| /* Assembly macros for 32-bit PowerPC. |
| Copyright (C) 1999-2018 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/>. */ |
| |
| #include <sysdeps/powerpc/sysdep.h> |
| |
| #ifdef __ASSEMBLER__ |
| |
| /* 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. */ |
| # define CALL_MCOUNT \ |
| mflr r0; \ |
| stw r0,4(r1); \ |
| cfi_offset (lr, 4); \ |
| bl JUMPTARGET(_mcount); |
| #else /* PROF */ |
| # define CALL_MCOUNT /* Do nothing. */ |
| #endif /* PROF */ |
| |
| #define ENTRY(name) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),@function; \ |
| .align ALIGNARG(2); \ |
| C_LABEL(name) \ |
| cfi_startproc; \ |
| CALL_MCOUNT |
| |
| #define ENTRY_TOCLESS(name) ENTRY(name) |
| |
| /* helper macro for accessing the 32-bit powerpc GOT. */ |
| |
| #define SETUP_GOT_ACCESS(regname,GOT_LABEL) \ |
| bcl 20,31,GOT_LABEL ; \ |
| GOT_LABEL: ; \ |
| mflr (regname) |
| |
| #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) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),@function; \ |
| .align ALIGNARG(2); \ |
| C_LABEL(name) \ |
| cfi_startproc; \ |
| CALL_MCOUNT \ |
| b 0f; \ |
| .align ALIGNARG(alignt); \ |
| EALIGN_W_##words; \ |
| 0: |
| #else /* PROF */ |
| # define EALIGN(name, alignt, words) \ |
| .globl C_SYMBOL_NAME(name); \ |
| .type C_SYMBOL_NAME(name),@function; \ |
| .align ALIGNARG(alignt); \ |
| EALIGN_W_##words; \ |
| C_LABEL(name) \ |
| cfi_startproc; |
| #endif |
| |
| #undef END |
| #define END(name) \ |
| cfi_endproc; \ |
| ASM_SIZE_DIRECTIVE(name) |
| |
| #if !IS_IN(rtld) && !defined(__SPE__) |
| # define ABORT_TRANSACTION_IMPL \ |
| cmpwi 2,0; \ |
| beq 1f; \ |
| lwz 0,TM_CAPABLE(2); \ |
| cmpwi 0,0; \ |
| beq 1f; \ |
| li 11,_ABORT_SYSCALL; \ |
| tabort. 11; \ |
| .align 4; \ |
| 1: |
| #else |
| # define ABORT_TRANSACTION_IMPL |
| #endif |
| #define ABORT_TRANSACTION ABORT_TRANSACTION_IMPL |
| |
| #define DO_CALL(syscall) \ |
| ABORT_TRANSACTION \ |
| li 0,syscall; \ |
| sc |
| |
| #undef JUMPTARGET |
| #ifdef PIC |
| # define JUMPTARGET(name) name##@plt |
| #else |
| # define JUMPTARGET(name) name |
| #endif |
| |
| #if defined SHARED && defined PIC && !defined NO_HIDDEN |
| # undef HIDDEN_JUMPTARGET |
| # define HIDDEN_JUMPTARGET(name) __GI_##name##@local |
| #endif |
| |
| #define PSEUDO(name, syscall_name, args) \ |
| .section ".text"; \ |
| ENTRY (name) \ |
| DO_CALL (SYS_ify (syscall_name)); |
| |
| #define PSEUDO_RET \ |
| bnslr+; \ |
| b __syscall_error@local |
| #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 |
| #define ret_ERRVAL PSEUDO_RET_ERRVAL |
| |
| #undef PSEUDO_END_ERRVAL |
| #define PSEUDO_END_ERRVAL(name) \ |
| END (name) |
| |
| /* Local labels stripped out by the linker. */ |
| #undef L |
| #define L(x) .L##x |
| |
| #define XGLUE(a,b) a##b |
| #define GLUE(a,b) XGLUE (a,b) |
| #define GENERATE_GOT_LABEL(name) GLUE (.got_label, name) |
| |
| /* Label in text section. */ |
| #define C_TEXT(name) name |
| |
| #endif /* __ASSEMBLER__ */ |