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Gregory Herrero ea0eada456 recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64. 
Currently, if a section has a relocation to '_mcount' symbol, a new
__mcount_loc entry will be added whatever the relocation type is.
This is problematic when a relocation to '_mcount' is in the middle of a
section and is not a call for ftrace use.

Such relocation could be generated with below code for example:
    bool is_mcount(unsigned long addr)
    {
        return (target == (unsigned long) &_mcount);
    }

With this snippet of code, ftrace will try to patch the mcount location
generated by this code on module load and fail with:

    Call trace:
     ftrace_bug+0xa0/0x28c
     ftrace_process_locs+0x2f4/0x430
     ftrace_module_init+0x30/0x38
     load_module+0x14f0/0x1e78
     __do_sys_finit_module+0x100/0x11c
     __arm64_sys_finit_module+0x28/0x34
     el0_svc_common+0x88/0x194
     el0_svc_handler+0x38/0x8c
     el0_svc+0x8/0xc
    ---[ end trace d828d06b36ad9d59 ]---
    ftrace failed to modify
    [<ffffa2dbf3a3a41c>] 0xffffa2dbf3a3a41c
     actual:   66:a9:3c:90
    Initializing ftrace call sites
    ftrace record flags: 2000000
     (0)
    expected tramp: ffffa2dc6cf66724

So Limit the relocation type to R_AARCH64_CALL26 as in perl version of
recordmcount.

Fixes: af64d2aa87 ("ftrace: Add arm64 support to recordmcount")
Signed-off-by: Gregory Herrero <gregory.herrero@oracle.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20200717143338.19302-1-gregory.herrero@oracle.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2020-07-24 12:43:19 +01:00
..
atomic locking/atomics: Provide the arch_atomic_ interface to generic code 2020-06-25 08:23:22 -07:00
basic modpost,fixdep: Replace zero-length array with flexible-array 2020-05-26 00:03:16 +09:00
coccinelle net: remove newlines in NL_SET_ERR_MSG_MOD 2020-05-07 17:56:14 -07:00
dtc scripts/dtc: use pkg-config to include <yaml.h> in non-standard path 2020-06-08 13:14:00 -06:00
dummy-tools kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig 2020-04-09 00:13:45 +09:00
gcc-plugins Merge branch 'rwonce/rework' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux 2020-06-10 14:46:54 -07:00
gdb scripts/gdb: repair rb_first() and rb_last() 2020-05-07 19:27:20 -07:00
genksyms .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
kconfig kconfig: announce removal of 'kvmconfig' and 'xenconfig' shorthands 2020-05-26 00:02:32 +09:00
ksymoops
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mod Kbuild updates for v5.8 2020-06-06 12:00:25 -07:00
package kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2020-06-11 20:14:41 +09:00
selinux SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00
tracing
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.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Kbuild.include kbuild: improve cc-option to clean up all temporary files 2020-06-17 10:20:21 +09:00
Kconfig.include kconfig: unify cc-option and as-option 2020-06-17 10:38:42 +09:00
Lindent
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Makefile kbuild: remove -I$(srctree)/tools/include from scripts/Makefile 2020-04-09 00:13:45 +09:00
Makefile.asm-generic
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Makefile.build kbuild: update modules.order only when contained modules are updated 2020-06-03 13:22:17 +09:00
Makefile.clean kbuild: add infrastructure to build userspace programs 2020-05-17 18:52:01 +09:00
Makefile.dtbinst kbuild: refactor Makefile.dtbinst more 2020-03-25 10:19:43 +09:00
Makefile.extrawarn kbuild: Enable -Wtautological-compare 2020-04-09 00:13:45 +09:00
Makefile.gcc-plugins
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Makefile.headersinst
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Makefile.host kbuild: use -MMD instead of -MD to exclude system headers from dependency 2020-05-12 13:28:33 +09:00
Makefile.kasan
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Makefile.kcov
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Makefile.kcsan kcsan: Pass option tsan-instrument-read-before-write to Clang 2020-06-11 20:04:01 +02:00
Makefile.lib Kbuild updates for v5.8 (2nd) 2020-06-13 13:29:16 -07:00
Makefile.modfinal
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Makefile.modinst
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Makefile.modpost modpost: move -d option in scripts/Makefile.modpost 2020-06-06 23:38:13 +09:00
Makefile.modsign
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Makefile.package kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables 2020-06-11 20:14:41 +09:00
Makefile.ubsan ubsan: split "bounds" checker from other options 2020-04-07 10:43:44 -07:00
Makefile.userprogs kbuild: add infrastructure to build userspace programs 2020-05-17 18:52:01 +09:00
adjust_autoksyms.sh
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asn1_compiler.c
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bin2c.c
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bloat-o-meter
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bootgraph.pl
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bpf_helpers_doc.py bpf: Minor fixes to BPF helpers documentation 2020-05-11 21:20:53 +02:00
cc-can-link.sh
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check-sysctl-docs
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check_extable.sh
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checkincludes.pl
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checkkconfigsymbols.py
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checkpatch.pl The Kernel Concurrency Sanitizer (KCSAN) 2020-06-11 18:55:43 -07:00
checkstack.pl scripts/checkstack.pl: fix arm sp regex 2020-05-26 00:03:16 +09:00
checksyscalls.sh
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checkversion.pl
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clang-version.sh
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cleanfile
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cleanpatch
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coccicheck
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config scripts/config: allow colons in option strings for sed 2020-04-23 01:10:16 +09:00
const_structs.checkpatch
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decode_stacktrace.sh scripts/decode_stacktrace: warn when modpath is needed but is unset 2020-06-15 15:37:24 -07:00
decodecode scripts/decodecode: fix trapping instruction formatting 2020-05-07 19:27:20 -07:00
depmod.sh
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diffconfig
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documentation-file-ref-check scripts: documentation-file-ref-check: Add line break before exit 2020-04-15 15:13:13 -06:00
export_report.pl
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extract-cert.c
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extract-ikconfig
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extract-module-sig.pl
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extract-sys-certs.pl
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extract-vmlinux
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extract_xc3028.pl
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faddr2line
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file-size.sh
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find-unused-docs.sh
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gcc-goto.sh
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gcc-ld
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gcc-plugin.sh gcc-plugins: drop support for GCC <= 4.7 2020-04-09 00:13:45 +09:00
gcc-version.sh
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gcc-x86_32-has-stack-protector.sh
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gcc-x86_64-has-stack-protector.sh
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gen_autoksyms.sh
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gen_compile_commands.py
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gen_ksymdeps.sh
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get_abi.pl
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get_dvb_firmware
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get_maintainer.pl get_maintainer: fix unexpected behavior for path/to//file (double slashes) 2020-06-04 19:06:24 -07:00
gfp-translate
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headerdep.pl
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headers_check.pl
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headers_install.sh scripts: Fix typo in headers_install.sh 2020-06-17 10:44:55 +09:00
insert-sys-cert.c
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jobserver-exec
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kallsyms.c gcc-10 warnings: fix low-hanging fruit 2020-05-04 09:16:37 -07:00
kernel-doc Replace HTTP links with HTTPS ones: documentation 2020-06-08 09:30:19 -06:00
ld-version.sh
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leaking_addresses.pl
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link-vmlinux.sh Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2020-06-13 15:28:08 -07:00
makelst
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markup_oops.pl
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mkcompile_h kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro 2020-05-12 13:28:33 +09:00
mkmakefile
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mksysmap mksysmap: Fix the mismatch of '.L' symbols in System.map 2020-06-06 23:39:20 +09:00
mkuboot.sh
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module-common.lds
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modules-check.sh kbuild: make module name conflict fatal error 2020-05-26 00:03:16 +09:00
namespace.pl
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nsdeps
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objdiff
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parse-maintainers.pl parse-maintainers: Do not sort section content by default 2020-03-26 15:08:27 -07:00
patch-kernel
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profile2linkerlist.pl
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prune-kernel
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recordmcount.c recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64. 2020-07-24 12:43:19 +01:00
recordmcount.h recordmcount: support >64k sections 2020-06-16 21:21:00 -04:00
recordmcount.pl
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setlocalversion
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show_delta
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sign-file.c
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sorttable.c
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sorttable.h
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spdxcheck-test.sh
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spdxcheck.py
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spelling.txt scripts/spelling: add a few more typos 2020-06-10 19:14:17 -07:00
sphinx-pre-install scripts: sphinx-pre-install: change the output order 2020-04-28 12:52:52 -06:00
split-man.pl
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stackdelta
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stackusage
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subarch.include
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tags.sh
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tools-support-relr.sh
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unifdef.c
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ver_linux
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xen-hypercalls.sh
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xz_wrap.sh kbuild: add variables for compression tools 2020-06-06 23:42:01 +09:00