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Diffstat (limited to 'libc/README')
| -rw-r--r-- | libc/README | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/libc/README b/libc/README deleted file mode 100644 index 4e29f12..0000000 --- a/libc/README +++ /dev/null @@ -1,53 +0,0 @@ -Welcome to Bionic, Android small and custom C library for the Android platform - -Bionic is mainly a port of the BSD C library to our Linux kernel with the -following additions/changes: - -- no support for locales -- no support for wide chars (i.e. multi-byte characters) -- its own smallish implementation of pthreads based on Linux futexes -- support for x86, ARM and ARM thumb CPU instruction sets and kernel interfaces - -Bionic is released under the standard 3-clause BSD License - -Bionic doesn't want to implement all features of a traditional C library, we only -add features to it as we need them, and we try to keep things as simple and small -as possible. Our goal is not to support scaling to thousands of concurrent threads -on multi-processors machines; we're running this on cell-phones, damnit !! - -Note that Bionic doesn't provide a libthread_db or a libm implementation. - - -Adding new syscalls: -==================== - -Bionic provides the gensyscalls.py Python script to automatically generate syscall -stubs from the list defined in the file SYSCALLS.TXT. You can thus add a new syscall -by doing the following: - -- edit SYSCALLS.TXT -- add a new line describing your syscall, it should look like: - - return_type syscall_name(parameters) syscall_number - -- in the event where you want to differentiate the syscall function from its entry name, - use the alternate: - - return_type funcname:syscall_name(parameters) syscall_number - -- additionally, if the syscall number is different between ARM and x86, use: - - return_type funcname[:syscall_name](parameters) arm_number,x86_number - -- a syscall number can be -1 to indicate that the syscall is not implemented on - a given platform, for example: - - void __set_tls(void*) arm_number,-1 - - -the comments in SYSCALLS.TXT contain more information about the line format - -You can also use the 'checksyscalls.py' script to check that all the syscall -numbers you entered are correct. It does so by looking at the values defined in -your Linux kernel headers. The script indicates where the values are incorrect -and what is expected instead. |