xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc_linux.S@b8a032363ba2 (annotated)
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc_linux.S
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | // -*- Mode: Asm -*- |
| michael@0 | 2 | // |
| michael@0 | 3 | // This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | // License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | // file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| michael@0 | 6 | |
| michael@0 | 7 | .set r0,0; .set sp,1; .set RTOC,2; .set r3,3; .set r4,4 |
| michael@0 | 8 | .set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9 |
| michael@0 | 9 | .set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14 |
| michael@0 | 10 | .set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19 |
| michael@0 | 11 | .set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24 |
| michael@0 | 12 | .set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29 |
| michael@0 | 13 | .set r30,30; .set r31,31 |
| michael@0 | 14 | .set f0,0; .set f1,1; .set f2,2; .set f3,3; .set f4,4 |
| michael@0 | 15 | .set f5,5; .set f6,6; .set f7,7; .set f8,8; .set f9,9 |
| michael@0 | 16 | .set f10,10; .set f11,11; .set f12,12; .set f13,13; .set f14,14 |
| michael@0 | 17 | .set f15,15; .set f16,16; .set f17,17; .set f18,18; .set f19,19 |
| michael@0 | 18 | .set f20,20; .set f21,21; .set f22,22; .set f23,23; .set f24,24 |
| michael@0 | 19 | .set f25,25; .set f26,26; .set f27,27; .set f28,28; .set f29,29 |
| michael@0 | 20 | .set f30,30; .set f31,31 |
| michael@0 | 21 | |
| michael@0 | 22 | .section ".text" |
| michael@0 | 23 | .align 2 |
| michael@0 | 24 | .globl NS_InvokeByIndex |
| michael@0 | 25 | .type NS_InvokeByIndex,@function |
| michael@0 | 26 | |
| michael@0 | 27 | // |
| michael@0 | 28 | // NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, |
| michael@0 | 29 | // uint32_t paramCount, nsXPTCVariant* params) |
| michael@0 | 30 | // |
| michael@0 | 31 | |
| michael@0 | 32 | NS_InvokeByIndex: |
| michael@0 | 33 | stwu sp,-32(sp) // setup standard stack frame |
| michael@0 | 34 | mflr r0 // save LR |
| michael@0 | 35 | stw r3,8(sp) // r3 <= that |
| michael@0 | 36 | stw r4,12(sp) // r4 <= methodIndex |
| michael@0 | 37 | stw r30,16(sp) |
| michael@0 | 38 | stw r31,20(sp) |
| michael@0 | 39 | |
| michael@0 | 40 | stw r0,36(sp) // store LR backchain |
| michael@0 | 41 | mr r31,sp |
| michael@0 | 42 | |
| michael@0 | 43 | rlwinm r10,r5,3,0,27 // r10 = (ParamCount * 2 * 4) & ~0x0f |
| michael@0 | 44 | addi r0,r10,96 // reserve stack for GPR and FPR register save area r0 = r10 + 96 |
| michael@0 | 45 | lwz r9,0(sp) // r9 = backchain |
| michael@0 | 46 | neg r0,r0 |
| michael@0 | 47 | stwux r9,sp,r0 // reserve stack space and save SP backchain |
| michael@0 | 48 | |
| michael@0 | 49 | addi r3,sp,8 // r3 <= args |
| michael@0 | 50 | mr r4,r5 // r4 <= paramCount |
| michael@0 | 51 | mr r5,r6 // r5 <= params |
| michael@0 | 52 | add r6,r3,r10 // r6 <= gpregs ( == args + r10 ) |
| michael@0 | 53 | mr r30,r6 // store in r30 for use later... |
| michael@0 | 54 | #ifndef __NO_FPRS__ |
| michael@0 | 55 | addi r7,r6,32 // r7 <= fpregs ( == gpregs + 32 ) |
| michael@0 | 56 | #else |
| michael@0 | 57 | li r7, 0 |
| michael@0 | 58 | #endif |
| michael@0 | 59 | |
| michael@0 | 60 | bl invoke_copy_to_stack@local // (args, paramCount, params, gpregs, fpregs) |
| michael@0 | 61 | #ifndef __NO_FPRS__ |
| michael@0 | 62 | lfd f1,32(r30) // load FP registers with method parameters |
| michael@0 | 63 | lfd f2,40(r30) |
| michael@0 | 64 | lfd f3,48(r30) |
| michael@0 | 65 | lfd f4,56(r30) |
| michael@0 | 66 | lfd f5,64(r30) |
| michael@0 | 67 | lfd f6,72(r30) |
| michael@0 | 68 | lfd f7,80(r30) |
| michael@0 | 69 | lfd f8,88(r30) |
| michael@0 | 70 | #endif |
| michael@0 | 71 | lwz r3,8(r31) // r3 <= that |
| michael@0 | 72 | lwz r4,12(r31) // r4 <= methodIndex |
| michael@0 | 73 | lwz r5,0(r3) // r5 <= vtable ( == *that ) |
| michael@0 | 74 | slwi r4,r4,2 // convert to offset ( *= 4 ) |
| michael@0 | 75 | lwzx r0,r5,r4 // r0 <= methodpointer ( == vtable + offset ) |
| michael@0 | 76 | |
| michael@0 | 77 | lwz r4,4(r30) // load GP regs with method parameters |
| michael@0 | 78 | lwz r5,8(r30) |
| michael@0 | 79 | lwz r6,12(r30) |
| michael@0 | 80 | lwz r7,16(r30) |
| michael@0 | 81 | lwz r8,20(r30) |
| michael@0 | 82 | lwz r9,24(r30) |
| michael@0 | 83 | lwz r10,28(r30) |
| michael@0 | 84 | |
| michael@0 | 85 | mtlr r0 // copy methodpointer to LR |
| michael@0 | 86 | blrl // call method |
| michael@0 | 87 | |
| michael@0 | 88 | lwz r30,16(r31) // restore r30 & r31 |
| michael@0 | 89 | lwz r31,20(r31) |
| michael@0 | 90 | |
| michael@0 | 91 | lwz r11,0(sp) // clean up the stack |
| michael@0 | 92 | lwz r0,4(r11) |
| michael@0 | 93 | mtlr r0 |
| michael@0 | 94 | mr sp,r11 |
| michael@0 | 95 | blr |
| michael@0 | 96 | |
| michael@0 | 97 | /* Magic indicating no need for an executable stack */ |
| michael@0 | 98 | .section .note.GNU-stack, "", @progbits ; .previous |
