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Support va_args in libc-builtin (#1117)

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Implement vprintf/sprintf/snprintf wrapper functions for libc-builtin.
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Xu Jun 2022-04-24 10:39:18 +08:00 committed by GitHub
parent 9b858c43cb
commit 5ab368dd00
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3 changed files with 33 additions and 0 deletions
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3
core/iwasm/libraries/libc-builtin/libc_builtin_wrapper.c
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@ -1067,6 +1067,9 @@ static NativeSymbol native_symbols_libc_builtin[] = {
REG_NATIVE_FUNC(printf, "($*)i"),
REG_NATIVE_FUNC(sprintf, "($$*)i"),
REG_NATIVE_FUNC(snprintf, "(*~$*)i"),
{ "vprintf", printf_wrapper, "($*)i", NULL },
{ "vsprintf", sprintf_wrapper, "($$*)i", NULL },
{ "vsnprintf", snprintf_wrapper, "(*~$*)i", NULL },
REG_NATIVE_FUNC(puts, "($)i"),
REG_NATIVE_FUNC(putchar, "(i)i"),
REG_NATIVE_FUNC(memcmp, "(**~)i"),

27
wamr-sdk/app/libc-builtin-sysroot/include/stdarg.h Normal file
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@ -0,0 +1,27 @@
/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#ifndef _WAMR_LIBC_STDARG_H
#define _WAMR_LIBC_STDARG_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _VA_LIST
typedef __builtin_va_list va_list;
#define _VA_LIST
#endif
#define va_start(ap, param) __builtin_va_start(ap, param)
#define va_end(ap) __builtin_va_end(ap)
#define va_arg(ap, type) __builtin_va_arg(ap, type)
#define __va_copy(d, s) __builtin_va_copy(d, s)
#ifdef __cplusplus
}
#endif
#endif /* end of _WAMR_LIBC_STDARG_H */

3
wamr-sdk/app/libc-builtin-sysroot/share/defined-symbols.txt
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@ -26,6 +26,9 @@ wasm_get_sys_tick_ms
printf
sprintf
snprintf
vprintf
vsprintf
vsnprintf
puts
putchar
memcmp