Π― ΠΏΡΡΠ°ΡΡΡ ΡΠΎΠ±ΡΠ°ΡΡ ΠΊΠΎΠΌΠΌΠΈΡ c7874f805c63c60285f2b190f6589da8ae5e47fa
Π ΡΡΠΎ Π½Π΅ ΡΠ΄Π°Π»ΠΎΡΡ Ρ ΡΡΠΎΠΉ ΠΎΡΠΈΠ±ΠΊΠΎΠΉ:
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c: In function 'main':
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:34:9: error: 'cpuid.revision' may be used uninitialized in this func
tion [-Werror=maybe-uninitialized]
34 | printf("cpuid:part = %#x, rev = %#x\n", cpuid.part, cpuid.revision);
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:31:27: note: 'cpuid.revision' was declared here
31 | cortex_m3_cpuid_t cpuid;
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:34:9: error: 'cpuid.part' may be used uninitialized in this function [-Werror=maybe-uninitialized]
34 | printf("cpuid:part = %#x, rev = %#x\n", cpuid.part, cpuid.revision);
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:31:27: note: 'cpuid.part' was declared here
31 | cortex_m3_cpuid_t cpuid;
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:33:9: error: 'cpuid.variant' may be used uninitialized in this function [-Werror=maybe-uninitialized]
33 | printf("cpuid:impl_id = %0#x, variant = %#x\n", cpuid.implementer_id, cpuid.variant);
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:31:27: note: 'cpuid.variant' was declared here
31 | cortex_m3_cpuid_t cpuid;
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:33:9: error: 'cpuid.implementer_id' may be used uninitialized in this function [-Werror=maybe-uninitialized]
33 | printf("cpuid:impl_id = %0#x, variant = %#x\n", cpuid.implementer_id, cpuid.variant);
| ^
/builddir/build/BUILD/stlink-org-stlink-c7874f8/tests/usb.c:31:27: note: 'cpuid.implementer_id' was declared here
31 | cortex_m3_cpuid_t cpuid;
| ^
lto1: all warnings being treated as errors
ΠΠ°ΠΊ ΡΡΠΎ ΠΈΡΠΏΡΠ°Π²ΠΈΡΡ?
Π macOS ΠΊΠΎΠ΄ ΠΊΠΎΠΌΠΏΠΈΠ»ΠΈΡΡΠ΅ΡΡΡ Ρ ΠΎΡΠΎΡΠΎ.
Π src/common.c
int stlink_cpu_id(stlink_t *sl, cortex_m3_cpuid_t *cpuid) {
uint32_t raw;
if (stlink_read_debug32(sl, STLINK_REG_CM3_CPUID, &raw))
return -1;
cpuid->implementer_id = (raw >> 24) & 0x7f;
cpuid->variant = (raw >> 20) & 0xf;
cpuid->part = (raw >> 4) & 0xfff;
cpuid->revision = raw & 0xf;
return 0;
}
ΠΠΎΡ ΠΎΠΆΠ΅, Π·Π΄Π΅ΡΡ Π΄Π΅ΠΉΡΡΠ²ΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΈΠ½ΠΈΡΠΈΠ°Π»ΠΈΠ·ΠΈΡΡΡΡΡΡ cpuid.part ΠΈ cpuid.revision. ΠΠΎΠΆΠ΅Ρ Π±ΡΡΡ, ΠΊΠΎΠΌΠΏΠΈΠ»ΡΡΠΎΡ ΠΏΠ»ΠΎΡ ΠΎ ΡΠ΅Π±Ρ Π²Π΅Π΄Π΅Ρ?
if (stlink_read_debug32(sl, STLINK_REG_CM3_CPUID, &raw))
return -1;
Π ΡΡΠΎΠΌ ΡΠ»ΡΡΠ°Π΅ cpuid. * ΠΡΡΠ°Π½Π΅ΡΡΡ Π½Π΅ΠΈΠ½ΠΈΡΠΈΠ°Π»ΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌ.
ΠΠ° Ubuntu ΡΠΎΠΆΠ΅ ΡΡΠΏΠ΅ΡΠ½ΠΎ ΡΠΊΠΎΠΌΠΏΠΈΠ»ΠΈΡΠΎΠ²Π°Π½. ΠΠ΅ΡΠ΅ΠΌΠ΅Π½Π½Π°Ρ cpuid ΠΌΠΎΠΆΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡΡΡ Π² ΡΠ»ΡΡΠ°Π΅ ΠΎΡΠΈΠ±ΠΊΠΈ ΡΡΠ΅Π½ΠΈΡ ΡΠ΅Π³ΠΈΡΡΡΠ°.
--- Π° / ΡΠ΅ΡΡΡ / usb.c
+++ Π± / ΡΠ΅ΡΡΡ / usb.c
@@ -29,7 +29,11 @@ int main (int ac, char ** av) {
printf ("- core_id:% # x \ n", sl-> core_id);cortex_m3_cpuid_t cpuid;
- stlink_cpu_id (sl, & cpuid);
+ Π΅ΡΠ»ΠΈ (stlink_cpu_id (sl, & cpuid))
+ {
+ printf ("Π½Π΅ΠΈΠ·Π²Π΅ΡΡΠ½ΡΠΉ ΡΠΈΠΏ \ n");
+ memset (& cpuid, 0, sizeof (cortex_m3_cpuid_t))
+}
printf ("cpuid: impl_id =% 0 # x, variant =% # x \ n", cpuid.implementer_id, cpuid.variant);
printf ("cpuid: part =% # x, rev =% # x \ n", cpuid.part, cpuid.revision);
Π― Π΄ΡΠΌΠ°Ρ, ΡΡΠΎ ΠΌΠΎΠΆΠ½ΠΎ ΠΈΡΠΏΡΠ°Π²ΠΈΡΡ, Π΄ΠΎΠ±Π°Π²ΠΈΠ² ΠΏΡΠΎΠ²Π΅ΡΠΊΡ Π²ΠΎΠ·Π²ΡΠ°ΡΠ°Π΅ΠΌΠΎΠ³ΠΎ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π½Π° stlink_cpu_id ΠΈ ΠΈΠ½ΠΈΡΠΈΠ°Π»ΠΈΠ·ΠΈΡΡΡ ΡΡΠΈ Π·Π½Π°ΡΠ΅Π½ΠΈΡ Π΄ΠΎ Π½ΡΠ»Ρ. Π― Π΄Π°ΠΌ Π΅ΠΌΡ ΠΏΠΎΠΏΡΠΎΠ±ΠΎΠ²Π°ΡΡ.
Π£ ΠΌΠ΅Π½Ρ -Werror=maybe-uninitialized
ΠΏΠΎΡΠΎΠΌΡ ΡΡΠΎ Π²ΠΎ Π²ΡΠ΅ΠΌΡ Π½Π°ΡΡΡΠΎΠΉΠΊΠΈ:
-- Performing Test C_SUPPORTS_WMAYBE_UNINITIALIZED
-- Performing Test C_SUPPORTS_WMAYBE_UNINITIALIZED - Success
@Vascom ΠΠΎΠΆΠ΅ΡΠ΅ Π»ΠΈ Π²Ρ ΠΏΡΠΎΡΠ΅ΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΌΠΎΡ Π²Π΅ΡΠΊΡ https://github.com/chenguokai/stlink/tree/issue937 ?
ΠΡΠ»ΠΈ ΠΏΠΎΠ»ΡΡΠΈΡΡΡ, ΠΏΠΎΠ΄Π½ΠΈΠΌΡ ΠΏΠΈΠ°Ρ.
@Vascom ΠΠΎΠΆΠ΅ΡΠ΅ Π»ΠΈ Π²Ρ ΠΏΡΠΎΡΠ΅ΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΌΠΎΡ Π²Π΅ΡΠΊΡ https://github.com/chenguokai/stlink/tree/issue937 ?
ΠΡΠ»ΠΈ ΠΏΠΎΠ»ΡΡΠΈΡΡΡ, ΠΏΠΎΠ΄Π½ΠΈΠΌΡ ΠΏΠΈΠ°Ρ.
ΠΠ°, ΡΡΠΎ ΡΠ°Π±ΠΎΡΠ°Π΅Ρ.