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/* Assembly macros for 64-bit PowerPC.
Copyright (C) 2002, 2003, 2004, 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 __ELF__
#ifdef __ASSEMBLER__
/* Support macros for CALL_MCOUNT. */
.macro SAVE_ARG NARG
.if \NARG
SAVE_ARG \NARG-1
std 2+\NARG,-72+8*(\NARG)(1)
.endif
.endm
.macro REST_ARG NARG
.if \NARG
REST_ARG \NARG-1
ld 2+\NARG,40+8*(\NARG)(1)
.endif
.endm
/* If compiled for profiling, call `_mcount' at the start of each function.
see ppc-mcount.S for more details. */
.macro CALL_MCOUNT NARG
#ifdef PROF
mflr r0
SAVE_ARG \NARG
std r0,16(r1)
stdu r1,-112(r1)
bl JUMPTARGET (_mcount)
ld r0,128(r1)
REST_ARG \NARG
addi r1,r1,112
mtlr r0
#endif
.endm
#ifdef USE_PPC64_OVERLAPPING_OPD
# define OPD_ENT(name) .quad BODY_LABEL (name), .TOC.@tocbase
#else
# define OPD_ENT(name) .quad BODY_LABEL (name), .TOC.@tocbase, 0
#endif
#define ENTRY_1(name) \
.section ".text"; \
.type BODY_LABEL(name),@function; \
.globl name; \
.section ".opd","aw"; \
.align 3; \
name##: OPD_ENT (name); \
.previous;
# define DOT_LABEL(X) X
# define BODY_LABEL(X) .LY##X
# define ENTRY_2(name) \
.type name,@function; \
ENTRY_1(name)
# define END_2(name) \
.size name,.-BODY_LABEL(name); \
.size BODY_LABEL(name),.-BODY_LABEL(name);
#define ENTRY(name) \
ENTRY_2(name) \
.align ALIGNARG(2); \
BODY_LABEL(name): \
cfi_startproc;
#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^alignt boundary. */
#define EALIGN(name, alignt, words) \
ENTRY_2(name) \
.align ALIGNARG(alignt); \
EALIGN_W_##words; \
BODY_LABEL(name): \
cfi_startproc;
/* 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)-BODY_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)-BODY_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) \
cfi_endproc; \
TRACEBACK(name) \
END_2(name)
/* This form supports more informative traceback tables */
#define END_GEN_TB(name,mask) \
cfi_endproc; \
TRACEBACK_MASK(name,mask) \
END_2(name)
#define DO_CALL(syscall) \
li 0,syscall; \
sc
/* ppc64 is always PIC */
#undef JUMPTARGET
#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)
#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)
#else /* !__ASSEMBLER__ */
#ifdef USE_PPC64_OVERLAPPING_OPD
# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase;"
#else
# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase, 0;"
#endif
# define DOT_PREFIX ""
# define BODY_PREFIX ".LY"
# define ENTRY_2(name) ".type " #name ",@function;"
# define END_2(name) \
".size " #name ",.-" BODY_PREFIX #name ";\n" \
".size " BODY_PREFIX #name ",.-" BODY_PREFIX #name ";"
#endif /* __ASSEMBLER__ */
#endif /* __ELF__ */
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