/** * @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. This file is: * * COPYRIGHT (c) 1994-1997. * On-Line Applications Research Corporation (OAR). */ #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 #include #include /** * @defgroup RTEMSScoreCPUi386ASM i386 Assembler Support * * @ingroup RTEMSScoreCPUi386 * * @brief i386 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. */ #ifndef __USER_LABEL_PREFIX__ #define __USER_LABEL_PREFIX__ #endif /* * Looks like there is a bug in gcc 2.6.2 where this is not * defined correctly when configured as i386-coff and * i386-aout. */ #undef __REGISTER_PREFIX__ #define __REGISTER_PREFIX__ % /* #ifndef __REGISTER_PREFIX__ #define __REGISTER_PREFIX__ #endif */ #include /* Use the right prefix for global labels. */ #define SYM(x) CONCAT0 (__USER_LABEL_PREFIX__, x) /* Use the right prefix for registers. */ #define REG(x) CONCAT0 (__REGISTER_PREFIX__, x) #define eax REG (eax) #define ebx REG (ebx) #define ecx REG (ecx) #define edx REG (edx) #define esi REG (esi) #define edi REG (edi) #define esp REG (esp) #define ebp REG (ebp) #define cr0 REG (cr0) #define cr4 REG (cr4) #define ax REG (ax) #define bx REG (bx) #define cx REG (cx) #define dx REG (dx) #define si REG (si) #define di REG (di) #define sp REG (sp) #define bp REG (bp) #define ah REG (ah) #define bh REG (bh) #define ch REG (ch) #define dh REG (dh) #define al REG (al) #define bl REG (bl) #define cl REG (cl) #define dl REG (dl) #define cs REG (cs) #define ds REG (ds) #define es REG (es) #define fs REG (fs) #define gs REG (gs) #define ss REG (ss) /* * 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 .data #define END_DATA #define BEGIN_BSS .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) #ifdef RTEMS_SMP .macro GET_CPU_ID REG .set LAPIC_ID, 0x20 .set LAPIC_ID_SHIFT, 0x18L movl imps_lapic_addr,\REG movl LAPIC_ID(\REG),\REG shrl $LAPIC_ID_SHIFT,\REG /* LAPIC_ID in REG */ movzbl imps_apic_cpu_map(\REG),\REG /* CPU ID in REG */ .endm .macro GET_SELF_CPU_CONTROL REG GET_CPU_ID \REG shll $PER_CPU_CONTROL_SIZE_LOG2,\REG /* Calculate offset for CPU structure */ leal _Per_CPU_Information(\REG),\REG /* Address of info for current CPU in REG */ .endm #else .macro GET_CPU_ID REG movl $0,\REG .endm .macro GET_SELF_CPU_CONTROL REG leal _Per_CPU_Information, \REG .endm #endif /**@}**/ #endif