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* sys: Remove $FreeBSD$: one-line .h patternWarner Losh2023-08-161-1/+0
| | | | Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/
* Move kstack_contains() and GET_STACK_USAGE() to MD machine/stack.hKonstantin Belousov2023-02-011-12/+0
| | | | | | | Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D38320
* Make struct syscall_args machine independentBrooks Davis2021-12-081-8/+0
| | | | | | | | | | | | | | | | | | After a round of cleanups in late 2020, all definitions are functionally identical. This removes a rotted __aligned(8) on arm. It was added in b7112ead32bc50ef9744099bdbb1cfbd6e906b2a and was intended to align the args member so that 64-bit types (off_t, etc) could be safely read on armeb compiled with clang. With the removal of armev, this is no longer needed (armv7 requires that 32-bit aligned reads of 64-bit values be supported and we enable such support on armv6). As further evidence this is unnecessary, cleanups to struct syscall_args have resulted in args being 32-bit aligned on 32-bit systems. The sole effect is to bloat the struct by 4 bytes. Reviewed by: kib, jhb, imp Differential Revision: https://reviews.freebsd.org/D33308
* arm64, powerpc: fix calculation of 'used' in GET_STACK_USAGEMitchell Horne2021-11-301-3/+1
| | | | | | | | | We do not consider the space reserved for the pcb to be part of the total kstack size, so it should not be included in the calculation of the used stack size. MFC after: 1 week Sponsored by: The FreeBSD Foundation
* Pass the syscall number to capsicum permission-denied signalsDavid Chisnall2021-07-161-0/+1
| | | | | | | | | | | | | | | | | | The syscall number is stored in the same register as the syscall return on amd64 (and possibly other architectures) and so it is impossible to recover in the signal handler after the call has returned. This small tweak delivers it in the `si_value` field of the signal, which is sufficient to catch capability violations and emulate them with a call to a more-privileged process in the signal handler. This reapplies 3a522ba1bc852c3d4660a4fa32e4a94999d09a47 with a fix for the static assertion failure on i386. Approved by: markj (mentor) Reviewed by: kib, bcr (manpages) Differential Revision: https://reviews.freebsd.org/D29185
* Revert "Pass the syscall number to capsicum permission-denied signals"David Chisnall2021-07-101-1/+0
| | | | | | This broke the i386 build. This reverts commit 3a522ba1bc852c3d4660a4fa32e4a94999d09a47.
* Pass the syscall number to capsicum permission-denied signalsDavid Chisnall2021-07-101-0/+1
| | | | | | | | | | | | | | | The syscall number is stored in the same register as the syscall return on amd64 (and possibly other architectures) and so it is impossible to recover in the signal handler after the call has returned. This small tweak delivers it in the `si_value` field of the signal, which is sufficient to catch capability violations and emulate them with a call to a more-privileged process in the signal handler. Approved by: markj (mentor) Reviewed by: kib, bcr (manpages) Differential Revision: https://reviews.freebsd.org/D29185
* Make powerpc use MAXARGS (defined as 8) instead of hardcoding '10'.Edward Tomasz Napierala2020-11-061-1/+2
| | | | | | | | | | | | This brings its 'struct syscall_args' in sync with other architectures. Reviewed by: bdragon, jhibbits MFC after: 2 weeks Sponsored by: EPSRC Differential Revision: https://reviews.freebsd.org/D26605 Notes: svn path=/head/; revision=367430
* Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.Edward Tomasz Napierala2020-09-271-1/+0
| | | | | | | | | Reviewed by: kib Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D26458 Notes: svn path=/head/; revision=366205
* powerpc/radix mmu: No need for delayed TLB invalidationJustin Hibbits2020-05-201-6/+0
| | | | | | | | | x86 needs delayed TLB invalidation because invalidation requires an expensive IPI. PowerPC has had a TLB invalidation instruction since the POWER1 in 1990, so there's no need to delay anything. Notes: svn path=/head/; revision=361271
* powerpc64: Implement Radix MMU for POWER9 CPUsJustin Hibbits2020-05-111-0/+6
| | | | | | | | | | | | | | | | Summary: POWER9 supports two MMU formats: traditional hashed page tables, and Radix page tables, similar to what's presesnt on most other architectures. The PowerISA also specifies a process table -- a table of page table pointers-- which on the POWER9 is only available with the Radix MMU, so we can take advantage of it with the Radix MMU driver. Written by Matt Macy. Differential Revision: https://reviews.freebsd.org/D19516 Notes: svn path=/head/; revision=360887
* Fix style and clarify commentLeandro Lupori2019-08-121-3/+2
| | | | | | | Fix code style in proc.h and clarify comment about empty structs. Notes: svn path=/head/; revision=350953
* [ppc] avoid empty mdproc structLeandro Lupori2019-08-121-0/+5
| | | | | | | | | | | | Avoid empty structs, that have undefined behavior in C99 and make compilers complain about it (empty struct has size 0 in C, size 1 in C++). Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D21231 Notes: svn path=/head/; revision=350902
* sys: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-201-0/+2
| | | | | | | | | | | | | | | | | Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point. Notes: svn path=/head/; revision=326023
* Solve the y2038 problem for powerpcJustin Hibbits2017-06-261-2/+2
| | | | | | | | | | | | | | | AKA Make time_t 64 bits on powerpc(32). PowerPC currently (until now) was one of two architectures with a 32-bit time_t on 32-bit archs (the other being i386). This is an ABI breakage, so all ports, and all local binaries, *must* be recompiled. Tested by: andreast, others MFC after: Never Relnotes: Yes Notes: svn path=/head/; revision=320347
* Make struct syscall_args visible to userspace compilation environmentKonstantin Belousov2017-06-121-7/+7
| | | | | | | | | | | | from machine/proc.h, consistently on all architectures. Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 3 weeks X-Differential revision: https://reviews.freebsd.org/D11080 Notes: svn path=/head/; revision=319871
* Implement GET_STACK_USAGE() on PowerPC. This implementation is identicalNathan Whitehorn2013-10-021-0/+12
| | | | | | | | | to that on x86 and sparc64. Approved by: re (kib) Notes: svn path=/head/; revision=256007
* Remove unused define.Konstantin Belousov2011-10-071-1/+0
| | | | | | | MFC after: 1 month Notes: svn path=/head/; revision=226112
* MFppc64:Nathan Whitehorn2010-07-131-0/+5
| | | | | | | | | | Kernel sources for 64-bit PowerPC, along with build-system changes to keep 32-bit kernels compiling (build system changes for 64-bit kernels are coming later). Existing 32-bit PowerPC kernel configurations must be updated after this change to specify their architecture. Notes: svn path=/head/; revision=209975
* Reorganize syscall entry and leave handling.Konstantin Belousov2010-05-231-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extend struct sysvec with three new elements: sv_fetch_syscall_args - the method to fetch syscall arguments from usermode into struct syscall_args. The structure is machine-depended (this might be reconsidered after all architectures are converted). sv_set_syscall_retval - the method to set a return value for usermode from the syscall. It is a generalization of cpu_set_syscall_retval(9) to allow ABIs to override the way to set a return value. sv_syscallnames - the table of syscall names. Use sv_set_syscall_retval in kern_sigsuspend() instead of hardcoding the call to cpu_set_syscall_retval(). The new functions syscallenter(9) and syscallret(9) are provided that use sv_*syscall* pointers and contain the common repeated code from the syscall() implementations for the architecture-specific syscall trap handlers. Syscallenter() fetches arguments, calls syscall implementation from ABI sysent table, and set up return frame. The end of syscall bookkeeping is done by syscallret(). Take advantage of single place for MI syscall handling code and implement ptrace_lwpinfo pl_flags PL_FLAG_SCE, PL_FLAG_SCX and PL_FLAG_EXEC. The SCE and SCX flags notify the debugger that the thread is stopped at syscall entry or return point respectively. The EXEC flag augments SCX and notifies debugger that the process address space was changed by one of exec(2)-family syscalls. The i386, amd64, sparc64, sun4v, powerpc and ia64 syscall()s are changed to use syscallenter()/syscallret(). MIPS and arm are not converted and use the mostly unchanged syscall() implementation. Reviewed by: jhb, marcel, marius, nwhitehorn, stas Tested by: marcel (ia64), marius (sparc64), nwhitehorn (powerpc), stas (mips) MFC after: 1 month Notes: svn path=/head/; revision=208453
* Style: use #define<TAB> instead of #define<SPACE>.Konstantin Belousov2010-04-271-1/+1
| | | | | | | | Noted by: bde, pluknet gmail com MFC after: 11 days Notes: svn path=/head/; revision=207269
* Move the constants specifying the size of struct kinfo_proc intoKonstantin Belousov2010-04-241-0/+2
| | | | | | | | | | | | | machine-specific header files. Add KINFO_PROC32_SIZE for struct kinfo_proc32 for architectures providing COMPAT_FREEBSD32. Add CTASSERT for the size of struct kinfo_proc32. Submitted by: pluknet Reviewed by: imp, jhb, nwhitehorn MFC after: 2 weeks Notes: svn path=/head/; revision=207152
* Divorce critical sections from spinlocks. Critical sections as denoted byJohn Baldwin2005-04-041-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | critical_enter() and critical_exit() are now solely a mechanism for deferring kernel preemptions. They no longer have any affect on interrupts. This means that standalone critical sections are now very cheap as they are simply unlocked integer increments and decrements for the common case. Spin mutexes now use a separate KPI implemented in MD code: spinlock_enter() and spinlock_exit(). This KPI is responsible for providing whatever MD guarantees are needed to ensure that a thread holding a spin lock won't be preempted by any other code that will try to lock the same lock. For now all archs continue to block interrupts in a "spinlock section" as they did formerly in all critical sections. Note that I've also taken this opportunity to push a few things into MD code rather than MI. For example, critical_fork_exit() no longer exists. Instead, MD code ensures that new threads have the correct state when they are created. Also, we no longer try to fixup the idlethreads for APs in MI code. Instead, each arch sets the initial curthread and adjusts the state of the idle thread it borrows in order to perform the initial context switch. This change is largely a big NOP, but the cleaner separation it provides will allow for more efficient alternative locking schemes in other parts of the kernel (bare critical sections rather than per-CPU spin mutexes for per-CPU data for example). Reviewed by: grehan, cognet, arch@, others Tested on: i386, alpha, sparc64, powerpc, arm, possibly more Notes: svn path=/head/; revision=144637
* Compromise for critical*()/cpu_critical*() recommit. Cleanup the interruptMatthew Dillon2002-03-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | disablement assumptions in kern_fork.c by adding another API call, cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h to <arch>/<arch>/critical.c (stage-2 will clean this up). Implement interrupt deferral for i386 that allows interrupts to remain enabled inside critical sections. This also fixes an IPI interlock bug, and requires uses of icu_lock to be enclosed in a true interrupt disablement. This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized, and will move cpu_critical*() into its own header file(s) + other things. This commit may break non-i386 architectures in trivial ways. This should be temporary. Reviewed by: core Approved by: core Notes: svn path=/head/; revision=93264
* Overhaul the per-CPU support a bit:John Baldwin2001-12-111-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - The MI portions of struct globaldata have been consolidated into a MI struct pcpu. The MD per-CPU data are specified via a macro defined in machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the interface would be cleaner (PCPU_GET(my_md_field) vs. PCPU_GET(md.md_my_md_field)). - All references to globaldata are changed to pcpu instead. In a UP kernel, this data was stored as global variables which is where the original name came from. In an SMP world this data is per-CPU and ideally private to each CPU outside of the context of debuggers. This also included combining machine/globaldata.h and machine/globals.h into machine/pcpu.h. - The pointer to the thread using the FPU on i386 was renamed from npxthread to fpcurthread to be identical with other architectures. - Make the show pcpu ddb command MI with a MD callout to display MD fields. - The globaldata_register() function was renamed to pcpu_init() and now init's MI fields of a struct pcpu in addition to registering it with the internal array and list. - A pcpu_destroy() function was added to remove a struct pcpu from the internal array and list. Tested on: alpha, i386 Reviewed by: peter, jake Notes: svn path=/head/; revision=87702
* Add multiple inclusion protection.John Baldwin2001-12-061-0/+5
| | | | Notes: svn path=/head/; revision=87454
* KSE Milestone 2Julian Elischer2001-09-121-0/+3
| | | | | | | | | | | | | | | | | Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha Notes: svn path=/head/; revision=83366
* Add a new MI pointer to the process' trapframe p_frame instead of usingJohn Baldwin2001-06-291-1/+0
| | | | | | | | | various differently named pointers buried under p_md. Reviewed by: jake (in principle) Notes: svn path=/head/; revision=78962
* Bring in NetBSD code used in the PowerPC port.Benno Rice2001-06-101-0/+42
Reviewed by: obrien, dfr Obtained from: NetBSD Notes: svn path=/head/; revision=77957
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