From: Sören Tempel <soe...@soeren-tempel.net>
Both glibc and musl libc declare pt_regs as an incomplete type. This
type has to be completed by inclusion of another header. On Linux, the
asm/ptrace.h header file provides this type definition. Without
including this header file, it is not possible to access the regs member
of the mcontext_t struct as done in libgo/runtime/go-signal.c. On glibc,
other headers (e.g. sys/user.h) include asm/ptrace.h but on musl
asm/ptrace.h is not included by other headers and thus the
aforementioned files do not compile without an explicit include of
asm/ptrace.h:
libgo/runtime/go-signal.c: In function 'getSiginfo':
libgo/runtime/go-signal.c:227:63: error: invalid use of undefined type
'struct pt_regs'
227 | ret.sigpc =
((ucontext_t*)(context))->uc_mcontext.regs->nip;
|
See also:
*
https://git.musl-libc.org/cgit/musl/commit/?id=c2518a8efb6507f1b41c3b12e03b06f8f2317a1f
* https://github.com/kaniini/libucontext/issues/36
Signed-off-by: Sören Tempel <soe...@soeren-tempel.net>
ChangeLog:
* libgo/runtime/go-signal.c: Include asm/ptrace.h for the
definition of pt_regs (used by mcontext_t) on PowerPC.
---
libgo/runtime/go-signal.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libgo/runtime/go-signal.c b/libgo/runtime/go-signal.c
index d30d1603adc..fc01e04e4a1 100644
--- a/libgo/runtime/go-signal.c
+++ b/libgo/runtime/go-signal.c
@@ -10,6 +10,12 @@
#include <sys/time.h>
#include <ucontext.h>
+// On PowerPC, ucontext.h uses a pt_regs struct as an incomplete
+// type. This type must be completed by including asm/ptrace.h.
+#ifdef __PPC__
+#include <asm/ptrace.h>
+#endif
+
#include "runtime.h"
#ifndef SA_RESTART
