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Diffstat (limited to 'ports/sysdeps/arm/sysdep.h')
| -rw-r--r-- | ports/sysdeps/arm/sysdep.h | 288 |
1 files changed, 0 insertions, 288 deletions
diff --git a/ports/sysdeps/arm/sysdep.h b/ports/sysdeps/arm/sysdep.h deleted file mode 100644 index 7f34ab042f..0000000000 --- a/ports/sysdeps/arm/sysdep.h +++ /dev/null @@ -1,288 +0,0 @@ -/* Assembler macros for ARM. - Copyright (C) 1997-2014 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/>. */ - -#include <sysdeps/generic/sysdep.h> -#include <features.h> - -/* The __ARM_ARCH define is provided by gcc 4.8. Construct it otherwise. */ -#ifndef __ARM_ARCH -# ifdef __ARM_ARCH_2__ -# define __ARM_ARCH 2 -# elif defined (__ARM_ARCH_3__) || defined (__ARM_ARCH_3M__) -# define __ARM_ARCH 3 -# elif defined (__ARM_ARCH_4__) || defined (__ARM_ARCH_4T__) -# define __ARM_ARCH 4 -# elif defined (__ARM_ARCH_5__) || defined (__ARM_ARCH_5E__) \ - || defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5TE__) \ - || defined(__ARM_ARCH_5TEJ__) -# define __ARM_ARCH 5 -# elif defined (__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ - || defined (__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \ - || defined (__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) -# define __ARM_ARCH 6 -# elif defined (__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ - || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ - || defined(__ARM_ARCH_7EM__) -# define __ARM_ARCH 7 -# else -# error unknown arm architecture -# endif -#endif - -#if __ARM_ARCH > 4 || defined (__ARM_ARCH_4T__) -# define ARCH_HAS_BX -#endif -#if __ARM_ARCH > 4 -# define ARCH_HAS_BLX -#endif -#if __ARM_ARCH > 6 || defined (__ARM_ARCH_6K__) || defined (__ARM_ARCH_6ZK__) -# define ARCH_HAS_HARD_TP -#endif -#if __ARM_ARCH > 6 || defined (__ARM_ARCH_6T2__) -# define ARCH_HAS_T2 -#endif - -#ifdef __ASSEMBLER__ - -/* Syntactic details of assembler. */ - -#define ALIGNARG(log2) log2 -#define ASM_SIZE_DIRECTIVE(name) .size name,.-name - -#define PLTJMP(_x) _x##(PLT) - -#ifdef ARCH_HAS_BX -# define BX(R) bx R -# define BXC(C, R) bx##C R -# ifdef ARCH_HAS_BLX -# define BLX(R) blx R -# else -# define BLX(R) mov lr, pc; bx R -# endif -#else -# define BX(R) mov pc, R -# define BXC(C, R) mov##C pc, R -# define BLX(R) mov lr, pc; mov pc, R -#endif - -#define DO_RET(R) BX(R) -#define RETINSTR(C, R) BXC(C, R) - -/* Define an entry point visible from C. */ -#define ENTRY(name) \ - .globl C_SYMBOL_NAME(name); \ - .type C_SYMBOL_NAME(name),%function; \ - .align ALIGNARG(4); \ - C_LABEL(name) \ - CFI_SECTIONS; \ - cfi_startproc; \ - CALL_MCOUNT - -#define CFI_SECTIONS \ - .cfi_sections .debug_frame - -#undef END -#define END(name) \ - cfi_endproc; \ - ASM_SIZE_DIRECTIVE(name) - -/* If compiled for profiling, call `mcount' at the start of each function. */ -#ifdef PROF -/* Call __gnu_mcount_nc if GCC >= 4.4. */ -#if __GNUC_PREREQ(4,4) -#define CALL_MCOUNT \ - push {lr}; \ - cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (lr, 0); \ - bl PLTJMP(mcount); \ - cfi_adjust_cfa_offset (-4); \ - cfi_restore (lr) -#else /* else call _mcount */ -#define CALL_MCOUNT \ - push {lr}; \ - cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (lr, 0); \ - bl PLTJMP(mcount); \ - pops {lr}; \ - cfi_adjust_cfa_offset (-4); \ - cfi_restore (lr) -#endif -#else -#define CALL_MCOUNT /* Do nothing. */ -#endif - -/* Since C identifiers are not normally prefixed with an underscore - on this system, the asm identifier `syscall_error' intrudes on the - C name space. Make sure we use an innocuous name. */ -#define syscall_error __syscall_error -#if __GNUC_PREREQ(4,4) -#define mcount __gnu_mcount_nc -#else -#define mcount _mcount -#endif - -/* Tag_ABI_align8_preserved: This code preserves 8-byte - alignment in any callee. */ - .eabi_attribute 25, 1 -/* Tag_ABI_align8_needed: This code may require 8-byte alignment from - the caller. */ - .eabi_attribute 24, 1 - -/* The thumb2 encoding is reasonably complete. Unless suppressed, use it. */ - .syntax unified -# if defined(__thumb2__) && !defined(NO_THUMB) - .thumb -#else -# undef __thumb__ -# undef __thumb2__ - .arm -# endif - -/* Load or store to/from a pc-relative EXPR into/from R, using T. */ -# ifdef __thumb2__ -# define LDST_PCREL(OP, R, T, EXPR) \ - ldr T, 98f; \ - .subsection 2; \ -98: .word EXPR - 99f - PC_OFS; \ - .previous; \ -99: add T, T, pc; \ - OP R, [T] -# else -# define LDST_PCREL(OP, R, T, EXPR) \ - ldr T, 98f; \ - .subsection 2; \ -98: .word EXPR - 99f - PC_OFS; \ - .previous; \ -99: OP R, [pc, T] -# endif - -/* Load or store to/from a global EXPR into/from R, using T. */ -# define LDST_GLOBAL(OP, R, T, EXPR) \ - ldr T, 99f; \ - ldr R, 100f; \ -98: add T, T, pc; \ - ldr T, [T, R]; \ - .subsection 2; \ -99: .word _GLOBAL_OFFSET_TABLE_ - 98b - PC_OFS; \ -100: .word EXPR##(GOT); \ - .previous; \ - OP R, [T] - -/* Cope with negative memory offsets, which thumb can't encode. - Use NEGOFF_ADJ_BASE to (conditionally) alter the base register, - and then NEGOFF_OFF1 to use 0 for thumb and the offset for arm, - or NEGOFF_OFF2 to use A-B for thumb and A for arm. */ -# ifdef __thumb2__ -# define NEGOFF_ADJ_BASE(R, OFF) add R, R, $OFF -# define NEGOFF_ADJ_BASE2(D, S, OFF) add D, S, $OFF -# define NEGOFF_OFF1(R, OFF) [R] -# define NEGOFF_OFF2(R, OFFA, OFFB) [R, $((OFFA) - (OFFB))] -# else -# define NEGOFF_ADJ_BASE(R, OFF) -# define NEGOFF_ADJ_BASE2(D, S, OFF) mov D, S -# define NEGOFF_OFF1(R, OFF) [R, $OFF] -# define NEGOFF_OFF2(R, OFFA, OFFB) [R, $OFFA] -# endif - -/* Helper to get the TLS base pointer. The interface is that TMP is a - register that may be used to hold the LR, if necessary. TMP may be - LR itself to indicate that LR need not be saved. The base pointer - is returned in R0. Only R0 and TMP are modified. */ - -# ifdef ARCH_HAS_HARD_TP -/* If the cpu has cp15 available, use it. */ -# define GET_TLS(TMP) mrc p15, 0, r0, c13, c0, 3 -# else -/* At this generic level we have no tricks to pull. Call the ABI routine. */ -# define GET_TLS(TMP) \ - push { r1, r2, r3, lr }; \ - cfi_remember_state; \ - cfi_adjust_cfa_offset (16); \ - cfi_rel_offset (r1, 0); \ - cfi_rel_offset (r2, 4); \ - cfi_rel_offset (r3, 8); \ - cfi_rel_offset (lr, 12); \ - bl __aeabi_read_tp; \ - pop { r1, r2, r3, lr }; \ - cfi_restore_state -# endif /* ARCH_HAS_HARD_TP */ - -# ifndef ARM_SFI_MACROS -# define ARM_SFI_MACROS 1 -/* This assembly macro is prepended to any load/store instruction, - pulling the base register out of the addressing mode syntax and - making it the first operand of the macro. For example: - ldr r0, [r1] - becomes: - sfi_breg r1, ldr r0, [\B] - The \B stands in for the base register that is the first operand - to the macro, so we can avoid error-prone repetition of the base - register in two places on the line. - - This is used for all memory access through a base register other - than PC or SP. It's intended to support SFI schemes such as - Native Client, where the OS will enforce that all load/store - instructions use a special form. In any such configuration, - another sysdep.h file will have defined ARM_SFI_MACROS and - provided its own assembly macros with the same interface. */ - - .macro sfi_breg basereg, insn, operands:vararg - .macro _sfi_breg_doit B - \insn \operands - .endm - _sfi_breg_doit \basereg - .purgem _sfi_breg_doit - .endm - -/* This assembly macro replaces the "pld" instruction. - The syntax: - sfi_pld REGISTER, #OFFSET - is exactly equivalent to: - sfi_breg REGISTER, pld [\B, #OFFSET] - (and ", #OFFSET" is optional). We have a separate macro - only to work around a bug in GAS versions prior to 2.23.2, - that misparses the sfi_breg macro expansion in this case. */ - - .macro sfi_pld basereg, offset=#0 - pld [\basereg, \offset] - .endm - -/* This macro precedes any instruction that directly changes the SP. - It's not needed for push/pop or for any kind of load or store that - implicitly changes the SP via the ! syntax. */ -# define sfi_sp /* Nothing to do. */ - -# endif - -/* These are the directives used for EABI unwind info. - Wrap them in macros so another configuration's sysdep.h - file can define them away if it doesn't use EABI unwind info. */ -# define eabi_fnstart .fnstart -# define eabi_fnend .fnend -# define eabi_save(...) .save __VA_ARGS__ -# define eabi_cantunwind .cantunwind -# define eabi_pad(n) .pad n - -#endif /* __ASSEMBLER__ */ - -/* This number is the offset from the pc at the current location. */ -#ifdef __thumb__ -# define PC_OFS 4 -#else -# define PC_OFS 8 -#endif |