Age | Commit message (Collapse) | Author | Files | Lines | |
---|---|---|---|---|---|
2019-09-20 | nits | Robert Morris | 1 | -1/+1 | |
2019-09-13 | add `-bios none' to silence qemu | Xi Wang | 1 | -1/+3 | |
QEMU 4.1+ emits warnings if -bios is not given, as newer versions will load the OpenSBI firmware in this case. Pass `-bios none' to avoid this issue. | |||||
2019-08-26 | cow moved to xv6-riscv-fall19 | Frans Kaashoek | 1 | -1/+0 | |
2019-07-27 | split printf into a separate file, to make console.c more like a driver | Robert Morris | 1 | -0/+1 | |
2019-07-23 | a few core -> CPU | Robert Morris | 1 | -11/+1 | |
get rid of PDF generating support | |||||
2019-07-22 | -MD and TRAPFRAME | Robert Morris | 1 | -2/+2 | |
2019-07-01 | have fork() fail, not panic, if not enough phys mem | Robert Morris | 1 | -0/+1 | |
2019-06-13 | eliminate ramdisk | Robert Morris | 1 | -2/+0 | |
2019-06-13 | virtio disk driver | Robert Morris | 1 | -1/+3 | |
2019-06-11 | separate source into kernel/ user/ mkfs/ | Robert Morris | 1 | -74/+76 | |
2019-06-06 | gdb backtraces: -ggdb, -fno-omit-frame-pointer, BSIZE=1024 | Robert Morris | 1 | -2/+2 | |
2019-06-06 | add kernelvec | Robert Morris | 1 | -1/+1 | |
2019-06-05 | make -O work with asm volatile(...) | Robert Morris | 1 | -1/+1 | |
2019-06-05 | clean up -Wall | Robert Morris | 1 | -32/+3 | |
2019-06-05 | spinlocks using gcc intrinsics | Robert Morris | 1 | -1/+1 | |
push_off() / pop_off() set up per-hart plic stuff so all harts get device interrupts | |||||
2019-06-05 | start at support for multiple CPUs | Robert Morris | 1 | -2/+2 | |
2019-06-03 | push/pop all registers when handling interrupt from kernel | Robert Morris | 1 | -1/+3 | |
2019-05-31 | exec compiles but argstr() doesn't work yet | Robert Morris | 1 | -1/+3 | |
2019-05-31 | -initrd fs.img, ramdisk.c, file system | Robert Morris | 1 | -5/+15 | |
2019-05-31 | fork/wait/exit work | Robert Morris | 1 | -60/+41 | |
2018-09-23 | Checkpoint port of xv6 to x86-64. Passed usertests on 2 processors a few times. | Frans Kaashoek | 1 | -57/+22 | |
The x86-64 doesn't just add two levels to page tables to support 64 bit addresses, but is a different processor. For example, calling conventions, system calls, and segmentation are different from 32-bit x86. Segmentation is basically gone, but gs/fs in combination with MSRs can be used to hold a per-core pointer. In general, x86-64 is more straightforward than 32-bit x86. The port uses code from sv6 and the xv6 "rsc-amd64" branch. A summary of the changes is as follows: - Booting: switch to grub instead of xv6's bootloader (pass -kernel to qemu), because xv6's boot loader doesn't understand 64bit ELF files. And, we don't care anymore about booting. - Makefile: use -m64 instead of -m32 flag for gcc, delete boot loader, xv6.img, bochs, and memfs. For now dont' use -O2, since usertests with -O2 is bigger than MAXFILE! - Update gdb.tmpl to be for i386 or x86-64 - Console/printf: use stdarg.h and treat 64-bit addresses different from ints (32-bit) - Update elfhdr to be 64 bit - entry.S/entryother.S: add code to switch to 64-bit mode: build a simple page table in 32-bit mode before switching to 64-bit mode, share code for entering boot processor and APs, and tweak boot gdt. The boot gdt is the gdt that the kernel proper also uses. (In 64-bit mode, the gdt/segmentation and task state mostly disappear.) - exec.c: fix passing argv (64-bit now instead of 32-bit). - initcode.c: use syscall instead of int. - kernel.ld: load kernel very high, in top terabyte. 64 bits is a lot of address space! - proc.c: initial return is through new syscall path instead of trapret. - proc.h: update struct cpu to have some scratch space since syscall saves less state than int, update struct context to reflect x86-64 calling conventions. - swtch: simplify for x86-64 calling conventions. - syscall: add fetcharg to handle x86-64 calling convetions (6 arguments are passed through registers), and fetchaddr to read a 64-bit value from user space. - sysfile: update to handle pointers from user space (e.g., sys_exec), which are 64 bits. - trap.c: no special trap vector for sys calls, because x86-64 has a different plan for system calls. - trapasm: one plan for syscalls and one plan for traps (interrupt and exceptions). On x86-64, the kernel is responsible for switching user/kernel stacks. To do, xv6 keeps some scratch space in the cpu structure, and uses MSR GS_KERN_BASE to point to the core's cpu structure (using swapgs). - types.h: add uint64, and change pde_t to uint64 - usertests: exit() when fork fails, which helped in tracking down one of the bugs in the switch from 32-bit to 64-bit - vectors: update to make them 64 bits - vm.c: use bootgdt in kernel too, program MSRs for syscalls and core-local state (for swapgs), walk 4 levels in walkpgdir, add DEVSPACETOP, use task segment to set kernel stack for interrupts (but simpler than in 32-bit mode), add an extra argument to freevm (size of user part of address space) to avoid checking all entries till KERNBASE (there are MANY TB before the top 1TB). - x86: update trapframe to have 64-bit entries, which is what the processor pushes on syscalls and traps. simplify lgdt and lidt, using struct desctr, which needs the gcc directives packed and aligned. TODO: - use int32 instead of int? - simplify curproc(). xv6 has per-cpu state again, but this time it must have it. - avoid repetition in walkpgdir - fix validateint() in usertests.c - fix bugs (e.g., observed one a case of entering kernel with invalid gs or proc | |||||
2018-08-30 | thanks mtasm | Frans Kaashoek | 1 | -0/+7 | |
2018-08-30 | vectors.pl is executable and asks shell for perl | Frans Kaashoek | 1 | -1/+2 | |
2018-08-30 | thanks tyfkda | Frans Kaashoek | 1 | -2/+2 | |
2018-08-30 | x | Frans Kaashoek | 1 | -1/+1 | |
2018-08-30 | x | Frans Kaashoek | 1 | -1/+0 | |
2017-08-09 | Commit to running on an SMP (perhaps with only 1 core). Remove most code | Frans Kaashoek | 1 | -1/+0 | |
from picirq.c and remove timer.c completely. Update runoff.list. | |||||
2017-01-30 | Thanks to Wolfgang Keller <nubok@users.noreply.github.com> | Frans Kaashoek | 1 | -1/+1 | |
2017-01-30 | Add support for qemu-system-x86_64 in 64bit hosts | Antonio Gutierrez | 1 | -0/+2 | |
As x86-64 is a superset of x86, we can use qemu-system-x86_64 to run the OS image. Signed-off-by: Antonio Gutierrez <chibby0ne@gmail.com> | |||||
2016-09-26 | Fixed broken build on newer gold linker with NaCl support | Icenowy Zheng | 1 | -1/+1 | |
On platforms with NaCl support, ld.gold -V will return a "elf_i386_nacl" in addition to "elf_i386", which will make the build fail. | |||||
2016-09-11 | Straight replacement of B_BUSY with a sleeping lock. | Frans Kaashoek | 1 | -0/+1 | |
2016-08-18 | Fixed QEMU command line avoids raw image warning. | Peter H. Froehlich | 1 | -1/+1 | |
2016-08-18 | Again, QEMU command line to avoid image warning. | Peter H. Froehlich | 1 | -1/+1 | |
2016-08-13 | hold ptable.lock for the entire process creation | Robert Morris | 1 | -2/+2 | |
however, processes still modify their own p->* without locking | |||||
2015-06-30 | coding style (per Jeremías Feltan <jeremias.feltan@gmail.com>) | Frans Kaashoek | 1 | -1/+1 | |
2014-10-03 | Increase VM memory when running qemu-memfs | Austin Clements | 1 | -1/+1 | |
Presumably because of the pre-loaded file system, the default RAM is insufficient when running kernelmemfs | |||||
2014-10-03 | Make kernelmemfs depend on kernel.ld | Austin Clements | 1 | -1/+1 | |
2014-10-03 | Fix kernelmemfs linking | Austin Clements | 1 | -1/+1 | |
Commit 9aa0337d introduced a linker script for linking the kernel image, but only changed the kernel target to use it. kernelmemfs was still using the old linker command line arguments, which weren't sufficient. | |||||
2014-09-23 | ggdb -> gdwarf-2 for gcc4.8 | Frans Kaashoek | 1 | -1/+1 | |
2014-09-08 | Oops (thanks David Lawrence) | Frans Kaashoek | 1 | -1/+1 | |
2014-07-31 | newer versions of qemu have different binary names (per Joel Nider ↵ | Frans Kaashoek | 1 | -2/+4 | |
<joel@nider.org>) | |||||
2012-10-24 | Prevent extra rebuild of fs.img by keeping intermediate object files. | Cam Tenny | 1 | -0/+6 | |
2012-09-07 | Remove -m32 flag from native gcc compiler | Frans Kaashoek | 1 | -1/+1 | |
But check that mkfs.c is building with LP64 | |||||
2011-09-05 | Re-alphabetize OBJS | Austin Clements | 1 | -1/+1 | |
2011-09-05 | Sync up clean and gitignore better | Austin Clements | 1 | -2/+3 | |
2011-09-04 | kernel depends on kernel.ld | Austin Clements | 1 | -2/+2 | |
2011-09-04 | Add QEMUEXTRA environment to add extra QEMU arguments, like in JOS | Austin Clements | 1 | -1/+1 | |
2011-09-02 | A few missed xv6.pdf dependencies | Austin Clements | 1 | -1/+1 | |
2011-09-02 | Nuke data.S, since we do have a custom linker script. | Austin Clements | 1 | -4/+4 | |
2011-08-15 | Update make clean | Frans Kaashoek | 1 | -1/+1 | |