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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 1/6] common: elf: add computation of elf boundaries
Date: Wed, 22 Apr 2020 13:21:14 +0200	[thread overview]
Message-ID: <20200422112119.23181-2-cleger@kalray.eu> (raw)
In-Reply-To: <20200422112119.23181-1-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 | 2 ++
 2 files changed, 9 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..e4577f63c 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -403,6 +403,8 @@ struct elf_image {
 	struct list_head list;
 	u8 class;
 	u64 entry;
+	void *low_addr;
+	void *high_addr;
 	void *buf;
 };
 
-- 
2.17.1


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  reply	other threads:[~2020-04-22 11:21 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-22 11:21 [PATCH 0/6] elf: add better bootm support Clement Leger
2020-04-22 11:21 ` Clement Leger [this message]
2020-04-22 11:21 ` [PATCH 2/6] common: elf: fix warning on 32 bits architectures Clement Leger
2020-04-22 11:21 ` [PATCH 3/6] common: elf: split init to be reused from other function Clement Leger
2020-04-22 11:21 ` [PATCH 4/6] common: elf: add elf_open and elf_close Clement Leger
2020-04-23  6:56   ` Sascha Hauer
2020-04-22 11:21 ` [PATCH 5/6] common: bootm: add support for elf file loading Clement Leger
2020-04-23  6:50   ` Clément Leger
2020-04-23  7:04   ` Sascha Hauer
2020-04-22 11:21 ` [PATCH 6/6] mips: lib: bootm: use new data->elf member Clement Leger

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