OpenE2K
/
binutils-gdb
12
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
binutils-gdb/gas/testsuite/gas/riscv/attribute-14d.d

9 lines
192 B
D
Raw Normal View History

RISC-V: Generate ELF priv attributes if priv instruction are explicited used. We should generate the ELF priv attributes only if, 1. The priv attributes are already set in the assembly file. 2. The CSR are explicited used. 3. The privileged instruction are explicited used. * There are four privileged instruction defined in the v1.11 priv spec: `mret`, `sret`, `wfi` and `sfence.vma`. * `sfence.vm` is dropped in the v1.10 priv spec. * `uret` is actually a N-ext instruction. So it is better to regard it as an user instruction rather than the priv instruction. * `hret` is used to return from traps in H-mode. H-mode is removed since the v1.10 priv spec, but probably be added in the new hypervisor spec. Therefore, `hret` should be controlled by the hypervisor spec rather than priv spec in the future. * `dret` is a debug instruction. We should record the debug spec versions once it is explicited used in the future. gas/ * config/tc-riscv.c (explicit_priv_attr): Rename explicit_csr to explicit_priv_attr. It used to indicate CSR or priv instructions are explictly used. (riscv_is_priv_insn): Return True if it is a privileged instruction. (riscv_ip): Call riscv_is_priv_insn to check whether the instruction is privileged or not. If it is, then set explicit_priv_attr to TRUE. (riscv_write_out_attrs): Clarification of when to generate the elf priv spec attributes. * testsuite/gas/riscv/attribute-11.s: Add comments. * testsuite/gas/riscv/attribute-14.s: New testcase. Use symbol `priv_insn_<n>` to decide which priv instruction is expected to used. (<n> is a to g.) * testsuite/gas/riscv/attribute-14a.d: Likewise. * testsuite/gas/riscv/attribute-14b.d: Likewise. * testsuite/gas/riscv/attribute-14c.d: Likewise. * testsuite/gas/riscv/attribute-14d.d: Likewise. * testsuite/gas/riscv/attribute-14e.d: Likewise.
2020-06-22 10:11:18 +02:00
#as: -march-attr --defsym priv_insn_d=1
#readelf: -A
#source: attribute-14.s
Attribute Section: riscv
File Attributes
Tag_RISCV_arch: [a-zA-Z0-9_\"].*
Tag_RISCV_priv_spec: [0-9_\"].*
#...