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| author | Charles Davis <cdavis5x@gmail.com> | 2018-08-31 18:11:48 +0000 |
|---|---|---|
| committer | Charles Davis <cdavis5x@gmail.com> | 2018-08-31 18:11:48 +0000 |
| commit | 5598288131bddd69f39c75ae61fba23a4b8cf80e (patch) | |
| tree | 2620083ed107b97b8715d2b3613c6215b23dd75c | |
| parent | d743159ded798c009c24b513d586e2894d7494df (diff) | |
| download | libunwind_llvm-5598288131bddd69f39c75ae61fba23a4b8cf80e.tar.gz | |
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
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@341232 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | src/assembly.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/assembly.h b/src/assembly.h index 07b08f9..e98ad40 100644 --- a/src/assembly.h +++ b/src/assembly.h @@ -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): |