summaryrefslogtreecommitdiffstats
path: root/arch/x86/entry/vdso/extable.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/entry/vdso/extable.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/entry/vdso/extable.h')
-rw-r--r--arch/x86/entry/vdso/extable.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/x86/entry/vdso/extable.h b/arch/x86/entry/vdso/extable.h
new file mode 100644
index 000000000..b56f6b012
--- /dev/null
+++ b/arch/x86/entry/vdso/extable.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __VDSO_EXTABLE_H
+#define __VDSO_EXTABLE_H
+
+/*
+ * Inject exception fixup for vDSO code. Unlike normal exception fixup,
+ * vDSO uses a dedicated handler the addresses are relative to the overall
+ * exception table, not each individual entry.
+ */
+#ifdef __ASSEMBLY__
+#define _ASM_VDSO_EXTABLE_HANDLE(from, to) \
+ ASM_VDSO_EXTABLE_HANDLE from to
+
+.macro ASM_VDSO_EXTABLE_HANDLE from:req to:req
+ .pushsection __ex_table, "a"
+ .long (\from) - __ex_table
+ .long (\to) - __ex_table
+ .popsection
+.endm
+#else
+#define _ASM_VDSO_EXTABLE_HANDLE(from, to) \
+ ".pushsection __ex_table, \"a\"\n" \
+ ".long (" #from ") - __ex_table\n" \
+ ".long (" #to ") - __ex_table\n" \
+ ".popsection\n"
+#endif
+
+#endif /* __VDSO_EXTABLE_H */