Test communication

Makefile

@@ -7,11 +7,11 @@ MAKE ?= make
 all: build
 	@true
 
-build: build/agent.o
-	ar -crs build/libagent.a build/agent.o
+build: build/agent.o syscall/jasmin_syscall.o
+	ar -crs build/libagent.a build/agent.o syscall/jasmin_syscall.o
 
-build/%.o: build/%.S syscall/jasmin_syscall.o
-	$(CC) $< syscall/jasmin_syscall.o -c -o $@
+build/%.o: build/%.S
+	$(CC) $< -c -o $@
 
 clean:
 	rm build/* 2> /dev/null || true

src/agent.jazz

@@ -1,7 +1,16 @@
 from Jade require "crypto_scalarmult/curve25519/amd64/mulx/curve25519.jinc"
 
 export fn agent_start(reg u64 shared_mem sync_mem) {
-    while (true) {
+    stack u8[8] unused;
+    reg u64 spill_sync_mem;
+    spill_sync_mem = sync_mem;
 
+    while (true) {
+        unused = unused;
+        sync_mem = spill_sync_mem;
+        unused = #read(unused, sync_mem);
+        unused = unused;
+        sync_mem = spill_sync_mem;
+        unused = #write(unused, sync_mem);
     }
 }

syscall/jasmin_syscall.c

@@ -90,7 +90,7 @@ uint64_t __jasmin_syscall_open__(uint8_t* x, uint64_t xlen)
 
 uint8_t* __jasmin_syscall_read__(uint8_t* _x, uint64_t xlen, uint64_t fd)
 {
-  uint32_t* addr = (uint32_t*)(uintptr_t)(fd - 4096);
+  uint32_t* addr = (uint32_t*)(uintptr_t)fd;
   long ret = syscall(SYS_futex, addr, FUTEX_WAIT, 0x1, NULL, NULL, 0);
   if (ret == -1) {
     printf("%d\n", errno);
@@ -102,7 +102,7 @@ uint8_t* __jasmin_syscall_read__(uint8_t* _x, uint64_t xlen, uint64_t fd)
 
 uint8_t* __jasmin_syscall_write__(uint8_t* _x, uint64_t xlen, uint64_t fd)
 {
-  uint32_t* addr = (uint32_t*)(uintptr_t)(fd - 4096);
+  uint32_t* addr = (uint32_t*)(uintptr_t)fd;
   *addr = 1;
   syscall(SYS_futex, addr, FUTEX_WAKE, 1, NULL, NULL, 0);