mirror of
https://github.com/jerryscript-project/jerryscript.git
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0511091e8a
Since the project is now hosted at the JS Foundation we can move to unified copyright notices for the project. Starting with this commit all future contributions to the project should only carry the following copyright notice (except for third-party code which requires copyright information to be preserved): "Copyright JS Foundation and other contributors, http://js.foundation" (without the quotes) This avoids cluttering the codebase with contributor-specific copyright notices which have a higher maintenance overhead and tend to get outdated quickly. Also dropping the year from the copyright notices helps to avoid yearly code changes just to update the copyright notices. Note that each contributor still retains full copyright ownership of his/her contributions and the respective authorship is tracked very accurately via Git. JerryScript-DCO-1.0-Signed-off-by: Tilmann Scheller t.scheller@samsung.com
180 lines
3.6 KiB
C
180 lines
3.6 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ASM_ARM_H
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#define ASM_ARM_H
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/*
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* mov syscall_no (%r0) -> %r7
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* svc #0
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*/
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#define SYSCALL_0 \
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push {r4-r12, lr}; \
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\
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mov r7, r0; \
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\
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svc #0; \
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\
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pop {r4-r12, pc};
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/*
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* mov syscall_no (%r0) -> %r7
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* mov arg1 (%r1) -> %r0
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* svc #0
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*/
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#define SYSCALL_1 \
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push {r4-r12, lr}; \
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\
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mov r7, r0; \
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mov r0, r1; \
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\
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svc #0; \
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\
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pop {r4-r12, pc};
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/*
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* mov syscall_no (%r0) -> %r7
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* mov arg1 (%r1) -> %r0
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* mov arg2 (%r2) -> %r1
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* svc #0
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*/
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#define SYSCALL_2 \
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push {r4-r12, lr}; \
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\
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mov r7, r0; \
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mov r0, r1; \
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mov r1, r2; \
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\
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svc #0; \
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\
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pop {r4-r12, pc};
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/*
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* mov syscall_no (%r0) -> %r7
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* mov arg1 (%r1) -> %r0
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* mov arg2 (%r2) -> %r1
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* mov arg3 (%r3) -> %r2
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* svc #0
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*/
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#define SYSCALL_3 \
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push {r4-r12, lr}; \
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\
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mov r7, r0; \
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mov r0, r1; \
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mov r1, r2; \
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mov r2, r3; \
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\
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svc #0; \
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\
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pop {r4-r12, pc};
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/*
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* ldr argc ([sp + 0x0]) -> r0
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* add argv (sp + 0x4) -> r1
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*
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* bl main
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*
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* bl exit
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*
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* infinite loop
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*/
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#define _START \
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ldr r0, [sp, #0]; \
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add r1, sp, #4; \
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bl main; \
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\
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bl exit; \
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1: \
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b 1b
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/**
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* If hard-float mode:
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* store s16-s31 vfp registers to buffer, pointed with r0 register,
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* and increase the register on size of stored data.
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*/
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#ifdef __TARGET_HOST_ARMv7_HARD_FLOAT
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# define _STORE_VFP_S16_S31_IF_HARD_FLOAT \
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vstm r0!, {s16 - s31};
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# define _LOAD_VFP_S16_S31_IF_HARD_FLOAT \
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vldm r0!, {s16 - s31};
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#else /* !__TARGET_HOST_ARMv7_HARD_FLOAT */
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# define _STORE_VFP_S16_S31_IF_HARD_FLOAT
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# define _LOAD_VFP_S16_S31_IF_HARD_FLOAT
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#endif /* __TARGET_HOST_ARMv7_HARD_FLOAT */
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/*
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* setjmp
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*
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* According to procedure call standard for the ARM architecture, the following
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* registers are callee-saved, and so need to be stored in context:
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* - r4 - r11
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* - sp
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* - s16 - s31
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*
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* Also, we should store:
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* - lr
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*
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* stmia {r4-r11, sp, lr} -> jmp_buf_0 (r0)!
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*
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* If hard-float build
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* vstm {s16-s31} -> jmp_buf_32 (r0)!
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*
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* mov r0, #0
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*
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* bx lr
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*/
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#define _SETJMP \
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stmia r0!, {r4 - r11, sp, lr}; \
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\
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_STORE_VFP_S16_S31_IF_HARD_FLOAT \
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\
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mov r0, #0; \
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\
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bx lr;
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/*
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* longjmp
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*
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* See also:
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* _SETJMP
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*
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* ldmia jmp_buf_0 (r0)! -> {r4-r11, sp, lr}
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*
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* If hard-float build
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* vldm jmp_buf_32 (r0)! -> {s16-s31}
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*
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* mov r1 -> r0
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* cmp r0, #0
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* bne 1f
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* mov #1 -> r0
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* 1:
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*
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* bx lr
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*/
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#define _LONGJMP \
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ldmia r0!, {r4 - r11, sp, lr}; \
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\
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_LOAD_VFP_S16_S31_IF_HARD_FLOAT \
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\
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mov r0, r1; \
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cmp r0, #0; \
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bne 1f; \
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mov r0, #1; \
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1: \
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\
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bx lr;
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#endif /* !ASM_ARM_H */
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