/Modules/_ctypes/libffi/src/powerpc/asm.h
http://unladen-swallow.googlecode.com/ · C++ Header · 125 lines · 80 code · 11 blank · 34 comment · 0 complexity · 41549f68aeedd29e849159d4567ede07 MD5 · raw file
- /* -----------------------------------------------------------------------
- asm.h - Copyright (c) 1998 Geoffrey Keating
- PowerPC Assembly glue.
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- ``Software''), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
- The above copyright notice and this permission notice shall be included
- in all copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
- OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- OTHER DEALINGS IN THE SOFTWARE.
- ----------------------------------------------------------------------- */
- #define ASM_GLOBAL_DIRECTIVE .globl
- #define C_SYMBOL_NAME(name) name
- /* Macro for a label. */
- #ifdef __STDC__
- #define C_LABEL(name) name##:
- #else
- #define C_LABEL(name) name/**/:
- #endif
- /* 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
- #define END(name) \
- ASM_SIZE_DIRECTIVE(name)
- #ifdef PIC
- #define JUMPTARGET(name) name##@plt
- #else
- #define JUMPTARGET(name) name
- #endif
- /* Local labels stripped out by the linker. */
- #define L(x) .L##x