From c0450320940c8c45f3847f2d0a22c0ebc545b291 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 2 Aug 2019 15:52:42 -0400 Subject: add time32 ABI compat shims, compat source tree these files provide the symbols for the traditional 32-bit time_t ABI on existing 32-bit archs by wrapping the real, internal versions of the corresponding functions, which always work with 64-bit time_t. they are written to be as agnostic as possible to the implementation details of the real functions, so that they can be written once and mostly forgotten, but they are aware of details of the old (and sometimes new) ABI, which is okay since ABI is fixed and cannot change. a new compat tree is added, separate from src, which the Makefile does not see or use now, but which archs will be able to add to the build process. we could also consider moving other things that are compat shims here, like functions which are purely for glibc-ABI-compat, with the goal of making it optional or just cleaning up the main src tree to make the distinction between actual implementation/API files and ABI-compat shims clear. --- compat/time32/time32.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 compat/time32/time32.c (limited to 'compat/time32/time32.c') diff --git a/compat/time32/time32.c b/compat/time32/time32.c new file mode 100644 index 00000000..4b8fac1c --- /dev/null +++ b/compat/time32/time32.c @@ -0,0 +1,15 @@ +#include "time32.h" +#include +#include +#include + +time32_t __time32(time32_t *p) +{ + time_t t = time(0); + if (t < INT32_MIN || t > INT32_MAX) { + errno = EOVERFLOW; + return -1; + } + if (p) *p = t; + return t; +} -- cgit 1.4.1