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Alex Coplan 14962256b3 [PATCH]: aarch64: Refactor representation of system registers
Prior to this patch, the information describing the AArch64 system
registers was separate from the information describing which system
registers are available depending on the CPU feature set. Indeed, the
latter was implemented as a separate function from the main table with
the system register information.

This patch remedies this situation and puts the feature information into
the system register table itself.

This has several advantages:

 * Having all the information described in one place is easier to
   maintain.
 * The logic to check whether a system register is supported now becomes
   trivial (and much more efficient).

Since this patch ended up touching every line of the system register
table, I took the opportunity to make the formatting more consistent and
remove some redundant comments.

Note that there is still more refactoring that could be done along the
same lines here (e.g. with the TLB instructions) but this seemed like a
reasonable first pass.

Testing:

 * Regression tested an x64 -> aarch64-none-elf cross binutils.
 * Built aarch64-none-elf cross toolchain, checked newlib startup
   code still works.
 * Bootstrapped binutils on aarch64-linux-gnu, regression tested.
 * Built aarch64 kernel using new binutils with allyesconfig.

OK for master? If so, I'll need a maintainer to commit on my behalf
since I don't have write access.

Thanks,
Alex

---

include/ChangeLog:

2020-06-11  Alex Coplan  <alex.coplan@arm.com>

	* opcode/aarch64.h (aarch64_sys_reg): Add required features to struct
	describing system registers.

opcodes/ChangeLog:

2020-06-11  Alex Coplan  <alex.coplan@arm.com>

	* aarch64-opc.c (SYSREG): New macro for describing system registers.
	(SR_CORE): Likewise.
	(SR_FEAT): Likewise.
	(SR_RNG): Likewise.
	(SR_V8_1): Likewise.
	(SR_V8_2): Likewise.
	(SR_V8_3): Likewise.
	(SR_V8_4): Likewise.
	(SR_PAN): Likewise.
	(SR_RAS): Likewise.
	(SR_SSBS): Likewise.
	(SR_SVE): Likewise.
	(SR_ID_PFR2): Likewise.
	(SR_PROFILE): Likewise.
	(SR_MEMTAG): Likewise.
	(SR_SCXTNUM): Likewise.
	(aarch64_sys_regs): Refactor to store feature information in the table.
	(aarch64_sys_reg_supported_p): Collapse logic for system registers
	that now describe their own features.
	(aarch64_pstatefield_supported_p): Likewise.
2020-06-11 12:34:37 +01:00
bfd PR26107, Compilation failure in pdp11.c 2020-06-11 15:50:33 +09:30
binutils Re: asan: readelf: process_mips_specific buffer overflow 2020-06-11 14:50:48 +09:30
config
contrib
cpu cpu,gas,opcodes: remove no longer needed workaround from the BPF port 2020-06-04 16:17:42 +02:00
elfcpp Rename PowerPC64 pcrel GOT TLS relocations 2020-06-06 14:44:32 +09:30
etc
gas [PATCH] gas/doc: improve AVR modifiers wording. 2020-06-09 11:13:39 +01:00
gdb gdb: fix whitespaces in ChangeLog 2020-06-10 23:00:20 -04:00
gdbserver Don't close process handle provided by WaitForDebugEvent 2020-05-27 19:20:01 +02:00
gdbsupport gdbsupport: Drop now unused function 'stringify_argv' 2020-05-25 11:40:35 -04:00
gnulib
gold Rename PowerPC64 pcrel GOT TLS relocations 2020-06-06 14:44:32 +09:30
gprof Replace "if (x) free (x)" with "free (x)", gprof 2020-05-21 10:45:33 +09:30
include [PATCH]: aarch64: Refactor representation of system registers 2020-06-11 12:34:37 +01:00
intl
ld Run certain ld-plugun lto tests only for ELF 2020-06-11 18:22:42 +09:30
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libdecnumber
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opcodes [PATCH]: aarch64: Refactor representation of system registers 2020-06-11 12:34:37 +01:00
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