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| author | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:17 -0500 |
|---|---|---|
| committer | Gabe Black <gblack@eecs.umich.edu> | 2010-06-02 12:58:17 -0500 |
| commit | 5a6bf8301ad933d038f87f3030b00af1d775d5c9 (patch) | |
| tree | 4000aa1ae1f37490f508adfbf71c357ee76133a7 /src/arch | |
| parent | 563db6cb990a0dd5442b51b507152904e7bbd152 (diff) | |
| download | gem5-5a6bf8301ad933d038f87f3030b00af1d775d5c9.tar.xz | |
ARM: Detect a bad offset field for the VFP Ldm/Stm instructions in the decoder.
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/arm/isa/formats/fp.isa | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/src/arch/arm/isa/formats/fp.isa b/src/arch/arm/isa/formats/fp.isa index 55668e5f6..1bb15fd5b 100644 --- a/src/arch/arm/isa/formats/fp.isa +++ b/src/arch/arm/isa/formats/fp.isa @@ -96,20 +96,25 @@ let {{ } break; case 0x1: - switch (bits(opcode, 1, 0)) { - case 0x0: - return new VLdmStm(machInst, rn, vd, single, - true, false, false, offset); - case 0x1: - return new VLdmStm(machInst, rn, vd, single, - true, false, true, offset); - case 0x2: - return new VLdmStm(machInst, rn, vd, single, - true, true, false, offset); - case 0x3: - // If rn == sp, then this is called vpop. - return new VLdmStm(machInst, rn, vd, single, - true, true, true, offset); + { + if (offset == 0 || vd + offset > NumFloatArchRegs) { + break; + } + switch (bits(opcode, 1, 0)) { + case 0x0: + return new VLdmStm(machInst, rn, vd, single, + true, false, false, offset); + case 0x1: + return new VLdmStm(machInst, rn, vd, single, + true, false, true, offset); + case 0x2: + return new VLdmStm(machInst, rn, vd, single, + true, true, false, offset); + case 0x3: + // If rn == sp, then this is called vpop. + return new VLdmStm(machInst, rn, vd, single, + true, true, true, offset); + } } case 0x2: if (bits(opcode, 1, 0) == 0x2) { |