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/**
* @file
*
* @brief Address the Problems Caused by Incompatible Flavor of
* Assemblers and Toolsets
*
* This include file attempts to address the problems
* caused by incompatible flavors of assemblers and
* toolsets. It primarily addresses variations in the
* use of leading underscores on symbols and the requirement
* that register names be preceded by a %.
*
* NOTE: The spacing in the use of these macros
* is critical to them working as advertised.
*/
/*
* COPYRIGHT:
*
* This file is based on similar code found in newlib available
* from ftp.cygnus.com. The file which was used had no copyright
* notice. This file is freely distributable as long as the source
* of the file is noted.
*/
#ifndef _RTEMS_ASM_H
#define _RTEMS_ASM_H
/*
* Indicate we are in an assembly file and get the basic CPU definitions.
*/
#ifndef ASM
#define ASM
#endif
#include <rtems/score/cpuopts.h>
#include <rtems/score/cpu.h>
/**
* @defgroup RTEMSScoreCPUSPARCASM SPARC Assembler Support
*
* @ingroup RTEMSScoreCPUSPARC
*
* @brief SPARC Assembler Support
*
* @{
*/
/*
* Recent versions of GNU cpp define variables which indicate the
* need for underscores and percents. If not using GNU cpp or
* the version does not support this, then you will obviously
* have to define these as appropriate.
*/
/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
/* XXX The following ifdef magic fixes the problem but results in a warning */
/* XXX when compiling assembly code. */
#ifndef __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__ _
#endif
#ifndef __REGISTER_PREFIX__
#define __REGISTER_PREFIX__
#endif
/* Use the right prefix for global labels. */
#define SYM(x) RTEMS_XCONCAT(__USER_LABEL_PREFIX__, x)
/* Use the right prefix for registers. */
#define REG(x) RTEMS_XCONCAT(__REGISTER_PREFIX__, x)
/*
* define macros for all of the registers on this CPU
*
* EXAMPLE: #define d0 REG (d0)
*/
/*
* Define macros to handle section beginning and ends.
*/
#define BEGIN_CODE_DCL .text
#define END_CODE_DCL
#define BEGIN_DATA_DCL .data
#define END_DATA_DCL
#define BEGIN_CODE .text
#define END_CODE
#define BEGIN_DATA
#define END_DATA
#define BEGIN_BSS
#define END_BSS
#define END
/*
* Following must be tailor for a particular flavor of the C compiler.
* They may need to put underscores in front of the symbols.
*/
#define PUBLIC(sym) .globl SYM (sym)
#define EXTERN(sym) .globl SYM (sym)
/*
* Entry for traps which jump to a programmer-specified trap handler.
*/
#define TRAP(_vector, _handler) \
mov %psr, %l0 ; \
sethi %hi(_handler), %l4 ; \
jmp %l4+%lo(_handler); \
mov _vector, %l3
/*
* Used for the reset trap to avoid a supervisor instruction
*/
#define RTRAP(_vector, _handler) \
mov %g0, %l0 ; \
sethi %hi(_handler), %l4 ; \
jmp %l4+%lo(_handler); \
mov _vector, %l3
#endif
/** @} */
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