Introduce a helper routine defining one CPU device node to fix this
warning :
../hw/ppc/spapr.c: In function ‘spapr_dt_cpus’:
../hw/ppc/spapr.c:812:19: warning: declaration of ‘cs’ shadows a previous local [-Wshadow=compatible-local]
812 | CPUState *cs = rev[i];
| ^~
../hw/ppc/spapr.c:786:15: note: shadowed declaration is here
786 | CPUState *cs;
| ^~
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230918145850.241074-4-clg@kaod.org>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
this fixes numerous warnings of this type :
In file included from ../hw/ppc/spapr_pci.c:43:
../hw/ppc/spapr_pci.c: In function ‘spapr_dt_phb’:
../include/hw/ppc/fdt.h:18:13: warning: declaration of ‘ret’ shadows a previous local [-Wshadow=compatible-local]
18 | int ret = (exp); \
| ^~~
../hw/ppc/spapr_pci.c:2355:5: note: in expansion of macro ‘_FDT’
2355 | _FDT(bus_off = fdt_add_subnode(fdt, 0, phb->dtbusname));
| ^~~~
../hw/ppc/spapr_pci.c:2311:24: note: shadowed declaration is here
2311 | int bus_off, i, j, ret;
| ^~~
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230918145850.241074-2-clg@kaod.org>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/intc/openpic.c: In function ‘openpic_gbl_write’:
hw/intc/openpic.c:614:17: warning: declaration of ‘idx’ shadows a previous local [-Wshadow=compatible-local]
614 | int idx;
| ^~~
hw/intc/openpic.c:568:9: note: shadowed declaration is here
568 | int idx;
| ^~~
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904162824.85385-3-philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
softmmu/memory.c: In function ‘mtree_print_mr’:
softmmu/memory.c:3236:27: warning: declaration of ‘ml’ shadows a previous local [-Wshadow=compatible-local]
3236 | MemoryRegionList *ml;
| ^~
softmmu/memory.c:3213:32: note: shadowed declaration is here
3213 | MemoryRegionList *new_ml, *ml, *next_ml;
| ^~
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-22-philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/mips/boston.c:472:5: error: declaration shadows a local variable [-Werror,-Wshadow]
qemu_fdt_setprop_cells(fdt, name, "reg", reg_base, reg_size);
^
include/sysemu/device_tree.h:129:13: note: expanded from macro 'qemu_fdt_setprop_cells'
int i;
^
hw/mips/boston.c:461:9: note: previous declaration is here
int i;
^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-21-philmd@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
linux-user/strace.c: In function ‘print_sockaddr’:
linux-user/strace.c:370:17: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local]
370 | int i;
| ^
linux-user/strace.c:361:9: note: shadowed declaration is here
361 | int i;
| ^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-20-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
util/vhost-user-server.c: In function ‘set_watch’:
util/vhost-user-server.c:274:20: warning: declaration of ‘vu_fd_watch’ shadows a previous local [-Wshadow=compatible-local]
274 | VuFdWatch *vu_fd_watch = g_new0(VuFdWatch, 1);
| ^~~~~~~~~~~
util/vhost-user-server.c:271:16: note: shadowed declaration is here
271 | VuFdWatch *vu_fd_watch = find_vu_fd_watch(server, fd);
| ^~~~~~~~~~~
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-18-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
In file included from crypto/cipher.c:140:
crypto/cipher-gnutls.c.inc: In function ‘qcrypto_gnutls_cipher_encrypt’:
crypto/cipher-gnutls.c.inc:116:17: warning: declaration of ‘err’ shadows a previous local [-Wshadow=compatible-local]
116 | int err = gnutls_cipher_init(&handle, ctx->galg, &gkey, NULL);
| ^~~
crypto/cipher-gnutls.c.inc:94:9: note: shadowed declaration is here
94 | int err;
| ^~~
---
crypto/cipher-gnutls.c.inc: In function ‘qcrypto_gnutls_cipher_decrypt’:
crypto/cipher-gnutls.c.inc:177:17: warning: declaration of ‘err’ shadows a previous local [-Wshadow=compatible-local]
177 | int err = gnutls_cipher_init(&handle, ctx->galg, &gkey, NULL);
| ^~~
crypto/cipher-gnutls.c.inc:154:9: note: shadowed declaration is here
154 | int err;
| ^~~
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-17-philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/nios2/10m50_devboard.c: In function ‘nios2_10m50_ghrd_init’:
hw/nios2/10m50_devboard.c:101:22: warning: declaration of ‘dev’ shadows a previous local [-Wshadow=compatible-local]
101 | DeviceState *dev = qdev_new(TYPE_NIOS2_VIC);
| ^~~
hw/nios2/10m50_devboard.c:60:18: note: shadowed declaration is here
60 | DeviceState *dev;
| ^~~
hw/nios2/10m50_devboard.c:110:18: warning: declaration of ‘i’ shadows a previous local [-Wshadow=compatible-local]
110 | for (int i = 0; i < 32; i++) {
| ^
hw/nios2/10m50_devboard.c:67:9: note: shadowed declaration is here
67 | int i;
| ^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-15-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/m68k/virt.c:263:13: error: declaration shadows a local variable [-Werror,-Wshadow]
BOOTINFOSTR(param_ptr, BI_COMMAND_LINE,
^
hw/m68k/bootinfo.h:47:13: note: expanded from macro 'BOOTINFOSTR'
int i; \
^
hw/m68k/virt.c:130:9: note: previous declaration is here
int i;
^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-13-philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/arm/allwinner-r40.c:412:14: error: declaration shadows a local variable [-Werror,-Wshadow]
for (int i = 0; i < AW_R40_NUM_MMCS; i++) {
^
hw/arm/allwinner-r40.c:299:14: note: previous declaration is here
unsigned i;
^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230904161235.84651-10-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
hw/arm/virt.c:821:22: error: declaration shadows a local variable [-Werror,-Wshadow]
qemu_irq irq = qdev_get_gpio_in(vms->gic,
^
hw/arm/virt.c:803:13: note: previous declaration is here
int irq;
^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230904161235.84651-9-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
target/mips/tcg/nanomips_translate.c.inc:4410:33: error: declaration shadows a local variable [-Werror,-Wshadow]
int32_t imm = extract32(ctx->opcode, 1, 13) |
^
target/mips/tcg/nanomips_translate.c.inc:3577:9: note: previous declaration is here
int imm;
^
target/mips/tcg/translate.c:15578:19: error: declaration shadows a local variable [-Werror,-Wshadow]
for (unsigned i = 1; i < 32; i++) {
^
target/mips/tcg/translate.c:15567:9: note: previous declaration is here
int i;
^
target/mips/tcg/msa_helper.c:7478:13: error: declaration shadows a local variable [-Werror,-Wshadow]
MSA_FLOAT_MAXOP(pwx->w[0], min, pws->w[0], pws->w[0], 32);
^
target/mips/tcg/msa_helper.c:7434:23: note: expanded from macro 'MSA_FLOAT_MAXOP'
float_status *status = &env->active_tc.msa_fp_status;
^
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-5-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Per Peter Maydell analysis [*]:
The hvf_vcpu_exec() function is not documented, but in practice
its caller expects it to return either EXCP_DEBUG (for "this was
a guest debug exception you need to deal with") or something else
(presumably the intention being 0 for OK).
The hvf_sysreg_read() and hvf_sysreg_write() functions are also not
documented, but they return 0 on success, or 1 for a completely
unrecognized sysreg where we've raised the UNDEF exception (but
not if we raised an UNDEF exception for an unrecognized GIC sysreg --
I think this is a bug). We use this return value to decide whether
we need to advance the PC past the insn or not. It's not the same
as the return value we want to return from hvf_vcpu_exec().
Retain the variable as locally scoped but give it a name that
doesn't clash with the other function-scoped variable.
This fixes:
target/arm/hvf/hvf.c:1936:13: error: declaration shadows a local variable [-Werror,-Wshadow]
int ret = 0;
^
target/arm/hvf/hvf.c:1807:9: note: previous declaration is here
int ret;
^
[*] https://lore.kernel.org/qemu-devel/CAFEAcA_e+fU6JKtS+W63wr9cCJ6btu_hT_ydZWOwC0kBkDYYYQ@mail.gmail.com/
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-4-philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Fix:
tcg/tcg.c:2551:27: error: declaration shadows a local variable [-Werror,-Wshadow]
MemOp op = get_memop(oi);
^
tcg/tcg.c:2437:12: note: previous declaration is here
TCGOp *op;
^
accel/tcg/tb-maint.c:245:18: error: declaration shadows a local variable [-Werror,-Wshadow]
for (int i = 0; i < V_L2_SIZE; i++) {
^
accel/tcg/tb-maint.c:210:9: note: previous declaration is here
int i;
^
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20230904161235.84651-2-philmd@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
These are either built because they are dependencies of other targets,
or not needed at all because they are used via extract_objects().
Mark them as "build_by_default: false"; if applicable, mark them
as "fa" so that -Wl,--whole-archive does not interact with the
linker script used for fuzzing.
(The "fa" hack is brittle; updating to Meson 1.1 would allow using
declare_dependency(objects: ...) instead).
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1044
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A new enough libfdt is included in all of Debian 11, Ubuntu 20.04
and MSYS2. It has also been included for several minor releases
in Fedora and openSUSE Leap, as well as in CentOS. Therefore
there is no need anymore to ship the sources together with the QEMU
tarballs.
Keep the wrap file so that it can be used with --enable-download,
but do not ship the sources anymore with either archive-source.sh
or make-release.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A register access error typically means something seriously wrong
happened so that anything bad can happen after that and recovery is
impossible.
Even failing one register access is catastorophic as
architecture-specific code are not written so that it torelates such
failures.
Make sure the VM stop and nothing worse happens if such an error occurs.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-ID: <20221201102728.69751-1-akihiko.odaki@daynix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Our linker script for optionroms specifies only the placement of the
.text section, leaving the linker free to place the remaining sections
at arbitrary places in the file.
Since at least binutils 2.39, the .note.gnu.build-id section is now
being placed at the start of the file, which causes label addresses to
be shifted. For linuxboot_dma.bin that means that the PnP header
(among others) will not be found when determining the type of ROM at
optionrom_setup():
(0x1c is the label _pnph, where the magic "PnP" is)
$ xxd /usr/share/qemu/linuxboot_dma.bin | grep "PnP"
00000010: 0000 0000 0000 0000 0000 1c00 2450 6e50 ............$PnP
$ xxd pc-bios/optionrom/linuxboot_dma.bin | grep "PnP"
00000010: 0000 0000 0000 0000 0000 4c00 2450 6e50 ............$PnP
^bad
Using a freshly built linuxboot_dma.bin ROM results in a broken boot:
SeaBIOS (version rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org)
Booting from Hard Disk...
Boot failed: could not read the boot disk
Booting from Floppy...
Boot failed: could not read the boot disk
No bootable device.
We're not using the build-id section, so pass the --build-id=none
option to the linker to remove it entirely.
Note: In theory, this same issue could happen with any other
section. The ideal solution would be to have all unused sections
discarded in the linker script. However that would be a larger change,
specially for the pvh rom which uses the .bss and COMMON sections so
I'm addressing only the immediate issue here.
Reported-by: Vasiliy Ulyanov <vulyanov@suse.de>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20230926192502.15986-1-farosas@suse.de>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
as this is an effective address and those cannot be signed,
it should not be a signed integer.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230913105326.40832-11-kbastian@mail.uni-paderborn.de>
these are already defined in 'csfr.h.inc'. We don't need to duplicate
these registers.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230913105326.40832-10-kbastian@mail.uni-paderborn.de>
some insns use the result register implicitly as an input. Thus, we
could end up with data from the previous insn spilling over.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230913105326.40832-4-kbastian@mail.uni-paderborn.de>
Variables declared in macros can shadow other variables. Much of the
time, this is harmless, e.g.:
#define _FDT(exp) \
do { \
int ret = (exp); \
if (ret < 0) { \
error_report("error creating device tree: %s: %s", \
#exp, fdt_strerror(ret)); \
exit(1); \
} \
} while (0)
Harmless shadowing in h_client_architecture_support():
target_ulong ret;
[...]
ret = do_client_architecture_support(cpu, spapr, vec, fdt_bufsize);
if (ret == H_SUCCESS) {
_FDT((fdt_pack(spapr->fdt_blob)));
[...]
}
return ret;
However, we can get in trouble when the shadowed variable is used in a
macro argument:
#define QOBJECT(obj) ({ \
typeof(obj) o = (obj); \
o ? container_of(&(o)->base, QObject, base) : NULL; \
})
QOBJECT(o) expands into
({
---> typeof(o) o = (o);
o ? container_of(&(o)->base, QObject, base) : NULL;
})
Unintended variable name capture at --->. We'd be saved by
-Winit-self. But I could certainly construct more elaborate death
traps that don't trigger it.
To reduce the risk of trapping ourselves, we use variable names in
macros that no sane person would use elsewhere. Here's our actual
definition of QOBJECT():
#define QOBJECT(obj) ({ \
typeof(obj) _obj = (obj); \
_obj ? container_of(&(_obj)->base, QObject, base) : NULL; \
})
Works well enough until we nest macro calls. For instance, with
#define qobject_ref(obj) ({ \
typeof(obj) _obj = (obj); \
qobject_ref_impl(QOBJECT(_obj)); \
_obj; \
})
the expression qobject_ref(obj) expands into
({
typeof(obj) _obj = (obj);
qobject_ref_impl(
({
---> typeof(_obj) _obj = (_obj);
_obj ? container_of(&(_obj)->base, QObject, base) : NULL;
}));
_obj;
})
Unintended variable name capture at --->.
The only reliable way to prevent unintended variable name capture is
-Wshadow.
One blocker for enabling it is shadowing hiding in function-like
macros like
qdict_put(dict, "name", qobject_ref(...))
qdict_put() wraps its last argument in QOBJECT(), and the last
argument here contains another QOBJECT().
Use dark preprocessor sorcery to make the macros that give us this
problem use different variable names on every call.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230921121312.1301864-8-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Local variables shadowing other local variables or parameters make the
code needlessly hard to understand. Tracked down with -Wshadow=local.
Clean up: delete inner declarations when they are actually redundant,
else rename variables.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230921121312.1301864-7-armbru@redhat.com>
Local variables shadowing other local variables or parameters make the
code needlessly hard to understand. Tracked down with -Wshadow=local.
Clean up: delete inner declarations when they are actually redundant,
else rename variables.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230921121312.1301864-6-armbru@redhat.com>
Local variables shadowing other local variables or parameters make the
code needlessly hard to understand. Tracked down with -Wshadow=local.
Clean up: rename both the pair of parameters and the pair of local
variables. While there, move the local variables to function scope.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230921121312.1301864-5-armbru@redhat.com>
Local variables shadowing other local variables or parameters make the
code needlessly hard to understand. Tracked down with -Wshadow=local.
Clean up: delete inner declarations when they are actually redundant,
else rename variables.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-ID: <20230921121312.1301864-4-armbru@redhat.com>
Local variables shadowing other local variables or parameters make the
code needlessly hard to understand. Tracked down with -Wshadow=local.
Clean up: delete inner declarations when they are actually redundant,
else rename variables.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Message-ID: <20230921121312.1301864-3-armbru@redhat.com>
qemu_rdma_save_page() reports polling error with error_report(), then
succeeds anyway. This is because the variable holding the polling
status *shadows* the variable the function returns. The latter
remains zero.
Broken since day one, and duplicated more recently.
Fixes: 2da776db48 (rdma: core logic)
Fixes: b390afd8c5 (migration/rdma: Fix out of order wrid)
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Message-ID: <20230921121312.1301864-2-armbru@redhat.com>
Require i/o as the last insn of a TranslationBlock always,
not only with icount. This is required for i/o that alters
the address space, such as a pci config space write.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1866
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Without this we can get see loops through cpu_io_recompile,
in which the cpu makes no progress.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Initialize can_do_io to true if this the TB has CF_LAST_IO
and will consist of a single instruction. This avoids a
set to 0 followed immediately by a set to 1.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Simplify translator_io_start by recording the current
known value of can_do_io within DisasContextBase.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The condition checked is loop invariant; check it only once.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
With CF_NOIRQ and without !CF_USE_ICOUNT, the load isn't used.
Avoid emitting it.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
RSx for d regs and e regs now use the same numbering. This makes sure
that mixing d and e registers in an insn test will not overwrite data
between registers.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-ID: <20230913105326.40832-2-kbastian@mail.uni-paderborn.de>
