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PPC: Handle stack growth on return to C.

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Mike Pall 2010-09-01 00:25:35 +02:00
parent d71bd78b8f
commit d67eb4de49
1 changed files with 14 additions and 1 deletions
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15
src/buildvm_ppc.dasc
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@ -329,7 +329,20 @@ static void build_subroutines(BuildCtx *ctx)
| b <3 | b <3
| |
|8: // Corner case: need to grow stack for filling up results. |8: // Corner case: need to grow stack for filling up results.
| NYI | // This can happen if:
| // - A C function grows the stack (a lot).
| // - The GC shrinks the stack in between.
| // - A return back from a lua_call() with (high) nresults adjustment.
| stw BASE, L->top // Save current top held in BASE (yes).
| mr SAVE0, RD
| mr CARG2, TMP2
| mr CARG1, L
| bl extern lj_state_growstack // (lua_State *L, int n)
| lwz TMP2, SAVE_NRES
| mr RD, SAVE0
| slwi TMP2, TMP2, 3
| lwz BASE, L->top // Need the (realloced) L->top in BASE.
| b <2
| |
|->vm_unwind_c: // Unwind C stack, return from vm_pcall. |->vm_unwind_c: // Unwind C stack, return from vm_pcall.
| NYI | NYI