diff options
Diffstat (limited to 'sysdeps/powerpc')
| -rw-r--r-- | sysdeps/powerpc/elf/sysdep.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sysdeps/powerpc/elf/sysdep.h b/sysdeps/powerpc/elf/sysdep.h new file mode 100644 index 0000000000..b51adda6fa --- /dev/null +++ b/sysdeps/powerpc/elf/sysdep.h @@ -0,0 +1,137 @@ +/* assembly code macros for ELF PowerPC hosts + Copyright (C) 1999,2001 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. */ + +#include <sysdeps/powerpc/sysdep.h> + +#ifdef __ASSEMBLER__ + +/* 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 + +#undef END +#define END(name) \ + ASM_SIZE_DIRECTIVE(name) + +#define DO_CALL(syscall) \ + li 0,syscall; \ + sc + +#ifdef PIC +#define JUMPTARGET(name) name##@plt +#else +#define JUMPTARGET(name) name +#endif + +#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) + +/* Local labels stripped out by the linker. */ +#undef L +#define L(x) .L##x + +/* Label in text section. */ +#define C_TEXT(name) name + +#endif /* __ASSEMBLER__ */ |