We were checking for anonymous mappings earlier on Windows by seeing if
the file descriptor argument to mmap() was supplied as -1. This was not
correct. The proper thing to do is check `flags & MAP_ANONYMOUS`.
The C standard states, for conversions using the d, i, b, B, o, u, x or X conversion specifiers:
> The precision specifies the minimum number of digits to appear; if
> the value being converted can be represented in fewer digits, it is
> expanded with leading zeros.
- C standard, 7.23.6.1. The fprintf function
However, cosmopolitan currently suppresses the addition of leading
zeros when the minus flag is set. This is not reflected by anything
within the C standard, meaning that behavior is incorrect.
This patch fixes this.
* Implement S conversion specifier for printf-related functions
POSIX specifies that a conversion specifier of S must be interpreted
the same way as %ls. This patch implements this.
* clang-format
---------
Co-authored-by: Gavin Hayes <gavin@computoid.com>
Python triggered the undefined behavior previously since it appears to
be posting to a semaphore owned by a different process that wasn't set
to process shared mode. The performance loss to process shared futexes
is so low and semaphores are generally used for this purpose, so it'll
be much simpler to simply not impose undefined behavior here.
This fixes a bug where the caller's timeval will be clobbered on Linux.
The Kernel ABI *always* modifies the timeout argument but POSIX says it
should be a const parameter. The wrapper now handles the difference and
sys_select() may be used if obtaining the remainder on Linux is needed.
The system call wrapper was wrongfully reinterpreting kernel data. The
examples/sysinfo.c program is now updated to show how to correctly use
what's returned.
libc/sock/if.h is removed because:
- it contained only IFNAMSIZ, which was also defined in
libc/sock/struct/ifreq.h
- it was not included in any file EXCEPT libc/isystem/net/if.h, which
also included the libc/sock/struct/ifreq.h
hence we remove this file, and move the IFNAMSIZ definition to
libc/sock/struct/ifreq.h which is included in isystem.
IFNAMSIZ is defined in:
- libc/sock/if.h
- libc/sock/struct/ifreq.h
we add a check in the latter to avoid a complaint when using the
amalgamated header.
* [metal] Copy program pages to extended memory at startup
* [metal] Reclaim base memory pages for later app use
* [metal] Load program pages beyond 1st 440 KiB to extended memory
o//examples/hellolua.com now runs correctly under QEMU (in
legacy BIOS mode).
* [metal] Place GDT in read/write segment
The CPU absolutely needs to alter the GDT when loading the
task register (via ltr). To account for this, I move the
GDT into a read/write data section. There is still a "rump"
read-only GDT in the text section that is used by the real
mode bootloader.
We also delay the loading of the task register (ltr) until
after the IDT and TSS are finally set up.
* [metal] Get examples/vga2.c serial output working for UEFI boot
* [metal] Get examples/vga2.c VGA output working for UEFI boot
* [metal] Allow munmap() to reclaim dynamically allocated pages
* Place TLS sections right after .text, not after embedded zip file
Co-authored-by: tkchia <tkchia-cosmo@gmx.com>
