2014-03-01 00:12:03 +01:00
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/*!
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* \copy
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* Copyright (c) 2013, Cisco Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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2014-03-01 00:13:51 +01:00
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#ifdef __APPLE__
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2014-03-01 00:12:03 +01:00
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.macro WELS_ASM_FUNC_BEGIN
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.align 2
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.arm
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.globl _$0
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_$0:
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.endm
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2014-03-01 22:35:45 +01:00
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.macro WELS_ASM_FUNC_END
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mov pc, lr
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.endm
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2014-03-01 00:12:03 +01:00
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#else
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Explicitly enable the UAL syntax when using gnu tools
Arm assembly has got two variants of the syntax, the old legacy
syntax, and the new modern UAL (unified assembly language) syntax.
Most arm assembly is the same in the both syntaxes, but some
uncommon cases change the order of suffixes - the "subscs"
instruction would be written "subcss" in the old syntax.
The apple tools default to UAL, while the GNU tools (e.g. in
android) require you to specify ".syntax unified" to enable the
new syntax. When enabling the new syntax with the GNU tools, some
cases of "sub r0, r1, lsl #1" needs to be written explicitly as
"sub r0, r0, r1, lsl #1", handled in the previous commit.
This allows using the same, modern syntax for things like subscs,
without needing to have two alternate forms of writing it.
2014-03-05 10:47:53 +01:00
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.syntax unified
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2014-03-11 13:24:16 +01:00
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.section .note.GNU-stack,"",%progbits // Mark stack as non-executable
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.text
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Explicitly enable the UAL syntax when using gnu tools
Arm assembly has got two variants of the syntax, the old legacy
syntax, and the new modern UAL (unified assembly language) syntax.
Most arm assembly is the same in the both syntaxes, but some
uncommon cases change the order of suffixes - the "subscs"
instruction would be written "subcss" in the old syntax.
The apple tools default to UAL, while the GNU tools (e.g. in
android) require you to specify ".syntax unified" to enable the
new syntax. When enabling the new syntax with the GNU tools, some
cases of "sub r0, r1, lsl #1" needs to be written explicitly as
"sub r0, r0, r1, lsl #1", handled in the previous commit.
This allows using the same, modern syntax for things like subscs,
without needing to have two alternate forms of writing it.
2014-03-05 10:47:53 +01:00
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2014-03-01 00:12:03 +01:00
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.macro WELS_ASM_FUNC_BEGIN funcName
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.align 2
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.arm
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.global \funcName
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2014-03-01 16:15:48 +01:00
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.type \funcName, %function
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2014-03-01 22:35:45 +01:00
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.func \funcName
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2014-03-01 00:12:03 +01:00
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\funcName:
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.endm
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.macro WELS_ASM_FUNC_END
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mov pc, lr
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2014-03-01 22:35:45 +01:00
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.endfunc
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2014-03-01 00:12:03 +01:00
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.endm
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2014-03-01 22:35:45 +01:00
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#endif
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