diff options
Diffstat (limited to 'src/runtime/sys_linux_arm64.s')
| -rw-r--r-- | src/runtime/sys_linux_arm64.s | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/runtime/sys_linux_arm64.s b/src/runtime/sys_linux_arm64.s index 51c87bea05..7a81d5479e 100644 --- a/src/runtime/sys_linux_arm64.s +++ b/src/runtime/sys_linux_arm64.s @@ -785,3 +785,48 @@ TEXT runtime·sbrk0(SB),NOSPLIT,$0-8 SVC MOVD R0, ret+0(FP) RET + +// func vgetrandom1(buf *byte, length uintptr, flags uint32, state uintptr, stateSize uintptr) int +TEXT runtime·vgetrandom1<ABIInternal>(SB),NOSPLIT,$16-48 + MOVD RSP, R20 + + MOVD runtime·vdsoGetrandomSym(SB), R8 + MOVD g_m(g), R21 + + MOVD m_vdsoPC(R21), R9 + MOVD R9, 8(RSP) + MOVD m_vdsoSP(R21), R9 + MOVD R9, 16(RSP) + MOVD LR, m_vdsoPC(R21) + MOVD $buf-8(FP), R9 + MOVD R9, m_vdsoSP(R21) + + MOVD RSP, R9 + BIC $15, R9 + MOVD R9, RSP + + MOVBU runtime·iscgo(SB), R9 + CBNZ R9, nosaveg + MOVD m_gsignal(R21), R9 + CBZ R9, nosaveg + CMP g, R9 + BEQ nosaveg + MOVD (g_stack+stack_lo)(R9), R22 + MOVD g, (R22) + + BL (R8) + + MOVD ZR, (R22) + B restore + +nosaveg: + BL (R8) + +restore: + MOVD R20, RSP + MOVD 16(RSP), R1 + MOVD R1, m_vdsoSP(R21) + MOVD 8(RSP), R1 + MOVD R1, m_vdsoPC(R21) + NOP R0 // Satisfy go vet, since the return value comes from the vDSO function. + RET |