Bananymous
ca9361abc1
DynamicLoader: Add support for dladdr
2025-08-19 16:23:30 +03:00
Bananymous
45ad6082bc
DynamicLoader: Support dlopen(NULL, ...)
2025-08-05 03:09:24 +03:00
Bananymous
82b351469b
DynamicLoader: Setup thread id when initializing TLS
...
This allows pre-libc code use pthread functions
(__cxa_guard_release calls pthread_cond_broadcast)
2025-08-05 03:09:24 +03:00
Bananymous
7831c74e8c
DynamicLoader: Add support for LD_LIBRARY_PATH
...
Also fix a bug with dlopen with TLS
2025-07-31 22:47:29 +03:00
Bananymous
521457eb92
DynamicLoader: Add support for calling destructors
...
After all libraries are initialized, their destructors are registered
using atexit
2025-06-28 16:55:13 +03:00
Bananymous
397219c22e
LibC: Implement very hacky dlopen/dlsym/dclose
...
If ELF loading fails, this will just crash the program :D
And there is no support for RTLD_LOCAL
2025-06-28 16:55:13 +03:00
Bananymous
4a00cb7d55
DynamicLoader: Add few more TLS relocations
2025-06-16 15:06:48 +03:00
Bananymous
5ad7d7edb1
DynamicLoader: Fix TLS on 32 bit platform
...
There were two problems with my previous implementation
- TLS was not allocated if nothing used it. There is a fallback
initialization in _init_libc, but this was not enough if one of the
init functions tried to access errno.
- __tls_get_addr was not resolved. If __tls_get_addr was called through
a plt entry, everything would just break :(
2025-06-06 16:27:07 +03:00
Bananymous
1c882ea361
DynamicLoader: Don't print TODOs on PT_GNU_ headers
...
These should be either handled by kernel or just used as optimizations.
There is no requirement to handle them in dynamic loader
2025-06-01 13:48:03 +03:00
Bananymous
2cbfe70a28
DynamicLoader: Don't leak fds
2025-04-20 18:18:32 +03:00
Bananymous
ac90800c3c
Kernel/LibC/DynamicLoader: Implement thread local storage
...
For some reason this does not work on 32 bit version, so it is disabled
on that platform. I'll have to look into it later to find the bug :)
2025-04-15 23:33:39 +03:00
Bananymous
254fd80088
DynamicLoader: Cleanup and prepare for TLS
2025-04-15 23:31:17 +03:00
Bananymous
36baf7b0af
Kernel/LibC/DynamicLoader: Update process start ABI
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We now use SysV abi for process startup
2025-04-15 23:05:52 +03:00
Bananymous
e6026cb0b8
DynamicLoader: Handle circular dependencies
2025-04-15 23:05:52 +03:00
Bananymous
4f49d60e4a
DynamicLoader/LibC: lazy malloc environ
...
This allows DynamicLoader to just set the value of global environ symbol
without libc needing to malloc it at startup
2025-04-15 23:05:52 +03:00
Bananymous
c6cd185cb5
DynamicLoader: Fix copy relocations
...
Weak symbols are now actually resolved to the same strong symbol between
shared objects and copy relocations now work!
2025-01-24 19:23:33 +02:00
Bananymous
3a465cb94f
DynamicLoader: Don't write to pltgot if it does not exist
...
This makes `tcc` compile runnable executables
2024-12-04 21:11:43 +02:00
Bananymous
415b20f884
LibC: Remove errno EEXISTS
...
I don't know why I had added this. It doesn't seem to be a thing on
either POSIX or linux. This was literally equivalent to EXIST
2024-12-02 20:13:38 +02:00
Bananymous
708a720d9d
Kernel: Remove SYS_OPEN
...
This can be done with SYS_OPENAT with fd set to AT_FDCWD
2024-09-17 16:16:47 +03:00
Bananymous
4006a04817
DynamicLoader: Don't do file backed mapping over file bounds
2024-09-11 19:30:35 +03:00
Bananymous
19d16620a6
DynamicLoader: Don't do file backed mapping for filesz == 0
2024-09-05 14:50:05 +03:00
Bananymous
e8bcebfb8e
DynamicLoader: Use file backed mmap when possible
2024-09-05 13:59:39 +03:00
Bananymous
aa7e92b275
Userspace: Write a dynamic loader
...
This allows running executing dynamically linked executables!
2024-09-05 12:58:21 +03:00
Bananymous