diff options
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_ppc64_linux.S')
| -rw-r--r-- | xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_ppc64_linux.S | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_ppc64_linux.S b/xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_ppc64_linux.S new file mode 100644 index 0000000000..d2cab6c813 --- /dev/null +++ b/xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_ppc64_linux.S @@ -0,0 +1,167 @@ +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +.set r0,0; .set r1,1; .set r2,2; .set r3,3; .set r4,4 +.set r5,5; .set r6,6; .set r7,7; .set r8,8; .set r9,9 +.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14 +.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19 +.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24 +.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29 +.set r30,30; .set r31,31 +.set f0,0; .set f1,1; .set f2,2; .set f3,3; .set f4,4 +.set f5,5; .set f6,6; .set f7,7; .set f8,8; .set f9,9 +.set f10,10; .set f11,11; .set f12,12; .set f13,13; .set f14,14 +.set f15,15; .set f16,16; .set f17,17; .set f18,18; .set f19,19 +.set f20,20; .set f21,21; .set f22,22; .set f23,23; .set f24,24 +.set f25,25; .set f26,26; .set f27,27; .set f28,28; .set f29,29 +.set f30,30; .set f31,31 + +# The ABI defines a fixed stack frame area of 4 doublewords (ELFv2) +# or 6 doublewords (ELFv1); the last of these doublewords is used +# as TOC pointer save area. The fixed area is followed by a parameter +# save area of 8 doublewords (used for vararg routines), followed +# by space for parameters passed on the stack. +# +# We set STACK_TOC to the offset of the TOC pointer save area, and +# STACK_PARAMS to the offset of the first on-stack parameter. + +#if _CALL_ELF == 2 +#define STACK_TOC 24 +#define STACK_PARAMS 96 +#else +#define STACK_TOC 40 +#define STACK_PARAMS 112 +#endif + +# +# NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, +# uint32_t paramCount, nsXPTCVariant* params) +# + +#if _CALL_ELF == 2 + .section ".text" + .type NS_InvokeByIndex,@function + .globl NS_InvokeByIndex + .align 2 +NS_InvokeByIndex: +0: addis 2,12,(.TOC.-0b)@ha + addi 2,2,(.TOC.-0b)@l + .localentry NS_InvokeByIndex,.-NS_InvokeByIndex +#else + .section ".toc","aw" + .section ".text" + .align 2 + .globl NS_InvokeByIndex + .section ".opd","aw" + .align 3 +NS_InvokeByIndex: + .quad .NS_InvokeByIndex,.TOC.@tocbase + .previous + .type NS_InvokeByIndex,@function +.NS_InvokeByIndex: +#endif + mflr 0 + std 0,16(r1) + + std r29,-24(r1) + std r30,-16(r1) + std r31,-8(r1) + + mr r29,r3 # Save 'that' in r29 + mr r30,r4 # Save 'methodIndex' in r30 + mr r31,r1 # Save old frame + + # Allocate stack frame with space for params. Since at least the + # first 7 parameters (not including 'that') will be in registers, + # we don't actually need stack space for those. We must ensure + # that the stack remains 16-byte aligned. + # + # | (fixed area + | | 7 GP | 13 FP | 3 NV | + # | param. save) |(params)........| regs | regs | regs | + # (r1)......(+STACK_PARAMS)... (-23*8).(-16*8).(-3*8)..(r31) + + # +stack frame, -unused stack params, +regs storage, +1 for alignment + addi r7,r5,((STACK_PARAMS/8)-7+7+13+3+1) + rldicr r7,r7,3,59 # multiply by 8 and mask with ~15 + neg r7,r7 + stdux r1,r1,r7 + + + # Call invoke_copy_to_stack(uint64_t* gpregs, double* fpregs, + # uint32_t paramCount, nsXPTCVariant* s, + # uint64_t* d)) + + # r5, r6 are passed through intact (paramCount, params) + # r7 (d) has to be r1+STACK_PARAMS + # -- where parameters are passed on the stack. + # r3, r4 are above that, easier to address from r31 than from r1 + + subi r3,r31,(23*8) # r3 --> GPRS + subi r4,r31,(16*8) # r4 --> FPRS + addi r7,r1,STACK_PARAMS # r7 --> params + bl invoke_copy_to_stack + nop + + # Set up to invoke function + + ld r9,0(r29) # vtable (r29 is 'that') + mr r3,r29 # self is first arg, obviously + + sldi r30,r30,3 # Find function descriptor + add r9,r9,r30 + ld r12,0(r9) + + std r2,STACK_TOC(r1) # Save r2 (TOC pointer) + +#if _CALL_ELF == 2 + mtctr r12 +#else + ld r0,0(r12) # Actual address from fd. + mtctr 0 + ld r11,16(r12) # Environment pointer from fd. + ld r2,8(r12) # TOC pointer from fd. +#endif + + # Load FP and GP registers as required + ld r4, -(23*8)(r31) + ld r5, -(22*8)(r31) + ld r6, -(21*8)(r31) + ld r7, -(20*8)(r31) + ld r8, -(19*8)(r31) + ld r9, -(18*8)(r31) + ld r10, -(17*8)(r31) + + lfd f1, -(16*8)(r31) + lfd f2, -(15*8)(r31) + lfd f3, -(14*8)(r31) + lfd f4, -(13*8)(r31) + lfd f5, -(12*8)(r31) + lfd f6, -(11*8)(r31) + lfd f7, -(10*8)(r31) + lfd f8, -(9*8)(r31) + lfd f9, -(8*8)(r31) + lfd f10, -(7*8)(r31) + lfd f11, -(6*8)(r31) + lfd f12, -(5*8)(r31) + lfd f13, -(4*8)(r31) + + bctrl # Do it + + ld r2,STACK_TOC(r1) # Load our own TOC pointer + ld r1,0(r1) # Revert stack frame + ld 0,16(r1) # Reload lr + mtlr 0 + ld 29,-24(r1) # Restore NVGPRS + ld 30,-16(r1) + ld 31,-8(r1) + blr + +#if _CALL_ELF == 2 + .size NS_InvokeByIndex,.-NS_InvokeByIndex +#else + .size NS_InvokeByIndex,.-.NS_InvokeByIndex +#endif + + # Magic indicating no need for an executable stack + .section .note.GNU-stack, "", @progbits |