mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 03:20:05 +00:00
150 lines
4.7 KiB
C
150 lines
4.7 KiB
C
/* Copyright (C) 1992, 1997, 1998, 1999, 2000 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _LINUX_POWERPC_SYSDEP_H
|
|
#define _LINUX_POWERPC_SYSDEP_H 1
|
|
|
|
#include <sysdeps/unix/powerpc/sysdep.h>
|
|
|
|
/* For Linux we can use the system call table in the header file
|
|
/usr/include/asm/unistd.h
|
|
of the kernel. But these symbols do not follow the SYS_* syntax
|
|
so we have to redefine the `SYS_ify' macro here. */
|
|
#undef SYS_ify
|
|
#ifdef __STDC__
|
|
# define SYS_ify(syscall_name) __NR_##syscall_name
|
|
#else
|
|
# define SYS_ify(syscall_name) __NR_/**/syscall_name
|
|
#endif
|
|
|
|
#ifdef __ASSEMBLER__
|
|
|
|
/* This seems to always be the case on PPC. */
|
|
#define ALIGNARG(log2) log2
|
|
/* For ELF we need the `.type' directive to make shared libs work right. */
|
|
#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
|
|
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
|
|
|
|
/* 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. */
|
|
#ifdef PIC
|
|
#define CALL_MCOUNT \
|
|
.pushsection; \
|
|
.section ".data"; \
|
|
.align ALIGNARG(2); \
|
|
0:.long 0; \
|
|
.previous; \
|
|
mflr r0; \
|
|
stw r0,4(r1); \
|
|
bl _GLOBAL_OFFSET_TABLE_@local-4; \
|
|
mflr r11; \
|
|
lwz r0,0b@got(r11); \
|
|
bl JUMPTARGET(_mcount);
|
|
#else /* PIC */
|
|
#define CALL_MCOUNT \
|
|
.section ".data"; \
|
|
.align ALIGNARG(2); \
|
|
0:.long 0; \
|
|
.previous; \
|
|
mflr r0; \
|
|
lis r11,0b@ha; \
|
|
stw r0,4(r1); \
|
|
addi r0,r11,0b@l; \
|
|
bl JUMPTARGET(_mcount);
|
|
#endif /* PIC */
|
|
#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) \
|
|
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) \
|
|
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)
|
|
#endif
|
|
|
|
#undef END
|
|
#define END(name) \
|
|
ASM_SIZE_DIRECTIVE(name)
|
|
|
|
#define DO_CALL(syscall) \
|
|
li 0,syscall; \
|
|
sc
|
|
|
|
#ifdef PIC
|
|
#define JUMPTARGET(name) name##@plt
|
|
#else
|
|
#define JUMPTARGET(name) name
|
|
#endif
|
|
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
.section ".text"; \
|
|
ENTRY (name) \
|
|
DO_CALL (SYS_ify (syscall_name));
|
|
|
|
#define PSEUDO_RET \
|
|
bnslr; \
|
|
b JUMPTARGET(__syscall_error)
|
|
#define ret PSEUDO_RET
|
|
|
|
#undef PSEUDO_END
|
|
#define PSEUDO_END(name) \
|
|
END (name)
|
|
|
|
/* Local labels stripped out by the linker. */
|
|
#undef L
|
|
#define L(x) .L##x
|
|
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
#endif /* linux/powerpc/sysdep.h */
|