start: A handful of MIPS fixes
#20822
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alexrp
commented
Jul 27, 2024
alexrp
commented
Jul 27, 2024
alexrp
commented
Jul 27, 2024
|
Those are some handy PR review comments. Why not make them code comments, commit messages, or both? |
It's actually important for the ABI that r25 (t9) contains the address of the
called function, so that this standard prologue sequence works:
lui $2, %hi(_gp_disp)
addiu $2, $2, %lo(_gp_disp)
addu $gp, $2, $t9
(This is a bit similar to the ToC situation on powerpc that was fixed in
7bc7896.)
Accesses to this global variable can require relocations on some platforms (e.g. MIPS). If we do it before PIE relocations have been applied, we'll crash.
At this stage, we're not ready to make calls yet on some architectures (e.g. MIPS).
Done. |
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These are required for the changes in #20823 to actually work.