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For example, this code is invalid: smc #0x6951 The code would previously check for and encode for up to 16 bit immediate values, however this immediate should instead be only a 4 bit value (as documented herehttps://static.docs.arm.com/ddi0406/c/DDI0406C_C_arm_architecture_reference_manual.pdf ). Fixed this by adding range checks in the relevant areas and also removing code that would encode more than the first 4 bits of the immediate (code that is now redundant, as any immediate operand larger than 0xF would error now anyway). gas * config/tc-arm.c (do_smc): Add range check for immediate operand. (do_t_smc): Add range check for immediate operand. Remove obsolete immediate encoding. (md_apply_fix): Fix range check. Remove obsolete immediate encoding. * testsuite/gas/arm/arch6zk.d: Fix test. * testsuite/gas/arm/arch6zk.s: Fix test. * testsuite/gas/arm/smc-bad.d: New test. * testsuite/gas/arm/smc-bad.l: New test. * testsuite/gas/arm/smc-bad.s: New test. * testsuite/gas/arm/thumb32.d: Fix test. * testsuite/gas/arm/thumb32.s: Fix test. |
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