diff options
Diffstat (limited to 'fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/common/arch/invokeNative_arm.s')
-rw-r--r-- | fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/common/arch/invokeNative_arm.s | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/common/arch/invokeNative_arm.s b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/common/arch/invokeNative_arm.s new file mode 100644 index 000000000..bfe8e3b09 --- /dev/null +++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/core/iwasm/common/arch/invokeNative_arm.s @@ -0,0 +1,75 @@ +/* + * Copyright (C) 2019 Intel Corporation. All rights reserved. + * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + */ + .text + .align 2 +#ifndef BH_PLATFORM_DARWIN + .globl invokeNative + .type invokeNative, function +invokeNative: +#else + .globl _invokeNative +_invokeNative: +#endif /* end of BH_PLATFORM_DARWIN */ + +/* + * Arguments passed in: + * + * r0 function ptr + * r1 argv + * r2 argc + */ + + stmfd sp!, {r4, r5, r6, r7, lr} + sub sp, sp, #4 /* make sp 8 byte aligned */ + mov ip, r0 /* ip = function ptr */ + mov r4, r1 /* r4 = argv */ + mov r5, r2 /* r5 = argc */ + + cmp r5, #1 /* at least one argument required: exec_env */ + blt return + + mov r6, #0 /* increased stack size */ + + ldr r0, [r4], #4 /* r0 = argv[0] = exec_env */ + cmp r5, #1 + beq call_func + + ldr r1, [r4], #4 /* r1 = argv[1] */ + cmp r5, #2 + beq call_func + + ldr r2, [r4], #4 /* r2 = argv[2] */ + cmp r5, #3 + beq call_func + + ldr r3, [r4], #4 /* r3 = argv[3] */ + cmp r5, #4 + beq call_func + + sub r5, r5, #4 /* argc -= 4, now we have r0 ~ r3 */ + + /* Ensure address is 8 byte aligned */ + mov r6, r5, lsl#2 /* r6 = argc * 4 */ + add r6, r6, #7 /* r6 = (r6 + 7) & ~7 */ + bic r6, r6, #7 + sub sp, sp, r6 /* reserved stack space for left arguments */ + mov r7, sp + +loop_args: /* copy left arguments to stack */ + cmp r5, #0 + beq call_func + ldr lr, [r4], #4 + str lr, [r7], #4 + sub r5, r5, #1 + b loop_args + +call_func: + blx ip + add sp, sp, r6 /* restore sp */ + +return: + add sp, sp, #4 + ldmfd sp!, {r4, r5, r6, r7, lr} + bx lr |