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/* Assembly macros for 64-bit PowerPC.
Copyright (C) 2002 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef __ASSEMBLER__
#include <sysdeps/powerpc/sysdep.h>
#ifdef __ELF__
/* If compiled for profiling, call `_mcount' at the start of each function.
see ppc-mcount.S for more details. */
#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
#ifdef SYSV_ELF_PROFILING
#define CALL_MCOUNT \
.pushsection; \
.section ".data"; \
.align ALIGNARG(2); \
0: .long 0; \
.previous; \
mflr r0; \
std r0,16(r1); \
ld r0,0b@got(r2); \
bl JUMPTARGET(_mcount);
#else /* SYSV_ELF_PROFILING */
#define CALL_MCOUNT \
mflr r0; \
std r0,16(r1); \
bl JUMPTARGET(_mcount);
#endif /* SYSV_ELF_PROFILING */
#else /* PIC */
#ifdef SYSV_ELF_PROFILING
#define CALL_MCOUNT \
.pushsection; \
.section ".data"; \
.align ALIGNARG(2); \
0: .long 0; \
.previous; \
mflr r0; \
std r0,16(r1); \
ld r0,0b@got(r2); \
bl JUMPTARGET(_mcount);
#else /* SYSV_ELF_PROFILING */
#define CALL_MCOUNT \
mflr r0; \
std r0,16(r1); \
bl JUMPTARGET(_mcount);
#endif /* SYSV_ELF_PROFILING */
#endif /* PIC */
#else /* PROF */
#define CALL_MCOUNT /* Do nothing. */
#endif /* PROF */
#define DOT_LABEL(X) .##X
#define ENTRY(name) \
.section ".text"; \
.align ALIGNARG(2); \
.globl DOT_LABEL(name); \
.type DOT_LABEL(name),@function ; \
.globl name; \
.section ".opd","aw"; \
name##: ; \
.quad DOT_LABEL(name) ; \
.quad .TOC.@tocbase, 0; \
.previous; \
DOT_LABEL(name):
#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) \
.section ".text"; \
.globl DOT_LABEL(name); \
.type DOT_LABEL(name),@function ; \
.globl name; \
.section ".opd","aw"; \
name##: ; \
.quad DOT_LABEL(name) ; \
.quad .TOC.@tocbase, 0; \
.previous; \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
DOT_LABEL(name): \
CALL_MCOUNT \
b 0f; \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
0:
#else /* PROF */
#define EALIGN(name, alignt, words) \
.section ".text"; \
.globl DOT_LABEL(name); \
.type DOT_LABEL(name),@function ; \
.globl name; \
.section ".opd","aw"; \
name##: ; \
.quad DOT_LABEL(name) ; \
.quad .TOC.@tocbase, 0; \
.previous; \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
DOT_LABEL(name):
#endif
/* Local labels stripped out by the linker. */
#undef L
#define L(x) .L##x
#define tostring(s) #s
#define stringify(s) tostring(s)
#define XGLUE(a,b) a##b
#define GLUE(a,b) XGLUE(a,b)
#define LT_LABEL(name) GLUE(.LT,name)
#define LT_LABELSUFFIX(name,suffix) GLUE(GLUE(.LT,name),suffix)
/* Support Traceback tables */
#define TB_ASM 0x000c000000000000
#define TB_GLOBALLINK 0x0000800000000000
#define TB_IS_EPROL 0x0000400000000000
#define TB_HAS_TBOFF 0x0000200000000000
#define TB_INT_PROC 0x0000100000000000
#define TB_HAS_CTL 0x0000080000000000
#define TB_TOCLESS 0x0000040000000000
#define TB_FP_PRESENT 0x0000020000000000
#define TB_LOG_ABORT 0x0000010000000000
#define TB_INT_HANDL 0x0000008000000000
#define TB_NAME_PRESENT 0x0000004000000000
#define TB_USES_ALLOCA 0x0000002000000000
#define TB_SAVES_CR 0x0000000200000000
#define TB_SAVES_LR 0x0000000100000000
#define TB_STORES_BC 0x0000000080000000
#define TB_FIXUP 0x0000000040000000
#define TB_FP_SAVED(fprs) (((fprs) & 0x3f) << 24)
#define TB_GPR_SAVED(gprs) (((fprs) & 0x3f) << 16)
#define TB_FIXEDPARMS(parms) (((parms) & 0xff) << 8)
#define TB_FLOATPARMS(parms) (((parms) & 0x7f) << 1)
#define TB_PARMSONSTK 0x0000000000000001
#define PPC_HIGHER(v) (((v) >> 32) & 0xffff)
#define TB_DEFAULT TB_ASM | TB_HAS_TBOFF | TB_NAME_PRESENT
#define TRACEBACK(name) \
LT_LABEL(name): ; \
.long 0 ; \
.quad TB_DEFAULT ; \
.long LT_LABEL(name)-DOT_LABEL(name) ; \
.short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \
LT_LABELSUFFIX(name,_name_start): ;\
.ascii stringify(name) ; \
LT_LABELSUFFIX(name,_name_end): ; \
.align 2 ;
#define TRACEBACK_MASK(name,mask) \
LT_LABEL(name): ; \
.long 0 ; \
.quad TB_DEFAULT | mask ; \
.long LT_LABEL(name)-DOT_LABEL(name) ; \
.short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \
LT_LABELSUFFIX(name,_name_start): ;\
.ascii stringify(name) ; \
LT_LABELSUFFIX(name,_name_end): ; \
.align 2 ;
/* END generates Traceback tables */
#undef END
#define END(name) \
TRACEBACK(name) \
ASM_SIZE_DIRECTIVE(name)
/* This form supports more informative traceback tables */
#define END_GEN_TB(name,mask) \
TRACEBACK_MASK(name,mask) \
ASM_SIZE_DIRECTIVE(name)
#define DO_CALL(syscall) \
li 0,syscall; \
sc
/* ppc64 is always PIC */
#define JUMPTARGET(name) DOT_LABEL(name)
#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)
/* Label in text section. */
/* ppc64 function descriptors which requires . notation */
#define C_TEXT(name) .##name
#endif /* __ELF__ */
#endif /* __ASSEMBLER__ */
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