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S390: Use symbolic offsets for stack variables in 64-bit _dl_runtime_profile
Maintainability improvement. ChangeLog: * sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_profile): Use symbolic offsets for stack variables.
This commit is contained in:
Ilya Leoshkevich
Stefan Liebler
parent
0fb7afa2f9
commit
329c6fec8b
@ -1,3 +1,8 @@
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2018-08-10 Ilya Leoshkevich <iii@linux.ibm.com>
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* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_profile):
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Use symbolic offsets for stack variables.
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2018-08-10 Ilya Leoshkevich <iii@linux.ibm.com>
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* sysdeps/s390/s390-64/dl-trampoline.h (_dl_runtime_resolve):
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@ -145,122 +145,181 @@ _dl_runtime_resolve:
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#undef F6_OFF
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#ifndef PROF
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# define SIZEOF_STRUCT_LA_S390_64_REGS 200
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# define REGS_OFF -360
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# define R2_OFF -360
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# define R3_OFF -352
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# define R4_OFF -344
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# define R5_OFF -336
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# define R6_OFF -328
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# define F0_OFF -320
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# define F2_OFF -312
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# define F4_OFF -304
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# define F6_OFF -296
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# define V24_OFF -288
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# define V25_OFF -272
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# define V26_OFF -256
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# define V27_OFF -240
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# define V28_OFF -224
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# define V29_OFF -208
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# define V30_OFF -192
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# define V31_OFF -176
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# define R12_OFF -136
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# define R14_OFF -128
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# define FRAMESIZE_OFF -120
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# define PLT1_OFF -112
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# define PLT2_OFF -104
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# define PREGS_OFF -96
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# define RETVAL_OFF -88
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# define RET_R2_OFF -88
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# define RET_F0_OFF -80
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# define RET_V24_OFF -72
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.globl _dl_runtime_profile
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.type _dl_runtime_profile, @function
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cfi_startproc
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.align 16
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_dl_runtime_profile:
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stg %r12,24(%r15) # r12 is used as backup of r15
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cfi_offset (r12, -136)
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stg %r14,32(%r15)
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cfi_offset (r14, -128)
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lgr %r12,%r15 # backup stack pointer
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stg %r12,CFA_OFF+R12_OFF(%r15) # r12 is used as backup of r15
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cfi_offset (r12, R12_OFF)
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stg %r14,CFA_OFF+R14_OFF(%r15)
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cfi_offset (r14, R14_OFF)
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lgr %r12,%r15 # backup stack pointer
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cfi_def_cfa_register (12)
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aghi %r15,-360 # create stack frame:
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# 160 + sizeof(La_s390_64_regs)
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stg %r12,0(%r15) # save backchain
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# define FRAME_SIZE (CFA_OFF + SIZEOF_STRUCT_LA_S390_64_REGS)
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aghi %r15,-FRAME_SIZE # create stack frame:
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stg %r12,0(%r15) # save backchain
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stmg %r2,%r6,160(%r15) # save call-clobbered arg regs
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cfi_offset (r2, -360) # + r6 needed as arg for
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cfi_offset (r3, -352) # _dl_profile_fixup
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cfi_offset (r4, -344)
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cfi_offset (r5, -336)
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cfi_offset (r6, -328)
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std %f0,200(%r15)
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cfi_offset (f0, -320)
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std %f2,208(%r15)
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cfi_offset (f2, -312)
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std %f4,216(%r15)
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cfi_offset (f4, -304)
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std %f6,224(%r15)
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cfi_offset (f6, -296)
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#ifdef RESTORE_VRS
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stmg %r2,%r6,FRAME_OFF+R2_OFF(%r15) # save call-clobbered arg regs
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cfi_offset (r2, R2_OFF) # + r6 needed as arg for
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cfi_offset (r3, R3_OFF) # _dl_profile_fixup
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cfi_offset (r4, R4_OFF)
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cfi_offset (r5, R5_OFF)
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cfi_offset (r6, R6_OFF)
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std %f0,FRAME_OFF+F0_OFF(%r15)
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cfi_offset (f0, F0_OFF)
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std %f2,FRAME_OFF+F2_OFF(%r15)
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cfi_offset (f2, F2_OFF)
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std %f4,FRAME_OFF+F4_OFF(%r15)
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cfi_offset (f4, F4_OFF)
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std %f6,FRAME_OFF+F6_OFF(%r15)
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cfi_offset (f6, F6_OFF)
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# ifdef RESTORE_VRS
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.machine push
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.machine "z13"
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vstm %v24,%v31,232(%r15) # store call-clobbered vector arguments
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cfi_offset (v24, -288)
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cfi_offset (v25, -272)
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cfi_offset (v26, -256)
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cfi_offset (v27, -240)
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cfi_offset (v28, -224)
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cfi_offset (v29, -208)
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cfi_offset (v30, -192)
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cfi_offset (v31, -176)
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vstm %v24,%v31,FRAME_OFF+V24_OFF(%r15) # store call-clobbered
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cfi_offset (v24, V24_OFF) # vr arguments
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cfi_offset (v25, V25_OFF)
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cfi_offset (v26, V26_OFF)
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cfi_offset (v27, V27_OFF)
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cfi_offset (v28, V28_OFF)
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cfi_offset (v29, V29_OFF)
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cfi_offset (v30, V30_OFF)
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cfi_offset (v31, V31_OFF)
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.machine pop
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#endif
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lmg %r2,%r3,48(%r12) # load arguments saved by PLT
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lgr %r4,%r14 # return address as third parameter
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la %r5,160(%r15) # pointer to struct La_s390_64_regs
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la %r6,40(%r12) # long int * framesize
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brasl %r14,_dl_profile_fixup # call resolver
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lgr %r1,%r2 # function addr returned in r2
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ld %f0,200(%r15) # restore call-clobbered arg fprs
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ld %f2,208(%r15)
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ld %f4,216(%r15)
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ld %f6,224(%r15)
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#ifdef RESTORE_VRS
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# endif
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lmg %r2,%r3,CFA_OFF+PLT1_OFF(%r12) # load arguments saved by PLT
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lgr %r4,%r14 # return address as 3rd parameter
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la %r5,FRAME_OFF+REGS_OFF(%r15) # struct La_s390_64_regs *
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la %r6,CFA_OFF+FRAMESIZE_OFF(%r12) # long int * framesize
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brasl %r14,_dl_profile_fixup # call resolver
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lgr %r1,%r2 # function addr returned in r2
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ld %f0,FRAME_OFF+F0_OFF(%r15) # restore call-clobbered
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ld %f2,FRAME_OFF+F2_OFF(%r15) # arg fprs
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ld %f4,FRAME_OFF+F4_OFF(%r15)
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ld %f6,FRAME_OFF+F6_OFF(%r15)
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# ifdef RESTORE_VRS
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.machine push
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.machine "z13"
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vlm %v24,%v31,232(%r15) # restore call-clobbered arg vrs
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.machine "z13" # restore call-clobbered
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vlm %v24,%v31,FRAME_OFF+V24_OFF(%r15)# arg vrs
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.machine pop
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#endif
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lg %r0,40(%r12) # load framesize
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# endif
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lg %r0,CFA_OFF+FRAMESIZE_OFF(%r12) # load framesize
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ltgr %r0,%r0
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jnm 1f
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lmg %r2,%r6,160(%r15) # framesize < 0 means no pltexit call
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# so we can do a tail call without
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# copying the arg overflow area
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lgr %r15,%r12 # remove stack frame
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# framesize < 0 means no
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lmg %r2,%r6,FRAME_OFF+R2_OFF(%r15) # pltexit call, so we can do a
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# tail call without copying the
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# arg overflow area
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lgr %r15,%r12 # remove stack frame
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cfi_def_cfa_register (15)
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lg %r14,32(%r15) # restore registers
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lg %r12,24(%r15)
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br %r1 # tail-call to resolved function
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lg %r14,CFA_OFF+R14_OFF(%r15) # restore registers
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lg %r12,CFA_OFF+R12_OFF(%r15)
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br %r1 # tail call
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cfi_def_cfa_register (12)
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1: la %r4,160(%r15) # pointer to struct La_s390_64_regs
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stg %r4,64(%r12)
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jz 4f # framesize == 0 ?
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aghi %r0,7 # align framesize to 8
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1: la %r4,FRAME_OFF+REGS_OFF(%r15) # struct La_s390_64_regs *
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stg %r4,CFA_OFF+PREGS_OFF(%r12)
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jz 4f # framesize == 0 ?
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aghi %r0,7 # align framesize to 8
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nill %r0,0xfff8
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slgr %r15,%r0 # make room for framesize bytes
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stg %r12,0(%r15) # save backchain
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la %r2,160(%r15)
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la %r3,160(%r12)
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slgr %r15,%r0 # make room for framesize bytes
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stg %r12,0(%r15) # save backchain
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la %r2,FRAME_OFF+REGS_OFF(%r15)
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la %r3,CFA_OFF(%r12)
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srlg %r0,%r0,3
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3: mvc 0(8,%r2),0(%r3) # copy additional parameters
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la %r2,8(%r2) # depending on framesize
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3: mvc 0(8,%r2),0(%r3) # copy additional parameters
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la %r2,8(%r2) # depending on framesize
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la %r3,8(%r3)
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brctg %r0,3b
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4: lmg %r2,%r6,0(%r4) # restore call-clobbered arg gprs
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basr %r14,%r1 # call resolved function
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stg %r2,72(%r12) # store return values r2, f0
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std %f0,80(%r12) # to struct La_s390_64_retval
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#ifdef RESTORE_VRS
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4: lmg %r2,%r6,0(%r4) # load register parameters
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basr %r14,%r1 # call resolved function
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stg %r2,CFA_OFF+RET_R2_OFF(%r12) # store return values r2, f0
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std %f0,CFA_OFF+RET_F0_OFF(%r12) # to struct La_s390_64_retval
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# ifdef RESTORE_VRS
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.machine push
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.machine "z13"
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vst %v24,88(%r12) # store return value v24
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vst %v24,CFA_OFF+RET_V24_OFF(%r12) # store return value v24
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.machine pop
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#endif
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lmg %r2,%r4,48(%r12) # r2, r3: load arguments saved by PLT
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# r4: pointer to struct La_s390_64_regs
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la %r5,72(%r12) # pointer to struct La_s390_64_retval
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# endif
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lmg %r2,%r4,CFA_OFF+PLT1_OFF(%r12) # r2, r3: args saved by PLT
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# r4: struct La_s390_64_regs *
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la %r5,CFA_OFF+RETVAL_OFF(%r12) # struct La_s390_64_retval *
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brasl %r14,_dl_call_pltexit
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lgr %r15,%r12 # remove stack frame
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lgr %r15,%r12 # remove stack frame
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# undef FRAME_SIZE
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cfi_def_cfa_register (15)
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lg %r14,32(%r15) # restore registers
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lg %r12,24(%r15)
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lg %r2,72(%r15) # restore return values
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ld %f0,80(%r15)
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#ifdef RESTORE_VRS
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lg %r14,CFA_OFF+R14_OFF(%r15) # restore registers
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lg %r12,CFA_OFF+R12_OFF(%r15)
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lg %r2,CFA_OFF+RET_R2_OFF(%r15) # restore return values
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ld %f0,CFA_OFF+RET_F0_OFF(%r15)
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# ifdef RESTORE_VRS
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.machine push
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.machine "z13"
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vl %v24,88(%r15) # restore return value v24
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vl %v24,CFA_OFF+RET_V24_OFF(%r15) # restore return value v24
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.machine pop
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#endif
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# endif
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br %r14 # Jump back to caller
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cfi_endproc
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.size _dl_runtime_profile, .-_dl_runtime_profile
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# undef SIZEOF_STRUCT_LA_S390_64_REGS
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# undef REGS_OFF
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# undef R2_OFF
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# undef R3_OFF
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# undef R4_OFF
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# undef R5_OFF
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# undef R6_OFF
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# undef F0_OFF
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# undef F2_OFF
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# undef F4_OFF
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# undef F6_OFF
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# undef V24_OFF
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# undef V25_OFF
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# undef V26_OFF
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# undef V27_OFF
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# undef V28_OFF
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# undef V29_OFF
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# undef V30_OFF
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# undef V31_OFF
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# undef R12_OFF
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# undef R14_OFF
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# undef FRAMESIZE_OFF
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# undef PLT1_OFF
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# undef PLT2_OFF
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# undef PREGS_OFF
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# undef RETVAL_OFF
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# undef RET_R2_OFF
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# undef RET_F0_OFF
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# undef RET_V24_OFF
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#endif
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