Mercurial > pub > dyncall > dyncall
diff dyncallback/dyncall_callback_sparc32.s @ 157:49549739228c
- sparc callback asm and args code (still some stack alignment issues, currently)
- doc improvements for sparc callconv
| author | cslag |
|---|---|
| date | Wed, 28 Dec 2016 16:48:35 -0600 |
| parents | bbefb8b8e74c |
| children | de5ed248757f |
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--- a/dyncallback/dyncall_callback_sparc32.s Fri Nov 25 18:59:26 2016 +0000 +++ b/dyncallback/dyncall_callback_sparc32.s Wed Dec 28 16:48:35 2016 -0600 @@ -29,8 +29,50 @@ $i0+28 -> userdata */ +.text .globl dcCallbackThunkEntry + +/* Called by thunk - thunk stores pointer to DCCallback */ +/* in %g1, and pointer to called function in %g2 */ dcCallbackThunkEntry: - jmpl %i7 + 8, %g0 /* Return from proc. */ + + /* Prolog. */ + /* Frame size of 80b comes from needing storage space for the following: */ + /* DCargs(sparc_req_reg_save_area:64 + argptr:4) + pad:4 + retval:8 */ + save %sp, -80, %sp + + /* Spill register args. */ + st %i0, [ %fp + 68 ] /* reg arg 0 */ + st %i1, [ %fp + 72 ] /* reg arg 1 */ + st %i2, [ %fp + 76 ] /* reg arg 2 */ + st %i3, [ %fp + 80 ] /* reg arg 3 */ + st %i4, [ %fp + 84 ] /* reg arg 4 */ + st %i5, [ %fp + 88 ] /* reg arg 5 */ + add %fp, 68, %l0 + st %l0, [ %sp + 64 ] /* init arg_ptr */ + + /* Zero retval store (for data < word size). */ + st %g0, [ %sp + 72 ] + st %g0, [ %sp + 76 ] + + /* Prepare callback handler call. */ + mov %g1, %o0 /* Param 0 = DCCallback*, %g1 holds ptr to thunk */ + add %sp, 64, %o1 /* Param 1 = DCArgs* (ptr to struct with args ptr */ + add %sp, 72, %o2 /* Param 2 = results ptr to 8b of local stack data */ + ld [ %g1 + 28 ], %o3 /* Param 3 = userdata ptr */ + + ld [ %g1 + 24 ], %l0 + call %l0 nop + /* Put retval in %i0/%i1 (to be in caller's %o0/%o1), and %f0/%f1. */ + ld [ %sp + 72 ], %i0 + ld [ %sp + 76 ], %i1 + ld [ %sp + 72 ], %f0 + ld [ %sp + 76 ], %f1 + + /* Epilog. */ + restore /* unshift reg window */ + retl /* Return from proc. -- jmpl %i7 + 8, %g0 */ + nop +