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| author | Vasily Gorbik <gor@linux.ibm.com> | 2020-11-12 17:54:47 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-11-20 21:19:11 +0300 |
| commit | c9343637d6b265127dfe37cd7e09eb6feac03032 (patch) | |
| tree | 939af3da833da49e38d422644893064928ea377a /scripts | |
| parent | 73045a08cf5549cc7dee14463431fbeb2134dd67 (diff) | |
| download | linux-c9343637d6b265127dfe37cd7e09eb6feac03032.tar.xz | |
s390/ftrace: assume -mhotpatch or -mrecord-mcount always available
Currently the kernel minimal compiler requirement is gcc 4.9 or
clang 10.0.1.
* gcc -mhotpatch option is supported since 4.8.
* A combination of -pg -mrecord-mcount -mnop-mcount -mfentry flags is
supported since gcc 9 and since clang 10.
Drop support for old -pg function prologues. Which leaves binary
compatible -mhotpatch / -mnop-mcount -mfentry prologues in a form:
brcl 0,0
Which are also do not require initial nop optimization / conversion and
presence of _mcount symbol.
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/recordmcount.pl | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index 3f77a5d695c1..56c801502b9a 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -254,9 +254,6 @@ if ($arch eq "x86_64") { if ($cc =~ /-DCC_USING_HOTPATCH/) { $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*c0 04 00 00 00 00\\s*brcl\\s*0,[0-9a-f]+ <([^\+]*)>\$"; $mcount_adjust = 0; - } else { - $mcount_regex = "^\\s*([0-9a-fA-F]+):\\s*R_390_(PC|PLT)32DBL\\s+_mcount\\+0x2\$"; - $mcount_adjust = -14; } $alignment = 8; $type = ".quad"; |