mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Clement Leger <cleger@kalray.eu>
To: Sascha Hauer <s.hauer@pengutronix.de>, barebox@lists.infradead.org
Cc: Clement Leger <cleger@kalray.eu>
Subject: [PATCH v3 1/7] common: elf: add computation of elf boundaries
Date: Tue, 28 Apr 2020 09:50:54 +0200	[thread overview]
Message-ID: <20200428075100.17565-2-cleger@kalray.eu> (raw)
In-Reply-To: <20200428075100.17565-1-cleger@kalray.eu>

In order to correctly load an initrd or a device tree after an elf file,
we need to know its boundaries. This commit adds support for that and
allow the bootm implementations to use it for memory loading.

Signed-off-by: Clement Leger <cleger@kalray.eu>
---
 common/elf.c  | 7 +++++++
 include/elf.h | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/common/elf.c b/common/elf.c
index 4733accb0..d64de401c 100644
--- a/common/elf.c
+++ b/common/elf.c
@@ -59,6 +59,11 @@ static int load_elf_phdr_segment(struct elf_image *elf, void *src,
 	if (!p_filesz)
 		return 0;
 
+	if (dst < elf->low_addr)
+		elf->low_addr = dst;
+	if (dst + p_memsz > elf->high_addr)
+		elf->high_addr = dst + p_memsz;
+
 	pr_debug("Loading phdr to 0x%p (%llu bytes)\n", dst, p_filesz);
 
 	ret = elf_request_region(elf, (resource_size_t)dst, p_filesz);
@@ -124,6 +129,8 @@ struct elf_image *elf_load_image(void *buf)
 	INIT_LIST_HEAD(&elf->list);
 
 	elf->buf = buf;
+	elf->low_addr = (void *) (unsigned long) -1;
+	elf->high_addr = 0;
 
 	ret = elf_check_image(elf);
 	if (ret)
diff --git a/include/elf.h b/include/elf.h
index 113728f08..403412f3f 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -403,9 +403,16 @@ struct elf_image {
 	struct list_head list;
 	u8 class;
 	u64 entry;
+	void *low_addr;
+	void *high_addr;
 	void *buf;
 };
 
+static inline size_t elf_get_mem_size(struct elf_image *elf)
+{
+	return elf->high_addr - elf->low_addr;
+}
+
 struct elf_image *elf_load_image(void *buf);
 void elf_release_image(struct elf_image *elf);
 
-- 
2.17.1


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  reply	other threads:[~2020-04-28  7:51 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-28  7:50 [PATCH v3 0/7] elf: add better bootm support Clement Leger
2020-04-28  7:50 ` Clement Leger [this message]
2020-04-28  7:50 ` [PATCH v3 2/7] common: elf: fix warning on 32 bits architectures Clement Leger
2020-04-28  7:50 ` [PATCH v3 3/7] common: elf: split init to be reused from other function Clement Leger
2020-04-28  7:50 ` [PATCH v3 4/7] common: elf: add elf_open, elf_close and elf_load Clement Leger
2020-04-28  7:50 ` [PATCH v3 5/7] common: bootm: add support for elf file loading Clement Leger
2020-04-28  7:50 ` [PATCH v3 6/7] mips: lib: bootm: use bootm elf loading capabilities Clement Leger
2020-04-28  7:51 ` [PATCH v3 7/7] common: elf: remove elf_load_image/elf_release_image Clement Leger
2020-04-29  8:34 ` [PATCH v3 0/7] elf: add better bootm support Oleksij Rempel
2020-04-29  8:55   ` Clément Leger

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200428075100.17565-2-cleger@kalray.eu \
    --to=cleger@kalray.eu \
    --cc=barebox@lists.infradead.org \
    --cc=s.hauer@pengutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox