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Diffstat (limited to 'Documentation/core-api/printk-formats.rst')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index a7fae4538946..75d2bbe9813f 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -13,6 +13,10 @@ Integer types If variable is of Type, use printk format specifier: ------------------------------------------------------------ + char %hhd or %hhx + unsigned char %hhu or %hhx + short int %hd or %hx + unsigned short int %hu or %hx int %d or %x unsigned int %u or %x long %ld or %lx @@ -21,6 +25,10 @@ Integer types unsigned long long %llu or %llx size_t %zu or %zx ssize_t %zd or %zx + s8 %hhd or %hhx + u8 %hhu or %hhx + s16 %hd or %hx + u16 %hu or %hx s32 %d or %x u32 %u or %x s64 %lld or %llx @@ -50,6 +58,14 @@ A raw pointer value may be printed with %p which will hash the address before printing. The kernel also supports extended specifiers for printing pointers of different types. +Some of the extended specifiers print the data on the given address instead +of printing the address itself. In this case, the following error messages +might be printed instead of the unreachable information:: + + (null) data on plain NULL address + (efault) data on invalid address + (einval) invalid data on a valid address + Plain Pointers -------------- |