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* Use uint32_t instead of unsigned32_t.Flavio Cruz2016-04-044-29/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement stdint.h and use it in gnumach. Remove old type definitions such as signed* and unsigned*. * Makefile.am: Add -ffreestanding. * i386/i386/xen.h: Use uint64_t. * i386/include/mach/i386/machine_types.defs: Use uint32_t and int32_t. * i386/include/mach/i386/vm_types.h: Remove definitions of int*, uint*, unsigned* and signed* types. * i386/xen/xen.c: Use uint64_t. * include/device/device_types.defs: Use uint32_t. * include/mach/std_types.defs: Use POSIX types. * include/mach/std_types.h: Include stdint.h. * include/stdint.h: New file with POSIX types. * include/sys/types.h: Include stdint.h. * ipc/ipc_kmsg.c: Use uint64_t. * kern/exception.c: Use uint32_t. * linux/dev/include/linux/types.h: Remove POSIX types. * xen/block.c: Use uint64_t. * xen/net.c: Do not use removed unsigned*_t types. * xen/ring.h: Use uint32_t instead. * xen/store.c: Use uint32_t. * xen/store.h: Use uint32_t. * xen/time.c: Use POSIX types only. * xen/time.h: Use uint64_t.
* Make kernel mapping start address configurableSamuel Thibault2016-03-192-2/+7
| | | | | | | | and move it to 16MiB by default to free 24bit DMA area * i386/configfrag.ac (--with-_START_MAP): Add option, default to 0x1000000. * i386/Makefrag.am (_START_MAP): Set to $(_START_MAP). (_START): Set to _START_MAP+0xC0000000.
* Ship missing filesSamuel Thibault2016-03-111-0/+1
| | | | | | Makefrag.am (libkernel_a_SOURCES): Add kern/log2.h. (EXTRA_DIST): Add kern/exc.defs. i386/Makefrag.am (libkernel_a_SOURCES): Add i386/i386at/elf.h.
* Inherit fpu control word from parent to childSamuel Thibault2016-03-065-14/+46
| | | | | | | | | | | | * i386/i386/thread.h (struct pcb): Add init_control field. * i386/i386/fpu.h (fpinherit): New prototype. * i386/i386/fpu.c (fpinit): Add thread parameter. When init_control field is set, use that value instead of a hardcoded one. (fpinherit): New function. (fp_load): Pass thread parameter to fpinit(). * kern/thread.c (thread_create): Pass parent task to pcb_init(). * i386/i386/pcb.c (pcb_init): Add parent_task parameter, call fpinherit when it is equal to current_task().
* i386: add parts of cpu.h from x15Justus Winter2016-02-282-0/+111
| | | | | * i386/Makefrag.am (libkernel_a_SOURCES): Add new file. * i386/i386/cpu.h: New file.
* Document why code is not racySamuel Thibault2016-02-261-0/+2
| | | | | * i386/i386at/kd_mouse.c (kd_mouse_read): Document why the assert_wait/thread_block pair is not racy.
* Reduce VM_KERNEL_MAP_SIZESamuel Thibault2016-02-141-2/+2
| | | | | | Now that KMEM_MAP_SIZE (128MiB) has been removed. * i386/i386/vm_param.h (VM_KERNEL_MAP_SIZE): Decrease by 128MiB.
* Fix unused variable warningsRichard Braun2016-02-021-3/+0
| | | | * i386/i386at/biosmem.c (biosmem_bootstrap): Remove unused variables.
* Stack the slab allocator directly on top of the physical allocatorRichard Braun2016-02-028-23/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to increase the amount of memory available for kernel objects, without reducing the amount of memory available for user processes, a new allocation strategy is introduced in this change. Instead of allocating kernel objects out of kernel virtual memory, the slab allocator directly uses the direct mapping of physical memory as its backend. This largely increases the kernel heap, and removes the need for address translation updates. In order to allow this strategy, an assumption made by the interrupt code had to be removed. In addition, kernel stacks are now also allocated directly from the physical allocator. * i386/i386/db_trace.c: Include i386at/model_dep.h (db_i386_reg_value): Update stack check. * i386/i386/locore.S (trap_from_kernel, all_intrs, int_from_intstack): Update interrupt handling. * i386/i386at/model_dep.c: Include kern/macros.h. (int_stack, int_stack_base): New variables. (int_stack_high): Remove variable. (i386at_init): Update interrupt stack initialization. * i386/i386at/model_dep.h: Include i386/vm_param.h. (int_stack_top, int_stack_base): New extern declarations. (ON_INT_STACK): New macro. * kern/slab.c: Include vm/vm_page.h (KMEM_CF_NO_CPU_POOL, KMEM_CF_NO_RECLAIM): Remove macros. (kmem_pagealloc, kmem_pagefree, kalloc_pagealloc, kalloc_pagefree): Remove functions. (kmem_slab_create): Allocate slab pages directly from the physical allocator. (kmem_slab_destroy): Release slab pages directly to the physical allocator. (kmem_cache_compute_sizes): Update the slab size computation algorithm to return a power-of-two suitable for the physical allocator. (kmem_cache_init): Remove custom allocation function pointers. (kmem_cache_reap): Remove check on KMEM_CF_NO_RECLAIM. (slab_init, kalloc_init): Update calls to kmem_cache_init. (kalloc, kfree): Directly fall back on the physical allocator for big allocation sizes. (host_slab_info): Remove checks on defunct flags. * kern/slab.h (kmem_slab_alloc_fn_t, kmem_slab_free_fn_t): Remove types. (struct kmem_cache): Add `slab_order' member, remove `slab_alloc_fn' and `slab_free_fn' members. (KMEM_CACHE_NOCPUPOOL, KMEM_CACHE_NORECLAIM): Remove macros. (kmem_cache_init): Update prototype, remove custom allocation functions. * kern/thread.c (stack_alloc): Allocate stacks from the physical allocator. * vm/vm_map.c (vm_map_kentry_cache, kentry_data, kentry_data_size): Remove variables. (kentry_pagealloc): Remove function. (vm_map_init): Update calls to kmem_cache_init, remove initialization of vm_map_kentry_cache. (vm_map_create, _vm_map_entry_dispose, vm_map_copyout): Unconditionnally use vm_map_entry_cache. * vm/vm_map.h (kentry_data, kentry_data_size, kentry_count): Remove extern declarations. * vm/vm_page.h (VM_PT_STACK): New page type. * device/dev_lookup.c (dev_lookup_init): Update calls to kmem_cache_init. * device/dev_pager.c (dev_pager_hash_init, device_pager_init): Likewise. * device/ds_routines.c (mach_device_init, mach_device_trap_init): Likewise. * device/net_io.c (net_io_init): Likewise. * i386/i386/fpu.c (fpu_module_init): Likewise. * i386/i386/machine_task.c (machine_task_module_init): Likewise. * i386/i386/pcb.c (pcb_module_init): Likewise. * i386/intel/pmap.c (pmap_init): Likewise. * ipc/ipc_init.c (ipc_bootstrap): Likewise. * ipc/ipc_marequest.c (ipc_marequest_init): Likewise. * kern/act.c (global_act_init): Likewise. * kern/processor.c (pset_sys_init): Likewise. * kern/rdxtree.c (rdxtree_cache_init): Likewise. * kern/task.c (task_init): Likewise. * vm/memory_object_proxy.c (memory_object_proxy_init): Likewise. * vm/vm_external.c (vm_external_module_initialize): Likewise. * vm/vm_fault.c (vm_fault_init): Likewise. * vm/vm_object.c (vm_object_bootstrap): Likewise. * vm/vm_resident.c (vm_page_module_init): Likewise. (vm_page_bootstrap): Remove initialization of kentry_data.
* Fix early page allocation on XenRichard Braun2016-01-306-12/+102
| | | | | | | | | | | | | | | | | | | | | | The Xen target was completely ignored when porting the biosmem and vm_page physical memory allocators. Let's fix this. * i386/Makefrag.am (libkernel_a_SOURCES): Add i386/i386at/biosmem.{c,h}. * i386/i386/vm_page.h (VM_PAGE_MAX_SEGS, VM_PAGE_DIRECTMAP_LIMIT, VM_PAGE_HIGHMEM_LIMIT): Define for Xen. * i386/i386at/biosmem.c: Include mach/xen.h. (biosmem_panic_setup_msg): Comment out for Xen since it's unused. (biosmem_map_build, biosmem_map_build_simple, biosmem_save_cmdline_sizes, biosmem_find_boot_data_update, biosmem_find_boot_data, biosmem_setup_allocator): Likewise. (biosmem_bootstrap_common): New function. (biosmem_xen_bootstrap): Likewise, for Xen. (biosmem_bootalloc): Perform bottom-up allocations for Xen. * i386/i386at/biosmem.h (biosmem_xen_bootstrap): New prototype, for Xen. * i386/i386at/model_dep.c (i386at_init): Call biosmem_xen_bootstrap instead of biosmem_bootstrap on Xen. * i386/include/mach/i386/vm_types.h (phys_addr_t): Define as an unsigned 64-bits integer when PAE is enabled.
* Use vm_page as the physical memory allocatorRichard Braun2016-01-234-272/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change replaces the historical page allocator with a buddy allocator implemented in vm/vm_page.c. This allocator allows easy contiguous allocations and also manages memory inside segments. In a future change, these segments will be used to service requests with special constraints, such as "usable for 16-bits DMA" or "must be part of the direct physical mapping". * Makefrag.am (libkernel_a_SOURCES): Add vm/vm_page.c. * i386/Makefrag.am (libkernel_a_SOURCES): Add i386/i386at/biosmem.{c,h}. * i386/i386/vm_param.h: Include kern/macros.h. (VM_PAGE_DMA_LIMIT, VM_PAGE_MAX_SEGS, VM_PAGE_DMA32_LIMIT, VM_PAGE_DIRECTMAP_LIMIT, VM_PAGE_HIGHMEM_LIMIT, VM_PAGE_SEG_DMA, VM_PAGE_SEG_DMA32, VM_PAGE_SEG_DIRECTMAP, VM_PAGE_SEG_HIGHMEM): New macros. * i386/i386at/model_dep.c: Include i386at/biosmem.h. (avail_next, avail_remaining): Remove variables. (mem_size_init): Remove function. (i386at_init): Initialize and use the biosmem module for early physical memory management. (pmap_free_pages): Return phys_last_addr instead of avail_remaining. (init_alloc_aligned): Turn into a wrapper for biosmem_bootalloc. (pmap_grab_page): Directly call init_alloc_aligned instead of pmap_next_page. * i386/include/mach/i386/vm_types.h (phys_addr_t): New type. * kern/bootstrap.c (free_bootstrap_pages): New function. (bootstrap_create): Call free_bootstrap_pages instead of vm_page_create. * kern/cpu_number.h (CPU_L1_SIZE): New macro. * kern/slab.h: Include kern/cpu_number.h. (CPU_L1_SIZE): Remove macro, moved to kern/cpu_number.h. * kern/startup.c (setup_main): Change the value of machine_info.memory_size. * linux/dev/glue/glue.h (alloc_contig_mem, free_contig_mem): Update prototypes. * linux/dev/glue/kmem.c (linux_kmem_init): Don't use defunct page queue. * linux/dev/init/main.c (linux_init): Don't free unused memory. (alloc_contig_mem, free_contig_mem): Turn into wrappers for the vm_page allocator. * linux/pcmcia-cs/glue/ds.c (PAGE_SHIFT): Don't undefine. * vm/pmap.h (pmap_startup, pmap_next_page): Remove prototypes. * vm/vm_fault.c (vm_fault_page): Update calls to vm_page_convert. * vm/vm_init.c (vm_mem_init): Call vm_page_info_all. * vm/vm_object.c (vm_object_page_map): Update call to vm_page_init. * vm/vm_page.h (vm_page_queue_free): Remove variable declaration. (vm_page_create, vm_page_release_fictitious, vm_page_release): Remove declarations. (vm_page_convert, vm_page_init): Update prototypes. (vm_page_grab_contig, vm_page_free_contig): New prototypes. * vm/vm_resident.c (vm_page_template, vm_page_queue_free, vm_page_big_pagenum): Remove variables. (vm_page_bootstrap): Update and call vm_page_setup. (pmap_steal_memory): Update and call vm_page_bootalloc. (pmap_startup, vm_page_create, vm_page_grab_contiguous_pages): Remove functions. (vm_page_init_template, vm_page_grab_contig, vm_page_free_contig): New functions. (vm_page_init): Update and call vm_page_init_template. (vm_page_release_fictitious): Make static. (vm_page_more_fictitious): Update call to vm_page_init. (vm_page_convert): Rewrite to comply with vm_page. (vm_page_grab): Update and call vm_page_alloc_pa. (vm_page_release): Update and call vm_page_free_pa.
* Import the biosmem module from X15 and relicense to GPLv2+Richard Braun2016-01-232-0/+928
| | | | | * i386/i386at/biosmem.c: New file. * i386/i386at/biosmem.h: Likewise.
* Import the multiboot module from X15 and relicense to GPLv2+Richard Braun2016-01-231-0/+105
| | | | * i386/include/mach/i386/multiboot.h: Merge multiboot.h from X15.
* Import the elf module from X15 and relicense to GPLv2+Richard Braun2016-01-231-0/+61
| | | | * i386/i386at/elf.h: New file.
* Increase kernel map sizeSamuel Thibault2016-01-131-2/+2
| | | | | | | | To avoid running out of memory due to the increased consumption by radix trees which replaced arrays. * kern/slab.c (KMEM_MAP_SIZE): Bump from 96MiB to 128MiB. * i386/i386/vm_param.h (VM_KERNEL_MAP_SIZE): Add 32MiB accordingly.
* fix t_addr assignment in lpropenFlavio Cruz2016-01-021-12/+14
| | | | * i386/i386at/lpr.c (lpropen): Fix assignment to t_addr.
* remove unnused disk code and headersFlavio Cruz2016-01-013-226/+0
| | | | | | | * i386/Makefrag.am: Remove disk.h. * i386/i386at/disk.h: Remove unnused definitions. * i386/include/mach/i386/disk.h: Remove. * linux/dev/glue/block.c (device_get_status): Remove V_GETPARMS case.
* fix some compiler warnings in gnumachFlavio Cruz2016-01-012-1/+3
| | | | | | | | * linux/dev/glue/block.c (out): Cast to device_t. * linux/dev/init/main.c (alloc_contig_mem): Initialize addr and cast return value to void *. * i386/i386/phys.c (pmap_copy_page): Initialize src_map. * i386/intel/pmap.c: Include i386at/model_dep.h. * kern/mach_clock.c (mapable_time_init): Cast to void *.
* Fix boot under kvm in linux 4.3Samuel Thibault2015-12-111-0/+3
| | | | * i386/i386/locore.S (discover_x86_cpu_type): Disable Cyrix CPU discovery.
* Fix boundSamuel Thibault2015-11-271-1/+1
| | | | * i386/i386at/lpr.c (lprprobe): Fix checking unit against NLPR.
* i386: trace syscalls of a single taskJustus Winter2015-09-271-0/+5
| | | | | * i386/i386/debug_i386.c (syscall_trace_task): New variable. (syscall_trace_print): If set, trace only syscalls from this task.
* i386: improve syscall tracingJustus Winter2015-09-271-5/+16
| | | | | | | * kern/syscall_sw.h (mach_trap_t): Turn unused field into `mach_trap_name'. (MACH_TRAP, MACH_TRAP_STACK): Record name. * i386/i386/debug_i386.c (syscall_trace_print): Use the name and format the arguments to look like c.
* Fix build with -DDEBUGJustus Winter2015-09-272-1/+3
| | | | | | | * device/cirbuf.c: Add missing include. * i386/i386/debug.h (dump_ss): Hide declaration from assembler. * i386/i386/debug_i386.c: Fix include. * kern/sched_prim.h: Add missing include, fix declaration.
* Reserve 64k at beginning of memory, not just 4kSamuel Thibault2015-08-311-3/+5
| | | | | | | | | Linux does this to be extra careful with some BIOSes which apparently spuriously write between 4k and 64k. * i386/i386at/model_dep.c (RESERVED_BIOS): New macro. (avail_next, mem_size_init, init_alloc_aligned): Use RESERVED_BIOS instead of hardcoded 0x1000.
* Fix printk not handling ANSI escape codesJames Clarke2015-08-302-24/+40
| | | | | | | | | * i386/i386at/kd.c (kdstart): Moved escape sequence handling to new kd_putc_esc function. (kd_putc_esc): New function with logic from kdstart. (kdcnputc): Call kd_putc_esc rather than kd_putc to allow for ANSI escape codes. * i386/i386at/kd.h (kd_putc_esc): New function.
* i386: enable assertionsJustus Winter2015-08-201-8/+4
| | | | | * i386/intel/pmap.c (pmap_page_protect): Enable assertions. (phys_attribute_clear, phys_attribute_test): Likewise.
* i386: fix panic messageJustus Winter2015-08-181-1/+1
| | | | | * i386/intel/pmap.c (pmap_page_protect): Fix function name in panic message.
* i386: fix typoJustus Winter2015-07-151-1/+1
| | | | * i386/intel/pmap.c: Fix typo.
* i386: fix line wrapping in the immediate consoleJustus Winter2015-07-091-1/+1
| | | | * i386/i386at/immc.c (immc_cnputc): Fix line wrapping.
* i386: improve the immediate consoleJustus Winter2015-06-288-14/+119
| | | | | | | | | | | | | | | | | | | Improve the immediate console to the point that it can be enabled and display e.g. assertion failures from very early on (i.e. from `c_boot_entry'). * device/cons.h (romgetc, romputc): New declarations. * i386/configfrag.ac: Add configuration variable. * i386/i386at/conf.c (dev_name_list): Add entry. * i386/i386at/cons_conf.c (constab): Add entry. * i386/i386at/immc.c: Add missing includes. (immc_cnprobe, immc_cninit, immc_cngetc, immc_romputc): New functions. (immc_cnputc): Fix signature, use virtual addresses. * i386/i386at/immc.h: New file. * i386/i386at/kd.c: Use `#if ENABLE_IMMEDIATE_CONSOLE'. * i386/i386at/kd.h (kd_setpos): Add missing declaration. * i386/i386at/model_dep.c (c_boot_entry): Install immediate console as early boot console.
* i386: add commentJustus Winter2015-06-261-0/+1
| | | | * i386/i386at/model_dep.c (rebootflag): Explain flag.
* i386: avoid breaking the strict-aliasing rulesJustus Winter2015-05-231-1/+7
| | | | * i386/i386/pcb.c (switch_ktss): Cleanly convert the value.
* kern: import `macros.h' from x15Justus Winter2015-05-193-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Import the macro definitions from the x15 kernel project, and replace all similar definitions littered all over the place with it. Importing this file will make importing code from the x15 kernel easier. We are already using the red-black tree implementation and the slab allocator from it, and we will import even more code in the near future. * kern/list.h: Do not define `structof', include `macros.h' instead. * kern/rbtree.h: Likewise. * kern/slab.c: Do not define `ARRAY_SIZE', include `macros.h' instead. * i386/grub/misc.h: Likewise. * i386/i386/xen.h: Do not define `barrier', include `macros.h' instead. * kern/macro_help.h: Delete file. Replaced by `macros.h'. * kern/macros.h: New file. * Makefrag.am (libkernel_a_SOURCES): Add new file, remove old file. * device/dev_master.h: Adopt accordingly. * device/io_req.h: Likewise. * device/net_io.h: Likewise. * i386/intel/read_fault.c: Likewise. * ipc/ipc_kmsg.h: Likewise. * ipc/ipc_mqueue.h: Likewise. * ipc/ipc_object.h: Likewise. * ipc/ipc_port.h: Likewise. * ipc/ipc_space.h: Likewise. * ipc/ipc_splay.c: Likewise. * ipc/ipc_splay.h: Likewise. * kern/assert.h: Likewise. * kern/ast.h: Likewise. * kern/pc_sample.h: Likewise. * kern/refcount.h: Likewise. * kern/sched.h: Likewise. * kern/sched_prim.c: Likewise. * kern/timer.c: Likewise. * kern/timer.h: Likewise. * vm/vm_fault.c: Likewise. * vm/vm_map.h: Likewise. * vm/vm_object.h: Likewise. * vm/vm_page.h: Likewise.
* i386: avoid compiler warningJustus Winter2015-05-171-10/+15
| | | | | | * i386/i386/phys.c (pmap_zero_page, pmap_copy_page, copy_to_phys, copy_from_phys): Avoid compiler warning about `map' being used uninitialized.
* i386: use macro to compute address of saved registersJustus Winter2015-05-141-2/+2
| | | | | * i386/i386/pcb.c (stack_attach): Use `USER_REGS'. (stack_handoff): Likewise.
* Fix warningSamuel Thibault2015-05-021-2/+4
| | | | | * i386/i386at/rtc.c (rtcget, rtcput): Make functions take an rtc_st structure which it casts to char * itself.
* Prepend 0x to hexadecimal offsetSamuel Thibault2015-04-231-1/+1
| | | | * i386/i386/db_trace.c (db_i386_stack_trace): Prepend 0x to hexadecimal offset.
* Remove spl debugging in Xen caseSamuel Thibault2015-03-081-4/+4
| | | | | | xen cli/sti doesn't use IF * i386/i386/spl.S [MACH_XEN]: Disable IF check.
* Use printf_once instead of recoding itSamuel Thibault2015-02-262-16/+2
| | | | | * i386/i386at/kd_event.c: Call printf_once instead of recoding it. * i386/i386at/kd_mouse.c: Likewise.
* Limit printing "queue full" messagesSamuel Thibault2015-02-262-2/+16
| | | | | | * i386/i386at/kd_event.c (kbd_enqueue): Print "queue full" warning only once. * i386/i386at/kd_mouse.c (mouse_enqueue): Likewise.
* i386: specialize `copyinmsg' and `copyoutmsg'Justus Winter2015-02-201-4/+79
| | | | | | | | | | | | Previously, `copyinmsg' was the same function as `copyin'. The former is for messages, and the size of messages is a multiple of four. Likewise for `copyoutmsg'. Provide a specialized version of both functions. This shaves off a couple of instructions and improves our IPC performance. * i386/i386/locore.S (copyinmsg): New function. (copyoutmsg): New function.
* i386: drop needless instruction from `copyout'Justus Winter2015-02-201-3/+2
| | | | | * i386/i386/locore.S (copyout): Do not needlessly copy length to %eax first.
* i386: Fix typos in comments (found by codespell)Stefan Weil2015-01-026-8/+8
| | | | Signed-off-by: Stefan Weil <sw@weilnetz.de>
* Handle kernel traps happening before starting userlandSamuel Thibault2015-01-021-3/+3
| | | | | * i386/i386/trap.c (kernel_trap): When current_thread is null, assume that we are in kernel land.
* Make spl7 just clear IF instead of setting the PIC maskSamuel Thibault2014-12-152-3/+39
| | | | | | | | | | * i386/i386/spl.S (spl7): Just set curr_ipl and cli. (splx) [MACH_KDB || MACH_TTD]: When curr_ipl is 7, make sure that IF is cleared. (splx): When staying at ipl7, do not enable interrupts. (spl) [MACH_KDB || MACH_TTD]: When curr_ipl is 7, make sure that IF is cleared. (spl): When new ipl is 7, branch to spl7. * i386/i386/locore.S (TIME_TRAP_UENTRY, TIME_TRAP_SENTRY): Save flags, and restore them instead of blindly using sti.
* Only set debug registers when they are usedSamuel Thibault2014-11-161-6/+17
| | | | | | | | * i386/i386/db_interface.c (zero_dr): New variable (db_load_context): Do not set debug registers to zero when they are already zero. (db_dr): When kernel debug registers get zero, record that the debug registers have been zeroed.
* ddb: add support for ELF symbol tablesJustus Winter2014-09-171-0/+27
| | | | | | | | | | | | * ddb/db_elf.c: New file. * ddb/db_elf.h: Likewise. * Makefrag.am (libkernel_a_SOURCES): Add db_elf.{c,h}. * ddb/db_sym.c (dummy_db_sym_init): New stub db_sym_init function. (db_sym_switch): Add ELF functions. * ddb/db_sym.h (SYMTAB_ELF): New macro. (elf_db_sym_init): New declaration. * i386/i386at/model_dep.c (c_boot_entry): Get ELF section header information from the multiboot structure, and call elf_db_sym_init.
* Report DR6 to userlandSamuel Thibault2014-09-171-0/+5
| | | | | * i386/i386/trap.c (user_trap): On T_DEBUG, record the content of dr6 in PCB, and clear it.
* Fix computationSamuel Thibault2014-08-221-1/+1
| | | | * i386/i386at/com.c (comintr): Fix computation of '@'.
* Even less magic-looking control valueNeal H. Walfield2014-08-221-1/+1
| | | | * i386/i386at/com.c (comintr): Use 'A'-1 instead of '@'.
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