S390: Save and restore fprs/vrs while resolving symbols.
On s390, no fpr/vrs were saved while resolving a symbol via _dl_runtime_resolve/_dl_runtime_profile. According to the abi, the fpr-arguments are defined as call clobbered. In leaf-functions, gcc 4.9 and newer can use fprs for saving/restoring gprs instead of saving them to the stack. If gcc do this in one of the resolver-functions, then the floating point arguments of a library-function are invalid for the first library-function-call. Thus, this patch saves/restores the fprs around the resolving code. The same could occur for vector registers. Furthermore an ifunc-resolver could also clobber the vector/floating point argument registers. Thus this patch provides the further variants _dl_runtime_resolve_vx/ _dl_runtime_profile_vx, which are used if the kernel claims, that we run on a machine with vector registers. Furthermore, if _dl_runtime_profile calls _dl_call_pltexit, the pointers to inregs-/outregs-structs were setup invalid. Now they point to the correct location in the stack-frame. Before branching back to the caller, the return values are now restored instead of containing the return values of the _dl_call_pltexit() call. On s390-32, an endless loop occurs if _dl_call_pltexit() should be called. Now, this code-path branches to this function instead of just after the preceding basr-instruction. ChangeLog: * sysdeps/s390/s390-32/dl-trampoline.S: Include dl-trampoline.h twice to create a non-vector/vector version for _dl_runtime_resolve and _dl_runtime_profile. Move implementation to ... * sysdeps/s390/s390-32/dl-trampoline.h: ... here. (_dl_runtime_resolve) Save and restore fpr/vrs. (_dl_runtime_profile) Save and restore vrs and fix some issues if _dl_call_pltexit is called. * sysdeps/s390/s390-32/dl-machine.h (elf_machine_runtime_setup): Choose the correct resolver function if running on a machine with vx. * sysdeps/s390/s390-64/dl-trampoline.S: Include dl-trampoline.h twice to create a non-vector/vector version for _dl_runtime_resolve and _dl_runtime_profile. Move implementation to ... * sysdeps/s390/s390-64/dl-trampoline.h: ... here. (_dl_runtime_resolve) Save and restore fpr/vrs. (_dl_runtime_profile) Save and restore vrs and fix some issues * sysdeps/s390/s390-64/dl-machine.h: (elf_machine_runtime_setup): Choose the correct resolver function if running on a machine with vx.
This commit is contained in:
Stefan Liebler
parent
e91bd74658
commit
4603c51ef7
20
ChangeLog
20
ChangeLog
@ -1,3 +1,23 @@
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2016-03-31 Stefan Liebler <stli@linux.vnet.ibm.com>
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* sysdeps/s390/s390-32/dl-trampoline.S: Include dl-trampoline.h twice
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to create a non-vector/vector version for _dl_runtime_resolve and
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_dl_runtime_profile. Move implementation to ...
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* sysdeps/s390/s390-32/dl-trampoline.h: ... here.
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(_dl_runtime_resolve) Save and restore fpr/vrs.
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(_dl_runtime_profile) Save and restore vrs and fix some issues
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if _dl_call_pltexit is called.
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* sysdeps/s390/s390-32/dl-machine.h (elf_machine_runtime_setup):
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Choose the correct resolver function if running on a machine with vx.
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* sysdeps/s390/s390-64/dl-trampoline.S: Include dl-trampoline.h twice
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to create a non-vector/vector version for _dl_runtime_resolve and
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_dl_runtime_profile. Move implementation to ...
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* sysdeps/s390/s390-64/dl-trampoline.h: ... here.
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(_dl_runtime_resolve) Save and restore fpr/vrs.
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(_dl_runtime_profile) Save and restore vrs and fix some issues
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* sysdeps/s390/s390-64/dl-machine.h: (elf_machine_runtime_setup):
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Choose the correct resolver function if running on a machine with vx.
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2016-03-31 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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2016-03-31 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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* elf/tst-dlsym-error.c: Include <string.h> for strchrnul.
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* elf/tst-dlsym-error.c: Include <string.h> for strchrnul.
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@ -89,6 +89,11 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
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{
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{
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extern void _dl_runtime_resolve (Elf32_Word);
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extern void _dl_runtime_resolve (Elf32_Word);
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extern void _dl_runtime_profile (Elf32_Word);
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extern void _dl_runtime_profile (Elf32_Word);
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#if defined HAVE_S390_VX_ASM_SUPPORT
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extern void _dl_runtime_resolve_vx (Elf32_Word);
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extern void _dl_runtime_profile_vx (Elf32_Word);
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#endif
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if (l->l_info[DT_JMPREL] && lazy)
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if (l->l_info[DT_JMPREL] && lazy)
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{
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{
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@ -116,7 +121,14 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
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end in this function. */
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end in this function. */
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if (__glibc_unlikely (profile))
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if (__glibc_unlikely (profile))
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{
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{
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#if defined HAVE_S390_VX_ASM_SUPPORT
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if (GLRO(dl_hwcap) & HWCAP_S390_VX)
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got[2] = (Elf32_Addr) &_dl_runtime_profile_vx;
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else
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got[2] = (Elf32_Addr) &_dl_runtime_profile;
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#else
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got[2] = (Elf32_Addr) &_dl_runtime_profile;
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got[2] = (Elf32_Addr) &_dl_runtime_profile;
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#endif
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if (GLRO(dl_profile) != NULL
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if (GLRO(dl_profile) != NULL
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&& _dl_name_match_p (GLRO(dl_profile), l))
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&& _dl_name_match_p (GLRO(dl_profile), l))
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@ -125,9 +137,18 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
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GL(dl_profile_map) = l;
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GL(dl_profile_map) = l;
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}
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}
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else
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else
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/* This function will get called to fix up the GOT entry indicated by
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{
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the offset on the stack, and then jump to the resolved address. */
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/* This function will get called to fix up the GOT entry indicated by
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got[2] = (Elf32_Addr) &_dl_runtime_resolve;
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the offset on the stack, and then jump to the resolved address. */
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#if defined HAVE_S390_VX_ASM_SUPPORT
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if (GLRO(dl_hwcap) & HWCAP_S390_VX)
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got[2] = (Elf32_Addr) &_dl_runtime_resolve_vx;
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else
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got[2] = (Elf32_Addr) &_dl_runtime_resolve;
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#else
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got[2] = (Elf32_Addr) &_dl_runtime_resolve;
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#endif
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}
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}
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}
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return lazy;
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return lazy;
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@ -16,130 +16,18 @@
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License along with the GNU C Library; if not, see
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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/* This code is used in dl-runtime.c to call the `fixup' function
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and then redirect to the address it returns. */
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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 : 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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* f4, f6 : 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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#include <sysdep.h>
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.text
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.text
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.globl _dl_runtime_resolve
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/* Create variant of _dl_runtime_resolve/profile for machines before z13.
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.type _dl_runtime_resolve, @function
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No vector registers are saved/restored. */
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cfi_startproc
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#include <dl-trampoline.h>
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.align 16
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_dl_runtime_resolve:
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stm %r2,%r5,32(%r15) # save registers
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st %r14,8(%r15)
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cfi_offset (r14, -88)
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lr %r0,%r15 # create stack frame
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ahi %r15,-96
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cfi_adjust_cfa_offset (96)
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st 0,0(%r15)
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lm %r2,%r3,120(%r15) # load args saved by PLT
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basr %r1,0
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0: l %r14,1f-0b(%r1)
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bas %r14,0(%r14,%r1) # call resolver
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lr %r1,%r2 # function addr returned in r2
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ahi %r15,96 # remove stack frame
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cfi_adjust_cfa_offset (-96)
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l %r14,8(15) # restore registers
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lm %r2,%r5,32(%r15)
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br %r1
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1: .long _dl_fixup - 0b
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cfi_endproc
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.size _dl_runtime_resolve, .-_dl_runtime_resolve
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#if defined HAVE_S390_VX_ASM_SUPPORT
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#ifndef PROF
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/* Create variant of _dl_runtime_resolve/profile for z13 and newer.
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.globl _dl_runtime_profile
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The vector registers are saved/restored, too.*/
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.type _dl_runtime_profile, @function
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# define _dl_runtime_resolve _dl_runtime_resolve_vx
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cfi_startproc
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# define _dl_runtime_profile _dl_runtime_profile_vx
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.align 16
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# define RESTORE_VRS
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_dl_runtime_profile:
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# include <dl-trampoline.h>
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stm %r2,%r6,32(%r15) # save registers
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std %f0,56(%r15)
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std %f2,64(%r15)
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st %r6,8(%r15)
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st %r12,12(%r15)
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st %r14,16(%r15)
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cfi_offset (r6, -64)
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cfi_offset (f0, -40)
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cfi_offset (f2, -32)
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cfi_offset (r12, -84)
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cfi_offset (r14, -80)
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lr %r12,%r15 # create stack frame
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cfi_def_cfa_register (12)
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ahi %r15,-96
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st %r12,0(%r15)
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lm %r2,%r3,24(%r12) # load arguments saved by PLT
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lr %r4,%r14 # return address as third parameter
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basr %r1,0
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0: l %r14,6f-0b(%r1)
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la %r5,32(%r12) # pointer to struct La_s390_32_regs
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la %r6,20(%r12) # long int * framesize
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bas %r14,0(%r14,%r1) # call resolver
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lr %r1,%r2 # function addr returned in r2
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icm %r0,15,20(%r12) # load & test framesize
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jnm 2f
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lm %r2,%r6,32(%r12)
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ld %f0,56(%r12)
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ld %f2,64(%r12)
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lr %r15,%r12 # remove stack frame
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cfi_def_cfa_register (15)
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l %r14,16(%r15) # restore registers
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l %r12,12(%r15)
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br %r1 # tail-call to the resolved function
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cfi_def_cfa_register (12)
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2: jz 4f # framesize == 0 ?
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ahi %r0,7 # align framesize to 8
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lhi %r2,-8
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nr %r0,%r2
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slr %r15,%r0 # make room for framesize bytes
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st %r12,0(%r15)
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la %r2,96(%r15)
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la %r3,96(%r12)
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srl %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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brct %r0,3b
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4: lm %r2,%r6,32(%r12) # load register parameters
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ld %f0,56(%r12)
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ld %f2,64(%r12)
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basr %r14,%r1 # call resolved function
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stm %r2,%r3,72(%r12)
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std %f0,80(%r12)
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lm %r2,%r3,24(%r12) # load arguments saved by PLT
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basr %r1,0
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5: l %r14,7f-5b(%r1)
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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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basr %r14,%r1 # call _dl_call_pltexit
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lr %r15,%r12 # remove stack frame
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cfi_def_cfa_register (15)
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l %r14,16(%r15) # restore registers
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l %r12,12(%r15)
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br %r14
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6: .long _dl_profile_fixup - 0b
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7: .long _dl_call_pltexit - 5b
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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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#endif
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215
sysdeps/s390/s390-32/dl-trampoline.h
Normal file
215
sysdeps/s390/s390-32/dl-trampoline.h
Normal file
@ -0,0 +1,215 @@
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/* PLT trampolines. s390 version.
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Copyright (C) 2016 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, see
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<http://www.gnu.org/licenses/>. */
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/* This code is used in dl-runtime.c to call the `fixup' function
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and then redirect to the address it returns. */
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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 : floating point parameter registers
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* v24, v26, v28, v30, v25, v27, v29, v31 : vector 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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* f4, f6 : call saved
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* f0 - f3, f5, f7 - f15 : call clobbered
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* v0 - v3, v5, v7 - v15 : bytes 0-7 overlap with fprs: call clobbered
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bytes 8-15: call clobbered
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* v4, v6 : bytes 0-7 overlap with f4, f6: call saved
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bytes 8-15: call clobbered
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* v16 - v31 : call clobbered
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*/
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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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stm %r2,%r5,32(%r15) # save registers
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cfi_offset (r2, -64)
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cfi_offset (r3, -60)
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cfi_offset (r4, -56)
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cfi_offset (r5, -52)
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std %f0,56(%r15)
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cfi_offset (f0, -40)
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std %f2,64(%r15)
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cfi_offset (f2, -32)
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st %r14,8(%r15)
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cfi_offset (r14, -88)
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lr %r0,%r15
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lm %r2,%r3,24(%r15) # load args saved by PLT
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#ifdef RESTORE_VRS
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ahi %r15,-224 # create stack frame
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cfi_adjust_cfa_offset (224)
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.machine push
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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vstm %v24,%v31,96(%r15) # store call-clobbered vr arguments
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cfi_offset (v24, -224)
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cfi_offset (v25, -208)
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cfi_offset (v26, -192)
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cfi_offset (v27, -176)
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cfi_offset (v28, -160)
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cfi_offset (v29, -144)
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cfi_offset (v30, -128)
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cfi_offset (v31, -112)
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.machine pop
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#else
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ahi %r15,-96 # create stack frame
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cfi_adjust_cfa_offset (96)
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#endif
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st %r0,0(%r15) # write backchain
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basr %r1,0
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0: l %r14,1f-0b(%r1)
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bas %r14,0(%r14,%r1) # call _dl_fixup
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lr %r1,%r2 # function addr returned in r2
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#ifdef RESTORE_VRS
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|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
.machinemode "zarch_nohighgprs"
|
||||||
|
vlm %v24,%v31,96(%r15) # restore vector registers
|
||||||
|
.machine pop
|
||||||
|
aghi %r15,224 # remove stack frame
|
||||||
|
cfi_adjust_cfa_offset (-224)
|
||||||
|
#else
|
||||||
|
ahi %r15,96 # remove stack frame
|
||||||
|
cfi_adjust_cfa_offset (-96)
|
||||||
|
#endif
|
||||||
|
l %r14,8(15) # restore registers
|
||||||
|
ld %f0,56(%r15)
|
||||||
|
ld %f2,64(%r15)
|
||||||
|
lm %r2,%r5,32(%r15)
|
||||||
|
br %r1
|
||||||
|
1: .long _dl_fixup - 0b
|
||||||
|
cfi_endproc
|
||||||
|
.size _dl_runtime_resolve, .-_dl_runtime_resolve
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef PROF
|
||||||
|
.globl _dl_runtime_profile
|
||||||
|
.type _dl_runtime_profile, @function
|
||||||
|
cfi_startproc
|
||||||
|
.align 16
|
||||||
|
_dl_runtime_profile:
|
||||||
|
stm %r2,%r6,32(%r15) # save registers
|
||||||
|
cfi_offset (r2, -64) # + r6 needed as arg for
|
||||||
|
cfi_offset (r3, -60) # _dl_profile_fixup
|
||||||
|
cfi_offset (r4, -56)
|
||||||
|
cfi_offset (r5, -52)
|
||||||
|
cfi_offset (r6, -48)
|
||||||
|
std %f0,56(%r15)
|
||||||
|
cfi_offset (f0, -40)
|
||||||
|
std %f2,64(%r15)
|
||||||
|
cfi_offset (f2, -32)
|
||||||
|
st %r12,12(%r15) # r12 is used as backup of r15
|
||||||
|
cfi_offset (r12, -84)
|
||||||
|
st %r14,16(%r15)
|
||||||
|
cfi_offset (r14, -80)
|
||||||
|
lr %r12,%r15 # backup stack pointer
|
||||||
|
cfi_def_cfa_register (12)
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
ahi %r15,-224 # create stack frame
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
.machinemode "zarch_nohighgprs"
|
||||||
|
vstm %v24,%v31,96(%r15) # store call-clobbered vr arguments
|
||||||
|
cfi_offset (v24, -224)
|
||||||
|
cfi_offset (v25, -208)
|
||||||
|
cfi_offset (v26, -192)
|
||||||
|
cfi_offset (v27, -176)
|
||||||
|
cfi_offset (v28, -160)
|
||||||
|
cfi_offset (v29, -144)
|
||||||
|
cfi_offset (v30, -128)
|
||||||
|
cfi_offset (v31, -112)
|
||||||
|
.machine pop
|
||||||
|
#else
|
||||||
|
ahi %r15,-96 # create stack frame
|
||||||
|
#endif
|
||||||
|
st %r12,0(%r15) # save backchain
|
||||||
|
lm %r2,%r3,24(%r12) # load arguments saved by PLT
|
||||||
|
lr %r4,%r14 # return address as third parameter
|
||||||
|
basr %r1,0
|
||||||
|
0: l %r14,6f-0b(%r1)
|
||||||
|
la %r5,32(%r12) # pointer to struct La_s390_32_regs
|
||||||
|
la %r6,20(%r12) # long int * framesize
|
||||||
|
bas %r14,0(%r14,%r1) # call resolver
|
||||||
|
lr %r1,%r2 # function addr returned in r2
|
||||||
|
ld %f0,56(%r12) # restore call-clobbered arg fprs
|
||||||
|
ld %f2,64(%r12)
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
.machinemode "zarch_nohighgprs"
|
||||||
|
vlm %v24,%v31,96(%r15) # restore call-clobbered arg vrs
|
||||||
|
.machine pop
|
||||||
|
#endif
|
||||||
|
icm %r0,15,20(%r12) # load & test framesize
|
||||||
|
jnm 2f
|
||||||
|
|
||||||
|
lm %r2,%r6,32(%r12)
|
||||||
|
lr %r15,%r12 # remove stack frame
|
||||||
|
cfi_def_cfa_register (15)
|
||||||
|
l %r14,16(%r15) # restore registers
|
||||||
|
l %r12,12(%r15)
|
||||||
|
br %r1 # tail-call to the resolved function
|
||||||
|
|
||||||
|
cfi_def_cfa_register (12)
|
||||||
|
2: jz 4f # framesize == 0 ?
|
||||||
|
ahi %r0,7 # align framesize to 8
|
||||||
|
lhi %r2,-8
|
||||||
|
nr %r0,%r2
|
||||||
|
slr %r15,%r0 # make room for framesize bytes
|
||||||
|
st %r12,0(%r15) # save backchain
|
||||||
|
la %r2,96(%r15)
|
||||||
|
la %r3,96(%r12)
|
||||||
|
srl %r0,3
|
||||||
|
3: mvc 0(8,%r2),0(%r3) # copy additional parameters
|
||||||
|
la %r2,8(%r2)
|
||||||
|
la %r3,8(%r3)
|
||||||
|
brct %r0,3b
|
||||||
|
4: lm %r2,%r6,32(%r12) # load register parameters
|
||||||
|
basr %r14,%r1 # call resolved function
|
||||||
|
stm %r2,%r3,72(%r12) # store return values r2, r3, f0
|
||||||
|
std %f0,80(%r12) # to struct La_s390_32_retval
|
||||||
|
lm %r2,%r3,24(%r12) # load arguments saved by PLT
|
||||||
|
basr %r1,0
|
||||||
|
5: l %r14,7f-5b(%r1)
|
||||||
|
la %r4,32(%r12) # pointer to struct La_s390_32_regs
|
||||||
|
la %r5,72(%r12) # pointer to struct La_s390_32_retval
|
||||||
|
bas %r14,0(%r14,%r1) # call _dl_call_pltexit
|
||||||
|
|
||||||
|
lr %r15,%r12 # remove stack frame
|
||||||
|
cfi_def_cfa_register (15)
|
||||||
|
l %r14,16(%r15) # restore registers
|
||||||
|
l %r12,12(%r15)
|
||||||
|
l %r2,72(%r15) # restore return values
|
||||||
|
l %r3,76(%r15)
|
||||||
|
ld %f0,80(%r15)
|
||||||
|
br %r14
|
||||||
|
|
||||||
|
6: .long _dl_profile_fixup - 0b
|
||||||
|
7: .long _dl_call_pltexit - 5b
|
||||||
|
cfi_endproc
|
||||||
|
.size _dl_runtime_profile, .-_dl_runtime_profile
|
||||||
|
#endif
|
||||||
@ -26,6 +26,7 @@
|
|||||||
#include <sys/param.h>
|
#include <sys/param.h>
|
||||||
#include <string.h>
|
#include <string.h>
|
||||||
#include <link.h>
|
#include <link.h>
|
||||||
|
#include <sysdeps/s390/dl-procinfo.h>
|
||||||
#include <dl-irel.h>
|
#include <dl-irel.h>
|
||||||
|
|
||||||
#define ELF_MACHINE_IRELATIVE R_390_IRELATIVE
|
#define ELF_MACHINE_IRELATIVE R_390_IRELATIVE
|
||||||
@ -78,6 +79,10 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
|||||||
{
|
{
|
||||||
extern void _dl_runtime_resolve (Elf64_Word);
|
extern void _dl_runtime_resolve (Elf64_Word);
|
||||||
extern void _dl_runtime_profile (Elf64_Word);
|
extern void _dl_runtime_profile (Elf64_Word);
|
||||||
|
#if defined HAVE_S390_VX_ASM_SUPPORT
|
||||||
|
extern void _dl_runtime_resolve_vx (Elf64_Word);
|
||||||
|
extern void _dl_runtime_profile_vx (Elf64_Word);
|
||||||
|
#endif
|
||||||
|
|
||||||
if (l->l_info[DT_JMPREL] && lazy)
|
if (l->l_info[DT_JMPREL] && lazy)
|
||||||
{
|
{
|
||||||
@ -105,7 +110,14 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
|||||||
end in this function. */
|
end in this function. */
|
||||||
if (__glibc_unlikely (profile))
|
if (__glibc_unlikely (profile))
|
||||||
{
|
{
|
||||||
|
#if defined HAVE_S390_VX_ASM_SUPPORT
|
||||||
|
if (GLRO(dl_hwcap) & HWCAP_S390_VX)
|
||||||
|
got[2] = (Elf64_Addr) &_dl_runtime_profile_vx;
|
||||||
|
else
|
||||||
|
got[2] = (Elf64_Addr) &_dl_runtime_profile;
|
||||||
|
#else
|
||||||
got[2] = (Elf64_Addr) &_dl_runtime_profile;
|
got[2] = (Elf64_Addr) &_dl_runtime_profile;
|
||||||
|
#endif
|
||||||
|
|
||||||
if (GLRO(dl_profile) != NULL
|
if (GLRO(dl_profile) != NULL
|
||||||
&& _dl_name_match_p (GLRO(dl_profile), l))
|
&& _dl_name_match_p (GLRO(dl_profile), l))
|
||||||
@ -114,9 +126,18 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
|||||||
GL(dl_profile_map) = l;
|
GL(dl_profile_map) = l;
|
||||||
}
|
}
|
||||||
else
|
else
|
||||||
/* This function will get called to fix up the GOT entry indicated by
|
{
|
||||||
the offset on the stack, and then jump to the resolved address. */
|
/* This function will get called to fix up the GOT entry indicated by
|
||||||
got[2] = (Elf64_Addr) &_dl_runtime_resolve;
|
the offset on the stack, and then jump to the resolved address. */
|
||||||
|
#if defined HAVE_S390_VX_ASM_SUPPORT
|
||||||
|
if (GLRO(dl_hwcap) & HWCAP_S390_VX)
|
||||||
|
got[2] = (Elf64_Addr) &_dl_runtime_resolve_vx;
|
||||||
|
else
|
||||||
|
got[2] = (Elf64_Addr) &_dl_runtime_resolve;
|
||||||
|
#else
|
||||||
|
got[2] = (Elf64_Addr) &_dl_runtime_resolve;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
return lazy;
|
return lazy;
|
||||||
|
|||||||
@ -16,126 +16,18 @@
|
|||||||
License along with the GNU C Library; if not, see
|
License along with the GNU C Library; if not, see
|
||||||
<http://www.gnu.org/licenses/>. */
|
<http://www.gnu.org/licenses/>. */
|
||||||
|
|
||||||
/* The PLT stubs will call _dl_runtime_resolve/_dl_runtime_profile
|
|
||||||
* with the following linkage:
|
|
||||||
* r2 - r6 : parameter registers
|
|
||||||
* f0, f2, f4, f6 : floating point parameter registers
|
|
||||||
* 48(r15), 56(r15) : PLT arguments PLT1, PLT2
|
|
||||||
* 160(r15) : additional stack parameters
|
|
||||||
* The normal clobber rules for function calls apply:
|
|
||||||
* r0 - r5 : call clobbered
|
|
||||||
* r6 - r13 : call saved
|
|
||||||
* r14 : return address (call clobbered)
|
|
||||||
* r15 : stack pointer (call saved)
|
|
||||||
* f1, f3, f5, f7 : call saved
|
|
||||||
* f0 - f3, f5, f7 - f15 : call clobbered
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <sysdep.h>
|
#include <sysdep.h>
|
||||||
|
|
||||||
.text
|
.text
|
||||||
.globl _dl_runtime_resolve
|
/* Create variant of _dl_runtime_resolve/profile for machines before z13.
|
||||||
.type _dl_runtime_resolve, @function
|
No vector registers are saved/restored. */
|
||||||
cfi_startproc
|
#include <dl-trampoline.h>
|
||||||
.align 16
|
|
||||||
_dl_runtime_resolve:
|
|
||||||
stmg %r2,%r5,64(15) # save call-clobbered argument registers
|
|
||||||
stg %r14,96(15)
|
|
||||||
cfi_offset (r14, -64)
|
|
||||||
lgr %r0,%r15
|
|
||||||
aghi %r15,-160 # create stack frame
|
|
||||||
cfi_adjust_cfa_offset (160)
|
|
||||||
stg %r0,0(%r15) # write backchain
|
|
||||||
lmg %r2,%r3,208(%r15)# load args saved by PLT
|
|
||||||
brasl %r14,_dl_fixup # call fixup
|
|
||||||
lgr %r1,%r2 # function addr returned in r2
|
|
||||||
aghi %r15,160 # remove stack frame
|
|
||||||
cfi_adjust_cfa_offset (-160)
|
|
||||||
lg %r14,96(15) # restore registers
|
|
||||||
lmg %r2,%r5,64(15)
|
|
||||||
br %r1
|
|
||||||
cfi_endproc
|
|
||||||
.size _dl_runtime_resolve, .-_dl_runtime_resolve
|
|
||||||
|
|
||||||
|
#if defined HAVE_S390_VX_ASM_SUPPORT
|
||||||
#ifndef PROF
|
/* Create variant of _dl_runtime_resolve/profile for z13 and newer.
|
||||||
.globl _dl_runtime_profile
|
The vector registers are saved/restored, too.*/
|
||||||
.type _dl_runtime_profile, @function
|
# define _dl_runtime_resolve _dl_runtime_resolve_vx
|
||||||
cfi_startproc
|
# define _dl_runtime_profile _dl_runtime_profile_vx
|
||||||
.align 16
|
# define RESTORE_VRS
|
||||||
_dl_runtime_profile:
|
# include <dl-trampoline.h>
|
||||||
stmg %r2,%r6,64(%r15) # save call-clobbered arg regs
|
|
||||||
std %f0,104(%r15) # + r6 needed as arg for
|
|
||||||
std %f2,112(%r15) # _dl_profile_fixup
|
|
||||||
std %f4,120(%r15)
|
|
||||||
std %f6,128(%r15)
|
|
||||||
stg %r12,24(%r15) # r12 is used as backup of r15
|
|
||||||
stg %r14,32(%r15)
|
|
||||||
cfi_offset (r6, -96)
|
|
||||||
cfi_offset (f0, -56)
|
|
||||||
cfi_offset (f2, -48)
|
|
||||||
cfi_offset (f4, -40)
|
|
||||||
cfi_offset (f6, -32)
|
|
||||||
cfi_offset (r12, -136)
|
|
||||||
cfi_offset (r14, -128)
|
|
||||||
lgr %r12,%r15 # backup stack pointer
|
|
||||||
cfi_def_cfa_register (12)
|
|
||||||
aghi %r15,-160 # create stack frame
|
|
||||||
stg %r12,0(%r15) # save backchain
|
|
||||||
lmg %r2,%r3,48(%r12) # load arguments saved by PLT
|
|
||||||
lgr %r4,%r14 # return address as third parameter
|
|
||||||
la %r5,64(%r12) # pointer to struct La_s390_32_regs
|
|
||||||
la %r6,40(%r12) # long int * framesize
|
|
||||||
brasl %r14,_dl_profile_fixup # call resolver
|
|
||||||
lgr %r1,%r2 # function addr returned in r2
|
|
||||||
lg %r0,40(%r12) # load framesize
|
|
||||||
ltgr %r0,%r0
|
|
||||||
jnm 1f
|
|
||||||
|
|
||||||
lmg %r2,%r6,64(%r12) # framesize < 0 means no pltexit call
|
|
||||||
ld %f0,104(%r12) # so we can do a tail call without
|
|
||||||
ld %f2,112(%r12) # copying the arg overflow area
|
|
||||||
ld %f4,120(%r12)
|
|
||||||
ld %f6,128(%r12)
|
|
||||||
|
|
||||||
lgr %r15,%r12 # remove stack frame
|
|
||||||
cfi_def_cfa_register (15)
|
|
||||||
lg %r14,32(%r15) # restore registers
|
|
||||||
lg %r12,24(%r15)
|
|
||||||
br %r1 # tail-call to resolved function
|
|
||||||
|
|
||||||
cfi_def_cfa_register (12)
|
|
||||||
1: jz 4f # framesize == 0 ?
|
|
||||||
aghi %r0,7 # align framesize to 8
|
|
||||||
nill %r0,0xfff8
|
|
||||||
slgr %r15,%r0 # make room for framesize bytes
|
|
||||||
stg %r12,0(%r15)
|
|
||||||
la %r2,160(%r15)
|
|
||||||
la %r3,160(%r12)
|
|
||||||
srlg %r0,%r0,3
|
|
||||||
3: mvc 0(8,%r2),0(%r3) # copy additional parameters
|
|
||||||
la %r2,8(%r2)
|
|
||||||
la %r3,8(%r3)
|
|
||||||
brctg %r0,3b
|
|
||||||
4: lmg %r2,%r6,64(%r12) # load register parameters
|
|
||||||
ld %f0,104(%r12) # restore call-clobbered arg regs
|
|
||||||
ld %f2,112(%r12)
|
|
||||||
ld %f4,120(%r12)
|
|
||||||
ld %f6,128(%r12)
|
|
||||||
basr %r14,%r1 # call resolved function
|
|
||||||
stg %r2,136(%r12)
|
|
||||||
std %f0,144(%r12)
|
|
||||||
lmg %r2,%r3,48(%r12) # load arguments saved by PLT
|
|
||||||
la %r4,32(%r12) # pointer to struct La_s390_32_regs
|
|
||||||
la %r5,72(%r12) # pointer to struct La_s390_32_retval
|
|
||||||
brasl %r14,_dl_call_pltexit
|
|
||||||
|
|
||||||
lgr %r15,%r12 # remove stack frame
|
|
||||||
cfi_def_cfa_register (15)
|
|
||||||
lg %r14,32(%r15) # restore registers
|
|
||||||
lg %r12,24(%r15)
|
|
||||||
br %r14
|
|
||||||
|
|
||||||
cfi_endproc
|
|
||||||
.size _dl_runtime_profile, .-_dl_runtime_profile
|
|
||||||
#endif
|
#endif
|
||||||
|
|||||||
211
sysdeps/s390/s390-64/dl-trampoline.h
Normal file
211
sysdeps/s390/s390-64/dl-trampoline.h
Normal file
@ -0,0 +1,211 @@
|
|||||||
|
/* PLT trampolines. s390x version.
|
||||||
|
Copyright (C) 2016 Free Software Foundation, Inc.
|
||||||
|
This file is part of the GNU C Library.
|
||||||
|
|
||||||
|
The GNU C Library is free software; you can redistribute it and/or
|
||||||
|
modify it under the terms of the GNU Lesser General Public
|
||||||
|
License as published by the Free Software Foundation; either
|
||||||
|
version 2.1 of the License, or (at your option) any later version.
|
||||||
|
|
||||||
|
The GNU C Library is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
Lesser General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU Lesser General Public
|
||||||
|
License along with the GNU C Library; if not, see
|
||||||
|
<http://www.gnu.org/licenses/>. */
|
||||||
|
|
||||||
|
/* The PLT stubs will call _dl_runtime_resolve/_dl_runtime_profile
|
||||||
|
* with the following linkage:
|
||||||
|
* r2 - r6 : parameter registers
|
||||||
|
* f0, f2, f4, f6 : floating point parameter registers
|
||||||
|
* v24, v26, v28, v30, v25, v27, v29, v31 : vector parameter registers
|
||||||
|
* 48(r15), 56(r15) : PLT arguments PLT1, PLT2
|
||||||
|
* 160(r15) : additional stack parameters
|
||||||
|
* The normal clobber rules for function calls apply:
|
||||||
|
* r0 - r5 : call clobbered
|
||||||
|
* r6 - r13 : call saved
|
||||||
|
* r14 : return address (call clobbered)
|
||||||
|
* r15 : stack pointer (call saved)
|
||||||
|
* f0 - f7 : call clobbered
|
||||||
|
* f8 - f15 : call saved
|
||||||
|
* v0 - v7 : bytes 0-7 overlap with f0-f7: call clobbered
|
||||||
|
bytes 8-15: call clobbered
|
||||||
|
* v8 - v15 : bytes 0-7 overlap with f8-f15: call saved
|
||||||
|
bytes 8-15: call clobbered
|
||||||
|
* v16 - v31 : call clobbered
|
||||||
|
*/
|
||||||
|
|
||||||
|
.globl _dl_runtime_resolve
|
||||||
|
.type _dl_runtime_resolve, @function
|
||||||
|
cfi_startproc
|
||||||
|
.align 16
|
||||||
|
_dl_runtime_resolve:
|
||||||
|
stmg %r2,%r5,64(%r15) # save call-clobbered argument registers
|
||||||
|
cfi_offset (r2, -96)
|
||||||
|
cfi_offset (r3, -88)
|
||||||
|
cfi_offset (r4, -80)
|
||||||
|
cfi_offset (r5, -72)
|
||||||
|
std %f0,104(%r15)
|
||||||
|
cfi_offset (f0, -56)
|
||||||
|
std %f2,112(%r15)
|
||||||
|
cfi_offset (f2, -48)
|
||||||
|
std %f4,120(%r15)
|
||||||
|
cfi_offset (f4, -40)
|
||||||
|
std %f6,128(%r15)
|
||||||
|
cfi_offset (f6, -32)
|
||||||
|
stg %r14,96(15)
|
||||||
|
cfi_offset (r14, -64)
|
||||||
|
lmg %r2,%r3,48(%r15) # load args for fixup saved by PLT
|
||||||
|
lgr %r0,%r15
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
aghi %r15,-288 # create stack frame
|
||||||
|
cfi_adjust_cfa_offset (288)
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
vstm %v24,%v31,160(%r15)# store call-clobbered vector argument registers
|
||||||
|
cfi_offset (v24, -288)
|
||||||
|
cfi_offset (v25, -272)
|
||||||
|
cfi_offset (v26, -256)
|
||||||
|
cfi_offset (v27, -240)
|
||||||
|
cfi_offset (v28, -224)
|
||||||
|
cfi_offset (v29, -208)
|
||||||
|
cfi_offset (v30, -192)
|
||||||
|
cfi_offset (v31, -176)
|
||||||
|
.machine pop
|
||||||
|
#else
|
||||||
|
aghi %r15,-160 # create stack frame
|
||||||
|
cfi_adjust_cfa_offset (160)
|
||||||
|
#endif
|
||||||
|
stg %r0,0(%r15) # write backchain
|
||||||
|
brasl %r14,_dl_fixup # call _dl_fixup
|
||||||
|
lgr %r1,%r2 # function addr returned in r2
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
vlm %v24,%v31,160(%r15)# restore vector registers
|
||||||
|
.machine pop
|
||||||
|
aghi %r15,288 # remove stack frame
|
||||||
|
cfi_adjust_cfa_offset (-288)
|
||||||
|
#else
|
||||||
|
aghi %r15,160 # remove stack frame
|
||||||
|
cfi_adjust_cfa_offset (-160)
|
||||||
|
#endif
|
||||||
|
lg %r14,96(%r15) # restore registers
|
||||||
|
ld %f0,104(%r15)
|
||||||
|
ld %f2,112(%r15)
|
||||||
|
ld %f4,120(%r15)
|
||||||
|
ld %f6,128(%r15)
|
||||||
|
lmg %r2,%r5,64(%r15)
|
||||||
|
br %r1
|
||||||
|
cfi_endproc
|
||||||
|
.size _dl_runtime_resolve, .-_dl_runtime_resolve
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef PROF
|
||||||
|
.globl _dl_runtime_profile
|
||||||
|
.type _dl_runtime_profile, @function
|
||||||
|
cfi_startproc
|
||||||
|
.align 16
|
||||||
|
_dl_runtime_profile:
|
||||||
|
stmg %r2,%r6,64(%r15) # save call-clobbered arg regs
|
||||||
|
cfi_offset (r2, -96) # + r6 needed as arg for
|
||||||
|
cfi_offset (r3, -88) # _dl_profile_fixup
|
||||||
|
cfi_offset (r4, -80)
|
||||||
|
cfi_offset (r5, -72)
|
||||||
|
cfi_offset (r6, -64)
|
||||||
|
std %f0,104(%r15)
|
||||||
|
cfi_offset (f0, -56)
|
||||||
|
std %f2,112(%r15)
|
||||||
|
cfi_offset (f2, -48)
|
||||||
|
std %f4,120(%r15)
|
||||||
|
cfi_offset (f4, -40)
|
||||||
|
std %f6,128(%r15)
|
||||||
|
cfi_offset (f6, -32)
|
||||||
|
stg %r12,24(%r15) # r12 is used as backup of r15
|
||||||
|
cfi_offset (r12, -136)
|
||||||
|
stg %r14,32(%r15)
|
||||||
|
cfi_offset (r14, -128)
|
||||||
|
lgr %r12,%r15 # backup stack pointer
|
||||||
|
cfi_def_cfa_register (12)
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
aghi %r15,-288 # create stack frame
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
vstm %v24,%v31,160(%r15)# store call-clobbered vector argument registers
|
||||||
|
cfi_offset (v24, -288)
|
||||||
|
cfi_offset (v25, -272)
|
||||||
|
cfi_offset (v26, -256)
|
||||||
|
cfi_offset (v27, -240)
|
||||||
|
cfi_offset (v28, -224)
|
||||||
|
cfi_offset (v29, -208)
|
||||||
|
cfi_offset (v30, -192)
|
||||||
|
cfi_offset (v31, -176)
|
||||||
|
.machine pop
|
||||||
|
#else
|
||||||
|
aghi %r15,-160 # create stack frame
|
||||||
|
#endif
|
||||||
|
stg %r12,0(%r15) # save backchain
|
||||||
|
lmg %r2,%r3,48(%r12) # load arguments saved by PLT
|
||||||
|
lgr %r4,%r14 # return address as third parameter
|
||||||
|
la %r5,64(%r12) # pointer to struct La_s390_64_regs
|
||||||
|
la %r6,40(%r12) # long int * framesize
|
||||||
|
brasl %r14,_dl_profile_fixup # call resolver
|
||||||
|
lgr %r1,%r2 # function addr returned in r2
|
||||||
|
ld %f0,104(%r12) # restore call-clobbered arg fprs
|
||||||
|
ld %f2,112(%r12)
|
||||||
|
ld %f4,120(%r12)
|
||||||
|
ld %f6,128(%r12)
|
||||||
|
#ifdef RESTORE_VRS
|
||||||
|
.machine push
|
||||||
|
.machine "z13"
|
||||||
|
vlm %v24,%v31,160(%r15) # restore call-clobbered arg vrs
|
||||||
|
.machine pop
|
||||||
|
#endif
|
||||||
|
lg %r0,40(%r12) # load framesize
|
||||||
|
ltgr %r0,%r0
|
||||||
|
jnm 1f
|
||||||
|
|
||||||
|
lmg %r2,%r6,64(%r12) # framesize < 0 means no pltexit call
|
||||||
|
# so we can do a tail call without
|
||||||
|
# copying the arg overflow area
|
||||||
|
lgr %r15,%r12 # remove stack frame
|
||||||
|
cfi_def_cfa_register (15)
|
||||||
|
lg %r14,32(%r15) # restore registers
|
||||||
|
lg %r12,24(%r15)
|
||||||
|
br %r1 # tail-call to resolved function
|
||||||
|
|
||||||
|
cfi_def_cfa_register (12)
|
||||||
|
1: jz 4f # framesize == 0 ?
|
||||||
|
aghi %r0,7 # align framesize to 8
|
||||||
|
nill %r0,0xfff8
|
||||||
|
slgr %r15,%r0 # make room for framesize bytes
|
||||||
|
stg %r12,0(%r15) # save backchain
|
||||||
|
la %r2,160(%r15)
|
||||||
|
la %r3,160(%r12)
|
||||||
|
srlg %r0,%r0,3
|
||||||
|
3: mvc 0(8,%r2),0(%r3) # copy additional parameters
|
||||||
|
la %r2,8(%r2) # depending on framesize
|
||||||
|
la %r3,8(%r3)
|
||||||
|
brctg %r0,3b
|
||||||
|
4: lmg %r2,%r6,64(%r12) # restore call-clobbered arg gprs
|
||||||
|
basr %r14,%r1 # call resolved function
|
||||||
|
stg %r2,136(%r12) # store return values r2, f0
|
||||||
|
std %f0,144(%r12) # to struct La_s390_64_retval
|
||||||
|
lmg %r2,%r3,48(%r12) # load arguments saved by PLT
|
||||||
|
la %r4,64(%r12) # pointer to struct La_s390_64_regs
|
||||||
|
la %r5,136(%r12) # pointer to struct La_s390_64_retval
|
||||||
|
brasl %r14,_dl_call_pltexit
|
||||||
|
|
||||||
|
lgr %r15,%r12 # remove stack frame
|
||||||
|
cfi_def_cfa_register (15)
|
||||||
|
lg %r14,32(%r15) # restore registers
|
||||||
|
lg %r12,24(%r15)
|
||||||
|
lg %r2,136(%r15) # restore return values
|
||||||
|
ld %f0,144(%r15)
|
||||||
|
br %r14 # Jump back to caller
|
||||||
|
|
||||||
|
cfi_endproc
|
||||||
|
.size _dl_runtime_profile, .-_dl_runtime_profile
|
||||||
|
#endif
|
||||||
Loading…
x
Reference in New Issue
Block a user