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Build prof_machdep.c if profiling.

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Kernel profiling for amd64's (normal and high resolution) should now
compile and work as (un)well as on i386's.  It works better than user
profiling because:
- it uses _cyg_profile_func_*() instead of .mcount(), so it doesn't suffer
  from gcc misspelling .mcount as mcount.
- it doesn't neglect saving %rax in .mcount().

The SMP case hasn't been tested.  The high resolution subcase of this uses
the i8254, and as on i386's, the locking for this is deficient and the
i8254 is too inefficient.  The acpi timer is also too inefficient.
This commit is contained in:
Bruce Evans 2004-05-23 18:38:27 +00:00
parent be8282ba22
commit 478fee28e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=129627
1 changed files with 1 additions and 0 deletions
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@ -69,6 +69,7 @@ amd64/amd64/mpboot.S optional smp
amd64/amd64/mptable.c optional mptable
amd64/amd64/mptable_pci.c optional mptable pci
amd64/amd64/nexus.c standard
amd64/amd64/prof_machdep.c optional profiling-routine
amd64/amd64/pmap.c standard
amd64/amd64/sigtramp.S standard
amd64/amd64/support.S standard