54b2aec10d
CSRRW and CSRRWI always write CSR. CSRRS, CSRRC, CSRRSI and CSRRCI write CSR when RS1 isn't zero. The CSR is read only if the [11:10] bits of CSR address is 0x3. The read-only CSR can not be written by the CSR instructions. gas/ * config/tc-riscv.c (riscv_ip): New boolean insn_with_csr to indicate we are assembling instruction with CSR. Call riscv_csr_read_only_check after parsing all arguments. (enum csr_insn_type): New enum is used to classify the CSR instruction. (riscv_csr_insn_type, riscv_csr_read_only_check): New functions. These are used to check if we write a read-only CSR by the CSR instruction. * testsuite/gas/riscv/priv-reg-fail-read-only-01.s: New testcase. Test all CSR for the read-only CSR checking. * testsuite/gas/riscv/priv-reg-fail-read-only-01.d: Likewise. * testsuite/gas/riscv/priv-reg-fail-read-only-01.l: Likewise. * testsuite/gas/riscv/priv-reg-fail-read-only-02.s: New testcase. Test all CSR instructions for the read-only CSR checking. * testsuite/gas/riscv/priv-reg-fail-read-only-02.d: Likewise. * testsuite/gas/riscv/priv-reg-fail-read-only-02.l: Likewise. |
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| config | ||
| gas | ||
| lib | ||
| ChangeLog-2004 | ||
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| ChangeLog-2011 | ||
| ChangeLog-2012 | ||
| ChangeLog-2013 | ||
| ChangeLog-2014 | ||
| ChangeLog-2015 | ||
| ChangeLog-9303 | ||