From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1944) id E4A003858C32; Wed, 10 Apr 2024 10:48:28 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E4A003858C32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1712746108; bh=p0xdBf/yh+zQe89Nv4sBQpGeXRocUeOy9jH/vLLtQQ4=; h=From:To:Subject:Date:From; b=oPwduBeQ4y/SXCTM1HAK4PFn/f8Of32BWehAyG7dpaZr3w0vFF7oV9HSYXilAg6Wa frZHpkA9+hTdJ/tjiLKtvz1IV+1ZgEQ7GRwYdabucG9w2i/QydHqtGHL7VSpDf3JfM jQL80DvZ2tcR8z4TIA26xFa7Zh48CBSlLFhQaewU= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Szabolcs Nagy To: gcc-cvs@gcc.gnu.org Subject: [gcc(refs/vendors/ARM/heads/gcs)] aarch64: Add GCS builtins X-Act-Checkin: gcc X-Git-Author: Szabolcs Nagy X-Git-Refname: refs/vendors/ARM/heads/gcs X-Git-Oldrev: 57aec9c418f837bf427d8317bebdc0f825cbb043 X-Git-Newrev: 4880a14b6222839396bcb93ee27669db4e88ff01 Message-Id: <20240410104828.E4A003858C32@sourceware.org> Date: Wed, 10 Apr 2024 10:48:28 +0000 (GMT) List-Id: https://gcc.gnu.org/g:4880a14b6222839396bcb93ee27669db4e88ff01 commit 4880a14b6222839396bcb93ee27669db4e88ff01 Author: Szabolcs Nagy Date: Tue May 9 16:21:28 2023 +0100 aarch64: Add GCS builtins Add new builtins for GCS: void *__builtin_aarch64_gcspr (void) uint64_t __builtin_aarch64_gcspopm (void) void *__builtin_aarch64_gcsss (void *) The builtins are always enabled, but should be used behind runtime checks in case the target does not support GCS. They are thin wrappers around the corresponding instructions. The GCS pointer is modelled with void * type (normal stores do not work on GCS memory, but it is writable via the gcsss operation or via GCSSTR if enabled so not const) and an entry on the GCS is modelled with uint64_t (since it has fixed size and can be a token that's not a pointer). gcc/ChangeLog: * config/aarch64/aarch64-builtins.cc (enum aarch64_builtins): Add AARCH64_BUILTIN_GCSPR, AARCH64_BUILTIN_GCSPOPM, AARCH64_BUILTIN_GCSSS. (aarch64_init_gcs_builtins): New. (aarch64_general_init_builtins): Call aarch64_init_gcs_builtins. (aarch64_expand_gcs_builtin): New. (aarch64_general_expand_builtin): Call aarch64_expand_gcs_builtin. Diff: --- gcc/config/aarch64/aarch64-builtins.cc | 70 ++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/gcc/config/aarch64/aarch64-builtins.cc b/gcc/config/aarch64/aarch64-builtins.cc index 1c08f56ab6b..30c977586f9 100644 --- a/gcc/config/aarch64/aarch64-builtins.cc +++ b/gcc/config/aarch64/aarch64-builtins.cc @@ -790,6 +790,9 @@ enum aarch64_builtins AARCH64_PLIX, /* Armv8.9-A / Armv9.4-A builtins. */ AARCH64_BUILTIN_CHKFEAT, + AARCH64_BUILTIN_GCSPR, + AARCH64_BUILTIN_GCSPOPM, + AARCH64_BUILTIN_GCSSS, AARCH64_BUILTIN_MAX }; @@ -2041,6 +2044,29 @@ aarch64_init_fpsr_fpcr_builtins (void) AARCH64_BUILTIN_SET_FPSR64); } +/* Add builtins for Guarded Control Stack instructions. */ + +static void +aarch64_init_gcs_builtins (void) +{ + tree ftype; + + ftype = build_function_type_list (ptr_type_node, NULL); + aarch64_builtin_decls[AARCH64_BUILTIN_GCSPR] + = aarch64_general_add_builtin ("__builtin_aarch64_gcspr", ftype, + AARCH64_BUILTIN_GCSPR); + + ftype = build_function_type_list (uint64_type_node, NULL); + aarch64_builtin_decls[AARCH64_BUILTIN_GCSPOPM] + = aarch64_general_add_builtin ("__builtin_aarch64_gcspopm", ftype, + AARCH64_BUILTIN_GCSPOPM); + + ftype = build_function_type_list (ptr_type_node, ptr_type_node, NULL); + aarch64_builtin_decls[AARCH64_BUILTIN_GCSSS] + = aarch64_general_add_builtin ("__builtin_aarch64_gcsss", ftype, + AARCH64_BUILTIN_GCSSS); +} + /* Initialize all builtins in the AARCH64_BUILTIN_GENERAL group. */ void @@ -2092,6 +2118,8 @@ aarch64_general_init_builtins (void) = aarch64_general_add_builtin ("__builtin_aarch64_chkfeat", ftype_chkfeat, AARCH64_BUILTIN_CHKFEAT); + aarch64_init_gcs_builtins (); + if (in_lto_p) handle_arm_acle_h (); } @@ -3020,6 +3048,43 @@ aarch64_expand_fpsr_fpcr_getter (enum insn_code icode, machine_mode mode, return op.value; } +/* Expand GCS builtin EXP with code FCODE, putting the result + int TARGET. If IGNORE is true the return value is ignored. */ + +rtx +aarch64_expand_gcs_builtin (tree exp, rtx target, int fcode, int ignore) +{ + if (fcode == AARCH64_BUILTIN_GCSPR) + { + expand_operand op; + create_output_operand (&op, target, DImode); + expand_insn (CODE_FOR_aarch64_load_gcspr, 1, &op); + return op.value; + } + if (fcode == AARCH64_BUILTIN_GCSPOPM && ignore) + { + expand_insn (CODE_FOR_aarch64_gcspopm_xzr, 0, 0); + return target; + } + if (fcode == AARCH64_BUILTIN_GCSPOPM) + { + expand_operand op; + create_output_operand (&op, target, Pmode); + expand_insn (CODE_FOR_aarch64_gcspopm, 1, &op); + return op.value; + } + if (fcode == AARCH64_BUILTIN_GCSSS) + { + expand_operand ops[2]; + rtx op1 = expand_normal (CALL_EXPR_ARG (exp, 0)); + create_output_operand (&ops[0], target, Pmode); + create_input_operand (&ops[1], op1, Pmode); + expand_insn (CODE_FOR_aarch64_gcsss, 2, ops); + return ops[0].value; + } + gcc_unreachable (); +} + /* Expand an expression EXP that calls built-in function FCODE, with result going to TARGET if that's convenient. IGNORE is true if the result of the builtin is ignored. */ @@ -3155,6 +3220,11 @@ aarch64_general_expand_builtin (unsigned int fcode, tree exp, rtx target, emit_move_insn (target, x16_reg); return target; } + + case AARCH64_BUILTIN_GCSPR: + case AARCH64_BUILTIN_GCSPOPM: + case AARCH64_BUILTIN_GCSSS: + return aarch64_expand_gcs_builtin (exp, target, fcode, ignore); } if (fcode >= AARCH64_SIMD_BUILTIN_BASE && fcode <= AARCH64_SIMD_BUILTIN_MAX)