https://bugzilla.kernel.org/show_bug.cgi?id=217702
Bug ID: 217702
Summary: makedumpfile can not open /proc/vmcore
Product: Platform Specific/Hardware
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: PPC-64
Assignee: platform_ppc...@kernel-bugs.osdl.org
Reporter: pi...@redhat.com
Regression: No
This bug should be introduced by the
commit 606787fed7268feb256957872586370b56af697a
Author: Nicholas Piggin <npig...@gmail.com>
Date: Tue Jun 6 19:38:32 2023 +1000
powerpc/64s: Remove support for ELFv1 little endian userspace
ELFv2 was introduced together with little-endian. ELFv1 with LE has
never been a thing. The GNU toolchain can create such a beast, but
anyone doing that is a maniac who needs to be stopped so I consider
this patch a feature.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Link: https://msgid.link/20230606093832.199712-5-npig...@gmail.com
And can be workaround by the following draft patch:
diff --git a/arch/powerpc/kexec/file_load_64.c
b/arch/powerpc/kexec/file_load_64.c
index 110d28bede2a..6af49c90c4b2 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -782,6 +782,18 @@ static void update_backup_region_phdr(struct kimage
*image, Elf64_Ehdr *ehdr)
}
}
+/**
+ * 64le only supports ELFv2 64-bit binaries (64be supports v1 and v2).
+ */
+static inline void update_elfcorehdr_eflags(Elf64_Ehdr *ehdr)
+{
+#if defined(CONFIG_PPC64) && defined(CONFIG_CPU_LITTLE_ENDIAN)
+ ehdr->e_flags = 0x2;
+#endif
+}
+
+
+
/**
* load_elfcorehdr_segment - Setup crash memory ranges and initialize
elfcorehdr
* segment needed to load kdump kernel.
@@ -810,6 +822,7 @@ static int load_elfcorehdr_segment(struct kimage *image,
struct kexec_buf *kbuf)
/* Fix the offset for backup region in the ELF header */
update_backup_region_phdr(image, headers);
+ update_elfcorehdr_eflags(headers);
kbuf->buffer = headers;
kbuf->mem = KEXEC_BUF_MEM_UNKNOWN;
--
You may reply to this email to add a comment.
You are receiving this mail because:
You are watching the assignee of the bug.
