/* Assembly macros for 32-bit PowerPC. Copyright (C) 1999, 2001, 2002, 2003, 2006 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/>. */ #ifdef __ASSEMBLER__ #ifdef __ELF__ /* If compiled for profiling, call `_mcount' at the start of each function. */ #ifdef PROF /* The mcount code relies on a the return address being on the stack to locate our caller and so it can restore it; so store one just for its benefit. */ # define CALL_MCOUNT \ mflr r0; \ stw r0,4(r1); \ cfi_offset (lr, 4); \ bl JUMPTARGET(_mcount); #else /* PROF */ # define CALL_MCOUNT /* Do nothing. */ #endif /* PROF */ #define ENTRY(name) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ .align ALIGNARG(2); \ C_LABEL(name) \ cfi_startproc; \ CALL_MCOUNT #define EALIGN_W_0 /* No words to insert. */ #define EALIGN_W_1 nop #define EALIGN_W_2 nop;nop #define EALIGN_W_3 nop;nop;nop #define EALIGN_W_4 EALIGN_W_3;nop #define EALIGN_W_5 EALIGN_W_4;nop #define EALIGN_W_6 EALIGN_W_5;nop #define EALIGN_W_7 EALIGN_W_6;nop /* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes past a 2^align boundary. */ #ifdef PROF # define EALIGN(name, alignt, words) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ .align ALIGNARG(2); \ C_LABEL(name) \ cfi_startproc; \ CALL_MCOUNT \ b 0f; \ .align ALIGNARG(alignt); \ EALIGN_W_##words; \ 0: #else /* PROF */ # define EALIGN(name, alignt, words) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ .align ALIGNARG(alignt); \ EALIGN_W_##words; \ C_LABEL(name) \ cfi_startproc; #endif #undef END #define END(name) \ cfi_endproc; \ ASM_SIZE_DIRECTIVE(name) #define DO_CALL(syscall) \ li 0,syscall; \ sc #undef JUMPTARGET #ifdef PIC # define JUMPTARGET(name) name##@plt #else # define JUMPTARGET(name) name #endif #if defined SHARED && defined DO_VERSIONING && defined PIC \ && !defined NO_HIDDEN # undef HIDDEN_JUMPTARGET # define HIDDEN_JUMPTARGET(name) __GI_##name##@local #endif #define PSEUDO(name, syscall_name, args) \ .section ".text"; \ ENTRY (name) \ DO_CALL (SYS_ify (syscall_name)); #define PSEUDO_RET \ bnslr+; \ b __syscall_error@local #define ret PSEUDO_RET #undef PSEUDO_END #define PSEUDO_END(name) \ END (name) #define PSEUDO_NOERRNO(name, syscall_name, args) \ .section ".text"; \ ENTRY (name) \ DO_CALL (SYS_ify (syscall_name)); #define PSEUDO_RET_NOERRNO \ blr #define ret_NOERRNO PSEUDO_RET_NOERRNO #undef PSEUDO_END_NOERRNO #define PSEUDO_END_NOERRNO(name) \ END (name) #define PSEUDO_ERRVAL(name, syscall_name, args) \ .section ".text"; \ ENTRY (name) \ DO_CALL (SYS_ify (syscall_name)); #define PSEUDO_RET_ERRVAL \ blr #undef ret_ERRVAL #define ret_ERRVAL PSEUDO_RET_ERRVAL #undef PSEUDO_END_ERRVAL #define PSEUDO_END_ERRVAL(name) \ END (name) /* Local labels stripped out by the linker. */ #undef L #define L(x) .L##x /* Label in text section. */ #define C_TEXT(name) name #endif /* __ELF__ */ #endif /* __ASSEMBLER__ */