Revert previous at the moment.
This is wrong reasoning; 68020 and above (incl. 040 and 060) support
32-bit displacements for PC relative addressing (via "fully extension
addressing mode" with null index register).
I've still not figured out what goes wrong with amiga/boot(8) when
compiled without -l option for gas(1)...
On 2022/04/27 20:48, Rin Okuyama wrote:
> Module Name: src
> Committed By: rin
> Date: Wed Apr 27 11:48:26 UTC 2022
>
> Modified Files:
> src/sys/lib/libsa: ext2fs.c minixfs3.c stand.h ufs.c
>
> Log Message:
> Introduce SA_HARDCODED_SECSIZE hack, by which hardcoded DEV_BSIZE is
> used instead of secsize obtained by SAIOSECSIZE ioctl.
>
> This hack avoids divdi3 and friends from being linked, in order to
> support variable secsize.
>
> This is useful for amiga/boot(8); it is loaded by firmware into
> unpredictable address, and therefore all symbols should be
> addressable by PC relative mode with only 16-bit displacements.
>
> See sys/arch/amiga/stand/bootblock/{boot/bbstart.s,elf2bb,txlt} for
> more details.
>
>
> To generate a diff of this commit:
> cvs rdiff -u -r1.31 -r1.32 src/sys/lib/libsa/ext2fs.c
> cvs rdiff -u -r1.10 -r1.11 src/sys/lib/libsa/minixfs3.c
> cvs rdiff -u -r1.83 -r1.84 src/sys/lib/libsa/stand.h src/sys/lib/libsa/ufs.c
>
> Please note that diffs are not public domain; they are subject to the
> copyright notices on the relevant files.
This commit is contained in:
rin
parent
f178fcd4de
commit
7ca4ea5592
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@ -1,4 +1,4 @@
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/* $NetBSD: ext2fs.c,v 1.32 2022/04/27 11:48:26 rin Exp $ */
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/* $NetBSD: ext2fs.c,v 1.33 2022/04/27 14:48:50 rin Exp $ */
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/*
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* Copyright (c) 1997 Manuel Bouyer.
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@ -415,9 +415,15 @@ read_sblock(struct open_file *f, struct m_ext2fs *fs)
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struct ext2fs ext2fs;
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size_t buf_size;
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int rc;
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u_int secsize;
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secsize = 0;
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rc = DEV_IOCTL(f->f_dev)(f, SAIOSECSIZE, &secsize);
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if (rc != 0 || secsize == 0)
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secsize = DEV_BSIZE;
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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SBOFF / GETSECSIZE(f), SBSIZE, sbbuf, &buf_size);
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SBOFF / secsize, SBSIZE, sbbuf, &buf_size);
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if (rc)
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return rc;
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@ -1,4 +1,4 @@
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/* $NetBSD: minixfs3.c,v 1.11 2022/04/27 11:48:26 rin Exp $ */
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/* $NetBSD: minixfs3.c,v 1.12 2022/04/27 14:48:50 rin Exp $ */
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/*-
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* Copyright (c) 2012
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@ -449,6 +449,7 @@ read_sblock(struct open_file *f, struct mfs_sblock *fs)
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static uint8_t sbbuf[MINBSIZE];
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size_t buf_size;
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int rc;
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u_int secsize;
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/* We must read amount multiple of sector size, hence we can't
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* read SBSIZE and read MINBSIZE.
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@ -456,8 +457,13 @@ read_sblock(struct open_file *f, struct mfs_sblock *fs)
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if (SBSIZE > MINBSIZE)
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return EINVAL;
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secsize = 0;
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rc = DEV_IOCTL(f->f_dev)(f, SAIOSECSIZE, &secsize);
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if (rc != 0 || secsize == 0)
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secsize = DEV_BSIZE;
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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SUPER_BLOCK_OFF / GETSECSIZE(f), MINBSIZE, sbbuf, &buf_size);
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SUPER_BLOCK_OFF / secsize, MINBSIZE, sbbuf, &buf_size);
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if (rc)
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return rc;
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@ -1,4 +1,4 @@
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/* $NetBSD: stand.h,v 1.84 2022/04/27 11:48:26 rin Exp $ */
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/* $NetBSD: stand.h,v 1.85 2022/04/27 14:48:50 rin Exp $ */
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/*
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* Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
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@ -64,7 +64,6 @@
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#ifndef _LIBSA_STAND_H_
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#define _LIBSA_STAND_H_
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/cdefs.h>
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#include <sys/stat.h>
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@ -321,22 +320,4 @@ void bzero(void *, size_t);
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int atoi(const char *);
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#if !defined(SA_HARDCODED_SECSIZE)
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#define GETSECSIZE(f) getsecsize(f)
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static inline u_int
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getsecsize(struct open_file *f)
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{
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int rc;
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u_int secsize = 0;
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rc = DEV_IOCTL(f->f_dev)(f, SAIOSECSIZE, &secsize);
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if (rc != 0 || secsize == 0)
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secsize = DEV_BSIZE;
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return secsize;
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}
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#else
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#define GETSECSIZE(f) DEV_BSIZE
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#endif
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#endif /* _LIBSA_STAND_H_ */
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@ -1,4 +1,4 @@
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/* $NetBSD: ufs.c,v 1.84 2022/04/27 11:48:26 rin Exp $ */
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/* $NetBSD: ufs.c,v 1.85 2022/04/27 14:48:50 rin Exp $ */
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/*-
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* Copyright (c) 1993
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@ -594,15 +594,21 @@ ffs_find_superblock(struct open_file *f, FS *fs)
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struct file *fp = (struct file *)f->f_fsdata;
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int rc;
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size_t buf_size;
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u_int secsize;
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#ifdef LIBSA_FFSv2
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static daddr_t sblock_try[] = SBLOCKSEARCH;
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int i;
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#endif
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secsize = 0;
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rc = DEV_IOCTL(f->f_dev)(f, SAIOSECSIZE, &secsize);
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if (rc != 0 || secsize == 0)
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secsize = DEV_BSIZE;
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#ifdef LIBSA_FFSv2
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for (i = 0; sblock_try[i] != -1; i++) {
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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sblock_try[i] / GETSECSIZE(f), SBLOCKSIZE, fs, &buf_size);
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sblock_try[i] / secsize, SBLOCKSIZE, fs, &buf_size);
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if (rc)
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return rc;
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if (buf_size != SBLOCKSIZE)
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@ -617,7 +623,7 @@ ffs_find_superblock(struct open_file *f, FS *fs)
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return EINVAL;
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#else /* LIBSA_FFSv2 */
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rc = DEV_STRATEGY(f->f_dev)(f->f_devdata, F_READ,
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SBLOCKOFFSET / GETSECSIZE(f), SBLOCKSIZE, fs, &buf_size);
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SBLOCKOFFSET / secsize, SBLOCKSIZE, fs, &buf_size);
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if (rc)
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return rc;
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if (buf_size != SBLOCKSIZE)
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