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S390: Do not clobber R0 in 64-bit _dl_runtime_profile

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Preparation for the usage of R0 by __fentry__.

ChangeLog:

	* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_profile):
	Do not clobber R0.
This commit is contained in:
Ilya Leoshkevich 2018-08-10 09:07:43 +02:00 committed by Stefan Liebler
parent 5755f5e4cc
commit bde6320f39
2 changed files with 11 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2018-08-10 Ilya Leoshkevich <iii@linux.ibm.com>
* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_profile):
Do not clobber R0.
2018-08-10 Ilya Leoshkevich <iii@linux.ibm.com>
* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_resolve):

6
sysdeps/s390/s390-64/dl-trampoline.h
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@ -170,6 +170,7 @@ _dl_runtime_resolve:
# define V29_OFF -208
# define V30_OFF -192
# define V31_OFF -176
# define R0_OFF -144
# define R12_OFF -136
# define R14_OFF -128
# define FRAMESIZE_OFF -120
@ -185,6 +186,8 @@ _dl_runtime_resolve:
cfi_startproc
.align 16
_dl_runtime_profile:
stg %r0,CFA_OFF+R0_OFF(%r15)
cfi_offset (r0, R0_OFF)
stg %r12,CFA_OFF+R12_OFF(%r15) # r12 is used as backup of r15
cfi_offset (r12, R12_OFF)
stg %r14,CFA_OFF+R14_OFF(%r15)
@ -250,6 +253,7 @@ _dl_runtime_profile:
cfi_def_cfa_register (15)
lg %r14,CFA_OFF+R14_OFF(%r15) # restore registers
lg %r12,CFA_OFF+R12_OFF(%r15)
lg %r0,CFA_OFF+R0_OFF(%r15)
br %r1 # tail call
cfi_def_cfa_register (12)
@ -287,6 +291,7 @@ _dl_runtime_profile:
cfi_def_cfa_register (15)
lg %r14,CFA_OFF+R14_OFF(%r15) # restore registers
lg %r12,CFA_OFF+R12_OFF(%r15)
lg %r0,CFA_OFF+R0_OFF(%r15)
lg %r2,CFA_OFF+RET_R2_OFF(%r15) # restore return values
ld %f0,CFA_OFF+RET_F0_OFF(%r15)
# ifdef RESTORE_VRS
@ -318,6 +323,7 @@ _dl_runtime_profile:
# undef V29_OFF
# undef V30_OFF
# undef V31_OFF
# undef R0_OFF
# undef R12_OFF
# undef R14_OFF
# undef FRAMESIZE_OFF