WIP:riscv64-qemu target

tinygo build -target riscv64-qemu -monitor . many of these: tinygo:ld.lld: error: /home/rminnich/.cache/tinygo/thinlto/llvmcache-933570AB9628376F0C2EAD9666A92A793D143BE9:\ (function (reflect.Value).Complex: .text.(reflect.Value).Complex+0x76): relocation R_RISCV_HI20 out of range: \ 524291 is not in [-524288, 524287]; references reflect$string.170 >>> referenced by value.go:0 (/home/rminnich/tinygo/src/reflect/value.go:0) >>> defined in /home/rminnich/.cache/tinygo/thinlto/llvmcache-933570AB9628376F0C2EAD9666A92A793D143BE9 what's odd is that it the number is 524291 is 0x80003 I had to dump the llvm output to see the 0xffff_ffff bits. Signed-off-by: Ronald G. Minnich <[email protected]>
tinygo-org · Mar 14, 2023 · ac55424 · ac55424
1 parent 0d56dee
commit ac55424
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diff --git a/targets/riscv64-qemu.json b/targets/riscv64-qemu.json
@@ -0,0 +1,8 @@
+{
+	"inherits": ["riscv64"],
+	"features": "+a,+c,+m,-relax,-save-restore",
+	"build-tags": ["virt", "qemu"],
+	"default-stack-size": 4096,
+	"linkerscript": "targets/riscv64-qemu.ld",
+	"emulator": "qemu-system-riscv32 -machine virt -nographic -bios none -kernel {}"
+}
diff --git a/targets/riscv64-qemu.ld b/targets/riscv64-qemu.ld
@@ -0,0 +1,16 @@
+
+/* Memory map:
+ * https://github.com/qemu/qemu/blob/master/hw/riscv/virt.c
+ * RAM and flash are set to 1MB each. That should be enough for the foreseeable
+ * future. QEMU does not seem to limit the flash/RAM size and in fact doesn't
+ * seem to differentiate between it.
+ */
+MEMORY
+{
+    FLASH_TEXT (rw) : ORIGIN = 0x80000000, LENGTH = 0x100000
+    RAM (xrw)       : ORIGIN = 0x80100000, LENGTH = 0x100000
+}
+
+_stack_size = 2K;
+
+INCLUDE "targets/riscv.ld"