movb	(driveno), %dl
   2.316 +	int	$0x13
   2.317 +	leaw	16(%si), %sp	/* Drop DAPA */
   2.318 +	popal
   2.319 +	ret
   2.320 +
   2.321 +/*
   2.322 + * Print error messages.  This is invoked with "call", with the
   2.323 + * error message at the return address.
   2.324 + */
   2.325 +error:
   2.326 +	popw	%si
   2.327 +2:
   2.328 +	lodsb
   2.329 +	movb	$0x0e, %ah
   2.330 +	movb	(BIOS_page), %bh
   2.331 +	movb	$0x07, %bl
   2.332 +	int	$0x10		/* May destroy %bp */
   2.333 +	cmpb	$10, %al	/* Newline? */
   2.334 +	jne	2b
   2.335 +
   2.336 +	int	$0x18		/* Boot failure */
   2.337 +die:
   2.338 +	hlt
   2.339 +	jmp	die
   2.340  	.org	0x0750,0xBB
   2.341  stopmsg:
   2.342  	.ascii	"This program cannot be run in DOS mode.$"
     3.1 --- a/syslinux/stuff/iso2exe/iso2exe.sh	Fri Jun 19 20:32:02 2020 -0400
     3.2 +++ b/syslinux/stuff/iso2exe/iso2exe.sh	Sat Jun 20 14:15:09 2020 +0000
     3.3 @@ -100,13 +100,10 @@
     3.4  0000 0080
     3.5  0178 0040
     3.6  0270 0190
     3.7 -0750 0028
     3.8 +0600 0178
     3.9  EOT
    3.10  	i=$((0x600))
    3.11 -	store 417 $(($i/512)) $1 8		### isolinux boot sector
    3.12 -	printf "Moving syslinux hybrid boot record at %04X (336 bytes) ...\n" $i
    3.13  	OFS=$SIZE
    3.14 -	ddn if=$2 bs=1 count=336 of=$1 seek=$i
    3.15  	rm -f /tmp/exe$$ /tmp/coff$$
    3.16  	if [ -z "$RECURSIVE_PARTITION" -a $(get 454 $1 4) -eq 0 ]; then
    3.17  		store 448 $((1+$i/512)) $1 8			### 446+2 SECTOR