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* Assimilate ia64 back into the fold with the common freebsd32/ia32 code.peter2003-12-111-1/+6
| | | | | | | | The split-up code is derived from the ia64 code originally. Note that I have only compile-tested this, not actually run-tested it. The ia64 side of the force is missing some significant chunks of signal delivery code.
* Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bitpeter2003-09-251-0/+4
| | | | | | | | | | | | | | | | | | | | | systems where the data/stack/etc limits are too big for a 32 bit process. Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c. Supply an ia32_fixlimits function. Export the clip/default values to sysctl under the compat.ia32 heirarchy. Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max value rather than the sysctl tweakable variable. This allows mmap to place mappings at sensible locations when limits have been reduced. Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same method as mmap(0, ...) now does. Note that we cannot remove all references to the sysctl tweakable maxdsiz etc variables because /etc/login.conf specifies a datasize of 'unlimited'. And that causes exec etc to fail since it can no longer find space to mmap things.
* Initial sweep at dividing up the generic 32bit-on-64bit kernel supportpeter2003-08-221-50/+1
| | | | | | from the ia32 specific stuff. Some of this still needs to move to the MI freebsd32 area, and some needs to move to the MD area. This is still work-in-progress.
* Deal with the user VM space expanding. 32 bit applications do not likepeter2003-05-231-1/+1
| | | | | | | | | having their stack at the 512GB mark. Give 4GB of user VM space for 32 bit apps. Note that this is significantly more than on i386 which gives only about 2.9GB of user VM to a process (1GB for kernel, plus page table pages which eat user VM space). Approved by: re (blanket)
* Add BASIC i386 binary support for the amd64 kernel. This is largelypeter2003-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | stolen from the ia64/ia32 code (indeed there was a repocopy), but I've redone the MD parts and added and fixed a few essential syscalls. It is sufficient to run i386 binaries like /bin/ls, /usr/bin/id (dynamic) and p4. The ia64 code has not implemented signal delivery, so I had to do that. Before you say it, yes, this does need to go in a common place. But we're in a freeze at the moment and I didn't want to risk breaking ia64. I will sort this out after the freeze so that the common code is in a common place. On the AMD64 side, this required adding segment selector context switch support and some other support infrastructure. The %fs/%gs etc code is hairy because loading %gs will clobber the kernel's current MSR_GSBASE setting. The segment selectors are not used by the kernel, so they're only changed at context switch time or when changing modes. This still needs to be optimized. Approved by: re (amd64/* blanket)
* SCARGS removal take II.alfred2002-12-141-5/+0
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* Backout removal SCARGS, the code freeze is only "selectively" over.alfred2002-12-131-0/+5
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* Remove SCARGS.alfred2002-12-131-5/+0
| | | | Reviewed by: md5
* Infrastructure tweaks to allow having both an Elf32 and an Elf64 executablepeter2002-07-201-0/+94
handler in the kernel at the same time. Also, allow for the exec_new_vmspace() code to build a different sized vmspace depending on the executable environment. This is a big help for execing i386 binaries on ia64. The ELF exec code grows the ability to map partial pages when there is a page size difference, eg: emulating 4K pages on 8K or 16K hardware pages. Flesh out the i386 emulation support for ia64. At this point, the only binary that I know of that fails is cvsup, because the cvsup runtime tries to execute code in pages not marked executable. Obtained from: dfr (mostly, many tweaks from me).
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