[thirdparty/gcc.git] / gcc / config / bpf / bpf.opt

; Options for the eBPF compiler port.

; Copyright (C) 2019-2024 Free Software Foundation, Inc.
;
; This file is part of GCC.
;
; GCC is free software; you can redistribute it and/or modify it under
; the terms of the GNU General Public License as published by the Free
; Software Foundation; either version 3, or (at your option) any later
; version.
;
; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
; WARRANTY; without even the implied warranty of MERCHANTABILITY or
; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
; for more details.
;
; You should have received a copy of the GNU General Public License
; along with GCC; see the file COPYING3.  If not see
; <http://www.gnu.org/licenses/>.

HeaderInclude
config/bpf/bpf-opts.h

; Use xBPF extensions.

mxbpf
Target Mask(XBPF)
Generate xBPF.

; Selecting big endian or little endian targets.

mbig-endian
Target RejectNegative Mask(BIG_ENDIAN)
Generate big-endian eBPF.

mlittle-endian
Target RejectNegative InverseMask(BIG_ENDIAN)
Generate little-endian eBPF.

mframe-limit=
Target Joined RejectNegative UInteger IntegerRange(0, 32767) Var(bpf_frame_limit) Init(32767)
Set a hard limit for the size of each stack frame, in bytes.

mco-re
Target Mask(BPF_CORE)
Generate all necessary information for BPF Compile Once - Run Everywhere.

; Selecting BPF ISA features and versions

mjmpext
Target Var(bpf_has_jmpext) Init(-1)
Enable extra conditional-branch instructions j(s)lt and j(s)le.

malu32
Target Var(bpf_has_alu32) Init(-1)
Enable 32-bit ALU instructions.

mjmp32
Target Var(bpf_has_jmp32) Init(-1)
Enable 32-bit jump instructions.

mv3-atomics
Target Var(bpf_has_v3_atomics) Init(-1)
Enable general atomic operations introduced in v3 ISA.

mbswap
Target Var(bpf_has_bswap) Init(-1)
Enable byte swap instructions.

msdiv
Target Var(bpf_has_sdiv) Init(-1)
Enable signed division and modulus instructions.

msmov
Target Var(bpf_has_smov) Init(-1)
Enable signed move and memory load instructions.

mcpu=
Target RejectNegative Joined Var(bpf_isa) Enum(bpf_isa) Init(ISA_V4)

Enum
Name(bpf_isa) Type(enum bpf_isa_version)

EnumValue
Enum(bpf_isa) String(v1) Value(ISA_V1)

EnumValue
Enum(bpf_isa) String(v2) Value(ISA_V2)

EnumValue
Enum(bpf_isa) String(v3) Value(ISA_V3)

EnumValue
Enum(bpf_isa) String(v4) Value(ISA_V4)

masm=
Target RejectNegative Joined Var(asm_dialect) Enum(asm_dialect) Init(ASM_NORMAL)
Use given assembler dialect.

Enum
Name(asm_dialect) Type(enum bpf_asm_dialect)
Known assembler dialects (for use with the -masm= option)

EnumValue
Enum(asm_dialect) String(normal) Value(ASM_NORMAL)

EnumValue
Enum(asm_dialect) String(pseudoc) Value(ASM_PSEUDOC)
Commit	Line	Data
91dfef96 JM	1	; Options for the eBPF compiler port.
91dfef96 JM	2
a945c346	3	; Copyright (C) 2019-2024 Free Software Foundation, Inc.
91dfef96 JM	4	;
	5	; This file is part of GCC.
	6	;
	7	; GCC is free software; you can redistribute it and/or modify it under
	8	; the terms of the GNU General Public License as published by the Free
	9	; Software Foundation; either version 3, or (at your option) any later
	10	; version.
	11	;
	12	; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
	13	; WARRANTY; without even the implied warranty of MERCHANTABILITY or
	14	; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	15	; for more details.
	16	;
	17	; You should have received a copy of the GNU General Public License
	18	; along with GCC; see the file COPYING3. If not see
	19	; <http://www.gnu.org/licenses/>.
	20
	21	HeaderInclude
	22	config/bpf/bpf-opts.h
	23
51e10276 JM	24	; Use xBPF extensions.
	25
	26	mxbpf
eece52b5	27	Target Mask(XBPF)
51e10276 JM	28	Generate xBPF.
51e10276 JM	29
91dfef96 JM	30	; Selecting big endian or little endian targets.
	31
	32	mbig-endian
eece52b5	33	Target RejectNegative Mask(BIG_ENDIAN)
91dfef96 JM	34	Generate big-endian eBPF.
	35
	36	mlittle-endian
eece52b5	37	Target RejectNegative InverseMask(BIG_ENDIAN)
91dfef96 JM	38	Generate little-endian eBPF.
	39
	40	mframe-limit=
35b5762a	41	Target Joined RejectNegative UInteger IntegerRange(0, 32767) Var(bpf_frame_limit) Init(32767)
91dfef96	42	Set a hard limit for the size of each stack frame, in bytes.
e29a9607 IB	43
	44	mco-re
	45	Target Mask(BPF_CORE)
	46	Generate all necessary information for BPF Compile Once - Run Everywhere.
5b2ab1d3 DF	47
	48	; Selecting BPF ISA features and versions
	49
	50	mjmpext
	51	Target Var(bpf_has_jmpext) Init(-1)
	52	Enable extra conditional-branch instructions j(s)lt and j(s)le.
	53
	54	malu32
	55	Target Var(bpf_has_alu32) Init(-1)
	56	Enable 32-bit ALU instructions.
	57
	58	mjmp32
	59	Target Var(bpf_has_jmp32) Init(-1)
	60	Enable 32-bit jump instructions.
	61
db189d02 DF	62	mv3-atomics
	63	Target Var(bpf_has_v3_atomics) Init(-1)
	64	Enable general atomic operations introduced in v3 ISA.
	65
f1e34551 JM	66	mbswap
	67	Target Var(bpf_has_bswap) Init(-1)
	68	Enable byte swap instructions.
	69
4be3919f JM	70	msdiv
	71	Target Var(bpf_has_sdiv) Init(-1)
	72	Enable signed division and modulus instructions.
	73
14dab1a1 DF	74	msmov
	75	Target Var(bpf_has_smov) Init(-1)
	76	Enable signed move and memory load instructions.
	77
5b2ab1d3	78	mcpu=
f1e34551	79	Target RejectNegative Joined Var(bpf_isa) Enum(bpf_isa) Init(ISA_V4)
5b2ab1d3 DF	80
	81	Enum
	82	Name(bpf_isa) Type(enum bpf_isa_version)
	83
	84	EnumValue
	85	Enum(bpf_isa) String(v1) Value(ISA_V1)
	86
	87	EnumValue
	88	Enum(bpf_isa) String(v2) Value(ISA_V2)
	89
	90	EnumValue
	91	Enum(bpf_isa) String(v3) Value(ISA_V3)
77d0f9ec	92
f1e34551 JM	93	EnumValue
	94	Enum(bpf_isa) String(v4) Value(ISA_V4)
	95
77d0f9ec CM	96	masm=
	97	Target RejectNegative Joined Var(asm_dialect) Enum(asm_dialect) Init(ASM_NORMAL)
	98	Use given assembler dialect.
	99
	100	Enum
	101	Name(asm_dialect) Type(enum bpf_asm_dialect)
	102	Known assembler dialects (for use with the -masm= option)
	103
	104	EnumValue
	105	Enum(asm_dialect) String(normal) Value(ASM_NORMAL)
	106
	107	EnumValue
	108	Enum(asm_dialect) String(pseudoc) Value(ASM_PSEUDOC)