michael@0: # This Source Code Form is subject to the terms of the Mozilla Public michael@0: # License, v. 2.0. If a copy of the MPL was not distributed with this michael@0: # file, You can obtain one at http://mozilla.org/MPL/2.0/. michael@0: michael@0: .set r0,0; .set r1,1; .set r2,2; .set r3,3; .set r4,4 michael@0: .set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9 michael@0: .set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14 michael@0: .set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19 michael@0: .set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24 michael@0: .set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29 michael@0: .set r30,30; .set r31,31 michael@0: .set f0,0; .set f1,1; .set f2,2; .set f3,3; .set f4,4 michael@0: .set f5,5; .set f6,6; .set f7,7; .set f8,8; .set f9,9 michael@0: .set f10,10; .set f11,11; .set f12,12; .set f13,13; .set f14,14 michael@0: .set f15,15; .set f16,16; .set f17,17; .set f18,18; .set f19,19 michael@0: .set f20,20; .set f21,21; .set f22,22; .set f23,23; .set f24,24 michael@0: .set f25,25; .set f26,26; .set f27,27; .set f28,28; .set f29,29 michael@0: .set f30,30; .set f31,31 michael@0: michael@0: # The ABI defines a fixed stack frame area of 4 doublewords (ELFv2) michael@0: # or 6 doublewords (ELFv1); the last of these doublewords is used michael@0: # as TOC pointer save area. The fixed area is followed by a parameter michael@0: # save area of 8 doublewords (used for vararg routines), followed michael@0: # by space for parameters passed on the stack. michael@0: # michael@0: # We set STACK_TOC to the offset of the TOC pointer save area, and michael@0: # STACK_PARAMS to the offset of the first on-stack parameter. michael@0: michael@0: #if _CALL_ELF == 2 michael@0: #define STACK_TOC 24 michael@0: #define STACK_PARAMS 96 michael@0: #else michael@0: #define STACK_TOC 40 michael@0: #define STACK_PARAMS 112 michael@0: #endif michael@0: michael@0: # michael@0: # NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, michael@0: # uint32_t paramCount, nsXPTCVariant* params) michael@0: # michael@0: michael@0: #if _CALL_ELF == 2 michael@0: .section ".text" michael@0: .type NS_InvokeByIndex,@function michael@0: .globl NS_InvokeByIndex michael@0: .align 2 michael@0: NS_InvokeByIndex: michael@0: 0: addis 2,12,(.TOC.-0b)@ha michael@0: addi 2,2,(.TOC.-0b)@l michael@0: .localentry NS_InvokeByIndex,.-NS_InvokeByIndex michael@0: #else michael@0: .section ".toc","aw" michael@0: .section ".text" michael@0: .align 2 michael@0: .globl NS_InvokeByIndex michael@0: .section ".opd","aw" michael@0: .align 3 michael@0: NS_InvokeByIndex: michael@0: .quad .NS_InvokeByIndex,.TOC.@tocbase michael@0: .previous michael@0: .type NS_InvokeByIndex,@function michael@0: .NS_InvokeByIndex: michael@0: #endif michael@0: mflr 0 michael@0: std 0,16(r1) michael@0: michael@0: std r29,-24(r1) michael@0: std r30,-16(r1) michael@0: std r31,-8(r1) michael@0: michael@0: mr r29,r3 # Save 'that' in r29 michael@0: mr r30,r4 # Save 'methodIndex' in r30 michael@0: mr r31,r1 # Save old frame michael@0: michael@0: # Allocate stack frame with space for params. Since at least the michael@0: # first 7 parameters (not including 'that') will be in registers, michael@0: # we don't actually need stack space for those. We must ensure michael@0: # that the stack remains 16-byte aligned. michael@0: # michael@0: # | (fixed area + | | 7 GP | 13 FP | 3 NV | michael@0: # | param. save) |(params)........| regs | regs | regs | michael@0: # (r1)......(+STACK_PARAMS)... (-23*8).(-16*8).(-3*8)..(r31) michael@0: michael@0: # +stack frame, -unused stack params, +regs storage, +1 for alignment michael@0: addi r7,r5,((STACK_PARAMS/8)-7+7+13+3+1) michael@0: rldicr r7,r7,3,59 # multiply by 8 and mask with ~15 michael@0: neg r7,r7 michael@0: stdux r1,r1,r7 michael@0: michael@0: michael@0: # Call invoke_copy_to_stack(uint64_t* gpregs, double* fpregs, michael@0: # uint32_t paramCount, nsXPTCVariant* s, michael@0: # uint64_t* d)) michael@0: michael@0: # r5, r6 are passed through intact (paramCount, params) michael@0: # r7 (d) has to be r1+STACK_PARAMS michael@0: # -- where parameters are passed on the stack. michael@0: # r3, r4 are above that, easier to address from r31 than from r1 michael@0: michael@0: subi r3,r31,(23*8) # r3 --> GPRS michael@0: subi r4,r31,(16*8) # r4 --> FPRS michael@0: addi r7,r1,STACK_PARAMS # r7 --> params michael@0: bl invoke_copy_to_stack michael@0: nop michael@0: michael@0: # Set up to invoke function michael@0: michael@0: ld r9,0(r29) # vtable (r29 is 'that') michael@0: mr r3,r29 # self is first arg, obviously michael@0: michael@0: sldi r30,r30,3 # Find function descriptor michael@0: add r9,r9,r30 michael@0: ld r12,0(r9) michael@0: michael@0: std r2,STACK_TOC(r1) # Save r2 (TOC pointer) michael@0: michael@0: #if _CALL_ELF == 2 michael@0: mtctr r12 michael@0: #else michael@0: ld r0,0(r12) # Actual address from fd. michael@0: mtctr 0 michael@0: ld r11,16(r12) # Environment pointer from fd. michael@0: ld r2,8(r12) # TOC pointer from fd. michael@0: #endif michael@0: michael@0: # Load FP and GP registers as required michael@0: ld r4, -(23*8)(r31) michael@0: ld r5, -(22*8)(r31) michael@0: ld r6, -(21*8)(r31) michael@0: ld r7, -(20*8)(r31) michael@0: ld r8, -(19*8)(r31) michael@0: ld r9, -(18*8)(r31) michael@0: ld r10, -(17*8)(r31) michael@0: michael@0: lfd f1, -(16*8)(r31) michael@0: lfd f2, -(15*8)(r31) michael@0: lfd f3, -(14*8)(r31) michael@0: lfd f4, -(13*8)(r31) michael@0: lfd f5, -(12*8)(r31) michael@0: lfd f6, -(11*8)(r31) michael@0: lfd f7, -(10*8)(r31) michael@0: lfd f8, -(9*8)(r31) michael@0: lfd f9, -(8*8)(r31) michael@0: lfd f10, -(7*8)(r31) michael@0: lfd f11, -(6*8)(r31) michael@0: lfd f12, -(5*8)(r31) michael@0: lfd f13, -(4*8)(r31) michael@0: michael@0: bctrl # Do it michael@0: michael@0: ld r2,STACK_TOC(r1) # Load our own TOC pointer michael@0: ld r1,0(r1) # Revert stack frame michael@0: ld 0,16(r1) # Reload lr michael@0: ld 29,-24(r1) # Restore NVGPRS michael@0: ld 30,-16(r1) michael@0: ld 31,-8(r1) michael@0: mtlr 0 michael@0: blr michael@0: michael@0: #if _CALL_ELF == 2 michael@0: .size NS_InvokeByIndex,.-NS_InvokeByIndex michael@0: #else michael@0: .size NS_InvokeByIndex,.-.NS_InvokeByIndex michael@0: #endif michael@0: michael@0: # Magic indicating no need for an executable stack michael@0: .section .note.GNU-stack, "", @progbits ; .previous