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bb38d32c23
* sysdeps/s390/bits/link.h: New file. * sysdeps/s390/s390-32/dl-trampoline.S: New file. * sysdeps/s390/s390-64/dl-trampoline.S: New file. * sysdeps/s390/s390-32/dl-machine.h: Move PLT trampolines to dl-trampoline.S. Use RESOLVE_MAP instead of RESOLVE to protect relocation code. (elf_machine_runtime_setup): Test for dl_profile non-null. (elf_machine_rela): Remove code using RESOLVE. (ARCH_LA_PLTENTER, ARCH_LA_PLTEXIT): New. * sysdeps/s390/s390-64/dl-machine.h: Likewise. * sysdeps/generic/ldsodefs.h (La_s390_32_regs, La_s390_32_retval, La_s390_64_regs, La_s390_64_retval): New. * elf/tst-auditmod1.c: Add s390 entries.
127 lines
3.9 KiB
ArmAsm
127 lines
3.9 KiB
ArmAsm
/* PLT trampolines. s390 version.
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* The PLT stubs will call _dl_runtime_resolve/_dl_runtime_profile
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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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* 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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* r14 : return address (call clobbered)
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* r15 : stack pointer (call saved)
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* f1, f3, f5, f7 : call saved
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* f0 - f3, f5, f7 - f15 : call clobbered
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*/
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#include <sysdep.h>
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.text
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.globl _dl_runtime_resolve
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.type _dl_runtime_resolve, @function
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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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lgr 0,15 # create stack frame
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aghi 15,-160
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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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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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cfi_endproc
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.size _dl_runtime_resolve, .-_dl_runtime_resolve
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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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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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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 %r14,32(%r15)
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lgr %r12,%r15 # create stack frame
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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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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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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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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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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: lr %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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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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nill %r0,0xfff8
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slgr %r15,%r0 # make room for framesize bytes
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stg %r12,0(%r15)
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la %r2,160(%r15)
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la %r3,160(%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)
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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 %f2,112(%r12)
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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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stg %r2,136(%r12)
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std %f0,144(%r12)
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lmg %r2,%r3,48(%r12) # load arguments saved by PLT
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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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cfi_endproc
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.size _dl_runtime_profile, .-_dl_runtime_profile
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