diff options
Diffstat (limited to 'src/runtime/sys_linux_arm64.s')
| -rw-r--r-- | src/runtime/sys_linux_arm64.s | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/runtime/sys_linux_arm64.s b/src/runtime/sys_linux_arm64.s index ddfb13d7a1..8a0f06f206 100644 --- a/src/runtime/sys_linux_arm64.s +++ b/src/runtime/sys_linux_arm64.s @@ -239,10 +239,14 @@ noswitch: // so don't bother saving g. // When using cgo, we already saved g on TLS, also don't save // g here. + // Also don't save g if we are already on the signal stack. + // We won't get a nested signal. MOVBU runtime·iscgo(SB), R22 CBNZ R22, nosaveg MOVD m_gsignal(R21), R22 // g.m.gsignal CBZ R22, nosaveg + CMP g, R22 + BEQ nosaveg MOVD (g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo MOVD g, (R22) @@ -303,10 +307,14 @@ noswitch: // so don't bother saving g. // When using cgo, we already saved g on TLS, also don't save // g here. + // Also don't save g if we are already on the signal stack. + // We won't get a nested signal. MOVBU runtime·iscgo(SB), R22 CBNZ R22, nosaveg MOVD m_gsignal(R21), R22 // g.m.gsignal CBZ R22, nosaveg + CMP g, R22 + BEQ nosaveg MOVD (g_stack+stack_lo)(R22), R22 // g.m.gsignal.stack.lo MOVD g, (R22) |