# HG changeset patch
# User Marcin Juszkiewicz <mjuszkiewicz@redhat.com>
# Date 1393440196 18000
# Node ID d56b5c1a557348d4ac14a4d1ea7a5b5d240e3647
# Parent 6a46f53ad944b44385398822d7bcf7621a785d91
Bug 963024 - AArch64 support for XPCOM. r=froydnj
diff --git a/xpcom/reflect/xptcall/src/md/unix/moz.build b/xpcom/reflect/xptcall/src/md/unix/moz.build
--- a/xpcom/reflect/xptcall/src/md/unix/moz.build
+++ b/xpcom/reflect/xptcall/src/md/unix/moz.build
@@ -144,16 +144,23 @@ if CONFIG['OS_ARCH'] == 'NetBSD':
if CONFIG['OS_TEST'] in ('amiga', 'atari', 'hp300', 'mac68k', 'mvme68k',
'next68k', 'sun3', 'sun3x', 'x68k'):
SOURCES += [
'xptcinvoke_netbsd_m68k.cpp',
'xptcstubs_netbsd_m68k.cpp'
]
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',
'xptcstubs_linux_m68k.cpp',
]
if CONFIG['OS_TEST'].find('mips') != -1:
if CONFIG['OS_TEST'].find('mips64') != -1:
SOURCES += [
diff --git a/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_aarch64.cpp b/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_aarch64.cpp
new file mode 100644
--- /dev/null
+++ b/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_aarch64.cpp
@@ -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);
+}
diff --git a/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_aarch64.s b/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_aarch64.s
new file mode 100644
--- /dev/null
+++ b/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_asm_aarch64.s
@@ -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
+
+
diff --git a/xpcom/reflect/xptcall/src/md/unix/xptcstubs_aarch64.cpp b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_aarch64.cpp
new file mode 100644
--- /dev/null
+++ b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_aarch64.cpp
@@ -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"
diff --git a/xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_aarch64.s b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_aarch64.s
new file mode 100644
--- /dev/null
+++ b/xpcom/reflect/xptcall/src/md/unix/xptcstubs_asm_aarch64.s
@@ -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