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| author | kib <kib@FreeBSD.org> | 2009-04-01 13:09:26 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2009-04-01 13:09:26 +0000 |
| commit | 253f7779bc4142bb2814f0f44999bc0e48e9bbe5 (patch) | |
| tree | b58cda2045e48f43c2d8ff644f3d5c3a859f6e99 /sys/amd64/include/pcb.h | |
| parent | d2c67f9684a76233c58b569abc3a56c24f6a64db (diff) | |
| download | FreeBSD-src-253f7779bc4142bb2814f0f44999bc0e48e9bbe5.zip FreeBSD-src-253f7779bc4142bb2814f0f44999bc0e48e9bbe5.tar.gz | |
Save and restore segment registers on amd64 when entering and leaving
the kernel on amd64. Fill and read segment registers for mcontext and
signals. Handle traps caused by restoration of the
invalidated selectors.
Implement user-mode creation and manipulation of the process-specific
LDT descriptors for amd64, see sysarch(2).
Implement support for TSS i/o port access permission bitmap for amd64.
Context-switch LDT and TSS. Do not save and restore segment registers on
the context switch, that is handled by kernel enter/leave trampolines
now. Remove segment restore code from the signal trampolines for
freebsd/amd64, freebsd/ia32 and linux/i386 for the same reason.
Implement amd64-specific compat shims for sysarch.
Linuxolator (temporary ?) switched to use gsbase for thread_area pointer.
TODO:
Currently, gdb is not adapted to show segment registers from struct reg.
Also, no machine-depended ptrace command is added to set segment
registers for debugged process.
In collaboration with: pho
Discussed with: peter
Reviewed by: jhb
Linuxolator tested by: dchagin
Diffstat (limited to 'sys/amd64/include/pcb.h')
| -rw-r--r-- | sys/amd64/include/pcb.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/sys/amd64/include/pcb.h b/sys/amd64/include/pcb.h index 2e2ca87..39ca832 100644 --- a/sys/amd64/include/pcb.h +++ b/sys/amd64/include/pcb.h @@ -62,10 +62,6 @@ struct pcb { #define PCB_32BIT 0x40 /* process has 32 bit context (segs etc) */ #define PCB_FULLCTX 0x80 /* full context restore on sysret */ - u_int32_t pcb_ds; - u_int32_t pcb_es; - u_int32_t pcb_fs; - u_int32_t pcb_gs; u_int64_t pcb_dr0; u_int64_t pcb_dr1; u_int64_t pcb_dr2; @@ -80,6 +76,8 @@ struct pcb { /* 32-bit segment descriptor */ struct user_segment_descriptor pcb_gs32sd; + /* local tss, with i/o bitmap; NULL for common */ + struct amd64tss *pcb_tssp; }; struct xpcb { |
