diff options
Diffstat (limited to 'open_issues')
| -rw-r--r-- | open_issues/anatomy_of_a_hurd_system.mdwn | 65 |
1 files changed, 40 insertions, 25 deletions
diff --git a/open_issues/anatomy_of_a_hurd_system.mdwn b/open_issues/anatomy_of_a_hurd_system.mdwn index 7429abce..966331ce 100644 --- a/open_issues/anatomy_of_a_hurd_system.mdwn +++ b/open_issues/anatomy_of_a_hurd_system.mdwn @@ -17,37 +17,52 @@ like Bushnell's Hurd paper. All this should be unfied and streamlined. [[!toc]] -# IRC, freenode, #hurd, 2011-03-08 - - <foocraft> I've a question on what are the "units" in the hurd project, if - you were to divide them into units if they aren't, and what are the - dependency relations between those units(roughly, nothing too pedantic - for now) - <antrik> there is GNU Mach (the microkernel); there are the server - libraries in the Hurd package; there are the actual servers in the same; - and there is the POSIX implementation layer in glibc - <antrik> relations are a bit tricky - <antrik> Mach is the base layer which implements IPC and memory management - <foocraft> hmm I'll probably allocate time for dependency graph generation, - in the worst case - <antrik> on top of this, the Hurd servers, using the server libraries, - implement various aspects of the system functionality - <antrik> client programs use libc calls to use the servers - <antrik> (servers also use libc to communicate with other servers and/or - Mach though) - <foocraft> so every server depends solely on mach, and no other server? - <foocraft> s/mach/mach and/or libc/ - <antrik> I think these things should be pretty clear one you are somewhat - familiar with the Hurd architecture... nothing really tricky there - <antrik> no - <antrik> servers often depend on other servers for certain functionality +# Introduction to the Hurd System + +The lowest base of the GNU/Hurd system is GNU Mach. GNU Mach is a microkernel, +which provides interprocess communication (IPC), memory management, and a scheduler. +The Hurd servers runs on top of GNU Mach to implement various userspace servers that +would ordinarily reside in the kernel, including the filesystem, device drivers, +TCP/IP stack, and others. The GNU/Hurd system implements POSIX with glibc. Almost all +POSIX calls to glibc are re-routed to the Hurd servers. Some of the Hurd servers +depend on GNU Mach, while other Hurd servers depend on other Hurd servers. + + The Hurd + + --------------------------- + | glibc | + | | + | read | + --------------------------- + \ + \ + \ + \ + --------------------------------------- + | \ Hurd Servers | + | ext2fs auth --- other servers | + | \ | + -------------------------------------- + \ + libdiskfs + \ / + \ / + \/ + GNU Mach # Bootstrap ## [[hurd_init]] -## IRC, freenode, #hurd, 2011-03-12 +## Hurd Booting Process + +When grub starts running, it loads the root filesystem, the exec server, and +starts GNU Mach. GNU Mach then starts the servers in turn according to the +multiboot information grub gave it. Additionally the rootfs server +does some bootstrapping work to bring the start the other servers. + +### IRC, freenode, #hurd booting process, 2011-03-12 <dEhiN> when mach first starts up, does it have some basic i/o or fs functionality built into it to start up the initial hurd translators? |