| Commit message (Collapse) | Author | Age | Files | Lines |
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Move RTEMS_Malloc_Sbrk_amount to the only implementation file which uses
it and make it private to hide implementation-details from an API
header.
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Move rtems_calloc() since it only depends on rtems_malloc(). This may
make it easier to customize the heap allocator.
Change licence to BSD-2-Clause according to file history.
Update #3053.
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Last use was removed by:
commit 54550e048d3a49435912797d2024f80671e93267
Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri May 13 08:16:30 2016 +0200
posix: Rework pthread_join()
Rework pthread_join() to use _Thread_Join().
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The _CPU_ISR_Is_enabled() function operates on ISR cookies and so must
mask off the appropriate status bits. This also fixes the naming of the
parameters of the _CPU_ISR_* functions to indicate use of ISR cookies
instead of interrupt enable/disable levels.
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This reverts commit 8383572963e261ea384cddfa43cd9606e7c23cdd.
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This reverts commit 3299dda2454a8847c670a732f6c12ef1f2cc5dd0.
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CID 1399751: Unused value in fastlz2_compress().
Closes #4341
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CID 1255346: Unused value in rtems_shell_ls_printacol().
Closes #4340
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CID 1255344: Unused value in copy().
Closes #4339
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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Update #3850
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The directive returns RTEMS_UNSATISFIED if the semaphore's count already
had the maximum value of UINT32_MAX.
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Replace Objects_Name_or_id_lookup_errors with new Status_Control codes.
Get rid of the _Status_Object_name_errors_to_status lookup table.
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The value of STATUS_CLASSIC_INTERNAL_ERROR must be equal to
RTEMS_INTERNAL_ERROR. Add static assertions to ensure that the status
codes match.
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Do not adjust the stack area begin address since this may confuse the
stack allocator and result in failed stack frees.
Account for the alignment overhead in the stack space size estimate.
Check that the stack size is in the expected interval.
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At this point in time, /etc can be created in multiple ways. There
is a discussion (#4354) that would define a mechanism for
instantiating a base file system with some flexibility for the
set of directories included. For now, this particular mkdir()
call can fail because /etc could already have been created by
at least an initial filesystem image, the shell, or libbsd.
closes #4382.
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This speeds up reading fragmented files.
Fix #3689
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Adds a peek function that allows (for example) a file system to suggest
the next blocks that should be used for read ahead. This can increase
the read speed of fragmented files.
Update #3689
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The patch was:
gen_uuid.c: Fix two Unchecked return value from library errors
CID 1049146: Unchecked return value from library in get_clock().
CID 1049147: Unchecked return value from library in get_random_fd().
Reopen #4280
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Removed the _Assert_unused_variable_equals macro due to /etc
having already been created by the network stack initialization
or an initial filesystem image.
Closes #4282
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The while loop, loops infinitely in case of raw FDT data.
The loop condition (size) is not modified during iterations.
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Check only for invalid modes if a valid handler is presented to
rtems_signal_catch(). When NULL is used for the handler, ASR processing
is disabled and the mode is not used.
Update #4244.
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Do the ASR and preemption mode change only if requested by the mode
mask. The bug was introduced by
508f868237225a75e566d9fd304206363cfe441d.
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Do not mix checks for different error indicators (RTEMS_NOT_DEFINED and
RTEMS_INVALID_NUMBER). This simplifies the specification of
rtems_semaphore_create().
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Rejecting initially locked MrsP semaphores was due to a limitiation of
the early limitiation of the MrsP protocol. This limitation no longer
exists.
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MrsP semaphores are a generalization of the priority ceiling semaphores
for SMP configurations. Priority ceiling semaphores are required to use
the priority task wait queue discipline. Require this discipline also
for MrsP semaphores.
Close #4347.
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Move the CPU time budget to the thread configuration. This simplifies
_Thread_Initialize().
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Overview
========
The errata is worked around in the kernel without requiring toolchain
modifications. It is triggered the JMPL/RETT return from trap instruction
sequence never generated by the compiler and. There are also other
conditions that must must be true to trigger the errata, for example the
instruction that the trap returns to has to be a JMPL instruction. The
errata can only be triggered if certain data is corrected by ECC
(inflicted by radiation), thus it can not be triggered under normal
operation. For more information see:
www.gaisler.com/notes
Affected RTEMS target BSPs:
* GR712RC
* UT699
* UT700/699E
The work around is enabled by defining __FIX_LEON3_TN0018 at build time.
After applying the following GCC patch, GCC will set the define when
compiling for an affected multilib:
* GR712RC (-mcpu=leon3 -mfix-gr712rc)
* UT700/UT699E (-mpcu=leon3 -mfix-ut700)
* UT699 (-mcpu=leon -mfix-ut699)
When building for another multilib and TN0018 is still required, it
is possible to enable it on the RTEMS kernel configure line using the
TARGET_CFLAGS (-D__FIX_LEON3FT_TN0018) or other by other means.
The following GCC patch sets __FIX_LEON3FT_TN0018 for the affected RTEMS
multilibs:
---------
diff --git a/gcc/config/sparc/rtemself.h b/gcc/config/sparc/rtemself.h
index 6570590..ddec98c 100644
--- a/gcc/config/sparc/rtemself.h
+++ b/gcc/config/sparc/rtemself.h
@@ -33,6 +33,8 @@
builtin_assert ("system=rtems"); \
if (sparc_fix_b2bst) \
builtin_define ("__FIX_LEON3FT_B2BST"); \
+ if (sparc_fix_gr712rc || sparc_fix_ut700 || sparc_fix_ut699) \
+ builtin_define ("__FIX_LEON3FT_TN0018"); \
} \
while (0)
---------
Workaround Implementation
=========================
In general there are two approaches that the workaround uses:
A) avoid ECC restarting the RETT instruction
B) avoid returning from trap to a JMPL instruction
Where A) comes at a higher performance cost than B), so B) is used
where posssible. B) can be achived for certain returns from trap
handlers if trap entry is controlled by assembly, such as system calls.
A)
A special JMPL/RETT sequence where instruction cache is disabled
temporarily to avoid RETT containing ECC errors, and reading of RETT
source registers to "clean" them from incorrect ECC just before RETT
is executed.
B)
The work around prevents JMPL after system calls (TA instruction) and
modifies assembly code on return from traps jumping back to application
code. Note that for some traps the trapped instruction is always
re-executed and can therefore not trigger the errata, for example the
SAVE instruction causing window overflow or an float instruction causing
FPU disabled trap.
RTEMS SPARC traps workaround implementation:
NAME NOTE TRAP COMMENT
* window overflow 1 - 0x05 always returns to a SAVE
* window underflow 1 - 0x06 always returns to a RESTORE
* interrupt traps 2 - 0x10..1f special rett sequence workaround
* syscall 3 - 0x80 shutdown system - never returns
* ABI flush windows 2 - 0x83 special rett sequence workaround
* syscall_irqdis 4 - 0x89
* syscall_irqen 4 - 0x8A
* syscall_irqdis_fp 1 - 0x8B always jumps back to FP instruction
* syscall_lazy_fp_switch 5 - 0x04 A) jumps back to FP instruction, or to
B) _Internal_error() starting with SAVE
Notes:
1) no workaround needed because trap always returns to non-JMPL instruction
2) workaround implemented by special rett sequence
3) no workaround needed because system call never returns
4) workaround implemented by inserting NOP in system call generation. Thus
fall into 1) when workaround is enabled and no trap handler fix needed.
5) trap handler branches into both 1) and returning to _Internal_error()
which starts with a SAVE and besides since it shuts down the system that
RETT should never be in cache (only executed once) so fix not necessary
in this case.
Any custom trap handlers may also have to be updated. To simplify that,
helper work around assembly code in macros are available in a separate
include file <libcpu/grlib-tn-0018.h>.
Close #4155.
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Close #4336.
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Update #4336.
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Update #4336.
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CID 1437650: Unchecked return value from library in rtems_shell_help().
Closes #4291
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CID 1255518: Unchecked return value from library in pwdgrp_init().
Closes #4282
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CID 1063856: Unchecked return value from library in
rtems_shell_main_chmod().
Closes #4281
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CID 1049146: Unchecked return value from library in get_clock().
CID 1049147: Unchecked return value from library in get_random_fd().
Closes #4280
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CID 1255318: Unchecked return value in display_line().
Updates #4257
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CID 1399723: Missing break in switch in pci_read_addressable().
Closes #4279
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CID 1399726: Missing break in switch in task_usage().
CID 1399728: Missing break in switch in task_usage().
CID 1399742: Missing break in switch in task_usage().
Closes #4278
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Run with stack alignment faults enabled under RTEMS_DEBUG to catch any
stack misalignments early. This makes it easier to track them down
should they ever occur.
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