50 lines
1.6 KiB
Diff
50 lines
1.6 KiB
Diff
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From c74f375e0ef7cd9b593fa1d73c47505822c8f2a0 Mon Sep 17 00:00:00 2001
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From: Kazuhito Hagio <k-hagio-ab@nec.com>
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Date: Mon, 24 Jul 2023 17:25:12 +0900
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Subject: [PATCH 22/30] Fix get_linux_banner_from_vmlinux() for vmlinux without
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".rodata" symbol
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As written in the previous patch, some recent kernels do not have the
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".rodata" symbol. As a result, the get_linux_banner_from_vmlinux()
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returns FALSE and the slower fallback routine is used.
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Use "__start_rodata" symbol if the ".rodata" symbol is not available.
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Signed-off-by: Kazuhito Hagio <k-hagio-ab@nec.com>
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Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
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---
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kernel.c | 9 +++++++--
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1 file changed, 7 insertions(+), 2 deletions(-)
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diff --git a/kernel.c b/kernel.c
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index 9801812387bd..2114700eecc8 100644
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--- a/kernel.c
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+++ b/kernel.c
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@@ -11891,8 +11891,13 @@ int get_linux_banner_from_vmlinux(char *buf, size_t size)
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{
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struct bfd_section *sect;
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long offset;
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+ ulong start_rodata;
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- if (!kernel_symbol_exists(".rodata"))
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+ if (kernel_symbol_exists(".rodata"))
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+ start_rodata = symbol_value(".rodata");
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+ else if (kernel_symbol_exists("__start_rodata"))
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+ start_rodata = symbol_value("__start_rodata");
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+ else
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return FALSE;
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sect = bfd_get_section_by_name(st->bfd, ".rodata");
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@@ -11905,7 +11910,7 @@ int get_linux_banner_from_vmlinux(char *buf, size_t size)
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* value in vmlinux file, but relative offset to linux_banner
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* object in .rodata section is idential.
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*/
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- offset = symbol_value("linux_banner") - symbol_value(".rodata");
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+ offset = symbol_value("linux_banner") - start_rodata;
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if (!bfd_get_section_contents(st->bfd,
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sect,
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--
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2.37.1
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