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Diffstat (limited to 'sysdeps/ia64/dl-trampoline.S')
| -rw-r--r-- | sysdeps/ia64/dl-trampoline.S | 537 |
1 files changed, 0 insertions, 537 deletions
diff --git a/sysdeps/ia64/dl-trampoline.S b/sysdeps/ia64/dl-trampoline.S deleted file mode 100644 index b7969a6cf0..0000000000 --- a/sysdeps/ia64/dl-trampoline.S +++ /dev/null @@ -1,537 +0,0 @@ -/* PLT trampolines. ia64 version. - Copyright (C) 2005 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> -#undef ret - -/* - This code is used in dl-runtime.c to call the `_dl_fixup' function - and then redirect to the address it returns. `_dl_fixup()' takes two - arguments, however _dl_profile_fixup() takes five. - - The ABI specifies that we will never see more than 8 input - registers to a function call, thus it is safe to simply allocate - those, and simpler than playing stack games. */ - -/* Used to save and restore 8 incoming fp registers */ -#define RESOLVE_FRAME_SIZE (16*8) - -ENTRY(_dl_runtime_resolve) - { .mmi - .prologue - .save ar.pfs, r40 - alloc loc0 = ar.pfs, 8, 6, 2, 0 - /* Use the 16 byte scratch area. r2 will start at f8 and - r3 will start at f9. */ - adds r2 = -(RESOLVE_FRAME_SIZE - 16), r12 - adds r3 = -(RESOLVE_FRAME_SIZE - 32), r12 - } - { .mii - .fframe RESOLVE_FRAME_SIZE - adds r12 = -RESOLVE_FRAME_SIZE, r12 - .save rp, loc1 - mov loc1 = b0 - .body - mov loc2 = r8 /* preserve struct value register */ - ;; - } - { .mii - mov loc3 = r9 /* preserve language specific register */ - mov loc4 = r10 /* preserve language specific register */ - mov loc5 = r11 /* preserve language specific register */ - } - { .mmi - stf.spill [r2] = f8, 32 - stf.spill [r3] = f9, 32 - mov out0 = r16 - ;; - } - { .mmi - stf.spill [r2] = f10, 32 - stf.spill [r3] = f11, 32 - shl out1 = r15, 4 - ;; - } - { .mmi - stf.spill [r2] = f12, 32 - stf.spill [r3] = f13, 32 - /* Relocation record is 24 byte. */ - shladd out1 = r15, 3, out1 - ;; - } - { .mmb - stf.spill [r2] = f14 - stf.spill [r3] = f15 - br.call.sptk.many b0 = _dl_fixup - } - { .mii - /* Skip the 16byte scratch area. */ - adds r2 = 16, r12 - adds r3 = 32, r12 - mov b6 = ret0 - ;; - } - { .mmi - ldf.fill f8 = [r2], 32 - ldf.fill f9 = [r3], 32 - mov b0 = loc1 - ;; - } - { .mmi - ldf.fill f10 = [r2], 32 - ldf.fill f11 = [r3], 32 - mov gp = ret1 - ;; - } - { .mmi - ldf.fill f12 = [r2], 32 - ldf.fill f13 = [r3], 32 - mov ar.pfs = loc0 - ;; - } - { .mmi - ldf.fill f14 = [r2], 32 - ldf.fill f15 = [r3], 32 - .restore sp /* pop the unwind frame state */ - adds r12 = RESOLVE_FRAME_SIZE, r12 - ;; - } - { .mii - mov r9 = loc3 /* restore language specific register */ - mov r10 = loc4 /* restore language specific register */ - mov r11 = loc5 /* restore language specific register */ - } - { .mii - mov r8 = loc2 /* restore struct value register */ - ;; - } - /* An alloc is needed for the break system call to work. - We don't care about the old value of the pfs register. */ - { .mmb - .prologue - .body - alloc r2 = ar.pfs, 0, 0, 8, 0 - br.sptk.many b6 - ;; - } -END(_dl_runtime_resolve) - - -/* The fourth argument to _dl_profile_fixup and the third one to - _dl_call_pltexit are a pointer to La_ia64_regs: - - 8byte r8 - 8byte r9 - 8byte r10 - 8byte r11 - 8byte in0 - 8byte in1 - 8byte in2 - 8byte in3 - 8byte in4 - 8byte in5 - 8byte in6 - 8byte in7 - 16byte f8 - 16byte f9 - 16byte f10 - 16byte f11 - 16byte f12 - 16byte f13 - 16byte f14 - 16byte f15 - 8byte ar.unat - 8byte sp - - The fifth argument to _dl_profile_fixup is a pointer to long int. - The fourth argument to _dl_call_pltexit is a pointer to - La_ia64_retval: - - 8byte r8 - 8byte r9 - 8byte r10 - 8byte r11 - 16byte f8 - 16byte f9 - 16byte f10 - 16byte f11 - 16byte f12 - 16byte f13 - 16byte f14 - 16byte f15 - - Since stack has to be 16 byte aligned, the stack allocation is in - 16byte increment. Before calling _dl_profile_fixup, the stack will - look like - - psp new frame_size - +16 La_ia64_regs - sp scratch - - */ - -#define PLTENTER_FRAME_SIZE (4*8 + 8*8 + 8*16 + 2*8 + 16) -#define PLTEXIT_FRAME_SIZE (PLTENTER_FRAME_SIZE + 4*8 + 8*16) - -ENTRY(_dl_runtime_profile) - { .mii - .prologue - .save ar.pfs, r40 - alloc loc0 = ar.pfs, 8, 12, 8, 0 - .vframe loc10 - mov loc10 = r12 - .save rp, loc1 - mov loc1 = b0 - } - { .mii - .save ar.unat, r17 - mov r17 = ar.unat - .save ar.lc, loc6 - mov loc6 = ar.lc - mov loc11 = gp - } - { .mii - .body - /* There is a 16 byte scratch area. r2 will start at r8 and - r3 will start at r9 for La_ia64_regs. */ - adds r2 = -(PLTENTER_FRAME_SIZE - 16), r12 - adds r3 = -(PLTENTER_FRAME_SIZE - 24), r12 - adds r12 = -PLTENTER_FRAME_SIZE, r12 - ;; - } - { .mmi - st8 [r2] = r8, 16; - st8 [r3] = r9, 16; - mov out2 = b0 /* needed by _dl_fixup_profile */ - ;; - } - { .mmi - st8 [r2] = r10, 16; - st8 [r3] = r11, 16; - adds out3 = 16, r12 /* pointer to La_ia64_regs */ - ;; - } - { .mmi - .mem.offset 0, 0 - st8.spill [r2] = in0, 16 - .mem.offset 8, 0 - st8.spill [r3] = in1, 16 - mov out4 = loc10 /* pointer to new frame size */ - ;; - } - { .mmi - .mem.offset 0, 0 - st8.spill [r2] = in2, 16 - .mem.offset 8, 0 - st8.spill [r3] = in3, 16 - mov loc2 = r8 /* preserve struct value register */ - ;; - } - { .mmi - .mem.offset 0, 0 - st8.spill [r2] = in4, 16 - .mem.offset 8, 0 - st8.spill [r3] = in5, 16 - mov loc3 = r9 /* preserve language specific register */ - ;; - } - { .mmi - .mem.offset 0, 0 - st8 [r2] = in6, 16 - .mem.offset 8, 0 - st8 [r3] = in7, 24 /* adjust for f9 */ - mov loc4 = r10 /* preserve language specific register */ - ;; - } - { .mii - mov r18 = ar.unat /* save it in La_ia64_regs */ - mov loc7 = out3 /* save it for _dl_call_pltexit */ - mov loc5 = r11 /* preserve language specific register */ - } - { .mmi - stf.spill [r2] = f8, 32 - stf.spill [r3] = f9, 32 - mov out0 = r16 /* needed by _dl_fixup_profile */ - ;; - } - { .mii - mov ar.unat = r17 /* restore it for function call */ - mov loc8 = r16 /* save it for _dl_call_pltexit */ - nop.i 0x0 - } - { .mmi - stf.spill [r2] = f10, 32 - stf.spill [r3] = f11, 32 - shl out1 = r15, 4 - ;; - } - { .mmi - stf.spill [r2] = f12, 32 - stf.spill [r3] = f13, 32 - /* Relocation record is 24 byte. */ - shladd out1 = r15, 3, out1 - ;; - } - { .mmi - stf.spill [r2] = f14, 32 - stf.spill [r3] = f15, 24 - mov loc9 = out1 /* save it for _dl_call_pltexit */ - ;; - } - { .mmb - st8 [r2] = r18 /* store ar.unat */ - st8 [r3] = loc10 /* store sp */ - br.call.sptk.many b0 = _dl_profile_fixup - } - { .mii - /* Skip the 16byte scratch area, 4 language specific GRs and - 8 incoming GRs to restore incoming fp registers. */ - adds r2 = (4*8 + 8*8 + 16), r12 - adds r3 = (4*8 + 8*8 + 32), r12 - mov b6 = ret0 - ;; - } - { .mmi - ldf.fill f8 = [r2], 32 - ldf.fill f9 = [r3], 32 - mov gp = ret1 - ;; - } - { .mmi - ldf.fill f10 = [r2], 32 - ldf.fill f11 = [r3], 32 - mov r8 = loc2 /* restore struct value register */ - ;; - } - { .mmi - ldf.fill f12 = [r2], 32 - ldf.fill f13 = [r3], 32 - mov r9 = loc3 /* restore language specific register */ - ;; - } - { .mmi - ldf.fill f14 = [r2], 32 - ldf.fill f15 = [r3], 32 - mov r10 = loc4 /* restore language specific register */ - ;; - } - { .mii - ld8 r15 = [loc10] /* load the new frame size */ - mov r11 = loc5 /* restore language specific register */ - ;; - cmp.eq p6, p7 = -1, r15 - ;; - } - { .mii -(p7) cmp.eq p8, p9 = 0, r15 -(p6) mov b0 = loc1 -(p6) mov ar.lc = loc6 - } - { .mib - nop.m 0x0 -(p6) mov ar.pfs = loc0 -(p6) br.cond.dptk.many .Lresolved - ;; - } - - /* At this point, the stack looks like - - +psp free - +16 La_ia64_regs - sp scratch - - We need to keep the current stack and call the resolved - function by copying the r15 byte from sp + PLTENTER_FRAME_SIZE - + 16 (scratch area) to sp + 16 (scratch area). Since stack - has to be 16byte aligned, we around r15 up to 16byte. */ - - { .mbb -(p9) adds r15 = 15, r15 -(p8) br.cond.dptk.many .Lno_new_frame - nop.b 0x0 - ;; - } - { .mmi - and r15 = -16, r15 - ;; - /* We don't copy the 16byte scatch area. Prepare r16/r17 as - destination. */ - sub r16 = r12, r15 - sub r17 = r12, r15 - ;; - } - { .mii - adds r16 = 16, r16 - adds r17 = 24, r17 - sub r12 = r12, r15 /* Adjust stack */ - ;; - } - { .mii - nop.m 0x0 - shr r15 = r15, 4 - ;; - adds r15 = -1, r15 - ;; - } - { .mii - /* Skip the 16byte scatch area. Prepare r2/r3 as source. */ - adds r2 = 16, loc10 - adds r3 = 24, loc10 - mov ar.lc = r15 - ;; - } -.Lcopy: - { .mmi - ld8 r18 = [r2], 16 - ld8 r19 = [r3], 16 - nop.i 0x0 - ;; - } - { .mmb - st8 [r16] = r18, 16 - st8 [r17] = r19, 16 - br.cloop.sptk.few .Lcopy - } -.Lno_new_frame: - { .mii - mov out0 = in0 - mov out1 = in1 - mov out2 = in2 - } - { .mii - mov out3 = in3 - mov out4 = in4 - mov out5 = in5 - } - { .mib - mov out6 = in6 - mov out7 = in7 - /* Call the resolved function */ - br.call.sptk.many b0 = b6 - } - { .mii - /* Prepare stack for _dl_call_pltexit. Loc10 has the original - stack pointer. */ - adds r12 = -PLTEXIT_FRAME_SIZE, loc10 - adds r2 = -(PLTEXIT_FRAME_SIZE - 16), loc10 - adds r3 = -(PLTEXIT_FRAME_SIZE - 24), loc10 - ;; - } - { .mmi - /* Load all possible return values into buffer. */ - st8 [r2] = r8, 16 - st8 [r3] = r9, 16 - mov out0 = loc8 - ;; - } - { .mmi - st8 [r2] = r10, 16 - st8 [r3] = r11, 24 - mov out1 = loc9 - ;; - } - { .mmi - stf.spill [r2] = f8, 32 - stf.spill [r3] = f9, 32 - mov out2 = loc7 /* Pointer to La_ia64_regs */ - ;; - } - { .mmi - stf.spill [r2] = f10, 32 - stf.spill [r3] = f11, 32 - adds out3 = 16, r12 /* Pointer to La_ia64_retval */ - ;; - } - { .mmi - stf.spill [r2] = f12, 32 - stf.spill [r3] = f13, 32 - /* We need to restore gp for _dl_call_pltexit. */ - mov gp = loc11 - ;; - } - { .mmb - stf.spill [r2] = f14 - stf.spill [r3] = f15 - br.call.sptk.many b0 = _dl_call_pltexit - } - { .mmi - /* Load all the non-floating and floating return values. Skip - the 16byte scratch area. */ - adds r2 = 16, r12 - adds r3 = 24, r12 - nop.i 0x0 - ;; - } - { .mmi - ld8 r8 = [r2], 16 - ld8 r9 = [r3], 16 - nop.i 0x0 - ;; - } - { .mmi - ld8 r10 = [r2], 16 - ld8 r11 = [r3], 24 - nop.i 0x0 - ;; - } - { .mmi - ldf.fill f8 = [r2], 32 - ldf.fill f9 = [r3], 32 - mov ar.lc = loc6 - ;; - } - { .mmi - ldf.fill f10 = [r2], 32 - ldf.fill f11 = [r3], 32 - mov ar.pfs = loc0 - ;; - } - { .mmi - ldf.fill f12 = [r2], 32 - ldf.fill f13 = [r3], 32 - mov b0 = loc1 - ;; - } - { .mmi - ldf.fill f14 = [r2] - ldf.fill f15 = [r3] - /* We know that the previous stack pointer, loc10, isn't 0. - We use it to reload p7. */ - cmp.ne p7, p0 = 0, loc10 - ;; - } -.Lresolved: - { .mmb - .restore sp - mov r12 = loc10 -(p7) br.ret.sptk.many b0 - ;; - } - /* An alloc is needed for the break system call to work. We - don't care about the old value of the pfs register. After - this alloc, we can't use any rotating registers. Otherwise - assembler won't be happy. This has to be at the end. */ - { .mmb - .prologue - .body - alloc r2 = ar.pfs, 0, 0, 8, 0 - br.sptk.many b6 - ;; - } -END(_dl_runtime_profile) |