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lib: Make stdarg work for GCC on RISC-V64. 

* include/stdarg.h: GCC on RISC-V always passes arguments in registers.
Implementing these macros without the use of built-ins would be very
involved. So use those for now to make printf etc work.
This commit is contained in:
W. J. van der Laan 2021-04-04 11:24:36 +00:00 committed by Janneke Nieuwenhuizen
parent fa3e83691d
commit 9044e13309
1 changed files with 14 additions and 1 deletions
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15
include/stdarg.h
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@ -1,6 +1,7 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
*
* This file is part of GNU Mes.
*
@ -26,7 +27,19 @@
#define va_arg8(ap, type) va_arg(ap, type)
#else // ! SYSTEM_LIBC
#elif __GNUC__ && __riscv
// GCC on RISC-V always passes arguments in registers. Implementing these macros without
// the use of built-ins would be very involved.
typedef __builtin_va_list va_list;
#define va_start(v,l) __builtin_va_start(v,l)
#define va_end(v) __builtin_va_end(v)
#define va_arg(v,l) __builtin_va_arg(v,l)
#define va_arg8(ap, type) va_arg(ap, type)
#define va_copy(d,s) __builtin_va_copy(d,s)
#else // ! SYSTEM_LIBC && ! __riscv
#include <sys/types.h>