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Diffstat (limited to 'sysdeps/tile/dl-trampoline.S')
| -rw-r--r-- | sysdeps/tile/dl-trampoline.S | 193 |
1 files changed, 0 insertions, 193 deletions
diff --git a/sysdeps/tile/dl-trampoline.S b/sysdeps/tile/dl-trampoline.S deleted file mode 100644 index 7669d77..0000000 --- a/sysdeps/tile/dl-trampoline.S +++ /dev/null @@ -1,193 +0,0 @@ -/* Copyright (C) 2011-2018 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - 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/>. */ - -#include <sysdep.h> -#include <arch/abi.h> - -/* This function is called via the PLT header, which is called - from an individual PLT entry. - - At this point we have several values passed in: - - lr: return address to original user code - r28: the tpnt value to pass to _dl_runtime_resolver - r29: the PLT index of the invoked jump table entry. - - We set up a frame entry that looks like this (in int_reg_t units): - - +57: r25 return values from function... - +56: r24 - [...] - +33: r1 - +32: r0 - +31: PLT index - +30: tpnt - +29: stackframe - +28: caller lr - +27: r25 arguments to function... - +26: r24 - [...] - +3: r1 - +2: r0 - +1: standard ABI slot (sp) - +0: standard ABI slot (callee lr) - - The entries from "stackframe" up are only used in _dl_profile_resolve. - We save and restore r0 through r25, rather than the strictly - architected r0 through r9, to support unusual calling conventions; - for example, __tls_get_addr takes r0 and returns r0, but promises - not to clobber r1 through r24 to support its usual fast path. */ - -#define FRAME_SP (1 * REGSIZE) -#define FRAME_REGS (2 * REGSIZE) -#define FRAME_LR (28 * REGSIZE) /* Must follow FRAME_REGS */ -#define FRAME_STACKFRAME (29 * REGSIZE) -#define FRAME_TPNT (30 * REGSIZE) -#define FRAME_INDEX (31 * REGSIZE) -#define FRAME_RETVAL (32 * REGSIZE) - -#define FRAME_SIZE_SMALL (30 * REGSIZE) -#define FRAME_SIZE_LARGE (58 * REGSIZE) - -#define FOR_EACH_REG(f) \ - f(r0); f(r1); f(r2); f(r3); \ - f(r4); f(r5); f(r6); f(r7); \ - f(r8); f(r9); f(r10); f(r11); \ - f(r12); f(r13); f(r14); f(r15); \ - f(r16); f(r17); f(r18); f(r19); \ - f(r20); f(r21); f(r22); f(r23); \ - f(r24); f(r25) - -#define SAVE(REG) { st r27, REG; ADDI_PTR r27, r27, REGSIZE } -#define RESTORE(REG) { ld REG, r27; ADDI_PTR r27, r27, REGSIZE } - - .macro dl_resolve, name, profile, framesize -.text -.global \name -.hidden \name -/* Note that cpp expands ENTRY(\name) incorrectly. */ -.type \name,@function -.align 8 -\name: - cfi_startproc - { - st sp, lr - move r26, sp - } - { - ADDLI_PTR sp, sp, -\framesize - ADDLI_PTR r27, sp, FRAME_SP - \framesize - } - cfi_def_cfa_offset (\framesize) - { - st r27, r26 - ADDI_PTR r27, r27, FRAME_REGS - FRAME_SP - } - FOR_EACH_REG(SAVE) - { - st r27, lr - ADDLI_PTR r27, sp, FRAME_TPNT - } - cfi_offset (lr, FRAME_LR - \framesize) - .if \profile - { - move r0, r28 /* tpnt value */ - st r27, r28 - ADDI_PTR r27, r27, FRAME_INDEX - FRAME_TPNT - } - { - move r1, r29 /* PLT index */ - st r27, r29 - } - { - move r2, lr /* retaddr */ - ADDI_PTR r3, sp, FRAME_REGS /* La_tile_regs pointer */ - } - { - ADDLI_PTR r4, sp, FRAME_STACKFRAME /* framesize pointer */ - jal _dl_profile_fixup - } - ADDLI_PTR r28, sp, FRAME_STACKFRAME - LD_PTR r28, r28 - bgtz r28, 1f - .else - { - move r0, r28 /* tpnt value 1 */ - move r1, r29 /* PLT index 2 */ - } - jal _dl_fixup - .endif - { - /* Copy aside the return value so we can restore r0 below. */ - move r29, r0 - /* Set up r27 to let us start restoring registers. */ - ADDLI_PTR r27, sp, FRAME_REGS - } - FOR_EACH_REG(RESTORE) - .if \profile - ADDLI_PTR r28, sp, FRAME_STACKFRAME - ld r28, r28 - bgtz r28, 1f - .endif - { - /* Restore original user return address. */ - ld lr, r27 - /* Pop off our stack frame. */ - ADDLI_PTR sp, sp, \framesize - } - cfi_def_cfa_offset (0) - jr r29 /* Transfer control to freshly loaded code. */ - jrp lr /* Keep backtracer happy. */ - - .if \profile -1: jalr r29 /* Call resolved function. */ - { - ADDLI_PTR r28, sp, FRAME_TPNT - ADDLI_PTR r27, sp, FRAME_RETVAL - } - FOR_EACH_REG(SAVE) - { - ld r0, r28 - ADDI_PTR r28, r28, FRAME_INDEX - FRAME_TPNT - } - { - ld r1, r28 - ADDLI_PTR r2, sp, FRAME_REGS - } - { - ADDLI_PTR r3, sp, FRAME_RETVAL - jal _dl_call_pltexit - } - { - ADDLI_PTR lr, sp, FRAME_LR - ADDLI_PTR r27, sp, FRAME_RETVAL - } - FOR_EACH_REG(RESTORE) - { - ld lr, lr - ADDLI_PTR sp, sp, \framesize - } - jrp lr - .endif -END (\name) - .endm - - dl_resolve _dl_runtime_resolve, 0, FRAME_SIZE_SMALL -#ifndef PROF - dl_resolve _dl_runtime_profile, 1, FRAME_SIZE_LARGE -#endif |