sim: syscall: add common sim_syscall helpers

Many ports have the same sim syscall logic, so add some helpers to handle
all the common details.  The arches still have to deal with the unpacking
and packing of the syscall arguments, but the rest of the sim<->callback
glue is now shared.

3 files changed, 35 insertions, 43 deletions

diff --git a/sim/m32r/ChangeLog b/sim/m32r/ChangeLog
index b915747..43aa13d 100644
--- a/sim/m32r/ChangeLog
+++ b/sim/m32r/ChangeLog
@@ -1,5 +1,11 @@
 2015-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* traps.c (m32r_trap): Replace call to cb_syscall with
+	sim_syscall_multi.
+	* traps-linux.c (m32r_trap): Likewise.
+
+2015-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* traps-linux.c: Include sim-syscall.h.
 	(syscall_read_mem, syscall_write_mem): Delete.
 	(m32r_trap): Change syscall_read_mem/syscall_write_mem
diff --git a/sim/m32r/traps-linux.c b/sim/m32r/traps-linux.c
index 4b6384e..8fee2a0 100644
--- a/sim/m32r/traps-linux.c
+++ b/sim/m32r/traps-linux.c
@@ -213,28 +213,21 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
     {
     case TRAP_ELF_SYSCALL :
       {
-        CB_SYSCALL s;
- 
-        CB_SYSCALL_INIT (&s);
-        s.func = m32rbf_h_gr_get (current_cpu, 0);
-        s.arg1 = m32rbf_h_gr_get (current_cpu, 1);
-        s.arg2 = m32rbf_h_gr_get (current_cpu, 2);
-        s.arg3 = m32rbf_h_gr_get (current_cpu, 3);
- 
-        if (s.func == TARGET_SYS_exit)
-          {
-            sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, s.arg1);
-          }
- 
-        s.p1 = (PTR) sd;
-        s.p2 = (PTR) current_cpu;
-        s.read_mem = sim_syscall_read_mem;
-        s.write_mem = sim_syscall_write_mem;
-        cb_syscall (cb, &s);
-        m32rbf_h_gr_set (current_cpu, 2, s.errcode);
-        m32rbf_h_gr_set (current_cpu, 0, s.result);
-        m32rbf_h_gr_set (current_cpu, 1, s.result2);
-        break;
+	long result, result2;
+	int errcode;
+
+	sim_syscall_multi (current_cpu,
+			   m32rbf_h_gr_get (current_cpu, 0),
+			   m32rbf_h_gr_get (current_cpu, 1),
+			   m32rbf_h_gr_get (current_cpu, 2),
+			   m32rbf_h_gr_get (current_cpu, 3),
+			   m32rbf_h_gr_get (current_cpu, 4),
+			   &result, &result2, &errcode);
+
+	m32rbf_h_gr_set (current_cpu, 2, errcode);
+	m32rbf_h_gr_set (current_cpu, 0, result);
+	m32rbf_h_gr_set (current_cpu, 1, result2);
+	break;
       }
 
     case TRAP_LINUX_SYSCALL :
diff --git a/sim/m32r/traps.c b/sim/m32r/traps.c
index 869b596..225c37f 100644
--- a/sim/m32r/traps.c
+++ b/sim/m32r/traps.c
@@ -129,27 +129,20 @@ m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
     {
     case TRAP_SYSCALL :
       {
-	CB_SYSCALL s;
-
-	CB_SYSCALL_INIT (&s);
-	s.func = m32rbf_h_gr_get (current_cpu, 0);
-	s.arg1 = m32rbf_h_gr_get (current_cpu, 1);
-	s.arg2 = m32rbf_h_gr_get (current_cpu, 2);
-	s.arg3 = m32rbf_h_gr_get (current_cpu, 3);
-
-	if (s.func == TARGET_SYS_exit)
-	  {
-	    sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, s.arg1);
-	  }
-
-	s.p1 = (PTR) sd;
-	s.p2 = (PTR) current_cpu;
-	s.read_mem = sim_syscall_read_mem;
-	s.write_mem = sim_syscall_write_mem;
-	cb_syscall (cb, &s);
-	m32rbf_h_gr_set (current_cpu, 2, s.errcode);
-	m32rbf_h_gr_set (current_cpu, 0, s.result);
-	m32rbf_h_gr_set (current_cpu, 1, s.result2);
+	long result, result2;
+	int errcode;
+
+	sim_syscall_multi (current_cpu,
+			   m32rbf_h_gr_get (current_cpu, 0),
+			   m32rbf_h_gr_get (current_cpu, 1),
+			   m32rbf_h_gr_get (current_cpu, 2),
+			   m32rbf_h_gr_get (current_cpu, 3),
+			   m32rbf_h_gr_get (current_cpu, 4),
+			   &result, &result2, &errcode);
+
+	m32rbf_h_gr_set (current_cpu, 2, errcode);
+	m32rbf_h_gr_set (current_cpu, 0, result);
+	m32rbf_h_gr_set (current_cpu, 1, result2);
 	break;
       }