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693c819fed
- Separate out the vdso sources into common, vdso32, and vdso64 directories. - Build the 32- and 64-bit vdsos in their respective subdirectories; this greatly simplifies the build flags handling. - Unify the mangling of Makefile flags between the 32- and 64-bit vdso code as much as possible; all common rules are put in arch/x86/entry/vdso/common/Makefile.include. The remaining is very simple for 32 bits; the 64-bit one is only slightly more complicated because it contains the x32 generation rule. - Define __DISABLE_EXPORTS when building the vdso. This need seems to have been masked by different ordering compile flags before. - Change CONFIG_X86_64 to BUILD_VDSO32_64 in vdso32/system_call.S, to make it compatible with including fake_32bit_build.h. - The -fcf-protection= option was "leaking" from the kernel build, for reasons that was not clear to me. Furthermore, several distributions ship with it set to a default value other than "-fcf-protection=none". Make it match the configuration options for *user space*. Note that this patch may seem large, but the vast majority of it is simply code movement. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://patch.msgid.link/20251216212606.1325678-4-hpa@zytor.com
19 lines
496 B
ArmAsm
19 lines
496 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
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* Here we can supply some information useful to userland.
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*/
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#include <linux/build-salt.h>
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#include <linux/version.h>
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#include <linux/elfnote.h>
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/* Ideally this would use UTS_NAME, but using a quoted string here
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doesn't work. Remember to change this when changing the
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kernel's name. */
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ELFNOTE_START(Linux, 0, "a")
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.long LINUX_VERSION_CODE
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ELFNOTE_END
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BUILD_SALT
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