From 7f6ebecd56e690012b05af0a492280765b17f186 Mon Sep 17 00:00:00 2001 From: "Guillermo E. Martinez" Date: Fri, 3 Feb 2023 11:17:49 -0600 Subject: [PATCH] bpf: fix error conversion from long unsigned int to unsigned int [-Werror=overflow] MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Regenerating BPF target using the maintainer mode emits: .../opcodes/bpf-opc.c:57:11: error: conversion from ‘long unsigned int’ to ‘unsigned int’ changes value from ‘18446744073709486335’ to ‘4294902015’ [-Werror=overflow] 57 | 64, 64, 0xffffffffffff00ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } The use of a narrow size to handle the mask CGEN in instruction format is causing this error. Additionally eBPF `call' instructions constructed by expressions using symbols (BPF_PSEUDO_CALL) emits annotations in `src' field of the instruction, used to identify BPF target endianness. cpu/ * bpf.cpu (define-call-insn): Remove `src' field from instruction mask. include/ *opcode/cge.h (CGEN_IFMT): Adjust mask bit width. opcodes/ * bpf-opc.c: Regenerate. --- cpu/bpf.cpu | 2 +- include/opcode/cgen.h | 2 +- opcodes/bpf-opc.c | 54 +++++++++++++++++++++++-------------------- opcodes/cgen-dis.c | 2 +- 4 files changed, 32 insertions(+), 28 deletions(-) diff --git a/cpu/bpf.cpu b/cpu/bpf.cpu index 13dde7094c8..2ae74fc4c18 100644 --- a/cpu/bpf.cpu +++ b/cpu/bpf.cpu @@ -768,7 +768,7 @@ "call" (endian-isas x-endian) "call $disp32" - (+ disp32 (f-offset16 0) (f-regs 0) + (+ disp32 (f-offset16 0) (.sym src x-endian) ((.sym f-dst x-endian) 0) OP_CLASS_JMP OP_SRC_K OP_CODE_CALL) (c-call VOID "bpfbf_call" disp32 (ifield (.sym f-src x-endian))) diff --git a/include/opcode/cgen.h b/include/opcode/cgen.h index 36b88f1b5fe..6c0732b4b25 100644 --- a/include/opcode/cgen.h +++ b/include/opcode/cgen.h @@ -914,7 +914,7 @@ typedef struct Each insn's value is stored with the insn. The first step in recognizing an insn for disassembly is (opcode & mask) == value. */ - CGEN_INSN_INT mask; + CGEN_INSN_LGUINT mask; #define CGEN_IFMT_MASK(ifmt) ((ifmt)->mask) /* Instruction fields. diff --git a/opcodes/bpf-opc.c b/opcodes/bpf-opc.c index a6d8a7dd3ca..1cc06f7cbf6 100644 --- a/opcodes/bpf-opc.c +++ b/opcodes/bpf-opc.c @@ -50,99 +50,103 @@ static const CGEN_IFMT ifmt_empty ATTRIBUTE_UNUSED = { }; static const CGEN_IFMT ifmt_addile ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfffff0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_addrle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffffffff00ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_negle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfffffffffffff0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_addibe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffff0fff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_addrbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffffffff00ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_negbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffffffff0fff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_endlele ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfffff0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_endlebe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffff0fff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_lddwle ATTRIBUTE_UNUSED = { - 64, 128, 0xff, { { F (F_IMM64) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 128, 0xfffff0ff, { { F (F_IMM64) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_lddwbe ATTRIBUTE_UNUSED = { - 64, 128, 0xff, { { F (F_IMM64) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 128, 0xffff0fff, { { F (F_IMM64) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ldabsw ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ldindwle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffff0fff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ldindwbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfffff0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ldxwle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff000000ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ldxwbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff000000ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_stble ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xf0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_DSTLE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_stbbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_MODE) }, { F (F_OP_SIZE) }, { F (F_SRCBE) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_jeqile ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xf0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_jeqrle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff000000ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_jeqibe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xfff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_jeqrbe ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff000000ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_callle ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_CODE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffff0fff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_SRCLE) }, { F (F_OP_CODE) }, { F (F_DSTLE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } +}; + +static const CGEN_IFMT ifmt_callbe ATTRIBUTE_UNUSED = { + 64, 64, 0xfffff0ff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_DSTBE) }, { F (F_OP_CODE) }, { F (F_SRCBE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_ja ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_CODE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffff0000ffff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_CODE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; static const CGEN_IFMT ifmt_exit ATTRIBUTE_UNUSED = { - 64, 64, 0xff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_CODE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } + 64, 64, 0xffffffffffffffff, { { F (F_IMM32) }, { F (F_OFFSET16) }, { F (F_REGS) }, { F (F_OP_CODE) }, { F (F_OP_SRC) }, { F (F_OP_CLASS) }, { 0 } } }; #undef F @@ -1646,7 +1650,7 @@ static const CGEN_OPCODE bpf_cgen_insn_opcode_table[MAX_INSNS] = { { 0, 0, 0, 0 }, { { MNEM, ' ', OP (DISP32), 0 } }, - & ifmt_callle, { 0x85 } + & ifmt_callbe, { 0x85 } }, /* call $dstle */ { diff --git a/opcodes/cgen-dis.c b/opcodes/cgen-dis.c index de315d90cfc..90746a845ed 100644 --- a/opcodes/cgen-dis.c +++ b/opcodes/cgen-dis.c @@ -39,7 +39,7 @@ static void add_insn_to_hash_chain (CGEN_INSN_LIST *, static int count_decodable_bits (const CGEN_INSN *insn) { - unsigned mask = CGEN_INSN_BASE_MASK (insn); + CGEN_INSN_LGUINT mask = CGEN_INSN_BASE_MASK (insn); #if GCC_VERSION >= 3004 return __builtin_popcount (mask); #else -- 2.30.2