diff options
Diffstat (limited to 'third_party/dav1d/tests/checkasm/arm/checkasm_64.S')
| -rw-r--r-- | third_party/dav1d/tests/checkasm/arm/checkasm_64.S | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/third_party/dav1d/tests/checkasm/arm/checkasm_64.S b/third_party/dav1d/tests/checkasm/arm/checkasm_64.S new file mode 100644 index 0000000000..25749145a5 --- /dev/null +++ b/third_party/dav1d/tests/checkasm/arm/checkasm_64.S @@ -0,0 +1,211 @@ +/****************************************************************************** + * Copyright © 2018, VideoLAN and dav1d authors + * Copyright © 2015 Martin Storsjo + * Copyright © 2015 Janne Grunau + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *****************************************************************************/ + +#define PRIVATE_PREFIX checkasm_ + +#include "src/arm/asm.S" +#include "src/arm/64/util.S" + +const register_init, align=4 + .quad 0x21f86d66c8ca00ce + .quad 0x75b6ba21077c48ad + .quad 0xed56bb2dcb3c7736 + .quad 0x8bda43d3fd1a7e06 + .quad 0xb64a9c9e5d318408 + .quad 0xdf9a54b303f1d3a3 + .quad 0x4a75479abd64e097 + .quad 0x249214109d5d1c88 + .quad 0x1a1b2550a612b48c + .quad 0x79445c159ce79064 + .quad 0x2eed899d5a28ddcd + .quad 0x86b2536fcd8cf636 + .quad 0xb0856806085e7943 + .quad 0x3f2bf84fc0fcca4e + .quad 0xacbd382dcf5b8de2 + .quad 0xd229e1f5b281303f + .quad 0x71aeaff20b095fd9 + .quad 0xab63e2e11fa38ed9 +endconst + + +const error_message_register + .asciz "failed to preserve register" +error_message_stack: + .asciz "stack clobbered" +endconst + + +// max number of args used by any asm function. +#define MAX_ARGS 15 + +#define CLOBBER_STACK ((8*MAX_ARGS + 15) & ~15) + +function stack_clobber, export=1 + mov x3, sp + mov x2, #CLOBBER_STACK +1: + stp x0, x1, [sp, #-16]! + subs x2, x2, #16 + b.gt 1b + mov sp, x3 + ret +endfunc + +// + 16 for stack canary reference +#define ARG_STACK ((8*(MAX_ARGS - 8) + 15) & ~15 + 16) + +function checked_call, export=1 + stp x29, x30, [sp, #-16]! + mov x29, sp + stp x19, x20, [sp, #-16]! + stp x21, x22, [sp, #-16]! + stp x23, x24, [sp, #-16]! + stp x25, x26, [sp, #-16]! + stp x27, x28, [sp, #-16]! + stp d8, d9, [sp, #-16]! + stp d10, d11, [sp, #-16]! + stp d12, d13, [sp, #-16]! + stp d14, d15, [sp, #-16]! + + movrel x9, register_init + ldp d8, d9, [x9], #16 + ldp d10, d11, [x9], #16 + ldp d12, d13, [x9], #16 + ldp d14, d15, [x9], #16 + ldp x19, x20, [x9], #16 + ldp x21, x22, [x9], #16 + ldp x23, x24, [x9], #16 + ldp x25, x26, [x9], #16 + ldp x27, x28, [x9], #16 + + sub sp, sp, #ARG_STACK +.equ pos, 0 +.rept MAX_ARGS-8 + // Skip the first 8 args, that are loaded into registers + ldr x9, [x29, #16 + 8*8 + pos] + str x9, [sp, #pos] +.equ pos, pos + 8 +.endr + + // Fill x8-x17 with garbage. This doesn't have to be preserved, + // but avoids relying on them having any particular value. + movrel x9, register_init + ldp x10, x11, [x9], #32 + ldp x12, x13, [x9], #32 + ldp x14, x15, [x9], #32 + ldp x16, x17, [x9], #32 + ldp x8, x9, [x9] + + // For stack overflows, the callee is free to overwrite the parameters + // that were passed on the stack (if any), so we can only check after + // that point. First figure out how many parameters the function + // really took on the stack: + ldr w2, [x29, #16 + 8*8 + (MAX_ARGS-8)*8] + // Load the first non-parameter value from the stack, that should be + // left untouched by the function. Store a copy of it inverted, so that + // e.g. overwriting everything with zero would be noticed. + ldr x2, [sp, x2, lsl #3] + mvn x2, x2 + str x2, [sp, #ARG_STACK-8] + + // Load the in-register arguments + mov x12, x0 + ldp x0, x1, [x29, #16] + ldp x2, x3, [x29, #32] + ldp x4, x5, [x29, #48] + ldp x6, x7, [x29, #64] + // Call the target function + blr x12 + + // Load the number of stack parameters, stack canary and its reference + ldr w2, [x29, #16 + 8*8 + (MAX_ARGS-8)*8] + ldr x2, [sp, x2, lsl #3] + ldr x3, [sp, #ARG_STACK-8] + + add sp, sp, #ARG_STACK + stp x0, x1, [sp, #-16]! + + mvn x3, x3 + cmp x2, x3 + b.ne 2f + + movrel x9, register_init + movi v3.8h, #0 + +.macro check_reg_neon reg1, reg2 + ldr q1, [x9], #16 + uzp1 v2.2d, v\reg1\().2d, v\reg2\().2d + eor v1.16b, v1.16b, v2.16b + orr v3.16b, v3.16b, v1.16b +.endm + check_reg_neon 8, 9 + check_reg_neon 10, 11 + check_reg_neon 12, 13 + check_reg_neon 14, 15 + uqxtn v3.8b, v3.8h + umov x3, v3.d[0] + +.macro check_reg reg1, reg2 + ldp x0, x1, [x9], #16 + eor x0, x0, \reg1 + eor x1, x1, \reg2 + orr x3, x3, x0 + orr x3, x3, x1 +.endm + check_reg x19, x20 + check_reg x21, x22 + check_reg x23, x24 + check_reg x25, x26 + check_reg x27, x28 + + cbz x3, 0f + + movrel x0, error_message_register + b 1f +2: + movrel x0, error_message_stack +1: +#ifdef PREFIX + bl _checkasm_fail_func +#else + bl checkasm_fail_func +#endif +0: + ldp x0, x1, [sp], #16 + ldp d14, d15, [sp], #16 + ldp d12, d13, [sp], #16 + ldp d10, d11, [sp], #16 + ldp d8, d9, [sp], #16 + ldp x27, x28, [sp], #16 + ldp x25, x26, [sp], #16 + ldp x23, x24, [sp], #16 + ldp x21, x22, [sp], #16 + ldp x19, x20, [sp], #16 + ldp x29, x30, [sp], #16 + ret +endfunc |