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7498d7676d
There are a few .set mips* assembler directives used in the MIPS specific
sysdep code that force an instruction to be assembled for a specific ISA.
The reason for these is to allow an instruction to be encoded when it might
not be supported in the current ISA (when the code is run the Linux kernel
will trap and emulate any unsupported instructions). Unfortunately forcing
a specific ISA means that when assembling for a newer ISA, where the
instruction has a different encoding, the wrong encoding will be used.
* sysdeps/mips/bits/atomic.h [_MIPS_SIM == _ABIO32] (MIPS_PUSH_MIPS2):
Only use .set mips2 if the current ISA is below mips2.
* sysdeps/mips/sys/tas.h [_MIPS_SIM == _ABIO32] (_test_and_set):
Likewise.
* sysdeps/mips/nptl/tls.h (READ_THREAD_POINTER): Only use .set
mips32r2 if the current ISA is below mips32r2.
* sysdeps/mips/tls-macros.h (TLS_RDHWR): New define.
(TLS_IE): Updated to use the TLD_RDHWR macro.
(TLS_LE): Likewise.
* sysdeps/unix/mips/sysdep.h (__mips_isa_rev): Moved out of #ifdef
__ASSEMBLER__ condition.
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* Copyright (C) 1992-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Brendan Kehoe (brendan@zen.org).
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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, see
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<http://www.gnu.org/licenses/>. */
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#include <sgidefs.h>
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#include <sysdeps/unix/sysdep.h>
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#ifndef __mips_isa_rev
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# define __mips_isa_rev 0
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#endif
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#ifdef __ASSEMBLER__
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#include <regdef.h>
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#define ENTRY(name) \
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.globl name; \
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.align 2; \
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.ent name,0; \
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name##: \
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cfi_startproc;
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#undef END
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#define END(function) \
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cfi_endproc; \
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.end function; \
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.size function,.-function
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#define ret j ra ; nop
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#undef PSEUDO_END
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#define PSEUDO_END(sym) cfi_endproc; .end sym; .size sym,.-sym
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#define PSEUDO_NOERRNO(name, syscall_name, args) \
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.align 2; \
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ENTRY(name) \
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.set nomips16; \
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.set noreorder; \
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li v0, SYS_ify(syscall_name); \
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syscall
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#undef PSEUDO_END_NOERRNO
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#define PSEUDO_END_NOERRNO(sym) cfi_endproc; .end sym; .size sym,.-sym
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#define ret_NOERRNO ret
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#define PSEUDO_ERRVAL(name, syscall_name, args) \
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.align 2; \
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ENTRY(name) \
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.set nomips16; \
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.set noreorder; \
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li v0, SYS_ify(syscall_name); \
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syscall
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#undef PSEUDO_END_ERRVAL
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#define PSEUDO_END_ERRVAL(sym) cfi_endproc; .end sym; .size sym,.-sym
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#define ret_ERRVAL ret
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#define r0 v0
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#define r1 v1
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/* The mips move insn is d,s. */
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#define MOVE(x,y) move y , x
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#if _MIPS_SIM == _ABIO32
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# define L(label) $L ## label
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#else
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# define L(label) .L ## label
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#endif
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#endif
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