Add m-esr52 at 52.6.0

1 files changed, 238 insertions, 0 deletions

diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_arm.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_arm.cpp
new file mode 100644
index 000000000..ef4f8514d
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_arm.cpp
@@ -0,0 +1,238 @@
+/* -*- 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/. */
+
+/* Implement shared vtbl methods. */
+
+#include "xptcprivate.h"
+#include "xptiprivate.h"
+
+#if !defined(__arm__) && !(defined(LINUX) || defined(ANDROID) || defined(XP_DARWIN))
+#error "This code is for Linux/iOS ARM only. Please check if it works for you, too.\nDepends strongly on gcc behaviour."
+#endif
+
+/* Specify explicitly a symbol for this function, don't try to guess the c++ mangled symbol.  */
+static nsresult PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint32_t* args) asm("_PrepareAndDispatch")
+ATTRIBUTE_USED;
+
+#ifdef __ARM_EABI__
+#define DOUBLEWORD_ALIGN(p) ((uint32_t *)((((uint32_t)(p)) + 7) & 0xfffffff8))
+#else
+#define DOUBLEWORD_ALIGN(p) (p)
+#endif
+
+// Apple's iOS toolchain is lame.
+#ifdef __APPLE__
+#define GNU(str)
+#define APPLE(str) str
+#define UNDERSCORE "__"
+#else
+#define GNU(str) str
+#define APPLE(str)
+#define UNDERSCORE "_"
+#endif
+
+#ifdef __thumb__
+#define THUMB_FUNC ".thumb_func\n"
+#else
+#define THUMB_FUNC
+#endif
+
+static nsresult
+PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint32_t* args)
+{
+#define PARAM_BUFFER_COUNT     16
+
+    nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
+    nsXPTCMiniVariant* dispatchParams = nullptr;
+    const nsXPTMethodInfo* info;
+    uint8_t paramCount;
+    uint8_t i;
+    nsresult result = NS_ERROR_FAILURE;
+
+    NS_ASSERTION(self,"no self");
+
+    self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
+    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");
+
+    uint32_t* ap = args;
+    for(i = 0; i < paramCount; i++, ap++)
+    {
+        const nsXPTParamInfo& param = info->GetParam(i);
+        const nsXPTType& type = param.GetType();
+        nsXPTCMiniVariant* dp = &dispatchParams[i];
+
+        if(param.IsOut() || !type.IsArithmetic())
+        {
+            dp->val.p = (void*) *ap;
+            continue;
+        }
+        // else
+        switch(type)
+        {
+        case nsXPTType::T_I8     : dp->val.i8  = *((int8_t*)  ap);       break;
+        case nsXPTType::T_I16    : dp->val.i16 = *((int16_t*) ap);       break;
+        case nsXPTType::T_I32    : dp->val.i32 = *((int32_t*) ap);       break;
+        case nsXPTType::T_I64    : ap = DOUBLEWORD_ALIGN(ap);
+				   dp->val.i64 = *((int64_t*) ap); ap++; break;
+        case nsXPTType::T_U8     : dp->val.u8  = *((uint8_t*) ap);       break;
+        case nsXPTType::T_U16    : dp->val.u16 = *((uint16_t*)ap);       break;
+        case nsXPTType::T_U32    : dp->val.u32 = *((uint32_t*)ap);       break;
+        case nsXPTType::T_U64    : ap = DOUBLEWORD_ALIGN(ap);
+				   dp->val.u64 = *((uint64_t*)ap); ap++; break;
+        case nsXPTType::T_FLOAT  : dp->val.f   = *((float*)   ap);       break;
+        case nsXPTType::T_DOUBLE : ap = DOUBLEWORD_ALIGN(ap);
+				   dp->val.d   = *((double*)  ap); ap++; break;
+        case nsXPTType::T_BOOL   : dp->val.b   = *((bool*)  ap);       break;
+        case nsXPTType::T_CHAR   : dp->val.c   = *((char*)    ap);       break;
+        case nsXPTType::T_WCHAR  : dp->val.wc  = *((wchar_t*) ap);       break;
+        default:
+            NS_ERROR("bad type");
+            break;
+        }
+    }
+
+    result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
+
+    if(dispatchParams != paramBuffer)
+        delete [] dispatchParams;
+
+    return result;
+}
+
+/*
+ * This is our shared stub.
+ *
+ * r0 = Self.
+ *
+ * The Rules:
+ *   We pass an (undefined) number of arguments into this function.
+ *   The first 3 C++ arguments are in r1 - r3, the rest are built
+ *   by the calling function on the stack.
+ *
+ *   We are allowed to corrupt r0 - r3, ip, and lr.
+ *
+ * Other Info:
+ *   We pass the stub number in using `ip'.
+ *
+ * Implementation:
+ * - We save r1 to r3 inclusive onto the stack, which will be
+ *   immediately below the caller saved arguments.
+ * - setup r2 (PrepareAndDispatch's args pointer) to point at
+ *   the base of all these arguments
+ * - Save LR (for the return address)
+ * - Set r1 (PrepareAndDispatch's methodindex argument) from ip
+ * - r0 is passed through (self)
+ * - Call PrepareAndDispatch
+ * - When the call returns, we return by loading the PC off the
+ *   stack, and undoing the stack (one instruction)!
+ *
+ */
+__asm__ ("\n"
+         GNU(".text\n")
+         APPLE(".section __TEXT,__text\n")
+         THUMB_FUNC
+         ".align 2\n"
+         "SharedStub:\n"
+         GNU(".fnstart\n")
+         GNU(".cfi_startproc\n")
+         "stmfd	sp!, {r1, r2, r3}\n"
+         GNU(".save {r1, r2, r3}\n")
+         GNU(".cfi_def_cfa_offset 12\n")
+         GNU(".cfi_offset r3, -4\n")
+         GNU(".cfi_offset r2, -8\n")
+         GNU(".cfi_offset r1, -12\n")
+         "mov	r2, sp\n"
+         "str	lr, [sp, #-4]!\n"
+         GNU(".save	{lr}\n")
+         GNU(".cfi_def_cfa_offset 16\n")
+         GNU(".cfi_offset lr, -16\n")
+         "mov	r1, ip\n"
+         "bl	_PrepareAndDispatch\n"
+         "ldr	pc, [sp], #16\n"
+         GNU(".cfi_endproc\n")
+         GNU(".fnend"));
+
+/*
+ * Create sets of stubs to call the SharedStub.
+ * We don't touch the stack here, nor any registers, other than IP.
+ * IP is defined to be corruptable by a called function, so we are
+ * safe to use it.
+ *
+ * This will work with or without optimisation.
+ */
+
+/*
+ * Note : As G++3 ABI contains the length of the functionname in the
+ *  mangled name, it is difficult to get a generic assembler mechanism like
+ *  in the G++ 2.95 case.
+ *  Create names would be like :
+ *    _ZN14nsXPTCStubBase5Stub9Ev
+ *    _ZN14nsXPTCStubBase6Stub13Ev
+ *    _ZN14nsXPTCStubBase7Stub144Ev
+ *  Use the assembler directives to get the names right...
+ */
+
+#define STUB_ENTRY(n)						\
+  __asm__(							\
+        GNU(".section \".text\"\n")                             \
+        APPLE(".section __TEXT,__text\n")                       \
+"	.align 2\n"						\
+"	.if ("#n" - 10) < 0\n"                                  \
+"	.globl	" UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev\n"	\
+        THUMB_FUNC                                              \
+        GNU(".type	_ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n") \
+UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev:\n"			\
+"	.else\n"                                                \
+"	.if  ("#n" - 100) < 0\n"                                \
+"	.globl	" UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev\n"	\
+          THUMB_FUNC \
+          GNU(".type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n") \
+UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev:\n"			\
+"	.else\n"                                                \
+"	.if ("#n" - 1000) < 0\n"                                \
+"	.globl	" UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev\n"	\
+        THUMB_FUNC                                              \
+        GNU(".type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n") \
+UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev:\n"			\
+"	.else\n"                                                \
+"	.err \"stub number "#n"> 1000 not yet supported\"\n"    \
+"	.endif\n"                                               \
+"	.endif\n"                                               \
+"	.endif\n"                                               \
+"	mov	ip, #"#n"\n"					\
+"	b	SharedStub\n\t");
+
+#if 0
+/*
+ * This part is left in as comment : this is how the method definition
+ * should look like.
+ */
+
+#define STUB_ENTRY(n)  \
+nsresult nsXPTCStubBase::Stub##n ()  \
+{ \
+  __asm__ (	  		        \
+"	mov	ip, #"#n"\n"					\
+"	b	SharedStub\n\t");                               \
+  return 0; /* avoid warnings */                                \
+}
+#endif
+
+
+#define SENTINEL_ENTRY(n) \
+nsresult nsXPTCStubBase::Sentinel##n() \
+{ \
+    NS_ERROR("nsXPTCStubBase::Sentinel called"); \
+    return NS_ERROR_NOT_IMPLEMENTED; \
+}
+
+#include "xptcstubsdef.inc"