diff options
| -rw-r--r-- | include/alloca.h | 33 | ||||
| -rw-r--r-- | include/libc-internal.h | 30 |
2 files changed, 32 insertions, 31 deletions
diff --git a/include/alloca.h b/include/alloca.h index b4fc31738..2565b4835 100644 --- a/include/alloca.h +++ b/include/alloca.h @@ -36,7 +36,38 @@ extern void *alloca (size_t __size) __THROW; # define alloca(size) __builtin_alloca (size) #endif /* GCC. */ -#define __MAX_ALLOCA_CUTOFF 65536 +#ifdef _LIBC +# define __MAX_ALLOCA_CUTOFF 65536 + +# include <bits/stackinfo.h> +# ifdef _STACK_GROWS_DOWN +# define extend_alloca(buf, len, newlen) \ + (__typeof (buf)) ({ size_t __newlen = (newlen); \ + char *__newbuf = alloca (__newlen); \ + if (__newbuf + __newlen == (char *) buf) \ + len += __newlen; \ + else \ + len = __newlen; \ + __newbuf; }) +# elif defined _STACK_GROWS_UP +# define extend_alloca(buf, len, newlen) \ + (__typeof (buf)) ({ size_t __newlen = (newlen); \ + char *__newbuf = alloca (__newlen); \ + char *__buf = (buf); \ + if (__buf + __newlen == __newbuf) \ + { \ + len += __newlen; \ + __newbuf = __buf; \ + } \ + else \ + len = __newlen; \ + __newbuf; }) +# else +# error unknown stack +# define extend_alloca(buf, len, newlen) \ + alloca (((len) = (newlen))) +# endif +#endif __END_DECLS diff --git a/include/libc-internal.h b/include/libc-internal.h index 33956d8b1..8809bc042 100644 --- a/include/libc-internal.h +++ b/include/libc-internal.h @@ -67,36 +67,6 @@ extern const char *__uclibc_progname attribute_hidden; # endif /* IS_IN_libc */ -/* #include <alloca.h> */ -#include <bits/stackinfo.h> -#if defined(_STACK_GROWS_DOWN) -# define extend_alloca(buf, len, newlen) \ - (__typeof (buf)) ({ size_t __newlen = (newlen); \ - char *__newbuf = alloca (__newlen); \ - if (__newbuf + __newlen == (char *) buf) \ - len += __newlen; \ - else \ - len = __newlen; \ - __newbuf; }) -#elif defined(_STACK_GROWS_UP) -# define extend_alloca(buf, len, newlen) \ - (__typeof (buf)) ({ size_t __newlen = (newlen); \ - char *__newbuf = alloca (__newlen); \ - char *__buf = (buf); \ - if (__buf + __newlen == __newbuf) \ - { \ - len += __newlen; \ - __newbuf = __buf; \ - } \ - else \ - len = __newlen; \ - __newbuf; }) -#else -# warning unknown stack -# define extend_alloca(buf, len, newlen) \ - alloca (((len) = (newlen))) -#endif - #endif /* __ASSEMBLER__ */ #endif /* _LIBC_INTERNAL_H */ |