e0b1f39d55
<asm/sigcontext.h> is used by glibc's <bits/sigcontext.h> from <signal.h>, which means that it can't clutter the namespace with random symbols or #defines. However, we use <arch/abi.h> to get a suitable type to hold a machine register. This change makes <arch/abi.h> safe to use in this kind of context if __need_int_reg_t is defined prior to including the file; in that case, it only defines a few symbols that are safe in the ISO namespace (prefixed with double underscores). <asm/sigcontext.h> then uses the __uint_reg_t type instead of the normal uint_reg_t. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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/**
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* @file
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*
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* ABI-related register definitions.
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*/
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#ifndef __ARCH_ABI_H__
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#if !defined __need_int_reg_t && !defined __DOXYGEN__
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# define __ARCH_ABI_H__
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# include <arch/chip.h>
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#endif
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/* Provide the basic machine types. */
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#ifndef __INT_REG_BITS
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/** Number of bits in a register. */
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#if defined __tilegx__
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# define __INT_REG_BITS 64
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#elif defined __tilepro__
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# define __INT_REG_BITS 32
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#elif !defined __need_int_reg_t
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# include <arch/chip.h>
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# define __INT_REG_BITS CHIP_WORD_SIZE()
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#else
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# error Unrecognized architecture with __need_int_reg_t
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#endif
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#if __INT_REG_BITS == 64
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#ifndef __ASSEMBLER__
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/** Unsigned type that can hold a register. */
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typedef unsigned long long __uint_reg_t;
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/** Signed type that can hold a register. */
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typedef long long __int_reg_t;
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#endif
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/** String prefix to use for printf(). */
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#define __INT_REG_FMT "ll"
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#else
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#ifndef __ASSEMBLER__
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/** Unsigned type that can hold a register. */
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typedef unsigned long __uint_reg_t;
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/** Signed type that can hold a register. */
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typedef long __int_reg_t;
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#endif
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/** String prefix to use for printf(). */
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#define __INT_REG_FMT "l"
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#endif
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#endif /* __INT_REG_BITS */
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#ifndef __need_int_reg_t
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#ifndef __ASSEMBLER__
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/** Unsigned type that can hold a register. */
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typedef __uint_reg_t uint_reg_t;
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/** Signed type that can hold a register. */
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typedef __int_reg_t int_reg_t;
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#endif
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/** String prefix to use for printf(). */
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#define INT_REG_FMT __INT_REG_FMT
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/** Number of bits in a register. */
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#define INT_REG_BITS __INT_REG_BITS
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/* Registers 0 - 55 are "normal", but some perform special roles. */
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#define TREG_FP 52 /**< Frame pointer. */
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#define TREG_TP 53 /**< Thread pointer. */
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#define TREG_SP 54 /**< Stack pointer. */
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#define TREG_LR 55 /**< Link to calling function PC. */
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/** Index of last normal general-purpose register. */
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#define TREG_LAST_GPR 55
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/* Registers 56 - 62 are "special" network registers. */
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#define TREG_SN 56 /**< Static network access. */
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#define TREG_IDN0 57 /**< IDN demux 0 access. */
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#define TREG_IDN1 58 /**< IDN demux 1 access. */
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#define TREG_UDN0 59 /**< UDN demux 0 access. */
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#define TREG_UDN1 60 /**< UDN demux 1 access. */
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#define TREG_UDN2 61 /**< UDN demux 2 access. */
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#define TREG_UDN3 62 /**< UDN demux 3 access. */
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/* Register 63 is the "special" zero register. */
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#define TREG_ZERO 63 /**< "Zero" register; always reads as "0". */
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/** By convention, this register is used to hold the syscall number. */
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#define TREG_SYSCALL_NR 10
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/** Name of register that holds the syscall number, for use in assembly. */
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#define TREG_SYSCALL_NR_NAME r10
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/**
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* The ABI requires callers to allocate a caller state save area of
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* this many bytes at the bottom of each stack frame.
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*/
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#define C_ABI_SAVE_AREA_SIZE (2 * (INT_REG_BITS / 8))
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/**
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* The operand to an 'info' opcode directing the backtracer to not
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* try to find the calling frame.
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*/
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#define INFO_OP_CANNOT_BACKTRACE 2
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#endif /* !__need_int_reg_t */
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/* Make sure we later can get all the definitions and declarations. */
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#undef __need_int_reg_t
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#endif /* !__ARCH_ABI_H__ */
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