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Bug 976648 - xptcall port for powerpc64le-linux support. r=froydnj
--HG-- rename : xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc64_linux.s => xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_ppc64_linux.S rename : xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_ppc64_linux.s => xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_ppc64_linux.S
This commit is contained in:
Ulrich Weigand
parent
12e2965bbf
commit
a48be81ee4
@ -214,12 +214,12 @@ if CONFIG['OS_TEST'] == 'powerpc':
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'xptcstubs_ppc_linux.cpp',
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]
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if CONFIG['OS_TEST'] == 'powerpc64':
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if CONFIG['OS_TEST'] in ('powerpc64', 'powerpc64le'):
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if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD'):
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SOURCES += [
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'xptcinvoke_asm_ppc64_linux.s',
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'xptcinvoke_asm_ppc64_linux.S',
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'xptcinvoke_ppc64_linux.cpp',
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'xptcstubs_asm_ppc64_linux.s',
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'xptcstubs_asm_ppc64_linux.S',
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'xptcstubs_ppc64_linux.cpp',
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]
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@ -17,12 +17,38 @@
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.set f25,25; .set f26,26; .set f27,27; .set f28,28; .set f29,29
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.set f30,30; .set f31,31
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# The ABI defines a fixed stack frame area of 4 doublewords (ELFv2)
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# or 6 doublewords (ELFv1); the last of these doublewords is used
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# as TOC pointer save area. The fixed area is followed by a parameter
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# save area of 8 doublewords (used for vararg routines), followed
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# by space for parameters passed on the stack.
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#
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# We set STACK_TOC to the offset of the TOC pointer save area, and
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# STACK_PARAMS to the offset of the first on-stack parameter.
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#if _CALL_ELF == 2
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#define STACK_TOC 24
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#define STACK_PARAMS 96
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#else
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#define STACK_TOC 40
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#define STACK_PARAMS 112
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#endif
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#
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# NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
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# uint32_t paramCount, nsXPTCVariant* params)
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#
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#if _CALL_ELF == 2
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.section ".text"
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.type NS_InvokeByIndex,@function
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.globl NS_InvokeByIndex
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.align 2
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NS_InvokeByIndex:
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0: addis 2,12,(.TOC.-0b)@ha
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addi 2,2,(.TOC.-0b)@l
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.localentry NS_InvokeByIndex,.-NS_InvokeByIndex
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#else
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.section ".toc","aw"
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.section ".text"
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.align 2
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@ -34,6 +60,7 @@ NS_InvokeByIndex:
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.previous
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.type NS_InvokeByIndex,@function
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.NS_InvokeByIndex:
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#endif
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mflr 0
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std 0,16(r1)
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@ -50,13 +77,12 @@ NS_InvokeByIndex:
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# we don't actually need stack space for those. We must ensure
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# that the stack remains 16-byte aligned.
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#
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# | ..128-byte stack frame.. | | 7 GP | 13 FP | 3 NV |
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# | |(params)........| regs | regs | regs |
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# (r1)...........(+112)....(+128)
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# (-23*8).(-16*8).(-3*8)..(r31)
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# | (fixed area + | | 7 GP | 13 FP | 3 NV |
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# | param. save) |(params)........| regs | regs | regs |
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# (r1)......(+STACK_PARAMS)... (-23*8).(-16*8).(-3*8)..(r31)
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# +stack frame, -unused stack params, +regs storage, +1 for alignment
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addi r7,r5,((112/8)-7+7+13+3+1)
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addi r7,r5,((STACK_PARAMS/8)-7+7+13+3+1)
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rldicr r7,r7,3,59 # multiply by 8 and mask with ~15
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neg r7,r7
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stdux r1,r1,r7
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@ -67,12 +93,13 @@ NS_InvokeByIndex:
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# uint64_t* d))
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# r5, r6 are passed through intact (paramCount, params)
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# r7 (d) has to be r1+112 -- where parameters are passed on the stack.
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# r7 (d) has to be r1+STACK_PARAMS
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# -- where parameters are passed on the stack.
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# r3, r4 are above that, easier to address from r31 than from r1
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subi r3,r31,(23*8) # r3 --> GPRS
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subi r4,r31,(16*8) # r4 --> FPRS
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addi r7,r1,112 # r7 --> params
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addi r7,r1,STACK_PARAMS # r7 --> params
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bl invoke_copy_to_stack
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nop
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@ -83,14 +110,18 @@ NS_InvokeByIndex:
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sldi r30,r30,3 # Find function descriptor
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add r9,r9,r30
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ld r9,0(r9)
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ld r12,0(r9)
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ld r0,0(r9) # Actual address from fd.
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std r2,40(r1) # Save r2 (TOC pointer)
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std r2,STACK_TOC(r1) # Save r2 (TOC pointer)
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#if _CALL_ELF == 2
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mtctr r12
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#else
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ld r0,0(r12) # Actual address from fd.
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mtctr 0
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ld r11,16(r9) # Environment pointer from fd.
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ld r2,8(r9) # TOC pointer from fd.
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ld r11,16(r12) # Environment pointer from fd.
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ld r2,8(r12) # TOC pointer from fd.
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#endif
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# Load FP and GP registers as required
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ld r4, -(23*8)(r31)
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@ -117,7 +148,7 @@ NS_InvokeByIndex:
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bctrl # Do it
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ld r2,40(r1) # Load our own TOC pointer
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ld r2,STACK_TOC(r1) # Load our own TOC pointer
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ld r1,0(r1) # Revert stack frame
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ld 0,16(r1) # Reload lr
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ld 29,-24(r1) # Restore NVGPRS
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@ -126,7 +157,11 @@ NS_InvokeByIndex:
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mtlr 0
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blr
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#if _CALL_ELF == 2
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.size NS_InvokeByIndex,.-NS_InvokeByIndex
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#else
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.size NS_InvokeByIndex,.-.NS_InvokeByIndex
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#endif
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# Magic indicating no need for an executable stack
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.section .note.GNU-stack, "", @progbits ; .previous
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@ -74,7 +74,9 @@ invoke_copy_to_stack(uint64_t* gpregs,
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fpregs[i] = s->val.f; // if passed in registers, floats are promoted to doubles
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} else {
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float *p = (float *)d;
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#ifndef __LITTLE_ENDIAN__
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p++;
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#endif
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*p = s->val.f;
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}
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}
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@ -17,6 +17,27 @@
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.set f25,25; .set f26,26; .set f27,27; .set f28,28; .set f29,29
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.set f30,30; .set f31,31
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#if _CALL_ELF == 2
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#define STACK_PARAMS 96
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#else
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#define STACK_PARAMS 112
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#endif
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#if _CALL_ELF == 2
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.section ".text"
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.type SharedStub,@function
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.globl SharedStub
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# Make the symbol hidden so that the branch from the stub does
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# not go via a PLT. This is not only better for performance,
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# but may be necessary to avoid linker errors since there is
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# no place to restore the TOC register in a sibling call.
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.hidden SharedStub
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.align 2
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SharedStub:
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0: addis 2,12,(.TOC.-0b)@ha
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addi 2,2,(.TOC.-0b)@l
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.localentry SharedStub,.-SharedStub
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#else
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.section ".text"
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.align 2
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.globl SharedStub
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@ -34,6 +55,7 @@ SharedStub:
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.type SharedStub,@function
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.SharedStub:
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#endif
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mflr r0
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std r4, -56(r1) # Save all GPRS
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@ -60,7 +82,7 @@ SharedStub:
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subi r6,r1,56 # r6 --> gprData
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subi r7,r1,160 # r7 --> fprData
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addi r5,r1,112 # r5 --> extra stack args
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addi r5,r1,STACK_PARAMS # r5 --> extra stack args
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std r0, 16(r1)
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@ -80,7 +102,11 @@ SharedStub:
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mtlr r0
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blr
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#if _CALL_ELF == 2
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.size SharedStub,.-SharedStub
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#else
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.size SharedStub,.-.SharedStub
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#endif
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# Magic indicating no need for an executable stack
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.section .note.GNU-stack, "", @progbits ; .previous
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@ -83,7 +83,9 @@ PrepareAndDispatch(nsXPTCStubBase* self,
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dp->val.f = (float) fprData[i]; // in registers floats are passed as doubles
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else {
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float *p = (float *)ap;
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#ifndef __LITTLE_ENDIAN__
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p++;
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#endif
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dp->val.f = *p;
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}
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} else { /* integer type or pointer */
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@ -153,6 +155,43 @@ PrepareAndDispatch(nsXPTCStubBase* self,
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// etc.
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// Use assembler directives to get the names right...
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#if _CALL_ELF == 2
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# define STUB_ENTRY(n) \
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__asm__ ( \
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".section \".text\" \n\t" \
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".align 2 \n\t" \
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".if "#n" < 10 \n\t" \
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".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
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"0: addis 2,12,.TOC.-0b@ha \n\t" \
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"addi 2,2,.TOC.-0b@l \n\t" \
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".localentry _ZN14nsXPTCStubBase5Stub"#n"Ev,.-_ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
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\
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".elseif "#n" < 100 \n\t" \
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".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
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"0: addis 2,12,.TOC.-0b@ha \n\t" \
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"addi 2,2,.TOC.-0b@l \n\t" \
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".localentry _ZN14nsXPTCStubBase6Stub"#n"Ev,.-_ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
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\
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".elseif "#n" < 1000 \n\t" \
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".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
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".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
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"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
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"0: addis 2,12,.TOC.-0b@ha \n\t" \
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"addi 2,2,.TOC.-0b@l \n\t" \
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".localentry _ZN14nsXPTCStubBase7Stub"#n"Ev,.-_ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
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\
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".else \n\t" \
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".err \"stub number "#n" >= 1000 not yet supported\"\n" \
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".endif \n\t" \
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\
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"li 11,"#n" \n\t" \
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"b SharedStub \n" \
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);
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#else
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# define STUB_ENTRY(n) \
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__asm__ ( \
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".section \".toc\",\"aw\" \n\t" \
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@ -195,6 +234,7 @@ __asm__ ( \
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"li 11,"#n" \n\t" \
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"b SharedStub \n" \
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);
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#endif
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#define SENTINEL_ENTRY(n) \
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nsresult nsXPTCStubBase::Sentinel##n() \
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