grovel/tools, branch main

Fix the build system.

2024-01-05T08:43:22Z

The improvements are: - use most of the default "Makefile" for standard packaging; - also use the default ".gitignore" with for the derived assets; - don't impose so many $CFLAGS on the user. GCC still needs to be given the `-ffreestanding` flag explicitly for us to get a good binary; - stop using ad-hoc tools/* scripts, and avoid the code-generation anti-pattern overall on the build. Some of the generated files were checked-in, and some were removed; - remove empty files; - use POSIX make(1) over gmake; - add fuzz targets; - partial "install" and "uninstall" targets; - complete "clean" target. The shortcomings are: - only working on x86_64. More platforms coming soon; - code is still messy: way too many warnings, GNU/BSD specific extensions, inline assembly, and all kinds of unportable code; - still only works with GCC and GCC-like compilers, and completly fails with tcc(1) and cproc(1); - the `deps.mk` file is being maintained manually. As I work on the source files I'll finish automating its generation with `mkdeps.sh`; - still seems to be coupled with Linux; - still is missing tests setup; - still uses `#include <$NAME.h>` instead of the correct `#include "$NAME.h"` form. The generated libgrovel.a did match the previous lib/libc.a 100%.

tools/: Remove unused files

2024-01-02T20:27:38Z

fix incorrect escaping in add-cfi.*.awk scripts

2020-01-20T20:57:29Z

gawk 5 complains.

fix musl-gcc wrapper to be compatible with default-pie gcc toolchains

2018-08-02T23:15:48Z

the specfile for the wrapper was written assuming output is pie only if -pie appears on the command line. recent (and older patched) versions of gcc can be configured to produce pie output by default, adn when used with such a toolchain, the wrapper linked the wrong startfiles (crt*) containing pic-incompatible code. rather than trying to figure out gcc's default, simply always use the pic-compatible start files.

add CFI generation script for x86_64

2015-10-13T22:09:46Z

recognize partial register operands in i386 CFI generation

2015-10-13T22:02:36Z

fix misinterpretation of indexed memory operand in i386 CFI generation

2015-10-13T21:58:43Z

a register used as an index in the memory destination of a mov instruction was wrongly interpreted as the destination of the mov.

fix misinterpretation of operand order in i386 CFI generation

2015-10-13T21:21:05Z

binary ops like ADD, AND, etc. modify the 2nd operand, not 1st.

fix instruction matching errors in i386 CFI generation

2015-10-08T21:04:41Z

fdiv and fmul instructions were wrongly matched by the rules for integer div and mul instructions, leading to incorrect conclusions about register values being clobbered.

factor common awk functions for CFI generation scripts into new file

2015-10-08T21:03:10Z

There is a lot which could be common between i386 and x86_64, but none of it will be useful for any other arch. These should be useful for all archs, however.