Author: cdavis Date: Fri Aug 31 11:11:48 2018 New Revision: 341232 URL: http://llvm.org/viewvc/llvm-project?rev=341232&view=rev Log: Export public functions implemented in assembly on Windows.
Summary: By default, symbols aren't visible outside of the module that defines them. To make them visible, they must be exported. The easiest way to do that is to embed an `-export:symname` directive into the object file. Reviewers: mstorsjo, rnk Subscribers: christof, cfe-commits Differential Revision: https://reviews.llvm.org/D51508 Modified: libunwind/trunk/src/assembly.h Modified: libunwind/trunk/src/assembly.h URL: http://llvm.org/viewvc/llvm-project/libunwind/trunk/src/assembly.h?rev=341232&r1=341231&r2=341232&view=diff ============================================================================== --- libunwind/trunk/src/assembly.h (original) +++ libunwind/trunk/src/assembly.h Fri Aug 31 11:11:48 2018 @@ -44,6 +44,7 @@ #if defined(__APPLE__) #define SYMBOL_IS_FUNC(name) +#define EXPORT_SYMBOL(name) #define HIDDEN_SYMBOL(name) .private_extern name #define NO_EXEC_STACK_DIRECTIVE @@ -54,6 +55,7 @@ #else #define SYMBOL_IS_FUNC(name) .type name,@function #endif +#define EXPORT_SYMBOL(name) #define HIDDEN_SYMBOL(name) .hidden name #if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ @@ -70,6 +72,11 @@ .scl 2 SEPARATOR \ .type 32 SEPARATOR \ .endef +#define EXPORT_SYMBOL2(name) \ + .section .drectve,"yn" SEPARATOR \ + .ascii "-export:", #name, "\0" SEPARATOR \ + .text +#define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name) #define HIDDEN_SYMBOL(name) #define NO_EXEC_STACK_DIRECTIVE @@ -82,6 +89,7 @@ #define DEFINE_LIBUNWIND_FUNCTION(name) \ .globl SYMBOL_NAME(name) SEPARATOR \ + EXPORT_SYMBOL(name) SEPARATOR \ SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ SYMBOL_NAME(name): _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
