zig

commit 060c475fcd358eb9d05d14ec9f1bb7bfc47e4423 (tree)
parent 5e770407cf50ae8cd103644c8ca297da52adb5b8
Author: David Rubin <daviru007@icloud.com>
Date:   Wed, 13 Mar 2024 19:26:10 -0700

riscv: update `start.zig` and restore ra from the proper stack offset

Diffstat:
M
lib/std/start.zig
 | 
2
+-
M
src/arch/riscv64/Emit.zig
 | 
2
+-

2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/std/start.zig b/lib/std/start.zig
@@ -155,7 +155,7 @@ fn exit2(code: usize) noreturn {
                 asm volatile ("ecall"
                     :
                     : [number] "{a7}" (94),
-                      [arg1] "{a0}" (0),
+                      [arg1] "{a0}" (code),
                     : "rcx", "r11", "memory"
                 );
             },
diff --git a/src/arch/riscv64/Emit.zig b/src/arch/riscv64/Emit.zig
@@ -287,7 +287,7 @@ fn mirPsuedo(emit: *Emit, inst: Mir.Inst.Index) !void {
             };
 
             // Restore ra
-            try emit.writeInstruction(Instruction.ld(.ra, stack_size - 16, .sp));
+            try emit.writeInstruction(Instruction.ld(.ra, stack_size - 8, .sp));
 
             // Restore s0
             try emit.writeInstruction(Instruction.ld(.s0, stack_size - 16, .sp));