From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756040AbYIPBy6 (ORCPT ); Mon, 15 Sep 2008 21:54:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753214AbYIPByu (ORCPT ); Mon, 15 Sep 2008 21:54:50 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:61085 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753192AbYIPByt (ORCPT ); Mon, 15 Sep 2008 21:54:49 -0400 X-IronPort-AV: E=Sophos;i="4.32,404,1217822400"; d="scan'208";a="59566752" Subject: [PATCH][kgdb][v3] Make mem access function weak in kgdb.c and kgdb.h From: sonic zhang To: Jason Wessel Cc: Linux Kernel , kgdb mailing list Content-Type: text/plain Date: Tue, 16 Sep 2008 09:49:29 +0800 Message-Id: <1221529769.15380.10.camel@eight.analog.com> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org L1 instruction memory and MMR memory on blackfin can not be accessed by common functions probe_kernel_read() and probe_kernel_write(). Blackfin asks for 2/4 byte align access to MMR memory and DMA access to L1 instruction memory. These functions need to be reimplemented in architecture specific kgdb.c. Update documentation and prototypes as well. Signed-off-by: Sonic Zhang --- include/linux/kgdb.h | 42 ++++++++++++++++++++++++++++++++++++++++-- kernel/kgdb.c | 6 +++--- 2 files changed, 43 insertions(+), 5 deletions(-) diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h index 8fdd3cb..cb8a3d6 100644 --- a/include/linux/kgdb.h +++ b/include/linux/kgdb.h @@ -267,8 +267,46 @@ extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops); extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops); extern int kgdb_hex2long(char **ptr, unsigned long *long_val); -extern int kgdb_mem2hex(char *mem, char *buf, int count); -extern int kgdb_hex2mem(char *buf, char *mem, int count); + +/** + * kgdb_mem2hex - (optional arch override) translate bin to hex chars + * @mem: source buffer + * @buf: target buffer + * @count: number of bytes in mem + * + * Architectures which do not support probe_kernel_(read|write), + * can make an alternate implementation of this function. + * This function safely reads memory into hex + * characters for use with the kgdb protocol. + */ +extern int __weak kgdb_mem2hex(char *mem, char *buf, int count); + +/** + * kgdb_hex2mem - (optional arch override) translate hex chars to bin + * @buf: source buffer + * @mem: target buffer + * @count: number of bytes in mem + * + * Architectures which do not support probe_kernel_(read|write), + * can make an alternate implementation of this function. + * This function safely writes hex characters into memory + * for use with the kgdb protocol. + */ +extern int __weak kgdb_hex2mem(char *buf, char *mem, int count); + +/** + * kgdb_ebin2mem - (optional arch override) Copy the binary array + * pointed to by buf into mem. + * @buf: source buffer + * @mem: target buffer + * @count: number of bytes in mem + * + * Architectures which do not support probe_kernel_(read|write), + * can make an alternate implementation of this function. + * This function safely copies binary array into memory + * for use with the kgdb protocol. + */ +extern int __weak kgdb_ebin2mem(char *buf, char *mem, int count); extern int kgdb_isremovedbreak(unsigned long addr); diff --git a/kernel/kgdb.c b/kernel/kgdb.c index c803730..aae578e 100644 --- a/kernel/kgdb.c +++ b/kernel/kgdb.c @@ -364,7 +364,7 @@ static void put_packet(char *buffer) * Convert the memory pointed to by mem into hex, placing result in buf. * Return a pointer to the last char put in buf (null). May return an error. */ -int kgdb_mem2hex(char *mem, char *buf, int count) +int __weak kgdb_mem2hex(char *mem, char *buf, int count) { char *tmp; int err; @@ -394,7 +394,7 @@ int kgdb_mem2hex(char *mem, char *buf, int count) * 0x7d escaped with 0x7d. Return a pointer to the character after * the last byte written. */ -static int kgdb_ebin2mem(char *buf, char *mem, int count) +int __weak kgdb_ebin2mem(char *buf, char *mem, int count) { int err = 0; char c; @@ -419,7 +419,7 @@ static int kgdb_ebin2mem(char *buf, char *mem, int count) * Return a pointer to the character AFTER the last byte written. * May return an error. */ -int kgdb_hex2mem(char *buf, char *mem, int count) +int __weak kgdb_hex2mem(char *buf, char *mem, int count) { char *tmp_raw; char *tmp_hex; -- 1.6.0