| commit | ac751e4de8b5ae05cb6801bc4c9d1b3249bf3845 | |
| author | Douglas Katzman <dougk@google.com> | |
| Sat, 9 Dec 2017 22:03:45 +0000 (9 17:03 -0500) | ||
| committer | Douglas Katzman <dougk@google.com> | |
| Sat, 9 Dec 2017 22:22:31 +0000 (9 17:22 -0500) | ||
| tree | ca2b8a4cc903eb79fb0562034bacb656d6628684 | treesnapshot (tar.gz zip) |
| parent | 27f2f75b4e1df8364e6c89fd40b5d72f9b83425e | commitdiff |
Apply machine instruction fixups to ELF section code
We sometimes use "MOV RAX, #xADDR; CALL RAX" when calling even though CALL rel
would have worked, as would "LEA RAX, [RIP+k]" to make the MOV self-relocating.
Applying fixups is a more general fix as it allows copying the dynamic space
code into an ELF section. (All calls from dynamic space use the absolute MOV by
necessity and I don't think we should rewrite them in editcore.)
And the stepper requires an absolute MOV which is why that form appears
in immobile code when it otherwise needn't.
We sometimes use "MOV RAX, #xADDR; CALL RAX" when calling even though CALL rel
would have worked, as would "LEA RAX, [RIP+k]" to make the MOV self-relocating.
Applying fixups is a more general fix as it allows copying the dynamic space
code into an ELF section. (All calls from dynamic space use the absolute MOV by
necessity and I don't think we should rewrite them in editcore.)
And the stepper requires an absolute MOV which is why that form appears
in immobile code when it otherwise needn't.
| tools-for-build/editcore.lisp | diffblobblamehistory |