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authorMikael Pettersson <[email protected]>2015-11-14 11:45:01 +0100
committerMikael Pettersson <[email protected]>2015-11-14 11:49:07 +0100
commit3d42f1aac27268652c17972051f303f35b035e70 (patch)
treebfeaa24add14c522aa0d6ba41f6ef8da800c6450 /erts/emulator/hipe/hipe_x86_signal.c
parent0db6272323fd662cb43f5bb4d24f01daa8a6647d (diff)
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hipe_x86_signal: add support for musl libc
- change #if tests at default Solaris case to explicitly check for __sun__ - add new default case, instantiate it for musl
Diffstat (limited to 'erts/emulator/hipe/hipe_x86_signal.c')
-rw-r--r--erts/emulator/hipe/hipe_x86_signal.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/erts/emulator/hipe/hipe_x86_signal.c b/erts/emulator/hipe/hipe_x86_signal.c
index bb8a3f041f..69d4ea10c2 100644
--- a/erts/emulator/hipe/hipe_x86_signal.c
+++ b/erts/emulator/hipe/hipe_x86_signal.c
@@ -198,7 +198,7 @@ static void do_init(void)
#define INIT() do { if (!init_done()) do_init(); } while (0)
#endif /* __DARWIN__ */
-#if !defined(__GLIBC__) && !defined(__DARWIN__) && !defined(__NetBSD__)
+#if defined(__sun__)
/*
* Assume Solaris/x86 2.8.
* There is a number of sigaction() procedures in libc:
@@ -232,7 +232,34 @@ static void do_init(void)
}
#define _NSIG NSIG
#define INIT() do { if (!init_done()) do_init(); } while (0)
-#endif /* not glibc or darwin */
+#endif /* __sun__ */
+
+#if !(defined(__GLIBC__) || defined(__DARWIN__) || defined(__NetBSD__) || defined(__sun__))
+/*
+ * Unknown libc -- assume musl. Note: musl deliberately does not provide a musl-specific
+ * feature test macro, so we cannot check for it.
+ *
+ * sigaction is a weak alias for __sigaction, which is a wrapper for __libc_sigaction.
+ * There are libc-internal calls to __libc_sigaction which install handlers, so we must
+ * override __libc_sigaction rather than __sigaction.
+ */
+#include <dlfcn.h>
+static int (*__next_sigaction)(int, const struct sigaction*, struct sigaction*);
+#define init_done() (__next_sigaction != 0)
+#define __SIGACTION __libc_sigaction
+static void do_init(void)
+{
+ __next_sigaction = dlsym(RTLD_NEXT, "__libc_sigaction");
+ if (__next_sigaction != 0)
+ return;
+ perror("dlsym");
+ abort();
+}
+#ifndef _NSIG
+#define _NSIG NSIG
+#endif
+#define INIT() do { if (!init_done()) do_init(); } while (0)
+#endif /* !(__GLIBC__ || __DARWIN__ || __NetBSD__ || __sun__) */
#if !defined(__NetBSD__)
/*