Adding a batch of missing system calls.
R=rsc
APPROVED=rsc
DELTA=1329 (1264 added, 1 deleted, 64 changed)
OCL=30040
CL=30158
diff --git a/src/pkg/runtime/linux/arm/signal.c b/src/pkg/runtime/linux/arm/signal.c
index 024018d..f14dcbf 100644
--- a/src/pkg/runtime/linux/arm/signal.c
+++ b/src/pkg/runtime/linux/arm/signal.c
@@ -2,3 +2,103 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+#include "runtime.h"
+#include "defs.h"
+#include "signals.h"
+#include "os.h"
+
+void dumpregs(void) {}
+// void
+// dumpregs(Sigcontext *r)
+// {
+// printf("eax %X\n", r->eax);
+// printf("ebx %X\n", r->ebx);
+// printf("ecx %X\n", r->ecx);
+// printf("edx %X\n", r->edx);
+// printf("edi %X\n", r->edi);
+// printf("esi %X\n", r->esi);
+// printf("ebp %X\n", r->ebp);
+// printf("esp %X\n", r->esp);
+// printf("eip %X\n", r->eip);
+// printf("eflags %X\n", r->eflags);
+// printf("cs %X\n", r->cs);
+// printf("fs %X\n", r->fs);
+// printf("gs %X\n", r->gs);
+// }
+
+
+/*
+ * This assembler routine takes the args from registers, puts them on the stack,
+ * and calls sighandler().
+ */
+extern void sigtramp(void);
+extern void sigignore(void); // just returns
+extern void sigreturn(void); // calls sigreturn
+
+void sighandler(void) {}
+// void
+// sighandler(int32 sig, Siginfo* info, void* context)
+// {
+// Ucontext *uc;
+// Sigcontext *sc;
+
+// if(panicking) // traceback already printed
+// exit(2);
+// panicking = 1;
+
+// uc = context;
+// sc = &uc->uc_mcontext;
+
+// if(sig < 0 || sig >= NSIG)
+// printf("Signal %d\n", sig);
+// else
+// printf("%s\n", sigtab[sig].name);
+
+// printf("Faulting address: %p\n", *(void**)info->_sifields);
+// printf("pc=%X\n", sc->eip);
+// printf("\n");
+
+// if(gotraceback()){
+// traceback((void*)sc->eip, (void*)sc->esp, m->curg);
+// tracebackothers(m->curg);
+// dumpregs(sc);
+// }
+
+// breakpoint();
+// exit(2);
+// }
+
+void
+signalstack(byte *p, int32 n)
+{
+// Sigaltstack st;
+
+// st.ss_sp = p;
+// st.ss_size = n;
+// st.ss_flags = 0;
+// sigaltstack(&st, nil);
+}
+
+void
+initsig(void)
+{
+// static Sigaction sa;
+
+// int32 i;
+// sa.sa_flags = SA_ONSTACK | SA_SIGINFO | SA_RESTORER;
+// sa.sa_mask = 0xFFFFFFFFFFFFFFFFULL;
+// sa.sa_restorer = (void*)sigreturn;
+// for(i = 0; i<NSIG; i++) {
+// if(sigtab[i].flags) {
+// if(sigtab[i].flags & SigCatch)
+// *(void**)sa._u = (void*)sigtramp; // handler
+// else
+// *(void**)sa._u = (void*)sigignore; // handler
+// if(sigtab[i].flags & SigRestart)
+// sa.sa_flags |= SA_RESTART;
+// else
+// sa.sa_flags &= ~SA_RESTART;
+// rt_sigaction(i, &sa, nil, 8);
+// }
+// }
+}
