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892 lines
29 KiB
892 lines
29 KiB
7 years ago
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commit 4603c51ef7989d7eb800cdd6f42aab206f891077
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Author: Stefan Liebler <stli@linux.vnet.ibm.com>
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Date: Thu Mar 31 17:37:16 2016 +0200
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S390: Save and restore fprs/vrs while resolving symbols.
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On s390, no fpr/vrs were saved while resolving a symbol
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via _dl_runtime_resolve/_dl_runtime_profile.
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According to the abi, the fpr-arguments are defined as call clobbered.
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In leaf-functions, gcc 4.9 and newer can use fprs for saving/restoring gprs
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instead of saving them to the stack.
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If gcc do this in one of the resolver-functions, then the floating point
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arguments of a library-function are invalid for the first library-function-call.
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Thus, this patch saves/restores the fprs around the resolving code.
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The same could occur for vector registers. Furthermore an ifunc-resolver
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could also clobber the vector/floating point argument registers.
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Thus this patch provides the further variants _dl_runtime_resolve_vx/
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_dl_runtime_profile_vx, which are used if the kernel claims, that
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we run on a machine with vector registers.
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Furthermore, if _dl_runtime_profile calls _dl_call_pltexit,
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the pointers to inregs-/outregs-structs were setup invalid.
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Now they point to the correct location in the stack-frame.
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Before branching back to the caller, the return values are now
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restored instead of containing the return values of the
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_dl_call_pltexit() call.
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On s390-32, an endless loop occurs if _dl_call_pltexit() should be called.
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Now, this code-path branches to this function instead of just after the
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preceding basr-instruction.
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ChangeLog:
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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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diff --git a/sysdeps/s390/s390-32/dl-machine.h b/sysdeps/s390/s390-32/dl-machine.h
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index 14bde3b..ec0ae4a 100644
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--- a/sysdeps/s390/s390-32/dl-machine.h
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+++ b/sysdeps/s390/s390-32/dl-machine.h
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@@ -89,6 +89,11 @@
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{
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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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+#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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+
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if (l->l_info[DT_JMPREL] && lazy)
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{
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@@ -116,7 +121,14 @@
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end in this function. */
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if (__builtin_expect (profile, 0))
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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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+#endif
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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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@@ -125,9 +137,18 @@
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GL(dl_profile_map) = l;
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}
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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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- the offset on the stack, and then jump to the resolved address. */
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- got[2] = (Elf32_Addr) &_dl_runtime_resolve;
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+ {
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+ /* This function will get called to fix up the GOT entry indicated by
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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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return lazy;
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diff --git a/sysdeps/s390/s390-32/dl-trampoline.S b/sysdeps/s390/s390-32/dl-trampoline.S
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index 1645610..859183c 100644
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--- a/sysdeps/s390/s390-32/dl-trampoline.S
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+++ b/sysdeps/s390/s390-32/dl-trampoline.S
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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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<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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-
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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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-
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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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- 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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-
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-
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-#ifndef PROF
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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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- 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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-
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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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-
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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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-
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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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-
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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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+/* Create variant of _dl_runtime_resolve/profile for machines before z13.
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+ No vector registers are saved/restored. */
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+#include <dl-trampoline.h>
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+
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+#if defined HAVE_S390_VX_ASM_SUPPORT
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+/* Create variant of _dl_runtime_resolve/profile for z13 and newer.
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+ The vector registers are saved/restored, too.*/
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+# define _dl_runtime_resolve _dl_runtime_resolve_vx
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+# define _dl_runtime_profile _dl_runtime_profile_vx
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+# define RESTORE_VRS
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+# include <dl-trampoline.h>
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#endif
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diff --git a/sysdeps/s390/s390-32/dl-trampoline.h b/sysdeps/s390/s390-32/dl-trampoline.h
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new file mode 100644
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index 0000000..a152a7b
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--- /dev/null
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+++ b/sysdeps/s390/s390-32/dl-trampoline.h
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@@ -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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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)
|
||
|
|
+ std %f2,64(%r15)
|
||
|
|
+ cfi_offset (f2, -32)
|
||
|
|
+ st %r14,8(%r15)
|
||
|
|
+ cfi_offset (r14, -88)
|
||
|
|
+ lr %r0,%r15
|
||
|
|
+ lm %r2,%r3,24(%r15) # load args saved by PLT
|
||
|
|
+#ifdef RESTORE_VRS
|
||
|
|
+ ahi %r15,-224 # create stack frame
|
||
|
|
+ cfi_adjust_cfa_offset (224)
|
||
|
|
+ .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
|
||
|
|
+ cfi_adjust_cfa_offset (96)
|
||
|
|
+#endif
|
||
|
|
+ st %r0,0(%r15) # write backchain
|
||
|
|
+ basr %r1,0
|
||
|
|
+0: l %r14,1f-0b(%r1)
|
||
|
|
+ bas %r14,0(%r14,%r1) # call _dl_fixup
|
||
|
|
+ lr %r1,%r2 # function addr returned in r2
|
||
|
|
+#ifdef RESTORE_VRS
|
||
|
|
+ .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
|
||
|
|
diff --git a/sysdeps/s390/s390-64/dl-machine.h b/sysdeps/s390/s390-64/dl-machine.h
|
||
|
|
index cb81aaf..9ee7c92 100644
|
||
|
|
--- a/sysdeps/s390/s390-64/dl-machine.h
|
||
|
|
+++ b/sysdeps/s390/s390-64/dl-machine.h
|
||
|
|
@@ -26,6 +26,7 @@
|
||
|
|
#include <sys/param.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <link.h>
|
||
|
|
+#include <sysdeps/s390/dl-procinfo.h>
|
||
|
|
#include <dl-irel.h>
|
||
|
|
|
||
|
|
#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_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)
|
||
|
|
{
|
||
|
|
@@ -105,7 +110,14 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
|
||
|
|
end in this function. */
|
||
|
|
if (__builtin_expect (profile, 0))
|
||
|
|
{
|
||
|
|
+#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;
|
||
|
|
+#endif
|
||
|
|
|
||
|
|
if (GLRO(dl_profile) != NULL
|
||
|
|
&& _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;
|
||
|
|
}
|
||
|
|
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. */
|
||
|
|
- got[2] = (Elf64_Addr) &_dl_runtime_resolve;
|
||
|
|
+ {
|
||
|
|
+ /* 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. */
|
||
|
|
+#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;
|
||
|
|
diff --git a/sysdeps/s390/s390-64/dl-trampoline.S b/sysdeps/s390/s390-64/dl-trampoline.S
|
||
|
|
index 6919ed0..1b0c9e2 100644
|
||
|
|
--- a/sysdeps/s390/s390-64/dl-trampoline.S
|
||
|
|
+++ b/sysdeps/s390/s390-64/dl-trampoline.S
|
||
|
|
@@ -16,126 +16,18 @@
|
||
|
|
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
|
||
|
|
- * 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>
|
||
|
|
|
||
|
|
.text
|
||
|
|
- .globl _dl_runtime_resolve
|
||
|
|
- .type _dl_runtime_resolve, @function
|
||
|
|
- cfi_startproc
|
||
|
|
- .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
|
||
|
|
-
|
||
|
|
-
|
||
|
|
-#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
|
||
|
|
- 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
|
||
|
|
+/* Create variant of _dl_runtime_resolve/profile for machines before z13.
|
||
|
|
+ No vector registers are saved/restored. */
|
||
|
|
+#include <dl-trampoline.h>
|
||
|
|
+
|
||
|
|
+#if defined HAVE_S390_VX_ASM_SUPPORT
|
||
|
|
+/* Create variant of _dl_runtime_resolve/profile for z13 and newer.
|
||
|
|
+ The vector registers are saved/restored, too.*/
|
||
|
|
+# define _dl_runtime_resolve _dl_runtime_resolve_vx
|
||
|
|
+# define _dl_runtime_profile _dl_runtime_profile_vx
|
||
|
|
+# define RESTORE_VRS
|
||
|
|
+# include <dl-trampoline.h>
|
||
|
|
#endif
|
||
|
|
diff --git a/sysdeps/s390/s390-64/dl-trampoline.h b/sysdeps/s390/s390-64/dl-trampoline.h
|
||
|
|
new file mode 100644
|
||
|
|
index 0000000..658e3a3
|
||
|
|
--- /dev/null
|
||
|
|
+++ b/sysdeps/s390/s390-64/dl-trampoline.h
|
||
|
|
@@ -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
|