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Diffstat (limited to 'src/runtime/sys_linux_amd64.s')
| -rw-r--r-- | src/runtime/sys_linux_amd64.s | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/runtime/sys_linux_amd64.s b/src/runtime/sys_linux_amd64.s index e252a4b914..618553b196 100644 --- a/src/runtime/sys_linux_amd64.s +++ b/src/runtime/sys_linux_amd64.s @@ -228,6 +228,18 @@ TEXT runtime·nanotime1(SB),NOSPLIT,$16-8 // due to stack probes inserted to avoid stack/heap collisions. // See issue #20427. +#ifdef GOEXPERIMENT_runtimesecret + // The kernel might spill our secrets onto g0 + // erase our registers here. + // TODO(dmo): what is the ABI guarantee here? we use + // R14 later, but the function is ABI0 + CMPL g_secret(R14), $0 + JEQ nosecret + CALL ·secretEraseRegisters(SB) + +nosecret: +#endif + MOVQ SP, R12 // Save old SP; R12 unchanged by C code. MOVQ g_m(R14), BX // BX unchanged by C code. |