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Diffstat (limited to 'src/powerpc/asm.h')
| -rw-r--r-- | src/powerpc/asm.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/powerpc/asm.h b/src/powerpc/asm.h new file mode 100644 index 0000000..e86e6b0 --- /dev/null +++ b/src/powerpc/asm.h @@ -0,0 +1,125 @@ +/* ----------------------------------------------------------------------- + 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 |