From 5feaa09beca04312e51adc69766b0e4bfc181f99 Mon Sep 17 00:00:00 2001 From: Przemyslaw Wirkus Date: Thu, 22 Oct 2020 15:17:10 +0100 Subject: [PATCH] aarch64: Define CSRE system registers This patch introduces CSRE (Call Stack Recorder Extension) system registers. Note: as this is register only extension we do not want to hide these registers behind -march flag going forward (they should be enabled by default). CSRE feature adds CSR PDEC (Decrements Call stack pointer by the size of a Call stack record) instruction. This instruction will be added in a following, separate patch. This change only adds CSRE system registers. gas/ChangeLog: 2020-10-08 Przemyslaw Wirkus * NEWS: Docs update. * testsuite/gas/aarch64/csre-invalid.d: New test. * testsuite/gas/aarch64/csre-invalid.l: New test. * testsuite/gas/aarch64/csre-invalid.s: New test. * testsuite/gas/aarch64/csre.d: New test. * testsuite/gas/aarch64/csre.s: New test. opcodes/ChangeLog: 2020-10-08 Przemyslaw Wirkus * aarch64-opc.c: New CSRE system registers defined. --- gas/NEWS | 3 ++- gas/testsuite/gas/aarch64/csre-invalid.d | 3 +++ gas/testsuite/gas/aarch64/csre-invalid.l | 5 ++++ gas/testsuite/gas/aarch64/csre-invalid.s | 6 +++++ gas/testsuite/gas/aarch64/csre.d | 29 ++++++++++++++++++++++++ gas/testsuite/gas/aarch64/csre.s | 25 ++++++++++++++++++++ opcodes/aarch64-opc.c | 13 +++++++++++ 7 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 gas/testsuite/gas/aarch64/csre-invalid.d create mode 100644 gas/testsuite/gas/aarch64/csre-invalid.l create mode 100644 gas/testsuite/gas/aarch64/csre-invalid.s create mode 100644 gas/testsuite/gas/aarch64/csre.d create mode 100644 gas/testsuite/gas/aarch64/csre.s diff --git a/gas/NEWS b/gas/NEWS index 6da318b4d2..61a69efa66 100644 --- a/gas/NEWS +++ b/gas/NEWS @@ -15,7 +15,8 @@ Add support for Cortex-R82, Neoverse V1, and Neoverse N2 for ARM. * Add support for ETMv4 (Embedded Trace Macrocell), ETE (Embedded Trace - Extension) and TRBE (Trace Buffer Extension) system registers for AArch64. + Extension), TRBE (Trace Buffer Extension) and CSRE (Call Stack Recorder + Extension) system registers for AArch64. * Add support for Armv8-R AArch64. diff --git a/gas/testsuite/gas/aarch64/csre-invalid.d b/gas/testsuite/gas/aarch64/csre-invalid.d new file mode 100644 index 0000000000..f273b65010 --- /dev/null +++ b/gas/testsuite/gas/aarch64/csre-invalid.d @@ -0,0 +1,3 @@ +#name: Invalid CSRE System registers usage +#source: csre-invalid.s +#warning_output: csre-invalid.l diff --git a/gas/testsuite/gas/aarch64/csre-invalid.l b/gas/testsuite/gas/aarch64/csre-invalid.l new file mode 100644 index 0000000000..be3d4c4b75 --- /dev/null +++ b/gas/testsuite/gas/aarch64/csre-invalid.l @@ -0,0 +1,5 @@ +.*: Assembler messages: +.*: Warning: specified register cannot be written to at operand 1 -- `msr csridr_el0,x0' +.*: Warning: specified register cannot be written to at operand 1 -- `msr csrptridx_el0,x0' +.*: Warning: specified register cannot be written to at operand 1 -- `msr csrptridx_el1,x0' +.*: Warning: specified register cannot be written to at operand 1 -- `msr csrptridx_el2,x0' diff --git a/gas/testsuite/gas/aarch64/csre-invalid.s b/gas/testsuite/gas/aarch64/csre-invalid.s new file mode 100644 index 0000000000..424f50a3fe --- /dev/null +++ b/gas/testsuite/gas/aarch64/csre-invalid.s @@ -0,0 +1,6 @@ +/* Write to read-only CSRE system registers. */ + +msr csridr_el0 ,x0 +msr csrptridx_el0 ,x0 +msr csrptridx_el1 ,x0 +msr csrptridx_el2 ,x0 diff --git a/gas/testsuite/gas/aarch64/csre.d b/gas/testsuite/gas/aarch64/csre.d new file mode 100644 index 0000000000..ac77d4ac1a --- /dev/null +++ b/gas/testsuite/gas/aarch64/csre.d @@ -0,0 +1,29 @@ +#name: CSRE System registers +#objdump: -dr + +.*: file format .* + + +Disassembly of section \.text: + +0+ <.*>: +[^:]+: d5338000 mrs x0, csrcr_el0 +[^:]+: d5338020 mrs x0, csrptr_el0 +[^:]+: d5338040 mrs x0, csridr_el0 +[^:]+: d5338060 mrs x0, csrptridx_el0 +[^:]+: d5308000 mrs x0, csrcr_el1 +[^:]+: d5358000 mrs x0, csrcr_el12 +[^:]+: d5308020 mrs x0, csrptr_el1 +[^:]+: d5358020 mrs x0, csrptr_el12 +[^:]+: d5308060 mrs x0, csrptridx_el1 +[^:]+: d5348000 mrs x0, csrcr_el2 +[^:]+: d5348020 mrs x0, csrptr_el2 +[^:]+: d5348060 mrs x0, csrptridx_el2 +[^:]+: d5138000 msr csrcr_el0, x0 +[^:]+: d5138020 msr csrptr_el0, x0 +[^:]+: d5108000 msr csrcr_el1, x0 +[^:]+: d5158000 msr csrcr_el12, x0 +[^:]+: d5108020 msr csrptr_el1, x0 +[^:]+: d5158020 msr csrptr_el12, x0 +[^:]+: d5148000 msr csrcr_el2, x0 +[^:]+: d5148020 msr csrptr_el2, x0 diff --git a/gas/testsuite/gas/aarch64/csre.s b/gas/testsuite/gas/aarch64/csre.s new file mode 100644 index 0000000000..bede41cf37 --- /dev/null +++ b/gas/testsuite/gas/aarch64/csre.s @@ -0,0 +1,25 @@ +/* Call Stack Recorder Extension system registers. */ + +/* Read from system registers. */ +mrs x0, csrcr_el0 +mrs x0, csrptr_el0 +mrs x0, csridr_el0 +mrs x0, csrptridx_el0 +mrs x0, csrcr_el1 +mrs x0, csrcr_el12 +mrs x0, csrptr_el1 +mrs x0, csrptr_el12 +mrs x0, csrptridx_el1 +mrs x0, csrcr_el2 +mrs x0, csrptr_el2 +mrs x0, csrptridx_el2 + +/* Write to system registers. */ +msr csrcr_el0, x0 +msr csrptr_el0, x0 +msr csrcr_el1, x0 +msr csrcr_el12, x0 +msr csrptr_el1, x0 +msr csrptr_el12, x0 +msr csrcr_el2, x0 +msr csrptr_el2, x0 diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c index 5c8d8ec644..b97d05563f 100644 --- a/opcodes/aarch64-opc.c +++ b/opcodes/aarch64-opc.c @@ -4541,6 +4541,19 @@ const aarch64_sys_reg aarch64_sys_regs [] = SR_CORE ("trclar", CPENC (2,1,C7,C12,6), F_REG_WRITE), SR_CORE ("trcoslar", CPENC (2,1,C1,C0,4), F_REG_WRITE), + SR_CORE ("csrcr_el0", CPENC (2,3,C8,C0,0), 0), + SR_CORE ("csrptr_el0", CPENC (2,3,C8,C0,1), 0), + SR_CORE ("csridr_el0", CPENC (2,3,C8,C0,2), F_REG_READ), + SR_CORE ("csrptridx_el0", CPENC (2,3,C8,C0,3), F_REG_READ), + SR_CORE ("csrcr_el1", CPENC (2,0,C8,C0,0), 0), + SR_CORE ("csrcr_el12", CPENC (2,5,C8,C0,0), 0), + SR_CORE ("csrptr_el1", CPENC (2,0,C8,C0,1), 0), + SR_CORE ("csrptr_el12", CPENC (2,5,C8,C0,1), 0), + SR_CORE ("csrptridx_el1", CPENC (2,0,C8,C0,3), F_REG_READ), + SR_CORE ("csrcr_el2", CPENC (2,4,C8,C0,0), 0), + SR_CORE ("csrptr_el2", CPENC (2,4,C8,C0,1), 0), + SR_CORE ("csrptridx_el2", CPENC (2,4,C8,C0,3), F_REG_READ), + { 0, CPENC (0,0,0,0,0), 0, 0 } }; -- 2.34.1