| // Copyright 2024 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| //go:build goexperiment.runtimesecret | |
| // Note: this assembly file is used for testing only. | |
| // We need to access registers directly to properly test | |
| // that secrets are erased and go test doesn't like to conditionally | |
| // include assembly files. | |
| // These functions defined in the package proper and we | |
| // rely on the linker to prune these away in regular builds | |
| #include "go_asm.h" | |
| #include "funcdata.h" | |
| TEXT ·loadRegisters(SB),0,$0-8 | |
| MOVD p+0(FP), R0 | |
| MOVD (R0), R10 | |
| MOVD (R0), R11 | |
| MOVD (R0), R12 | |
| MOVD (R0), R13 | |
| FMOVD (R0), F15 | |
| FMOVD (R0), F16 | |
| FMOVD (R0), F17 | |
| FMOVD (R0), F18 | |
| VLD1 (R0), [V20.B16] | |
| VLD1 (R0), [V21.H8] | |
| VLD1 (R0), [V22.S4] | |
| VLD1 (R0), [V23.D2] | |
| RET | |
| TEXT ·spillRegisters(SB),0,$0-16 | |
| MOVD p+0(FP), R0 | |
| MOVD R0, R1 | |
| MOVD R10, (R0) | |
| MOVD R11, 8(R0) | |
| MOVD R12, 16(R0) | |
| MOVD R13, 24(R0) | |
| ADD $32, R0 | |
| FMOVD F15, (R0) | |
| FMOVD F16, 16(R0) | |
| FMOVD F17, 32(R0) | |
| FMOVD F18, 64(R0) | |
| ADD $64, R0 | |
| VST1.P [V20.B16], (R0) | |
| VST1.P [V21.H8], (R0) | |
| VST1.P [V22.S4], (R0) | |
| VST1.P [V23.D2], (R0) | |
| SUB R1, R0, R0 | |
| MOVD R0, ret+8(FP) | |
| RET | |
| TEXT ·useSecret(SB),0,$0-24 | |
| NO_LOCAL_POINTERS | |
| // Load secret into R0 | |
| MOVD secret_base+0(FP), R0 | |
| MOVD (R0), R0 | |
| // Scatter secret across registers. | |
| // Increment low byte so we can tell which register | |
| // a leaking secret came from. | |
| // TODO(dmo): more substantial dirtying here | |
| ADD $1, R0 | |
| MOVD R0, R1 | |
| ADD $1, R0 | |
| MOVD R0, R2 | |
| ADD $1, R0 | |
| MOVD R0, R3 | |
| ADD $1, R0 | |
| MOVD R0, R4 | |
| ADD $1, R0 | |
| MOVD R0, R5 | |
| ADD $1, R0 | |
| MOVD R0, R6 | |
| ADD $1, R0 | |
| MOVD R0, R7 | |
| ADD $1, R0 | |
| MOVD R0, R8 | |
| ADD $1, R0 | |
| MOVD R0, R9 | |
| ADD $1, R0 | |
| MOVD R0, R10 | |
| ADD $1, R0 | |
| MOVD R0, R11 | |
| ADD $1, R0 | |
| MOVD R0, R12 | |
| ADD $1, R0 | |
| MOVD R0, R13 | |
| ADD $1, R0 | |
| MOVD R0, R14 | |
| ADD $1, R0 | |
| MOVD R0, R15 | |
| // Dirty the floating point registers | |
| ADD $1, R0 | |
| FMOVD R0, F0 | |
| ADD $1, R0 | |
| FMOVD R0, F1 | |
| ADD $1, R0 | |
| FMOVD R0, F2 | |
| ADD $1, R0 | |
| FMOVD R0, F3 | |
| ADD $1, R0 | |
| FMOVD R0, F4 | |
| ADD $1, R0 | |
| FMOVD R0, F5 | |
| ADD $1, R0 | |
| FMOVD R0, F6 | |
| ADD $1, R0 | |
| FMOVD R0, F7 | |
| ADD $1, R0 | |
| FMOVD R0, F8 | |
| ADD $1, R0 | |
| FMOVD R0, F9 | |
| ADD $1, R0 | |
| FMOVD R0, F10 | |
| ADD $1, R0 | |
| FMOVD R0, F11 | |
| ADD $1, R0 | |
| FMOVD R0, F12 | |
| ADD $1, R0 | |
| FMOVD R0, F13 | |
| ADD $1, R0 | |
| FMOVD R0, F14 | |
| ADD $1, R0 | |
| FMOVD R0, F15 | |
| ADD $1, R0 | |
| FMOVD R0, F16 | |
| ADD $1, R0 | |
| FMOVD R0, F17 | |
| ADD $1, R0 | |
| FMOVD R0, F18 | |
| ADD $1, R0 | |
| FMOVD R0, F19 | |
| ADD $1, R0 | |
| FMOVD R0, F20 | |
| ADD $1, R0 | |
| FMOVD R0, F21 | |
| ADD $1, R0 | |
| FMOVD R0, F22 | |
| ADD $1, R0 | |
| FMOVD R0, F23 | |
| ADD $1, R0 | |
| FMOVD R0, F24 | |
| ADD $1, R0 | |
| FMOVD R0, F25 | |
| ADD $1, R0 | |
| FMOVD R0, F26 | |
| ADD $1, R0 | |
| FMOVD R0, F27 | |
| ADD $1, R0 | |
| FMOVD R0, F28 | |
| ADD $1, R0 | |
| FMOVD R0, F29 | |
| ADD $1, R0 | |
| FMOVD R0, F30 | |
| ADD $1, R0 | |
| FMOVD R0, F31 | |
| RET | |