diff options
Diffstat (limited to 'src/runtime/asm_riscv64.s')
| -rw-r--r-- | src/runtime/asm_riscv64.s | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/runtime/asm_riscv64.s b/src/runtime/asm_riscv64.s index 2a4837b399..c88bef6ed8 100644 --- a/src/runtime/asm_riscv64.s +++ b/src/runtime/asm_riscv64.s @@ -158,8 +158,8 @@ TEXT runtime·getcallerpc(SB),NOSPLIT|NOFRAME,$0-8 */ // Called during function prolog when more stack is needed. -// Caller has already loaded: -// R1: framesize, R2: argsize, R3: LR +// Called with return address (i.e. caller's PC) in X5 (aka T0), +// and the LR register contains the caller's LR. // // The traceback routines see morestack on a g0 as being // the top of a stack (for example, morestack calling newstack @@ -209,6 +209,13 @@ TEXT runtime·morestack(SB),NOSPLIT|NOFRAME,$0-0 // func morestack_noctxt() TEXT runtime·morestack_noctxt(SB),NOSPLIT|NOFRAME,$0-0 + // Force SPWRITE. This function doesn't actually write SP, + // but it is called with a special calling convention where + // the caller doesn't save LR on stack but passes it as a + // register, and the unwinder currently doesn't understand. + // Make it SPWRITE to stop unwinding. (See issue 54332) + MOV X2, X2 + MOV ZERO, CTXT JMP runtime·morestack(SB) |