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| 1 # Copyright 2012 The Native Client Authors. All rights reserved. |
| 2 # Use of this source code is governed by a BSD-style license that can |
| 3 # be found in the LICENSE file. |
| 4 |
| 5 # |
| 6 # Tests both legal and illegal variations on SP updates. |
| 7 # |
| 8 |
| 9 .globl _start |
| 10 _start: |
| 11 .align 4 |
| 12 .set noreorder |
| 13 .set STORE_MASK,$t7 |
| 14 |
| 15 # Test sp alteration without the appropriate mask. |
| 16 |
| 17 bundle_sp_dest_reg: |
| 18 addiu $sp, $sp, 64 # Error, no mask after sp alteration. |
| 19 and $sp, $a0, $a1 # Error, no mask after sp alteration. |
| 20 mfhi $sp # Error, no mask after sp alteration. |
| 21 clo $sp, $a2 # Error, no mask after sp alteration. |
| 22 ins $sp, $s3, 2, 10 # Error, no mask after sp alteration. |
| 23 lui $sp, 0x1f # Error, no mask after sp alteration. |
| 24 mfc1 $sp, $f12 # Error, no mask after sp alteration. |
| 25 mfhc1 $sp, $f10 # Error, no mask after sp alteration. |
| 26 mflo $sp # Error, no mask after sp alteration. |
| 27 movn $sp, $v0, $v1 # Error, no mask after sp alteration. |
| 28 movt $sp, $s4, $fcc4 # Error, no mask after sp alteration. |
| 29 mul $sp, $s0, $s1 # Error, no mask after sp alteration. |
| 30 |
| 31 # Modify sp with lw instruction. |
| 32 |
| 33 bundle_load_into_sp: |
| 34 lw $sp, 16($a0) # Error, no mask after sp alteration. |
| 35 nop |
| 36 lw $sp, 16($a0) |
| 37 and $sp, $sp, STORE_MASK # Error, a0 register is not masked. |
| 38 |
| 39 # Alteration of sp with mask doesn't need a mask. |
| 40 |
| 41 bundle_mask_doesnt_need_mask: |
| 42 nop |
| 43 and $sp, $sp, STORE_MASK # OK |
| 44 nop |
| 45 nop |
| 46 |
| 47 # A few instructions where sp is the first operand, but is not altered. |
| 48 |
| 49 bundle_sp_not_altered: |
| 50 mthi $sp # OK |
| 51 mult $sp, $t9 # OK |
| 52 nop |
| 53 nop |
| 54 |
| 55 # Alteration of sp with jalr instruction, not allowed. |
| 56 |
| 57 bundle_jalr_sp_t9: |
| 58 nop |
| 59 and $t9, $t9, $t6 |
| 60 jalr $sp, $t9 # Error, alteration of sp register. |
| 61 nop # Instruction in delay slot is indented. |
| 62 |
| 63 # Changing value of sp in delay slot, not allowed. |
| 64 |
| 65 bundle_chk_delay_slot: |
| 66 b bundle_chk_cross_1 |
| 67 addiu $sp, $sp, -32 # Error, delay slot splits sp alteration. |
| 68 and $sp, $sp, STORE_MASK |
| 69 nop |
| 70 |
| 71 # Pseudo-instruction with sp modification crosses bundle. |
| 72 # We allow this, because the potential jump at the start of bundle will |
| 73 # cause executing only mask instruction for sp, which is OK. |
| 74 |
| 75 bundle_chk_cross_1: |
| 76 nop |
| 77 nop |
| 78 nop |
| 79 addiu $sp, $sp, -32 # OK |
| 80 |
| 81 bundle_chk_cross_2: |
| 82 and $sp, $sp, STORE_MASK |
| 83 nop |
| 84 nop |
| 85 nop |
| 86 |
| 87 # Correct sp changes. |
| 88 |
| 89 bundle_OK: |
| 90 add $sp, $sp, 64 # OK |
| 91 and $sp, $sp, STORE_MASK |
| 92 sub $sp, $sp, 56 # OK |
| 93 and $sp, $sp, STORE_MASK |
| 94 |
| 95 end_of_code: |
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Chromium Code Reviews
Issue 9979025:
[MIPS] Adding validator for MIPS architecture. (Closed)
Base URL: http://src.chromium.org/native_client/trunk/src/native_client/