PATCH [7/10] arm: add 'bxaut' instruction for Armv8.1-M pacbti extension
gas/ 2021-06-11 Andrea Corallo <andrea.corallo@arm.com> * config/tc-arm.c (T16_32_TAB): Add '_bxaut'. (do_t_pacbti_nonop): New function. (insns): Define 'bxaut' insn. * testsuite/gas/arm/armv8_1-m-pacbti.d: Add 'bxaut' test. * testsuite/gas/arm/armv8_1-m-pacbti.s: Likewise. opcodes/ 2021-06-11 Andrea Corallo <andrea.corallo@arm.com> * arm-dis.c (thumb32_opcodes): Add 'bxaut'.
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@ -11463,6 +11463,7 @@ encode_thumb32_addr_mode (int i, bool is_t, bool is_d)
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X(_bflx, 0000, f070e001), \
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X(_bic, 4380, ea200000), \
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X(_bics, 4380, ea300000), \
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X(_bxaut, 0000, fb500f10), \
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X(_cinc, 0000, ea509000), \
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X(_cinv, 0000, ea50a000), \
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X(_cmn, 42c0, eb100f00), \
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@ -22343,6 +22344,18 @@ do_t_pacbti (void)
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inst.instruction = THUMB_OP32 (inst.instruction);
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}
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static void
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do_t_pacbti_nonop (void)
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{
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constraint (!ARM_CPU_HAS_FEATURE (cpu_variant, pacbti_ext),
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_(BAD_PACBTI));
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inst.instruction = THUMB_OP32 (inst.instruction);
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inst.instruction |= inst.operands[0].reg << 12;
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inst.instruction |= inst.operands[1].reg << 16;
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inst.instruction |= inst.operands[2].reg;
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}
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/* Overall per-instruction processing. */
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@ -26333,6 +26346,7 @@ static const struct asm_opcode insns[] =
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#define THUMB_VARIANT & arm_ext_v8_1m_main
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toU("aut", _aut, 3, (R12, LR, SP), t_pacbti),
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ToU("bti", f3af800f, 0, (), noargs),
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toU("bxaut", _bxaut, 3, (RR, RR, RR), t_pacbti_nonop),
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toU("pac", _pac, 3, (R12, LR, SP), t_pacbti),
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toU("pacbti", _pacbti, 3, (R12, LR, SP), t_pacbti),
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toU("cinc", _cinc, 3, (RRnpcsp, RR_ZR, COND), t_cond),
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@ -1,6 +1,6 @@
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#name: Valid Armv8.1-M pointer authentication and branch target identification extention
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#source: armv8_1-m-pacbti.s
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#as: -march=armv8.1-m.main
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#as: -march=armv8.1-m.main+pacbti
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#objdump: -dr --prefix-addresses --show-raw-insn
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.*: +file format .*arm.*
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@ -10,4 +10,5 @@ Disassembly of section .text:
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0[0-9a-f]+ <[^>]+> f3af 800d pacbti r12, lr, sp
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0[0-9a-f]+ <[^>]+> f3af 802d aut r12, lr, sp
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0[0-9a-f]+ <[^>]+> f3af 801d pac r12, lr, sp
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0[0-9a-f]+ <[^>]+> fb54 3f15 bxaut r3, r4, r5
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#...
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@ -6,3 +6,4 @@
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pacbti r12, lr, sp
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aut r12, lr, sp
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pac r12, lr, sp
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bxaut r3, r4, r5
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@ -4658,6 +4658,8 @@ static const struct opcode32 thumb32_opcodes[] =
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0xf3af802d, 0xffffffff, "aut\tr12, lr, sp"},
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{ARM_FEATURE_CORE_HIGH (ARM_EXT2_V8_1M_MAIN),
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0xf3af800f, 0xffffffff, "bti"},
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{ARM_FEATURE_CORE_HIGH_HIGH (ARM_EXT3_PACBTI),
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0xfb500f10, 0xfff00ff0, "bxaut%c\t%12-15r, %16-19r, %0-3r"},
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{ARM_FEATURE_CORE_HIGH (ARM_EXT2_V8_1M_MAIN),
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0xf3af801d, 0xffffffff, "pac\tr12, lr, sp"},
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{ARM_FEATURE_CORE_HIGH (ARM_EXT2_V8_1M_MAIN),
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