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S/390: Fix _dl_runtime_profile
This commit is contained in:
Andreas Krebbel
parent
2969121014
commit
f78b5caa6e
@ -1,3 +1,9 @@
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2013-02-18 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
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* sysdeps/s390/s390-64/dl-trampoline.S (_dl_runtime_resolve):
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Syntactic changes only.
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(_dl_runtime_profile): Do a tail-call to the resolved function.
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2013-02-17 Joseph Myers <joseph@codesourcery.com>
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[BZ #13550]
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@ -1,4 +1,4 @@
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/* PLT trampolines. s390 version.
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/* PLT trampolines. s390x version.
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Copyright (C) 2005-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -20,8 +20,8 @@
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* with the following linkage:
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* r2 - r6 : parameter registers
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* f0, f2, f4, f6 : floating point parameter registers
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* 24(r15), 28(r15) : PLT arguments PLT1, PLT2
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* 96(r15) : additional stack parameters
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* 48(r15), 56(r15) : PLT arguments PLT1, PLT2
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* 160(r15) : additional stack parameters
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* The normal clobber rules for function calls apply:
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* r0 - r5 : call clobbered
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* r6 - r13 : call saved
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@ -39,21 +39,21 @@
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cfi_startproc
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.align 16
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_dl_runtime_resolve:
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stmg 2,5,64(15) # save registers
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stg 14,96(15)
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stmg %r2,%r5,64(15) # save call-clobbered argument registers
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stg %r14,96(15)
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cfi_offset (r14, -64)
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lgr 0,15 # create stack frame
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aghi 15,-160
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lgr %r0,%r15
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aghi %r15,-160 # create stack frame
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cfi_adjust_cfa_offset (160)
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stg 0,0(15)
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lmg 2,3,208(15) # load args saved by PLT
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brasl 14,_dl_fixup # call fixup
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lgr 1,2 # function addr returned in r2
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aghi 15,160 # remove stack frame
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stg %r0,0(%r15) # write backchain
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lmg %r2,%r3,208(%r15)# load args saved by PLT
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brasl %r14,_dl_fixup # call fixup
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lgr %r1,%r2 # function addr returned in r2
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aghi %r15,160 # remove stack frame
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cfi_adjust_cfa_offset (-160)
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lg 14,96(15) # restore registers
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lmg 2,5,64(15)
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br 1
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lg %r14,96(15) # restore registers
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lmg %r2,%r5,64(15)
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br %r1
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cfi_endproc
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.size _dl_runtime_resolve, .-_dl_runtime_resolve
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@ -64,13 +64,12 @@ _dl_runtime_resolve:
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cfi_startproc
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.align 16
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_dl_runtime_profile:
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stmg %r2,%r6,64(%r15) # save registers
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std %f0,104(%r15)
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std %f2,112(%r15)
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stmg %r2,%r6,64(%r15) # save call-clobbered arg regs
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std %f0,104(%r15) # + r6 needed as arg for
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std %f2,112(%r15) # _dl_profile_fixup
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std %f4,120(%r15)
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std %f6,128(%r15)
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stg %r6,16(%r15)
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stg %r12,24(%r15)
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stg %r12,24(%r15) # r12 is used as backup of r15
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stg %r14,32(%r15)
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cfi_offset (r6, -96)
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cfi_offset (f0, -56)
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@ -79,10 +78,10 @@ _dl_runtime_profile:
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cfi_offset (f6, -32)
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cfi_offset (r12, -136)
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cfi_offset (r14, -128)
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lgr %r12,%r15 # create stack frame
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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,-160
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stg %r12,0(%r15)
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aghi %r15,-160 # create stack frame
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stg %r12,0(%r15) # save backchain
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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 %r5,64(%r12) # pointer to struct La_s390_32_regs
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@ -92,18 +91,19 @@ _dl_runtime_profile:
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lg %r0,40(%r12) # load framesize
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ltgr %r0,%r0
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jnm 1f
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lmg %r2,%r6,64(%r12)
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ld %f0,104(%r12)
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ld %f2,112(%r12)
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lmg %r2,%r6,64(%r12) # framesize < 0 means no pltexit call
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ld %f0,104(%r12) # so we can do a tail call without
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ld %f2,112(%r12) # copying the arg overflow area
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ld %f4,120(%r12)
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ld %f6,128(%r12)
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basr %r14,%r1 # call resolved function
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0: lgr %r15,%r12 # remove stack frame
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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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lg %r6,16(%r15)
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br %r14
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br %r1 # tail-call to resolved function
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cfi_def_cfa_register (12)
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1: jz 4f # framesize == 0 ?
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aghi %r0,7 # align framesize to 8
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@ -118,7 +118,7 @@ _dl_runtime_profile:
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la %r3,8(%r3)
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brctg %r0,3b
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4: lmg %r2,%r6,64(%r12) # load register parameters
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ld %f0,104(%r12)
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ld %f0,104(%r12) # restore call-clobbered arg regs
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ld %f2,112(%r12)
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ld %f4,120(%r12)
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ld %f6,128(%r12)
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@ -129,7 +129,13 @@ _dl_runtime_profile:
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la %r4,32(%r12) # pointer to struct La_s390_32_regs
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la %r5,72(%r12) # pointer to struct La_s390_32_retval
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brasl %r14,_dl_call_pltexit
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j 0b
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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 %r14
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cfi_endproc
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.size _dl_runtime_profile, .-_dl_runtime_profile
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#endif
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