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| author | Jim Wilson <jimw@sifive.com> | 2018-03-16 10:03:57 -0700 |
|---|---|---|
| committer | Jim Wilson <jimw@sifive.com> | 2018-03-16 10:03:57 -0700 |
| commit | ca2fd32c5508ff1b68781ba5b82e6cdbf9ca100a (patch) | |
| tree | 09035890c27d97b43afa9a826ec608ac7d8ed30e /gas/config | |
| parent | 03afa6ef8ac9e5acfa68b1005aec6756eaa1d093 (diff) | |
| download | gdb-ca2fd32c5508ff1b68781ba5b82e6cdbf9ca100a.zip gdb-ca2fd32c5508ff1b68781ba5b82e6cdbf9ca100a.tar.gz gdb-ca2fd32c5508ff1b68781ba5b82e6cdbf9ca100a.tar.bz2 | |
RISC-V: Emit better warning for unknown CSR.
gas/
* config/tc-riscv.c (check_absolute_expr): Expand comment. New
parameter maybe_csr. If maybe_csr and O_symbol, print CSR name.
(riscv_ip): Add new argument to check_absolute_expr calls.
* testsuite/gas/riscv/bad-csr.d: New.
* testsuite/gas/riscv/bad-csr.l: New.
* testsuite/gas/riscv/bad-csr.s: New.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-riscv.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c index 454f283..f657023 100644 --- a/gas/config/tc-riscv.c +++ b/gas/config/tc-riscv.c @@ -993,13 +993,18 @@ normalize_constant_expr (expressionS *ex) - 0x80000000); } -/* Fail if an expression is not a constant. */ +/* Fail if an expression EX is not a constant. IP is the instruction using EX. + MAYBE_CSR is true if the symbol may be an unrecognized CSR name. */ static void -check_absolute_expr (struct riscv_cl_insn *ip, expressionS *ex) +check_absolute_expr (struct riscv_cl_insn *ip, expressionS *ex, + bfd_boolean maybe_csr) { if (ex->X_op == O_big) as_bad (_("unsupported large constant")); + else if (maybe_csr && ex->X_op == O_symbol) + as_bad (_("unknown CSR `%s'"), + S_GET_NAME (ex->X_add_symbol)); else if (ex->X_op != O_constant) as_bad (_("Instruction %s requires absolute expression"), ip->insn_mo->name); @@ -1744,7 +1749,7 @@ rvc_lui: case '<': /* Shift amount, 0 - 31. */ my_getExpression (imm_expr, s); - check_absolute_expr (ip, imm_expr); + check_absolute_expr (ip, imm_expr, FALSE); if ((unsigned long) imm_expr->X_add_number > 31) as_bad (_("Improper shift amount (%lu)"), (unsigned long) imm_expr->X_add_number); @@ -1755,7 +1760,7 @@ rvc_lui: case '>': /* Shift amount, 0 - (XLEN-1). */ my_getExpression (imm_expr, s); - check_absolute_expr (ip, imm_expr); + check_absolute_expr (ip, imm_expr, FALSE); if ((unsigned long) imm_expr->X_add_number >= xlen) as_bad (_("Improper shift amount (%lu)"), (unsigned long) imm_expr->X_add_number); @@ -1766,7 +1771,7 @@ rvc_lui: case 'Z': /* CSRRxI immediate. */ my_getExpression (imm_expr, s); - check_absolute_expr (ip, imm_expr); + check_absolute_expr (ip, imm_expr, FALSE); if ((unsigned long) imm_expr->X_add_number > 31) as_bad (_("Improper CSRxI immediate (%lu)"), (unsigned long) imm_expr->X_add_number); @@ -1781,7 +1786,7 @@ rvc_lui: else { my_getExpression (imm_expr, s); - check_absolute_expr (ip, imm_expr); + check_absolute_expr (ip, imm_expr, TRUE); if ((unsigned long) imm_expr->X_add_number > 0xfff) as_bad (_("Improper CSR address (%lu)"), (unsigned long) imm_expr->X_add_number); |