--- /dev/null
+/*
+ * Generate the syscall functions for Z88DK
+ *
+ * SCC has some "interesting" properties. It's SmallC derived so pushes
+ * the arguments backwards which we must cope with while the kernel API
+ * carefully matches the gcc API of argument 1 in x and the other
+ * arguments on the stack offset as needed for the caller of the syscall
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "syscall_name.h"
+
+static char namebuf[128];
+
+static void write_call(int n)
+{
+ FILE *fp;
+ snprintf(namebuf, 128, "fuzix-scc6809/%s.s", syscall_name[n]);
+ fp = fopen(namebuf, "w");
+ if (fp == NULL) {
+ perror(namebuf);
+ exit(1);
+ }
+
+ fprintf(fp, "\t.text\n");
+ fprintf(fp, "\t.extern __syscall\n");
+ fprintf(fp, "\t.globl %s\n\n", syscall_name[n]);
+ fprintf(fp, "%s:\n", syscall_name[n]);
+
+ if (syscall_args[n] == VARARGS) {
+ /* Icky but there are only 3 and all are 2 v 3 arg */
+ fprintf(fp, "\tcmpu #2\n");
+ fprintf(fp, "\tbne l1\n");
+ fprintf(fp, "\tpuls d,x,u\n");
+ fprintf(fp, "\texg x,u\n");
+ fprintf(fp, "\tpshs d,x,u\n");
+ fprintf(fp, "\tldx 6,s\n");
+ fprintf(fp, "\tldd #%d\n", n);
+ fprintf(fp, "\tjmp __syscall\n");
+ fprintf(fp, "l1:\n");
+ fprintf(fp, "\tpuls d,x,y,u\n");
+ fprintf(fp, "\texg x,u\n");
+ fprintf(fp, "\tpshs d,x,y,u\n");
+ fprintf(fp, "\tldx 8,s\n");
+ fprintf(fp, "\tldd #%d\n", n);
+ fprintf(fp, "\tjmp __syscall\n");
+ fclose(fp);
+ return;
+ }
+
+ switch(syscall_args[n]) {
+ case 0:
+ break;
+ case 1:
+ fprintf(fp, "\tldx 2,s\n");
+ break;
+ case 2:
+ fprintf(fp, "\tldx 4,s\n");
+ break;
+ case 3:
+ fprintf(fp, "\tpuls d,x,u\n");
+ fprintf(fp, "\texg x,u\n");
+ fprintf(fp, "\tpshs d,x,u\n");
+ fprintf(fp, "\tldx 6,s\n");
+ break;
+ case 4:
+ fprintf(fp, "\tpuls d,x,y,u\n");
+ fprintf(fp, "\texg x,u\n");
+ fprintf(fp, "\tpshs d,x,y,u\n");
+ fprintf(fp, "\tldx 8,s\n");
+ }
+ fprintf(fp, "\tldd #%d\n", n);
+ fprintf(fp, "\tjmp __syscall\n");
+ fclose(fp);
+}
+
+static void write_call_table(void)
+{
+ int i;
+ for (i = 0; i < NR_SYSCALL; i++)
+ write_call(i);
+}
+
+static void write_makefile(void)
+{
+ int i;
+ FILE *fp = fopen("fuzix-scc6809/Makefile", "w");
+ if (fp == NULL) {
+ perror("Makefile");
+ exit(1);
+ }
+ fprintf(fp, "# Autogenerated by tools/syscall-scc6809\n");
+ fprintf(fp, "CROSS_AS=lxas09\nCROSS_LD=lxld09\nCROSS_AR=lxar\n");
+ fprintf(fp, "ASYS=syscall$(PLATFORM).s\n");
+ fprintf(fp, "ASRCS = syscall_%s.s\n", syscall_name[0]);
+ for (i = 1; i < NR_SYSCALL; i++)
+ fprintf(fp, "ASRCS += syscall_%s.s\n", syscall_name[i]);
+ fprintf(fp, "\n\nASRCALL = $(ASRCS) $(ASYS)\n");
+ fprintf(fp, "\nAOBJS = $(ASRCALL:.s=.o)\n\n");
+ fprintf(fp, "syslib.lib: $(AOBJS)\n");
+ fprintf(fp, "\techo $(AOBJS) >syslib.l\n");
+ fprintf(fp, "\t$(CROSS_AR) rc syslib.lib $(AOBJS)\n\n");
+ fprintf(fp, "$(AOBJS): %%.o: %%.s\n");
+ fprintf(fp, "\t$(CROSS_AS) $(ASOPTS) -o $*.o $<\n\n");
+ fprintf(fp, "clean:\n");
+ fprintf(fp, "\trm -f $(AOBJS) $(ASRCS) syslib.lib syslib.l *~\n\n");
+ fclose(fp);
+}
+
+int main(int argc, char *argv[])
+{
+ write_makefile();
+ write_call_table();
+ exit(0);
+}