From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40180) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQIDM-0004Ip-Q7 for qemu-devel@nongnu.org; Wed, 28 Jun 2017 15:01:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dQIDK-0007yt-BD for qemu-devel@nongnu.org; Wed, 28 Jun 2017 15:01:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43336) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dQIDK-0007yg-4u for qemu-devel@nongnu.org; Wed, 28 Jun 2017 15:01:22 -0400 From: "Dr. David Alan Gilbert (git)" Date: Wed, 28 Jun 2017 20:00:21 +0100 Message-Id: <20170628190047.26159-4-dgilbert@redhat.com> In-Reply-To: <20170628190047.26159-1-dgilbert@redhat.com> References: <20170628190047.26159-1-dgilbert@redhat.com> Subject: [Qemu-devel] [RFC 03/29] qemu_ram_block_host_offset List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, a.perevalov@samsung.com, marcandre.lureau@redhat.com, maxime.coquelin@redhat.com, mst@redhat.com, quintela@redhat.com, peterx@redhat.com, lvivier@redhat.com, aarcange@redhat.com From: "Dr. David Alan Gilbert" Utility to give the offset of a host pointer within a RAMBlock (assuming we already know it's in that RAMBlock) Signed-off-by: Dr. David Alan Gilbert --- exec.c | 6 ++++++ include/exec/cpu-common.h | 1 + 2 files changed, 7 insertions(+) diff --git a/exec.c b/exec.c index 4e61226a16..a1499b9bee 100644 --- a/exec.c +++ b/exec.c @@ -2218,6 +2218,12 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr, return ramblock_ptr(block, addr); } +/* Return the offset of a hostpointer within a ramblock */ +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host) +{ + return (uint8_t *)host - (uint8_t *)rb->host; +} + /* * Translates a host ptr back to a RAMBlock, a ram_addr and an offset * in that RAMBlock. diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 4af179b543..fa1ec22d66 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -66,6 +66,7 @@ ram_addr_t qemu_ram_addr_from_host(void *ptr); RAMBlock *qemu_ram_block_by_name(const char *name); RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, ram_addr_t *offset); +ram_addr_t qemu_ram_block_host_offset(RAMBlock *rb, void *host); void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev); void qemu_ram_unset_idstr(RAMBlock *block); const char *qemu_ram_get_idstr(RAMBlock *rb); -- 2.13.0