From: "Guillermo E. Martinez" <guillermo.e.martinez@oracle.com>
To: binutils@sourceware.org
Cc: jose.marchesi@oracle.com,
"Guillermo E. Martinez" <guillermo.e.martinez@oracle.com>
Subject: [PATCH] bpf: fix error conversion from long unsigned int to unsigned int [-Werror=overflow]
Date: Sat, 7 Jan 2023 09:47:43 -0600 [thread overview]
Message-ID: <20230107154743.624854-1-guillermo.e.martinez@oracle.com> (raw)
In-Reply-To: <20230106075816.387489-1-guillermo.e.martinez@oracle.com>
This is patch-v2 meant to fix compiling errors when maintainer mode is
enable to BPF target.
Changes from v1:
+ Adjust type for mask bit width in cgen-dis.c.
+ Looking for regressions on 134 CGEN targets.
+ Tweak change log message.
Please let me know your comments, I'll really appreciate them.
Kind regards,
guillermo
--
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, it's used to identify BPF
target endianness.
Regression tests to the following targets were done:
bpf arm-linuxeabi arm-nacl arm-netbsdelf arm-nto arm-pe
arm-symbianelf arm-vxworks arm-wince-pe aarch64-linux alpha-dec-vms
alpha-linux alpha-linuxecoff alpha-netbsd alpha-unknown-freebsd4.7
am33_2.0-linux arc-linux-uclibc avr-elf bfin-elf cr16-elf cris-elf
crisv32-linux crx-elf d10v-elf d30v-elf dlx-elf epiphany-elf fr30-elf
frv-elf frv-linux ft32-elf h8300-elf hppa-linux hppa-hp-hpux10
hppa64-hp-hpux11.23 hppa64-linux mips-linux mips-vxworks mips64-linux
mipsel-linux-gnu mipsisa32el-linux mips64-openbsd mipstx39-elf
ia64-elf ia64-freebsd5 ia64-hpux ia64-linux ia64-netbsd ia64-vms
ip2k-elf iq2000-elf lm32-elf m32c-elf m32r-elf m68hc11-elf
m68hc12-elf m68k-elf m68k-linux m68k-netbsd mcore-elf mcore-pe
mep-elf metag-linux microblaze-elf mmix mn10200-elf mn10300-elf
moxie-elf ms1-elf msp430-elf mt-elf nds32le-elf nios2-linux or1k-elf
pdp11-dec-aout pj-elf powerpc-eabisim powerpc-eabivle powerpc-linux
powerpc-nto powerpc-wrs-vxworks powerpc64-linux powerpcle-cygwin
powerpcle-elf powerpc64le-linux ppc-lynxos pru-elf riscv32-elf
riscv64-elf rl78-elf rs6000-aix4.3.3 rs6000-aix5.1 rx-elf s390-linux
s390x-linux score-elf sh-linux sh-nto sh-pe sh-rtems sh-vxworks
shl-unknown-netbsdelf sparc-aout sparc-linux sparc-vxworks
sparc64-linux sparc-sun-solaris2.12 spu-elf tic30-unknown-aout
tic30-unknown-coff tic4x-coff tic54x-coff tic6x-elf tilegx-linux
tilepro-linux v850-elf vax-netbsdelf visium-elf i386-darwin
i386-lynxos i586-linux i686-nacl i686-pc-beos i686-pc-elf i686-pe
i686-vxworks x86_64-linux x86_64-w64-mingw32 x86_64-nacl xgate-elf
xstormy16-elf xtensa-elf z8k-coff z80-coff.
cpu/
* bpf.cpu (define-call-insn): Add `src' operand field to
the instruction.
include/
*opcode/cge.h (CGEN_IFMT): Adjust mask bit width.
opcodes/
* cgen-dis.c (count_decodable_bits): Adjust type for mask bit width.
* 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
--
2.39.0
next prev parent reply other threads:[~2023-01-07 15:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-06 7:58 Guillermo E. Martinez
2023-01-06 10:39 ` Alan Modra
2023-01-06 15:15 ` Guillermo E. Martinez
2023-01-06 13:56 ` Jose E. Marchesi
2023-01-06 14:16 ` Jose E. Marchesi
2023-01-06 14:34 ` Guillermo E. Martinez
2023-01-07 15:47 ` Guillermo E. Martinez [this message]
2023-01-11 23:37 ` Guillermo E. Martinez
2023-01-11 23:54 ` Jose E. Marchesi
2023-01-12 2:50 ` Alan Modra
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