[PATCH] bpf: fix error conversion from long unsigned int to unsigned int [-Werror=overflow]
Guillermo E. Martinez
guillermo.e.martinez@oracle.com
Fri Jan 6 07:58:16 GMT 2023
Hello,
This patch is meant to fix compiling errors when maintainer mode is
enable to BPF target.
Please let me know your comments, I'll really appreciate them.
Kind regards,
guillermo
--
Regenerate 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 +++++++++++++++++++++++--------------------
3 files changed, 31 insertions(+), 27 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 */
{
--
2.39.0
More information about the Binutils
mailing list