kernel/drivers/firmware/efi/libstub/vsprintf.c, branch linux-6.18.y

isystem: ship and use stdarg.h

2021-08-19T00:02:55Z

Ship minimal stdarg.h (1 type, 4 macros) as . stdarg.h is the only userspace header commonly used in the kernel. GPL 2 version of can be extracted from http://archive.debian.org/debian/pool/main/g/gcc-4.2/gcc-4.2_4.2.4.orig.tar.gz Signed-off-by: Alexey Dobriyan Acked-by: Rafael J. Wysocki Acked-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada

efi/printf: remove unneeded semicolon

2020-09-16T15:53:42Z

Fix the warning below. efi/libstub/vsprintf.c:135:2-3: Unneeded semicolon Signed-off-by: Tian Tao Acked-by: Arvind Sankar Link: https://lore.kernel.org/r/1599633872-36784-1-git-send-email-tiantao6@hisilicon.com Signed-off-by: Ard Biesheuvel

efi/printf: Add support for wchar_t (UTF-16)

2020-05-20T17:09:20Z

Support %lc and %ls to output UTF-16 strings (converted to UTF-8). Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-21-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Turn vsprintf into vsnprintf

2020-05-19T08:32:04Z

Implement vsnprintf instead of vsprintf to avoid the possibility of a buffer overflow. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-17-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Abort on invalid format

2020-05-19T08:32:04Z

If we get an invalid conversion specifier, bail out instead of trying to fix it up. The format string likely has a typo or assumed we support something that we don't, in either case the remaining arguments won't match up with the remaining format string. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-16-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Refactor code to consolidate padding and output

2020-05-19T08:32:03Z

Consolidate the actual output of the formatted text into one place. Fix a couple of edge cases: 1. If 0 is printed with a precision of 0, the printf specification says that nothing should be output, with one exception (2b). 2. The specification for octal alternate format (%#o) adds the leading zero not as a prefix as the 0x for hexadecimal is, but by increasing the precision if necessary to add the zero. This means that a. %#.2o turns 8 into "010", but 1 into "01" rather than "001". b. %#.o prints 0 as "0" rather than "", unlike the situation for decimal, hexadecimal and regular octal format, which all output an empty string. Reduce the space allocated for printing a number to the maximum actually required (22 bytes for a 64-bit number in octal), instead of the 66 bytes previously allocated. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-15-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Handle null string input

2020-05-19T08:31:50Z

Print "(null)" for 's' if the input is a NULL pointer. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-14-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Factor out integer argument retrieval

2020-05-19T08:31:50Z

Factor out the code to get the correct type of numeric argument into a helper function. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-13-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Factor out width/precision parsing

2020-05-19T08:31:48Z

Factor out the width/precision parsing into a helper function. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-12-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel

efi/printf: Merge 'p' with the integer formats

2020-05-19T08:31:25Z

Treat 'p' as a hexadecimal integer with precision equal to the number of digits in void *. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20200518190716.751506-11-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel