SquashFS not compiling due to missing __udivdi3 and __umoddi3
Mauro Condarelli
mc5686 at mclink.it
Thu Sep 3 10:41:56 CEST 2020
Hi,
enabling squashfs on my target (vocore2) result in multiple errors:
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o: in function `sqfs_calc_n_blks':
> fs/squashfs/sqfs.c:(.text.sqfs_calc_n_blks+0x44): undefined reference to `__umoddi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/squashfs/sqfs.c:(.text.sqfs_calc_n_blks+0x98): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o: in function `sqfs_frag_lookup':
> fs/squashfs/sqfs.c:(.text.sqfs_frag_lookup+0x74): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/squashfs/sqfs.c:(.text.sqfs_frag_lookup+0x1b0): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o: in function `sqfs_opendir':
> (.text.sqfs_opendir+0xbc): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: (.text.sqfs_opendir+0x178): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o:(.text.sqfs_read+0x324): more undefined references to `__udivdi3' follow
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o: in function `sqfs_read':
> (.text.sqfs_read+0x348): undefined reference to `__umoddi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: (.text.sqfs_read+0x388): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: (.text.sqfs_read+0x5bc): undefined reference to `__umoddi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: (.text.sqfs_read+0x600): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: (.text.sqfs_read+0x64c): undefined reference to `__udivdi3'
> /home/mcon/vocore/__V2__/Buildroot-2/recov/per-package/uboot/host/bin/mipsel-linux-ld.bfd: fs/built-in.o: in function `sqfs_inode_size':
> (.text.sqfs_inode_size+0x140): undefined reference to `__udivdi3'
> make[2]: *** [Makefile:1753: u-boot] Error 1
> make[1]: *** [package/pkg-generic.mk:269: /home/mcon/vocore/__V2__/Buildroot-2/recov/build/uboot-v2020.10-rc3/.stamp_built] Error 2
> make: *** [Makefile:23: _all] Error 2
Following some advice on IRC (I can be contacted there as "mcon")
I tried to fix issue by explicit calling `lldiv()` (full patch below).
Fix allows full compilation, and is also somewhat working:
Directory list works, file load does not :(
> => ls mmc 0:6 /boot
> 0 not_mounted
> 2512916 uImage
>
> 2 file(s), 0 dir(s)
>
> => load mmc 0:6 85000000 /boot/uImage
> Failed to load '/boot/uImage'
Here I have two questions:
1) can someone check my patch end tell me where I goofed?
2) is this supposedly the right way to fix? One other suggestion I had
on IRC is to simply implement __udivdi3/__umoddi3 in my architecture
(i.e.: u-boot/arch/mips/lib), but that doesn't seem like what has been
done in other places. I would like to provide an upstreamable patch.
==8<--- Here comes the (tentative) patch==================================
>From cfd07aac0aa00345df1a0f2fac04ee549c78f87a Mon Sep 17 00:00:00 2001
From: Mauro Condarelli <mc5686 at mclink.it>
Date: Thu, 3 Sep 2020 08:37:58 +0200
Subject: [PATCH 4/4] Fix missing __udivdi3 in SquashFS implementation.
Signed-off-by: Mauro Condarelli <mc5686 at mclink.it>
---
fs/squashfs/sqfs.c | 27 ++++++++++++++++-----------
fs/squashfs/sqfs_inode.c | 11 +++++++++--
2 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index f67f7c4a40..12115b6baa 100644
--- a/fs/squashfs/sqfs.c
+++ b/fs/squashfs/sqfs.c
@@ -23,6 +23,12 @@
#include "sqfs_filesystem.h"
#include "sqfs_utils.h"
+#include <div64.h>
+#ifdef DIV_ROUND_UP
+#undef DIV_ROUND_UP
+#endif
+#define DIV_ROUND_UP(n,d) (lldiv(((n) + (d) - 1), (d)))
+
static struct squashfs_ctxt ctxt;
static int sqfs_disk_read(__u32 block, __u32 nr_blocks, void *buf)
@@ -85,7 +91,7 @@ static int sqfs_calc_n_blks(__le64 start, __le64 end, u64 *offset)
u64 start_, table_size;
table_size = le64_to_cpu(end) - le64_to_cpu(start);
- start_ = le64_to_cpu(start) / ctxt.cur_dev->blksz;
+ start_ = lldiv(le64_to_cpu(start), ctxt.cur_dev->blksz);
*offset = le64_to_cpu(start) - (start_ * ctxt.cur_dev->blksz);
return DIV_ROUND_UP(table_size + *offset, ctxt.cur_dev->blksz);
@@ -109,8 +115,8 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
if (inode_fragment_index >= get_unaligned_le32(&sblk->fragments))
return -EINVAL;
- start = get_unaligned_le64(&sblk->fragment_table_start) /
- ctxt.cur_dev->blksz;
+ start = lldiv(get_unaligned_le64(&sblk->fragment_table_start),
+ ctxt.cur_dev->blksz);
n_blks = sqfs_calc_n_blks(sblk->fragment_table_start,
sblk->export_table_start,
&table_offset);
@@ -135,7 +141,7 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
start_block = get_unaligned_le64(table + table_offset + block *
sizeof(u64));
- start = start_block / ctxt.cur_dev->blksz;
+ start = lldiv(start_block, ctxt.cur_dev->blksz);
n_blks = sqfs_calc_n_blks(cpu_to_le64(start_block),
sblk->fragment_table_start, &table_offset);
@@ -641,8 +647,8 @@ static int sqfs_read_inode_table(unsigned char **inode_table)
table_size = get_unaligned_le64(&sblk->directory_table_start) -
get_unaligned_le64(&sblk->inode_table_start);
- start = get_unaligned_le64(&sblk->inode_table_start) /
- ctxt.cur_dev->blksz;
+ start = lldiv(get_unaligned_le64(&sblk->inode_table_start),
+ ctxt.cur_dev->blksz);
n_blks = sqfs_calc_n_blks(sblk->inode_table_start,
sblk->directory_table_start, &table_offset);
@@ -725,8 +731,8 @@ static int sqfs_read_directory_table(unsigned char **dir_table, u32 **pos_list)
/* DIRECTORY TABLE */
table_size = get_unaligned_le64(&sblk->fragment_table_start) -
get_unaligned_le64(&sblk->directory_table_start);
- start = get_unaligned_le64(&sblk->directory_table_start) /
- ctxt.cur_dev->blksz;
+ start = lldiv(get_unaligned_le64(&sblk->directory_table_start),
+ ctxt.cur_dev->blksz);
n_blks = sqfs_calc_n_blks(sblk->directory_table_start,
sblk->fragment_table_start, &table_offset);
@@ -1328,7 +1333,7 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
}
for (j = 0; j < datablk_count; j++) {
- start = data_offset / ctxt.cur_dev->blksz;
+ start = lldiv(data_offset, ctxt.cur_dev->blksz);
table_size = SQFS_BLOCK_SIZE(finfo.blk_sizes[j]);
table_offset = data_offset - (start * ctxt.cur_dev->blksz);
n_blks = DIV_ROUND_UP(table_size + table_offset,
@@ -1382,7 +1387,7 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
goto free_buffer;
}
- start = frag_entry.start / ctxt.cur_dev->blksz;
+ start = lldiv(frag_entry.start, ctxt.cur_dev->blksz);
table_size = SQFS_BLOCK_SIZE(frag_entry.size);
table_offset = frag_entry.start - (start * ctxt.cur_dev->blksz);
n_blks = DIV_ROUND_UP(table_size + table_offset, ctxt.cur_dev->blksz);
diff --git a/fs/squashfs/sqfs_inode.c b/fs/squashfs/sqfs_inode.c
index 1387779a85..cfb2b8374c 100644
--- a/fs/squashfs/sqfs_inode.c
+++ b/fs/squashfs/sqfs_inode.c
@@ -16,6 +16,13 @@
#include "sqfs_filesystem.h"
#include "sqfs_utils.h"
+#include <div64.h>
+#ifdef DIV_ROUND_UP
+#undef DIV_ROUND_UP
+#endif
+#define DIV_ROUND_UP(n,d) (lldiv(((n) + (d) - 1), (d)))
+
+
int sqfs_inode_size(struct squashfs_base_inode *inode, u32 blk_size)
{
switch (get_unaligned_le16(&inode->inode_type)) {
@@ -30,7 +37,7 @@ int sqfs_inode_size(struct squashfs_base_inode *inode, u32 blk_size)
unsigned int blk_list_size;
if (SQFS_IS_FRAGMENTED(fragment))
- blk_list_size = file_size / blk_size;
+ blk_list_size = lldiv(file_size, blk_size);
else
blk_list_size = DIV_ROUND_UP(file_size, blk_size);
@@ -70,7 +77,7 @@ int sqfs_inode_size(struct squashfs_base_inode *inode, u32 blk_size)
if (fragment == 0xFFFFFFFF)
blk_list_size = DIV_ROUND_UP(file_size, blk_size);
else
- blk_list_size = file_size / blk_size;
+ blk_list_size = lldiv(file_size, blk_size);
return sizeof(*lreg) + blk_list_size * sizeof(u32);
}
--
2.25.1
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