Andrew Morton wrote:
On Wed, 2 May 2007 15:35:56 -0700
Randy Dunlap <[email protected]> wrote:
From: Randy Dunlap <[email protected]>
Based on ace_dump_mem() from Grant Likely for the Xilinx
SystemACE CompactFlash interface.
Add hex_dumper() to lib/hexdump.c and linux/kernel.h.
This patch adds the function 'hex_dumper' which can be used to perform a
hex + ASCII dump of data to syslog, in an easily viewable format, thus
providing a common text hex dump format.
It does not provide a hexdump_to_buffer() function.
if someone needs that, we'll have to add it.
Example usage:
hex_dumper(KERN_DEBUG, data, length);
Fair enough. This is the sort of thing one could easily overdesign ;)
The Intel version also returned the number of bytes printed.
and they had a hexdump_to_buffer() for sysfs output.
include/linux/kernel.h | 1
lib/Makefile | 2 -
lib/hexdump.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 53 insertions(+), 1 deletion(-)
--- /dev/null
+++ linux-2.6.21-git4/lib/hexdump.c
@@ -0,0 +1,51 @@
+/**
+ * hex_dumper - print a text hex dump to syslog for a binary blob of data
+ * @level: kernel log level (e.g. KERN_DEBUG)
+ * @buf: data blob to dump
+ * @len: number of bytes in the @buf
+ *
+ * Given a buffer of u8 data, hex_dumper() will print a hex + ASCII dump
+ * to the kernel log at the specified kernel log level.
+ *
+ * E.g.:
+ * hex_dumper(KERN_DEBUG, frame->data, frame->len);
+ *
+ * Prints the offsets of the block of memory, not addresses:
+ * 0009ab42: 40414243 44454647 48494a4b 4c4d4e4f-@ABCDEFG HIJKLMNO
But I suspect it should be printing the addresses, for many callers.
In which case we'd need a separate arg (base_address or somesuch) so that
callers who want to show real virtual addresses can pass in `base' and
callers who want to display relative offsets can pass in 0.
OK, that's one way to do it. I'll wait a bit for other comments.
Which implies that the address will need to be printed as a 16-digit number
on 64-bit kernels.
Yep.
--
~Randy
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