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| author | Wladimir J. van der Laan <laanwj@gmail.com> | 2018-07-12 17:44:13 +0200 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2018-07-12 17:46:29 +0200 |
| commit | dcb154e5aad80e49ff41a7851604ac46f38cb167 (patch) | |
| tree | cce8e915e383c46f35885429d9bc286a9eabcbdc /src/compat | |
| parent | 9b638c7ce1b93c996b49f02c0bcefb25b6200d8e (diff) | |
| parent | 253f5929097548fb10ef995002dedbb8dadb6a0d (diff) | |
Merge #13177: GCC-7 and glibc-2.27 back compat code
253f5929097548fb10ef995002dedbb8dadb6a0d Add stdin, stdout, stderr to ignored export list (Chun Kuan Lee)
fc6a9f2ab18ca8466d65d14c263c4f78f9ccebbf Use IN6ADDR_ANY_INIT instead of in6addr_any (Cory Fields)
908c1d7745f0ed117b0374fcc8486f83bf743bfc GCC-7 and glibc-2.27 compat code (Chun Kuan Lee)
Pull request description:
The `__divmoddi4` code was modified from https://github.com/gcc-mirror/gcc/blob/master/libgcc/libgcc2.c . I manually find the older glibc version of log2f by objdump, use `.symver` to specify the certain version.
Tree-SHA512: e8d875652003618c73e019ccc420e7a25d46f4eaff1c7a1a6bfc1770b3b46f074b368b2cb14df541b5ab124cca41dede4e28fe863a670589b834ef6b8713f9c4
Diffstat (limited to 'src/compat')
| -rw-r--r-- | src/compat/glibc_compat.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/compat/glibc_compat.cpp b/src/compat/glibc_compat.cpp index 55da5ef63f..b1cbe9f72a 100644 --- a/src/compat/glibc_compat.cpp +++ b/src/compat/glibc_compat.cpp @@ -7,6 +7,7 @@ #endif #include <cstddef> +#include <cstdint> #if defined(HAVE_SYS_SELECT_H) #include <sys/select.h> @@ -27,3 +28,47 @@ extern "C" FDELT_TYPE __fdelt_warn(FDELT_TYPE a) return a / __NFDBITS; } extern "C" FDELT_TYPE __fdelt_chk(FDELT_TYPE) __attribute__((weak, alias("__fdelt_warn"))); + +#if defined(__i386__) || defined(__arm__) + +extern "C" int64_t __udivmoddi4(uint64_t u, uint64_t v, uint64_t* rp); + +extern "C" int64_t __wrap___divmoddi4(int64_t u, int64_t v, int64_t* rp) +{ + int32_t c1 = 0, c2 = 0; + int64_t uu = u, vv = v; + int64_t w; + int64_t r; + + if (uu < 0) { + c1 = ~c1, c2 = ~c2, uu = -uu; + } + if (vv < 0) { + c1 = ~c1, vv = -vv; + } + + w = __udivmoddi4(uu, vv, (uint64_t*)&r); + if (c1) + w = -w; + if (c2) + r = -r; + + *rp = r; + return w; +} +#endif + +extern "C" float log2f_old(float x); +#ifdef __i386__ +__asm(".symver log2f_old,log2f@GLIBC_2.1"); +#elif defined(__amd64__) +__asm(".symver log2f_old,log2f@GLIBC_2.2.5"); +#elif defined(__arm__) +__asm(".symver log2f_old,log2f@GLIBC_2.4"); +#elif defined(__aarch64__) +__asm(".symver log2f_old,log2f@GLIBC_2.17"); +#endif +extern "C" float __wrap_log2f(float x) +{ + return log2f_old(x); +} |