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Bug 963024 - AArch64 support for XPCOM. r=froydnj

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This commit is contained in:
Marcin Juszkiewicz 2014-02-26 13:43:16 -05:00
parent 4d2df383d2
commit 8bc52be8d1
5 changed files with 468 additions and 0 deletions
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7
xpcom/reflect/xptcall/src/md/unix/moz.build
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@ -149,6 +149,13 @@ if CONFIG['OS_ARCH'] == 'NetBSD':
]
if CONFIG['OS_ARCH'] == 'Linux':
if CONFIG['OS_TEST'] == 'aarch64':
SOURCES += [
'xptcinvoke_aarch64.cpp',
'xptcinvoke_asm_aarch64.s',
'xptcstubs_aarch64.cpp',
'xptcstubs_asm_aarch64.s',
]
if CONFIG['OS_TEST'] == 'm68k':
SOURCES += [
'xptcinvoke_linux_m68k.cpp',

136
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_aarch64.cpp Normal file
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@ -0,0 +1,136 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
/* Platform specific code to invoke XPCOM methods on native objects */
#include "xptcprivate.h"
#if !defined(__aarch64__)
#error "This code is for Linux AArch64 only."
#endif
/* "Procedure Call Standard for the ARM 64-bit Architecture" document, sections
* "5.4 Parameter Passing" and "6.1.2 Procedure Calling" contain all the
* needed information.
*
* http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042d/IHI0042D_aapcs.pdf
*/
#ifndef __AARCH64EL__
#error "Only little endian compatibility was tested"
#endif
/*
* Allocation of integer function arguments initially to registers r1-r7
* and then to stack. Handling of 'that' argument which goes to register r0
* is handled separately and does not belong here.
*
* 'ireg_args' - pointer to the current position in the buffer,
* corresponding to the register arguments
* 'stack_args' - pointer to the current position in the buffer,
* corresponding to the arguments on stack
* 'end' - pointer to the end of the registers argument
* buffer.
*/
static inline void alloc_word(uint64_t* &ireg_args,
uint64_t* &stack_args,
uint64_t* end,
uint64_t data)
{
if (ireg_args < end) {
*ireg_args = data;
ireg_args++;
} else {
*stack_args = data;
stack_args++;
}
}
static inline void alloc_double(double* &freg_args,
uint64_t* &stack_args,
double* end,
double data)
{
if (freg_args < end) {
*freg_args = data;
freg_args++;
} else {
memcpy(stack_args, &data, sizeof(data));
stack_args++;
}
}
static inline void alloc_float(double* &freg_args,
uint64_t* &stack_args,
double* end,
float data)
{
if (freg_args < end) {
memcpy(freg_args, &data, sizeof(data));
freg_args++;
} else {
memcpy(stack_args, &data, sizeof(data));
stack_args++;
}
}
extern "C" void
invoke_copy_to_stack(uint64_t* stk, uint64_t *end,
uint32_t paramCount, nsXPTCVariant* s)
{
uint64_t *ireg_args = stk;
uint64_t *ireg_end = ireg_args + 8;
double *freg_args = (double *)ireg_end;
double *freg_end = freg_args + 8;
uint64_t *stack_args = (uint64_t *)freg_end;
// leave room for 'that' argument in x0
++ireg_args;
for (uint32_t i = 0; i < paramCount; i++, s++) {
if (s->IsPtrData()) {
alloc_word(ireg_args, stack_args, ireg_end, (uint64_t)s->ptr);
continue;
}
// According to the ABI, integral types that are smaller than 8 bytes
// are to be passed in 8-byte registers or 8-byte stack slots.
switch (s->type) {
case nsXPTType::T_FLOAT:
alloc_float(freg_args, stack_args, freg_end, s->val.f);
break;
case nsXPTType::T_DOUBLE:
alloc_double(freg_args, stack_args, freg_end, s->val.d);
break;
case nsXPTType::T_I8: alloc_word(ireg_args, stk, end, s->val.i8); break;
case nsXPTType::T_I16: alloc_word(ireg_args, stk, end, s->val.i16); break;
case nsXPTType::T_I32: alloc_word(ireg_args, stk, end, s->val.i32); break;
case nsXPTType::T_I64: alloc_word(ireg_args, stk, end, s->val.i64); break;
case nsXPTType::T_U8: alloc_word(ireg_args, stk, end, s->val.u8); break;
case nsXPTType::T_U16: alloc_word(ireg_args, stk, end, s->val.u16); break;
case nsXPTType::T_U32: alloc_word(ireg_args, stk, end, s->val.u32); break;
case nsXPTType::T_U64: alloc_word(ireg_args, stk, end, s->val.u64); break;
case nsXPTType::T_BOOL: alloc_word(ireg_args, stk, end, s->val.b); break;
case nsXPTType::T_CHAR: alloc_word(ireg_args, stk, end, s->val.c); break;
case nsXPTType::T_WCHAR: alloc_word(ireg_args, stk, end, s->val.wc); break;
default:
// all the others are plain pointer types
alloc_word(ireg_args, stack_args, ireg_end,
reinterpret_cast<uint64_t>(s->val.p));
break;
}
}
}
extern "C" nsresult _NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
uint32_t paramCount, nsXPTCVariant* params);
EXPORT_XPCOM_API(nsresult)
NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
uint32_t paramCount, nsXPTCVariant* params)
{
return _NS_InvokeByIndex(that, methodIndex, paramCount, params);
}

67
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_aarch64.s Normal file
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@ -0,0 +1,67 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
.section ".text"
.globl _NS_InvokeByIndex
.type _NS_InvokeByIndex,@function
/*
* _NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
* uint32_t paramCount, nsXPTCVariant* params)
*/
_NS_InvokeByIndex:
# set up frame
stp x29, x30, [sp,#-32]!
mov x29, sp
stp x19, x20, [sp,#16]
# save methodIndex across function calls
mov w20, w1
# end of stack area passed to invoke_copy_to_stack
mov x1, sp
# assume 8 bytes of stack for each argument with 16-byte alignment
add w19, w2, #1
and w19, w19, #0xfffffffe
sub sp, sp, w19, uxth #3
# temporary place to store args passed in r0-r7,v0-v7
sub sp, sp, #128
# save 'that' on stack
str x0, [sp]
# start of stack area passed to invoke_copy_to_stack
mov x0, sp
bl invoke_copy_to_stack
# load arguments passed in r0-r7
ldp x6, x7, [sp, #48]
ldp x4, x5, [sp, #32]
ldp x2, x3, [sp, #16]
ldp x0, x1, [sp],#64
# load arguments passed in v0-v7
ldp d6, d7, [sp, #48]
ldp d4, d5, [sp, #32]
ldp d2, d3, [sp, #16]
ldp d0, d1, [sp],#64
# call the method
ldr x16, [x0]
add x16, x16, w20, uxth #3
ldr x16, [x16]
blr x16
add sp, sp, w19, uxth #3
ldp x19, x20, [sp,#16]
ldp x29, x30, [sp],#32
ret
.size _NS_InvokeByIndex, . - _NS_InvokeByIndex

219
xpcom/reflect/xptcall/src/md/unix/xptcstubs_aarch64.cpp Normal file
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@ -0,0 +1,219 @@
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */
#include "xptcprivate.h"
#include "xptiprivate.h"
#ifndef __AARCH64EL__
#error "Only little endian compatibility was tested"
#endif
/*
* This is for AArch64 ABI
*
* When we're called, the "gp" registers are stored in gprData and
* the "fp" registers are stored in fprData. Each array has 8 regs
* but first reg in gprData is a placeholder for 'self'.
*/
extern "C" nsresult
PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
uint64_t *gprData, double *fprData)
{
#define PARAM_BUFFER_COUNT 16
#define PARAM_GPR_COUNT 8
#define PARAM_FPR_COUNT 8
nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
nsXPTCMiniVariant* dispatchParams = NULL;
const nsXPTMethodInfo* info;
nsresult result = NS_ERROR_FAILURE;
NS_ASSERTION(self,"no self");
self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
NS_ASSERTION(info,"no method info");
uint32_t paramCount = info->GetParamCount();
// setup variant array pointer
if (paramCount > PARAM_BUFFER_COUNT) {
dispatchParams = new nsXPTCMiniVariant[paramCount];
} else {
dispatchParams = paramBuffer;
}
NS_ASSERTION(dispatchParams,"no place for params");
uint64_t* ap = args;
uint32_t next_gpr = 1; // skip first arg which is 'self'
uint32_t next_fpr = 0;
for (uint32_t i = 0; i < paramCount; i++) {
const nsXPTParamInfo& param = info->GetParam(i);
const nsXPTType& type = param.GetType();
nsXPTCMiniVariant* dp = &dispatchParams[i];
if (param.IsOut() || !type.IsArithmetic()) {
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.p = (void*)gprData[next_gpr++];
} else {
dp->val.p = (void*)*ap++;
}
continue;
}
switch (type) {
case nsXPTType::T_I8:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i8 = (int8_t)gprData[next_gpr++];
} else {
dp->val.i8 = (int8_t)*ap++;
}
break;
case nsXPTType::T_I16:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i16 = (int16_t)gprData[next_gpr++];
} else {
dp->val.i16 = (int16_t)*ap++;
}
break;
case nsXPTType::T_I32:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i32 = (int32_t)gprData[next_gpr++];
} else {
dp->val.i32 = (int32_t)*ap++;
}
break;
case nsXPTType::T_I64:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i64 = (int64_t)gprData[next_gpr++];
} else {
dp->val.i64 = (int64_t)*ap++;
}
break;
case nsXPTType::T_U8:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u8 = (uint8_t)gprData[next_gpr++];
} else {
dp->val.u8 = (uint8_t)*ap++;
}
break;
case nsXPTType::T_U16:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u16 = (uint16_t)gprData[next_gpr++];
} else {
dp->val.u16 = (uint16_t)*ap++;
}
break;
case nsXPTType::T_U32:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u32 = (uint32_t)gprData[next_gpr++];
} else {
dp->val.u32 = (uint32_t)*ap++;
}
break;
case nsXPTType::T_U64:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u64 = (uint64_t)gprData[next_gpr++];
} else {
dp->val.u64 = (uint64_t)*ap++;
}
break;
case nsXPTType::T_FLOAT:
if (next_fpr < PARAM_FPR_COUNT) {
memcpy(&dp->val.f, &fprData[next_fpr++], sizeof(dp->val.f));
} else {
memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
}
break;
case nsXPTType::T_DOUBLE:
if (next_fpr < PARAM_FPR_COUNT) {
memcpy(&dp->val.d, &fprData[next_fpr++], sizeof(dp->val.d));
} else {
memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
}
break;
case nsXPTType::T_BOOL:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.b = (bool)gprData[next_gpr++];
} else {
dp->val.b = (bool)*ap++;
}
break;
case nsXPTType::T_CHAR:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.c = (char)gprData[next_gpr++];
} else {
dp->val.c = (char)*ap++;
}
break;
case nsXPTType::T_WCHAR:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.wc = (wchar_t)gprData[next_gpr++];
} else {
dp->val.wc = (wchar_t)*ap++;
}
break;
default:
NS_ASSERTION(0, "bad type");
break;
}
}
result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
if (dispatchParams != paramBuffer) {
delete [] dispatchParams;
}
return result;
}
// Load w17 with the constant 'n' and branch to SharedStub().
# define STUB_ENTRY(n) \
__asm__ ( \
".section \".text\" \n\t" \
".align 2\n\t" \
".if "#n" < 10 \n\t" \
".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
".elseif "#n" < 100 \n\t" \
".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
".elseif "#n" < 1000 \n\t" \
".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
".else \n\t" \
".err \"stub number "#n" >= 1000 not yet supported\"\n" \
".endif \n\t" \
"mov w17,#"#n" \n\t" \
"b SharedStub \n" \
);
#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() \
{ \
NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"

39
xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_aarch64.s Normal file
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@ -0,0 +1,39 @@
# 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 NGPREGS,8
.set NFPREGS,8
.section ".text"
.globl SharedStub
.hidden SharedStub
.type SharedStub,@function
SharedStub:
stp x29, x30, [sp,#-16]!
mov x29, sp
sub sp, sp, #8*(NGPREGS+NFPREGS)
stp x0, x1, [sp, #64+(0*8)]
stp x2, x3, [sp, #64+(2*8)]
stp x4, x5, [sp, #64+(4*8)]
stp x6, x7, [sp, #64+(6*8)]
stp d0, d1, [sp, #(0*8)]
stp d2, d3, [sp, #(2*8)]
stp d4, d5, [sp, #(4*8)]
stp d6, d7, [sp, #(6*8)]
# methodIndex passed from stub
mov w1, w17
add x2, sp, #16+(8*(NGPREGS+NFPREGS))
add x3, sp, #8*NFPREGS
add x4, sp, #0
bl PrepareAndDispatch
add sp, sp, #8*(NGPREGS+NFPREGS)
ldp x29, x30, [sp],#16
ret
.size SharedStub, . - SharedStub