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https://sourceware.org/git/glibc.git
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234 lines
6.4 KiB
C
234 lines
6.4 KiB
C
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/* Assembly macros for 64-bit PowerPC.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifdef __ASSEMBLER__
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#include <sysdeps/powerpc/sysdep.h>
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#ifdef __ELF__
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/* If compiled for profiling, call `_mcount' at the start of each function.
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see ppc-mcount.S for more details. */
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#ifdef PROF
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/* The mcount code relies on a the return address being on the stack
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to locate our caller and so it can restore it; so store one just
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for its benefit. */
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#ifdef PIC
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#ifdef SYSV_ELF_PROFILING
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#define CALL_MCOUNT \
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.pushsection; \
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.section ".data"; \
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.align ALIGNARG(2); \
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0: .long 0; \
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.previous; \
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mflr r0; \
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std r0,16(r1); \
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ld r0,0b@got(r2); \
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bl JUMPTARGET(_mcount);
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#else /* SYSV_ELF_PROFILING */
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#define CALL_MCOUNT \
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mflr r0; \
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std r0,16(r1); \
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bl JUMPTARGET(_mcount);
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#endif /* SYSV_ELF_PROFILING */
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#else /* PIC */
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#ifdef SYSV_ELF_PROFILING
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#define CALL_MCOUNT \
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.pushsection; \
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.section ".data"; \
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.align ALIGNARG(2); \
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0: .long 0; \
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.previous; \
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mflr r0; \
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std r0,16(r1); \
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ld r0,0b@got(r2); \
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bl JUMPTARGET(_mcount);
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#else /* SYSV_ELF_PROFILING */
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#define CALL_MCOUNT \
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mflr r0; \
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std r0,16(r1); \
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bl JUMPTARGET(_mcount);
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#endif /* SYSV_ELF_PROFILING */
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#endif /* PIC */
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#else /* PROF */
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#define CALL_MCOUNT /* Do nothing. */
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#endif /* PROF */
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#define DOT_LABEL(X) .##X
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#define ENTRY(name) \
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.section ".text"; \
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.align ALIGNARG(2); \
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.globl DOT_LABEL(name); \
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.type DOT_LABEL(name),@function ; \
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.globl name; \
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.section ".opd","aw"; \
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name##: ; \
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.quad DOT_LABEL(name) ; \
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.quad .TOC.@tocbase, 0; \
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.previous; \
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DOT_LABEL(name):
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#define EALIGN_W_0 /* No words to insert. */
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#define EALIGN_W_1 nop
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#define EALIGN_W_2 nop;nop
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#define EALIGN_W_3 nop;nop;nop
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#define EALIGN_W_4 EALIGN_W_3;nop
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#define EALIGN_W_5 EALIGN_W_4;nop
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#define EALIGN_W_6 EALIGN_W_5;nop
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#define EALIGN_W_7 EALIGN_W_6;nop
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/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
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past a 2^align boundary. */
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#ifdef PROF
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#define EALIGN(name, alignt, words) \
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.section ".text"; \
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.globl DOT_LABEL(name); \
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.type DOT_LABEL(name),@function ; \
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.globl name; \
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.section ".opd","aw"; \
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name##: ; \
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.quad DOT_LABEL(name) ; \
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.quad .TOC.@tocbase, 0; \
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.previous; \
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.align ALIGNARG(alignt); \
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EALIGN_W_##words; \
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DOT_LABEL(name): \
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CALL_MCOUNT \
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b 0f; \
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.align ALIGNARG(alignt); \
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EALIGN_W_##words; \
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0:
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#else /* PROF */
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#define EALIGN(name, alignt, words) \
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.section ".text"; \
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.globl DOT_LABEL(name); \
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.type DOT_LABEL(name),@function ; \
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.globl name; \
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.section ".opd","aw"; \
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name##: ; \
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.quad DOT_LABEL(name) ; \
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.quad .TOC.@tocbase, 0; \
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.previous; \
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.align ALIGNARG(alignt); \
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EALIGN_W_##words; \
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DOT_LABEL(name):
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#endif
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/* Local labels stripped out by the linker. */
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#undef L
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#define L(x) .L##x
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#define tostring(s) #s
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#define stringify(s) tostring(s)
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#define XGLUE(a,b) a##b
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#define GLUE(a,b) XGLUE(a,b)
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#define LT_LABEL(name) GLUE(.LT,name)
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#define LT_LABELSUFFIX(name,suffix) GLUE(GLUE(.LT,name),suffix)
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/* Support Traceback tables */
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#define TB_ASM 0x000c000000000000
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#define TB_GLOBALLINK 0x0000800000000000
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#define TB_IS_EPROL 0x0000400000000000
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#define TB_HAS_TBOFF 0x0000200000000000
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#define TB_INT_PROC 0x0000100000000000
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#define TB_HAS_CTL 0x0000080000000000
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#define TB_TOCLESS 0x0000040000000000
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#define TB_FP_PRESENT 0x0000020000000000
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#define TB_LOG_ABORT 0x0000010000000000
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#define TB_INT_HANDL 0x0000008000000000
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#define TB_NAME_PRESENT 0x0000004000000000
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#define TB_USES_ALLOCA 0x0000002000000000
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#define TB_SAVES_CR 0x0000000200000000
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#define TB_SAVES_LR 0x0000000100000000
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#define TB_STORES_BC 0x0000000080000000
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#define TB_FIXUP 0x0000000040000000
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#define TB_FP_SAVED(fprs) (((fprs) & 0x3f) << 24)
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#define TB_GPR_SAVED(gprs) (((fprs) & 0x3f) << 16)
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#define TB_FIXEDPARMS(parms) (((parms) & 0xff) << 8)
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#define TB_FLOATPARMS(parms) (((parms) & 0x7f) << 1)
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#define TB_PARMSONSTK 0x0000000000000001
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#define PPC_HIGHER(v) (((v) >> 32) & 0xffff)
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#define TB_DEFAULT TB_ASM | TB_HAS_TBOFF | TB_NAME_PRESENT
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#define TRACEBACK(name) \
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LT_LABEL(name): ; \
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.long 0 ; \
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.quad TB_DEFAULT ; \
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.long LT_LABEL(name)-DOT_LABEL(name) ; \
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.short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \
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LT_LABELSUFFIX(name,_name_start): ;\
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.ascii stringify(name) ; \
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LT_LABELSUFFIX(name,_name_end): ; \
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.align 2 ;
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#define TRACEBACK_MASK(name,mask) \
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LT_LABEL(name): ; \
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.long 0 ; \
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.quad TB_DEFAULT | mask ; \
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.long LT_LABEL(name)-DOT_LABEL(name) ; \
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.short LT_LABELSUFFIX(name,_name_end)-LT_LABELSUFFIX(name,_name_start) ; \
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LT_LABELSUFFIX(name,_name_start): ;\
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.ascii stringify(name) ; \
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LT_LABELSUFFIX(name,_name_end): ; \
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.align 2 ;
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/* END generates Traceback tables */
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#undef END
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#define END(name) \
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TRACEBACK(name) \
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ASM_SIZE_DIRECTIVE(name)
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/* This form supports more informative traceback tables */
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#define END_GEN_TB(name,mask) \
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TRACEBACK_MASK(name,mask) \
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ASM_SIZE_DIRECTIVE(name)
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#define DO_CALL(syscall) \
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li 0,syscall; \
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sc
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/* ppc64 is always PIC */
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#define JUMPTARGET(name) DOT_LABEL(name)
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#define PSEUDO(name, syscall_name, args) \
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.section ".text"; \
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ENTRY (name) \
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DO_CALL (SYS_ify (syscall_name));
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#define PSEUDO_RET \
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bnslr; \
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b JUMPTARGET(__syscall_error)
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#define ret PSEUDO_RET
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#undef PSEUDO_END
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#define PSEUDO_END(name) \
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END (name)
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/* Label in text section. */
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/* ppc64 function descriptors which requires . notation */
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#define C_TEXT(name) .##name
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#endif /* __ELF__ */
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#endif /* __ASSEMBLER__ */
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