* warning: objtool: fn1 uses BP as a scratch register
@ 2019-07-19 18:09 Arnd Bergmann
2019-07-19 18:23 ` Nick Desaulniers
0 siblings, 1 reply; 8+ messages in thread
From: Arnd Bergmann @ 2019-07-19 18:09 UTC (permalink / raw)
To: clang-built-linux, Linux Kernel Mailing List, Josh Poimboeuf,
Peter Zijlstra
A lot of objtool fixes showed up in linux-next, so I looked at some
remaining ones.
This one comes a lot up in some configurations
https://godbolt.org/z/ZZLVD-
struct ov7670_win_size {
int width;
int height;
};
struct ov7670_devtype {
struct ov7670_win_size *win_sizes;
unsigned n_win_sizes;
};
struct ov7670_info {
int min_width;
int min_height;
struct ov7670_devtype devtype;
} a;
int b;
int fn1() {
struct ov7670_info c = a;
int i = 0;
for (; i < c.devtype.n_win_sizes; i++) {
struct ov7670_win_size d = c.devtype.win_sizes[i];
if (c.min_width && d.width < d.height < c.min_height)
if (b)
return 0;
}
return 2;
}
$ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i
$ objtool check --no-unreachable --uaccess ov7670.o
ov7670.o: warning: objtool: fn1 uses BP as a scratch register
Arnd
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:09 warning: objtool: fn1 uses BP as a scratch register Arnd Bergmann @ 2019-07-19 18:23 ` Nick Desaulniers 2019-07-19 18:31 ` Josh Poimboeuf 0 siblings, 1 reply; 8+ messages in thread From: Nick Desaulniers @ 2019-07-19 18:23 UTC (permalink / raw) To: Arnd Bergmann Cc: clang-built-linux, Linux Kernel Mailing List, Josh Poimboeuf, Peter Zijlstra On Fri, Jul 19, 2019 at 11:10 AM Arnd Bergmann <arnd@arndb.de> wrote: > > A lot of objtool fixes showed up in linux-next, so I looked at some > remaining ones. > This one comes a lot up in some configurations > > https://godbolt.org/z/ZZLVD- > > struct ov7670_win_size { > int width; > int height; > }; > struct ov7670_devtype { > struct ov7670_win_size *win_sizes; > unsigned n_win_sizes; > }; > struct ov7670_info { > int min_width; > int min_height; > struct ov7670_devtype devtype; > } a; > int b; > int fn1() { > struct ov7670_info c = a; > int i = 0; > for (; i < c.devtype.n_win_sizes; i++) { > struct ov7670_win_size d = c.devtype.win_sizes[i]; > if (c.min_width && d.width < d.height < c.min_height) > if (b) > return 0; > } > return 2; > } > > $ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i > $ objtool check --no-unreachable --uaccess ov7670.o > ov7670.o: warning: objtool: fn1 uses BP as a scratch register Thanks for the report and reduced test case. From the godbolt link, I don't see %rbp, %ebp, %bp, or %bpl being referenced (other that %rbp in the typical epilogue). Am I missing something? Is objtool maybe not reporting the precise function at fault? -- Thanks, ~Nick Desaulniers ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:23 ` Nick Desaulniers @ 2019-07-19 18:31 ` Josh Poimboeuf 2019-07-19 18:44 ` Arnd Bergmann 0 siblings, 1 reply; 8+ messages in thread From: Josh Poimboeuf @ 2019-07-19 18:31 UTC (permalink / raw) To: Nick Desaulniers Cc: Arnd Bergmann, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra On Fri, Jul 19, 2019 at 11:23:16AM -0700, Nick Desaulniers wrote: > On Fri, Jul 19, 2019 at 11:10 AM Arnd Bergmann <arnd@arndb.de> wrote: > > > > A lot of objtool fixes showed up in linux-next, so I looked at some > > remaining ones. > > This one comes a lot up in some configurations > > > > https://godbolt.org/z/ZZLVD- > > > > struct ov7670_win_size { > > int width; > > int height; > > }; > > struct ov7670_devtype { > > struct ov7670_win_size *win_sizes; > > unsigned n_win_sizes; > > }; > > struct ov7670_info { > > int min_width; > > int min_height; > > struct ov7670_devtype devtype; > > } a; > > int b; > > int fn1() { > > struct ov7670_info c = a; > > int i = 0; > > for (; i < c.devtype.n_win_sizes; i++) { > > struct ov7670_win_size d = c.devtype.win_sizes[i]; > > if (c.min_width && d.width < d.height < c.min_height) > > if (b) > > return 0; > > } > > return 2; > > } > > > > $ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i > > $ objtool check --no-unreachable --uaccess ov7670.o > > ov7670.o: warning: objtool: fn1 uses BP as a scratch register > > Thanks for the report and reduced test case. From the godbolt link, I > don't see %rbp, %ebp, %bp, or %bpl being referenced (other that %rbp > in the typical epilogue). Am I missing something? Is objtool maybe > not reporting the precise function at fault? I haven't looked, but it could very well be an objtool bug (surprise). -- Josh ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:31 ` Josh Poimboeuf @ 2019-07-19 18:44 ` Arnd Bergmann 2019-07-19 18:48 ` Nick Desaulniers 2019-07-19 18:50 ` Nick Desaulniers 0 siblings, 2 replies; 8+ messages in thread From: Arnd Bergmann @ 2019-07-19 18:44 UTC (permalink / raw) To: Josh Poimboeuf Cc: Nick Desaulniers, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra On Fri, Jul 19, 2019 at 8:31 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > On Fri, Jul 19, 2019 at 11:23:16AM -0700, Nick Desaulniers wrote: > > On Fri, Jul 19, 2019 at 11:10 AM Arnd Bergmann <arnd@arndb.de> wrote: > > > > > > A lot of objtool fixes showed up in linux-next, so I looked at some > > > remaining ones. > > > This one comes a lot up in some configurations > > > > > > https://godbolt.org/z/ZZLVD- > > > > > > struct ov7670_win_size { > > > int width; > > > int height; > > > }; > > > struct ov7670_devtype { > > > struct ov7670_win_size *win_sizes; > > > unsigned n_win_sizes; > > > }; > > > struct ov7670_info { > > > int min_width; > > > int min_height; > > > struct ov7670_devtype devtype; > > > } a; > > > int b; > > > int fn1() { > > > struct ov7670_info c = a; > > > int i = 0; > > > for (; i < c.devtype.n_win_sizes; i++) { > > > struct ov7670_win_size d = c.devtype.win_sizes[i]; > > > if (c.min_width && d.width < d.height < c.min_height) > > > if (b) > > > return 0; > > > } > > > return 2; > > > } > > > > > > $ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i > > > $ objtool check --no-unreachable --uaccess ov7670.o > > > ov7670.o: warning: objtool: fn1 uses BP as a scratch register > > > > Thanks for the report and reduced test case. From the godbolt link, I > > don't see %rbp, %ebp, %bp, or %bpl being referenced (other that %rbp > > in the typical epilogue). Am I missing something? Is objtool maybe > > not reporting the precise function at fault? > > I haven't looked, but it could very well be an objtool bug (surprise). Actually the reproducer may be wrong. I reduced the test case using 9.0.0-svn363902-1~exp1+0~20190620001509.2315~1.gbp76e756, and this contains a link testl %ebp, %ebp I get the same thing with clang-8, but godbolt.org shows it only with clang-8 (see https://godbolt.org/z/g1lZO0) , not with trunk. Arnd ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:44 ` Arnd Bergmann @ 2019-07-19 18:48 ` Nick Desaulniers 2019-07-19 18:50 ` Nick Desaulniers 1 sibling, 0 replies; 8+ messages in thread From: Nick Desaulniers @ 2019-07-19 18:48 UTC (permalink / raw) To: Arnd Bergmann Cc: Josh Poimboeuf, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra, Craig Topper, Simon Pilgrim On Fri, Jul 19, 2019 at 11:44 AM Arnd Bergmann <arnd@arndb.de> wrote: > > On Fri, Jul 19, 2019 at 8:31 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > > > On Fri, Jul 19, 2019 at 11:23:16AM -0700, Nick Desaulniers wrote: > > > On Fri, Jul 19, 2019 at 11:10 AM Arnd Bergmann <arnd@arndb.de> wrote: > > > > > > > > A lot of objtool fixes showed up in linux-next, so I looked at some > > > > remaining ones. > > > > This one comes a lot up in some configurations > > > > > > > > https://godbolt.org/z/ZZLVD- > > > > > > > > struct ov7670_win_size { > > > > int width; > > > > int height; > > > > }; > > > > struct ov7670_devtype { > > > > struct ov7670_win_size *win_sizes; > > > > unsigned n_win_sizes; > > > > }; > > > > struct ov7670_info { > > > > int min_width; > > > > int min_height; > > > > struct ov7670_devtype devtype; > > > > } a; > > > > int b; > > > > int fn1() { > > > > struct ov7670_info c = a; > > > > int i = 0; > > > > for (; i < c.devtype.n_win_sizes; i++) { > > > > struct ov7670_win_size d = c.devtype.win_sizes[i]; > > > > if (c.min_width && d.width < d.height < c.min_height) > > > > if (b) > > > > return 0; > > > > } > > > > return 2; > > > > } > > > > > > > > $ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i > > > > $ objtool check --no-unreachable --uaccess ov7670.o > > > > ov7670.o: warning: objtool: fn1 uses BP as a scratch register > > > > > > Thanks for the report and reduced test case. From the godbolt link, I > > > don't see %rbp, %ebp, %bp, or %bpl being referenced (other that %rbp > > > in the typical epilogue). Am I missing something? Is objtool maybe > > > not reporting the precise function at fault? > > > > I haven't looked, but it could very well be an objtool bug (surprise). > > Actually the reproducer may be wrong. I reduced the test case using > 9.0.0-svn363902-1~exp1+0~20190620001509.2315~1.gbp76e756, > and this contains a link > > testl %ebp, %ebp > > I get the same thing with clang-8, but godbolt.org shows it only > with clang-8 (see https://godbolt.org/z/g1lZO0) , not with trunk. > > Arnd -- Thanks, ~Nick Desaulniers ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:44 ` Arnd Bergmann 2019-07-19 18:48 ` Nick Desaulniers @ 2019-07-19 18:50 ` Nick Desaulniers 2019-07-19 19:43 ` Arnd Bergmann 1 sibling, 1 reply; 8+ messages in thread From: Nick Desaulniers @ 2019-07-19 18:50 UTC (permalink / raw) To: Arnd Bergmann Cc: Josh Poimboeuf, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra, Craig Topper, Simon Pilgrim On Fri, Jul 19, 2019 at 11:44 AM Arnd Bergmann <arnd@arndb.de> wrote: > > On Fri, Jul 19, 2019 at 8:31 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > > > On Fri, Jul 19, 2019 at 11:23:16AM -0700, Nick Desaulniers wrote: > > > On Fri, Jul 19, 2019 at 11:10 AM Arnd Bergmann <arnd@arndb.de> wrote: > > > > > > > > A lot of objtool fixes showed up in linux-next, so I looked at some > > > > remaining ones. > > > > This one comes a lot up in some configurations > > > > > > > > https://godbolt.org/z/ZZLVD- > > > > > > > > struct ov7670_win_size { > > > > int width; > > > > int height; > > > > }; > > > > struct ov7670_devtype { > > > > struct ov7670_win_size *win_sizes; > > > > unsigned n_win_sizes; > > > > }; > > > > struct ov7670_info { > > > > int min_width; > > > > int min_height; > > > > struct ov7670_devtype devtype; > > > > } a; > > > > int b; > > > > int fn1() { > > > > struct ov7670_info c = a; > > > > int i = 0; > > > > for (; i < c.devtype.n_win_sizes; i++) { > > > > struct ov7670_win_size d = c.devtype.win_sizes[i]; > > > > if (c.min_width && d.width < d.height < c.min_height) > > > > if (b) > > > > return 0; > > > > } > > > > return 2; > > > > } > > > > > > > > $ clang-8 -O2 -fno-omit-frame-pointer -fno-strict-overflow -c ov7670.i > > > > $ objtool check --no-unreachable --uaccess ov7670.o > > > > ov7670.o: warning: objtool: fn1 uses BP as a scratch register > > > > > > Thanks for the report and reduced test case. From the godbolt link, I > > > don't see %rbp, %ebp, %bp, or %bpl being referenced (other that %rbp > > > in the typical epilogue). Am I missing something? Is objtool maybe > > > not reporting the precise function at fault? > > > > I haven't looked, but it could very well be an objtool bug (surprise). > > Actually the reproducer may be wrong. I reduced the test case using > 9.0.0-svn363902-1~exp1+0~20190620001509.2315~1.gbp76e756, > and this contains a link > > testl %ebp, %ebp > > I get the same thing with clang-8, but godbolt.org shows it only > with clang-8 (see https://godbolt.org/z/g1lZO0) , not with trunk. (Sorry for sending a blank email just now) + Craig and Simon, in case they recall this being a recent fix in LLVM's x86 backend. Sounds like this is fixing in upstream LLVM. Guessing this could result in improper unwinding w/ clang-8, but that's kind of irrelevant for x86 as there's no asm goto (though we don't need CONFIG_JUMP_LABEL in LTS branches :P) -- Thanks, ~Nick Desaulniers ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 18:50 ` Nick Desaulniers @ 2019-07-19 19:43 ` Arnd Bergmann 2019-07-22 19:46 ` Topper, Craig 0 siblings, 1 reply; 8+ messages in thread From: Arnd Bergmann @ 2019-07-19 19:43 UTC (permalink / raw) To: Nick Desaulniers Cc: Josh Poimboeuf, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra, Craig Topper, Simon Pilgrim [-- Attachment #1: Type: text/plain, Size: 4711 bytes --] On Fri, Jul 19, 2019 at 8:50 PM 'Nick Desaulniers' via Clang Built Linux <clang-built-linux@googlegroups.com> wrote: > On Fri, Jul 19, 2019 at 11:44 AM Arnd Bergmann <arnd@arndb.de> wrote: > > On Fri, Jul 19, 2019 at 8:31 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > Actually the reproducer may be wrong. I reduced the test case using > > 9.0.0-svn363902-1~exp1+0~20190620001509.2315~1.gbp76e756, > > and this contains a link > > > > testl %ebp, %ebp > > > > I get the same thing with clang-8, but godbolt.org shows it only > > with clang-8 (see https://godbolt.org/z/g1lZO0) , not with trunk. > > (Sorry for sending a blank email just now) > + Craig and Simon, in case they recall this being a recent fix in > LLVM's x86 backend. > Sounds like this is fixing in upstream LLVM. Guessing this could > result in improper unwinding w/ clang-8, but that's kind of irrelevant > for x86 as there's no asm goto (though we don't need CONFIG_JUMP_LABEL > in LTS branches :P) Maybe you can try the attached .config file with a more recent clang build. This showed a few hundred warnings like this one for me, so if it was not a bugfix but a random change in clang-9 that changed my reproducer. Ignoring the 'uses BP as a scratch' warnings and the reiserfs 'unreachable instruction' ones, this is what else I got with today's linux-next: arch/x86/events/intel/core.o: warning: objtool: intel_pmu_nhm_workaround()+0x103: unreachable instruction arch/x86/ia32/ia32_signal.o: warning: objtool: ia32_setup_rt_frame()+0x151: call to memset() with UACCESS enabled arch/x86/kernel/cpu/mtrr/generic.o: warning: objtool: get_fixed_ranges()+0x144: unreachable instruction arch/x86/kernel/process.o: warning: objtool: get_tsc_mode()+0x20: call without frame pointer save/setup arch/x86/kernel/signal.o: warning: objtool: __setup_rt_frame()+0x1a0: call to memset() with UACCESS enabled arch/x86/kernel/signal.o: warning: objtool: x32_setup_rt_frame()+0x1da: call to memset() with UACCESS enabled arch/x86/kernel/tsc.o: warning: objtool: sched_clock()+0x0: call without frame pointer save/setup arch/x86/mm/fault.o: warning: objtool: do_user_addr_fault()+0x53: unreachable instruction drivers/ata/sata_dwc_460ex.o: warning: objtool: sata_dwc_bmdma_start_by_tag()+0x259: can't find switch jump table drivers/gpu/drm/amd/amdgpu/atom.o: warning: objtool: atom_op_move() falls through to next function atom_op_and() drivers/gpu/drm/radeon/atom.o: warning: objtool: atom_op_move()+0xce: sibling call from callable instruction with modified stack frame drivers/gpu/drm/radeon/atom.o: warning: objtool: atom_op_move() falls through to next function atom_op_and() modified stack frame drivers/gpu/drm/radeon/evergreen_cs.o: warning: objtool: evergreen_cs_parse()+0xbcf: sibling call from callable instruction with modified stack frame drivers/gpu/drm/radeon/evergreen_cs.o: warning: objtool: evergreen_cs_parse() falls through to next function evergreen_dma_cs_parse() drivers/hwmon/pmbus/adm1275.o: warning: objtool: adm1275_probe()+0x949: unreachable instruction drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt2.o: warning: objtool: x_tune_dvbt2_demod_setting()+0x92a: can't find switch jump table drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_set()+0x93: sibling call from callable instruction with modified stack frame drivers/platform/x86/intel_speed_select_if/isst_if_common.o: warning: objtool: isst_restore_msr_local()+0x13d: unreachable instruction drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.o: warning: objtool: isst_if_send_mbox_cmd()+0x80: unreachable instruction fs/hfsplus/xattr.o: warning: objtool: hfsplus_create_attributes_file()+0x4f7: unreachable instruction kernel/trace/ring_buffer.o: warning: objtool: ring_buffer_nest_end()+0x1b: call without frame pointer save/setup kernel/trace/trace.o: warning: objtool: saved_cmdlines_stop()+0x13: call without frame pointer save/setup lib/iov_iter.o: warning: objtool: .altinstr_replacement+0x30: call without frame pointer save/setup lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch()+0x25: call to memcpy() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1()+0xbd: call to __stack_chk_fail() with UACCESS enabled lib/ubsan.o: warning: objtool: ubsan_type_mismatch_common()+0x448: call to __stack_chk_fail() with UACCESS enabled mm/kasan/common.o: warning: objtool: kasan_report()+0x43: call to __stack_chk_fail() with UACCESS enabled mm/page_alloc.o: warning: objtool: .altinstr_replacement+0x47: call without frame pointer save/setup mm/workingset.o: warning: objtool: count_shadow_nodes()+0x126: unreachable instruction Any interesting ones in there? Arnd [-- Attachment #2: config-0x94187A56.gz --] [-- Type: application/gzip, Size: 35351 bytes --] ^ permalink raw reply [flat|nested] 8+ messages in thread
* RE: warning: objtool: fn1 uses BP as a scratch register 2019-07-19 19:43 ` Arnd Bergmann @ 2019-07-22 19:46 ` Topper, Craig 0 siblings, 0 replies; 8+ messages in thread From: Topper, Craig @ 2019-07-22 19:46 UTC (permalink / raw) To: Arnd Bergmann, Nick Desaulniers Cc: Josh Poimboeuf, clang-built-linux, Linux Kernel Mailing List, Peter Zijlstra, Simon Pilgrim The framepointer thing may have been fixed by this https://reviews.llvm.org/D64294 -----Original Message----- From: Arnd Bergmann <arnd@arndb.de> Sent: Friday, July 19, 2019 12:44 PM To: Nick Desaulniers <ndesaulniers@google.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com>; clang-built-linux <clang-built-linux@googlegroups.com>; Linux Kernel Mailing List <linux-kernel@vger.kernel.org>; Peter Zijlstra <peterz@infradead.org>; Topper, Craig <craig.topper@intel.com>; Simon Pilgrim <llvm-dev@redking.me.uk> Subject: Re: warning: objtool: fn1 uses BP as a scratch register On Fri, Jul 19, 2019 at 8:50 PM 'Nick Desaulniers' via Clang Built Linux <clang-built-linux@googlegroups.com> wrote: > On Fri, Jul 19, 2019 at 11:44 AM Arnd Bergmann <arnd@arndb.de> wrote: > > On Fri, Jul 19, 2019 at 8:31 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > Actually the reproducer may be wrong. I reduced the test case using > > 9.0.0-svn363902-1~exp1+0~20190620001509.2315~1.gbp76e756, > > and this contains a link > > > > testl %ebp, %ebp > > > > I get the same thing with clang-8, but godbolt.org shows it only > > with clang-8 (see https://godbolt.org/z/g1lZO0) , not with trunk. > > (Sorry for sending a blank email just now) > + Craig and Simon, in case they recall this being a recent fix in > LLVM's x86 backend. > Sounds like this is fixing in upstream LLVM. Guessing this could > result in improper unwinding w/ clang-8, but that's kind of irrelevant > for x86 as there's no asm goto (though we don't need CONFIG_JUMP_LABEL > in LTS branches :P) Maybe you can try the attached .config file with a more recent clang build. This showed a few hundred warnings like this one for me, so if it was not a bugfix but a random change in clang-9 that changed my reproducer. Ignoring the 'uses BP as a scratch' warnings and the reiserfs 'unreachable instruction' ones, this is what else I got with today's linux-next: arch/x86/events/intel/core.o: warning: objtool: intel_pmu_nhm_workaround()+0x103: unreachable instruction arch/x86/ia32/ia32_signal.o: warning: objtool: ia32_setup_rt_frame()+0x151: call to memset() with UACCESS enabled arch/x86/kernel/cpu/mtrr/generic.o: warning: objtool: get_fixed_ranges()+0x144: unreachable instruction arch/x86/kernel/process.o: warning: objtool: get_tsc_mode()+0x20: call without frame pointer save/setup arch/x86/kernel/signal.o: warning: objtool: __setup_rt_frame()+0x1a0: call to memset() with UACCESS enabled arch/x86/kernel/signal.o: warning: objtool: x32_setup_rt_frame()+0x1da: call to memset() with UACCESS enabled arch/x86/kernel/tsc.o: warning: objtool: sched_clock()+0x0: call without frame pointer save/setup arch/x86/mm/fault.o: warning: objtool: do_user_addr_fault()+0x53: unreachable instruction drivers/ata/sata_dwc_460ex.o: warning: objtool: sata_dwc_bmdma_start_by_tag()+0x259: can't find switch jump table drivers/gpu/drm/amd/amdgpu/atom.o: warning: objtool: atom_op_move() falls through to next function atom_op_and() drivers/gpu/drm/radeon/atom.o: warning: objtool: atom_op_move()+0xce: sibling call from callable instruction with modified stack frame drivers/gpu/drm/radeon/atom.o: warning: objtool: atom_op_move() falls through to next function atom_op_and() modified stack frame drivers/gpu/drm/radeon/evergreen_cs.o: warning: objtool: evergreen_cs_parse()+0xbcf: sibling call from callable instruction with modified stack frame drivers/gpu/drm/radeon/evergreen_cs.o: warning: objtool: evergreen_cs_parse() falls through to next function evergreen_dma_cs_parse() drivers/hwmon/pmbus/adm1275.o: warning: objtool: adm1275_probe()+0x949: unreachable instruction drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt2.o: warning: objtool: x_tune_dvbt2_demod_setting()+0x92a: can't find switch jump table drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_set()+0x93: sibling call from callable instruction with modified stack frame drivers/platform/x86/intel_speed_select_if/isst_if_common.o: warning: objtool: isst_restore_msr_local()+0x13d: unreachable instruction drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.o: warning: objtool: isst_if_send_mbox_cmd()+0x80: unreachable instruction fs/hfsplus/xattr.o: warning: objtool: hfsplus_create_attributes_file()+0x4f7: unreachable instruction kernel/trace/ring_buffer.o: warning: objtool: ring_buffer_nest_end()+0x1b: call without frame pointer save/setup kernel/trace/trace.o: warning: objtool: saved_cmdlines_stop()+0x13: call without frame pointer save/setup lib/iov_iter.o: warning: objtool: .altinstr_replacement+0x30: call without frame pointer save/setup lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch()+0x25: call to memcpy() with UACCESS enabled lib/ubsan.o: warning: objtool: __ubsan_handle_type_mismatch_v1()+0xbd: call to __stack_chk_fail() with UACCESS enabled lib/ubsan.o: warning: objtool: ubsan_type_mismatch_common()+0x448: call to __stack_chk_fail() with UACCESS enabled mm/kasan/common.o: warning: objtool: kasan_report()+0x43: call to __stack_chk_fail() with UACCESS enabled mm/page_alloc.o: warning: objtool: .altinstr_replacement+0x47: call without frame pointer save/setup mm/workingset.o: warning: objtool: count_shadow_nodes()+0x126: unreachable instruction Any interesting ones in there? Arnd ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-07-22 19:46 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2019-07-19 18:09 warning: objtool: fn1 uses BP as a scratch register Arnd Bergmann 2019-07-19 18:23 ` Nick Desaulniers 2019-07-19 18:31 ` Josh Poimboeuf 2019-07-19 18:44 ` Arnd Bergmann 2019-07-19 18:48 ` Nick Desaulniers 2019-07-19 18:50 ` Nick Desaulniers 2019-07-19 19:43 ` Arnd Bergmann 2019-07-22 19:46 ` Topper, Craig
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