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| author | Laszlo Ersek <lersek@redhat.com> | 2018-02-01 22:00:40 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2018-04-04 16:43:58 +0200 |
| commit | 8596c140907ebfeabf62427686280666a4e04893 (patch) | |
| tree | ce6325ddc65b0a8187f738cf304abe315c19bb16 /UefiCpuPkg | |
| parent | de4f7f52f2003b854a754e3815f0a0c1c611118f (diff) | |
| download | edk2-8596c140907ebfeabf62427686280666a4e04893.tar.gz edk2-8596c140907ebfeabf62427686280666a4e04893.tar.bz2 edk2-8596c140907ebfeabf62427686280666a4e04893.zip | |
MdePkg/BaseLib: add PatchInstructionX86()
Some edk2 modules generate X86 machine code at module execution time by:
- compiling "template" code with NASM at module build time,
- linking the object code into the module,
- and patching the immediate (constant) operands of some instructions when
the module is executed.
Add a helper function to BaseLib so that the C code performing the
patching is easier to read and maintain.
The implementation in this patch is taken mainly from Mike Kinney's
mailing list messages at
<http://mid.mail-archive.com/E92EE9817A31E24EB0585FDF735412F5B895C360@ORSMSX113.amr.corp.intel.com>,
<http://mid.mail-archive.com/E92EE9817A31E24EB0585FDF735412F5B898BF66@ORSMSX112.amr.corp.intel.com>.
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=866
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Diffstat (limited to 'UefiCpuPkg')
0 files changed, 0 insertions, 0 deletions