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285830 |
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23-Jul-2015 |
gjb |
- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1 builds. - Update newvers.sh to reflect RC1. - Update __FreeBSD_version to reflect 10.2. - Update default pkg(8) configuration to use the quarterly branch.[1]
Discussed with: re, portmgr [1] Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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256281 |
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10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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205428 |
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21-Mar-2010 |
marcel |
Don't include <machine/_regset.h> when _MACHINE_REGSET_H_ in defined. This is not for multiple inclusion purposes, because _regset.h already handles this, but to enable inclusion of the MD header by cross-tools on non-ia64 installations. The cross-tool can include _regset.h itself before including MD headers that depend on it.
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115084 |
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16-May-2003 |
marcel |
Revamp of the syscall path, exception and context handling. The prime objectives are: o Implement a syscall path based on the epc inststruction (see sys/ia64/ia64/syscall.s). o Revisit the places were we need to save and restore registers and define those contexts in terms of the register sets (see sys/ia64/include/_regset.h).
Secundairy objectives: o Remove the requirement to use contigmalloc for kernel stacks. o Better handling of the high FP registers for SMP systems. o Switch to the new cpu_switch() and cpu_throw() semantics. o Add a good unwinder to reconstruct contexts for the rare cases we need to (see sys/contrib/ia64/libuwx)
Many files are affected by this change. Functionally it boils down to: o The EPC syscall doesn't preserve registers it does not need to preserve and places the arguments differently on the stack. This affects libc and truss. o The address of the kernel page directory (kptdir) had to be unstaticized for use by the nested TLB fault handler. The name has been changed to ia64_kptdir to avoid conflicts. The renaming affects libkvm. o The trapframe only contains the special registers and the scratch registers. For syscalls using the EPC syscall path no scratch registers are saved. This affects all places where the trapframe is accessed. Most notably the unaligned access handler, the signal delivery code and the debugger. o Context switching only partly saves the special registers and the preserved registers. This affects cpu_switch() and triggered the move to the new semantics, which additionally affects cpu_throw(). o The high FP registers are either in the PCB or on some CPU. context switching for them is done lazily. This affects trap(). o The mcontext has room for all registers, but not all of them have to be defined in all cases. This mostly affects signal delivery code now. The *context syscalls are as of yet still unimplemented.
Many details went into the removal of the requirement to use contigmalloc for kernel stacks. The details are mostly CPU specific and limited to exception_save() and exception_restore(). The few places where we create, destroy or switch stacks were mostly simplified by not having to construct physical addresses and additionally saving the virtual addresses for later use.
Besides more efficient context saving and restoring, which of course yields a noticable speedup, this also fixes the dreaded SMP bootup problem as a side-effect. The details of which are still not fully understood.
This change includes all the necessary backward compatibility code to have it handle older userland binaries that use the break instruction for syscalls. Support for break-based syscalls has been pessimized in favor of a clean implementation. Due to the overall better performance of the kernel, this will still be notived as an improvement if it's noticed at all.
Approved by: re@ (jhb)
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95768 |
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30-Apr-2002 |
marcel |
Add ar.lc and ar.ec to the trapframe. These are not saved for syscalls, only for exceptions.
While adding this to exception_save and exception_restore, it was hard to find a good place to put the instructions. The code sequence was sufficiently arbitrarily ordered that the density was low (roughly 67%). No explicit bundling was used. Thus, I rewrote the functions to optimize for density (close to 80% now), and added explicit bundles and nop instructions. The immediate operand on the nop instruction has been incremented with each instance, to make debugging a bit easier when looking at recurring patterns. Redundant stops have been removed as much as possible. Future optimizations can focus more on performance. A well-placed lfetch can make all the difference here!
Also, the FRAME_Fxx defines in frame.h were mostly bogus. FRAME_F10 to FRAME_F15 were copied from FRAME_F9 and still had the same index. We don't use them yet, so nothing was broken.
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67522 |
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24-Oct-2000 |
dfr |
* Various fixes to breakage introduced by the atomic and mutex reorgs. * Fixes to the signal delivery code. Not quite right yet.
I would have preferred to wait until I have signal delivery actually working but the current kernel in CVS doesn't build.
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67199 |
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16-Oct-2000 |
dfr |
* Correct some of my misunderstandings about how best to switch to the kernel backing store. * Implement syscalls via break instructions. * Fix backing store copying in cpu_fork() so that the child gets the right register values.
This thing is actually starting to work now. This set of changes takes me up to the second execve (the one which runs the first shell). Next stop single-user mode :-).
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66458 |
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29-Sep-2000 |
dfr |
This is the first snapshot of the FreeBSD/ia64 kernel. This kernel will not work on any real hardware (or fully work on any simulator). Much more needs to happen before this is actually functional but its nice to see the FreeBSD copyright message appear in the ia64 simulator.
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