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authorMatthew Wahab <matthew.wahab@arm.com>2015-06-01 16:00:28 +0100
committerJiong Wang <jiong.wang@arm.com>2015-06-01 16:00:28 +0100
commitf21cce2cacb534428ed6ea96fdb684ad8a4a948a (patch)
tree2da1e9264da3e3e842a0ea36d5ad349eb9c2b278 /opcodes
parent7018c0308ac5d936b68c280bfcdc80bef77225e1 (diff)
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[AArch64][libopcode] Add support for PAN architecture extension
The ARMv8.1 architecture introduced the Privileged Access Never extension. This adds a processor state field PSTATE.PAN which can be accessed using the MRS/MSR instructions. This patch adds support for the PAN architecture feature and processor state field to libopcode. include/opcode 2015-06-01 Matthew Wahab <matthew.wahab@arm.com> * aarch64.h (AARCH64_FEATURE_PAN): New. (aarch64_sys_reg_supported_p): Declare. (aarch64_pstatefield_supported_p): Declare. opcodes/ 2015-06-01 Matthew Wahab <matthew.wahab@arm.com> * aarch64-opc.c (F_ARCHEXT): New. (aarch64_sys_regs): Add "pan". (aarch64_sys_reg_supported_p): New. (aarch64_pstatefields): Add "pan". (aarch64_pstatefield_supported_p): New.
Diffstat (limited to 'opcodes')
-rw-r--r--opcodes/ChangeLog8
-rw-r--r--opcodes/aarch64-opc.c38
2 files changed, 46 insertions, 0 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 9158b14..f4688c8 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,11 @@
+2015-06-01 Matthew Wahab <matthew.wahab@arm.com>
+
+ * aarch64-opc.c (F_ARCHEXT): New.
+ (aarch64_sys_regs): Add "pan".
+ (aarch64_sys_reg_supported_p): New.
+ (aarch64_pstatefields): Add "pan".
+ (aarch64_pstatefield_supported_p): New.
+
2015-06-01 Jan Beulich <jbeulich@suse.com>
* i386-tbl.h: Regenerate.
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index 5ea1384..5c7ef86 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -2723,6 +2723,12 @@ aarch64_print_operand (char *buf, size_t size, bfd_vma pc,
#endif
#define F_DEPRECATED 0x1 /* Deprecated system register. */
+#ifdef F_ARCHEXT
+#undef F_ARCHEXT
+#endif
+#define F_ARCHEXT 0x2 /* Architecture dependent system register. */
+
+
/* TODO there are two more issues need to be resolved
1. handle read-only and write-only system registers
2. handle cpu-implementation-defined system registers. */
@@ -2734,6 +2740,7 @@ const aarch64_sys_reg aarch64_sys_regs [] =
{ "spsel", CPEN_(0,C2,0), 0 },
{ "daif", CPEN_(3,C2,1), 0 },
{ "currentel", CPEN_(0,C2,2), 0 }, /* RO */
+ { "pan", CPEN_(0,C2,3), F_ARCHEXT },
{ "nzcv", CPEN_(3,C2,0), 0 },
{ "fpcr", CPEN_(3,C4,0), 0 },
{ "fpsr", CPEN_(3,C4,1), 0 },
@@ -3043,14 +3050,45 @@ aarch64_sys_reg_deprecated_p (const aarch64_sys_reg *reg)
return (reg->flags & F_DEPRECATED) != 0;
}
+bfd_boolean
+aarch64_sys_reg_supported_p (const aarch64_feature_set features,
+ const aarch64_sys_reg *reg)
+{
+ if (!(reg->flags & F_ARCHEXT))
+ return TRUE;
+
+ /* PAN. Values are from aarch64_sys_regs. */
+ if (reg->value == CPEN_(0,C2,3)
+ && !AARCH64_CPU_HAS_FEATURE (features, AARCH64_FEATURE_PAN))
+ return FALSE;
+
+ return TRUE;
+}
+
const aarch64_sys_reg aarch64_pstatefields [] =
{
{ "spsel", 0x05, 0 },
{ "daifset", 0x1e, 0 },
{ "daifclr", 0x1f, 0 },
+ { "pan", 0x04, F_ARCHEXT },
{ 0, CPENC(0,0,0,0,0), 0 },
};
+bfd_boolean
+aarch64_pstatefield_supported_p (const aarch64_feature_set features,
+ const aarch64_sys_reg *reg)
+{
+ if (!(reg->flags & F_ARCHEXT))
+ return TRUE;
+
+ /* PAN. Values are from aarch64_pstatefields. */
+ if (reg->value == 0x04
+ && !AARCH64_CPU_HAS_FEATURE (features, AARCH64_FEATURE_PAN))
+ return FALSE;
+
+ return TRUE;
+}
+
const aarch64_sys_ins_reg aarch64_sys_regs_ic[] =
{
{ "ialluis", CPENS(0,C7,C1,0), 0 },