Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 106 insertions, 0 deletions

diff --git a/xpcom/reflect/xptcall/md/win32/xptcinvoke_x86_gnu.cpp b/xpcom/reflect/xptcall/md/win32/xptcinvoke_x86_gnu.cpp
new file mode 100644
index 0000000000..7576919b5a
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/win32/xptcinvoke_x86_gnu.cpp
@@ -0,0 +1,106 @@
+/* -*- 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"
+
+extern "C" {
+void __attribute__ ((__used__)) __attribute__ ((regparm(3)))
+invoke_copy_to_stack(uint32_t paramCount, nsXPTCVariant* s, uint32_t* d)
+{
+    for(uint32_t i = paramCount; i >0; i--, d++, s++)
+    {
+        if(s->IsIndirect())
+        {
+            *((void**)d) = &s->val;
+            continue;
+        }
+
+        switch(s->type)
+        {
+        case nsXPTType::T_I8     : *((int8_t*)  d) = s->val.i8;          break;
+        case nsXPTType::T_I16    : *((int16_t*) d) = s->val.i16;         break;
+        case nsXPTType::T_I32    : *((int32_t*) d) = s->val.i32;         break;
+        case nsXPTType::T_I64    : *((int64_t*) d) = s->val.i64; d++;    break;
+        case nsXPTType::T_U8     : *((uint8_t*) d) = s->val.u8;          break;
+        case nsXPTType::T_U16    : *((uint16_t*)d) = s->val.u16;         break;
+        case nsXPTType::T_U32    : *((uint32_t*)d) = s->val.u32;         break;
+        case nsXPTType::T_U64    : *((uint64_t*)d) = s->val.u64; d++;    break;
+        case nsXPTType::T_FLOAT  : *((float*)   d) = s->val.f;           break;
+        case nsXPTType::T_DOUBLE : *((double*)  d) = s->val.d;   d++;    break;
+        case nsXPTType::T_BOOL   : *((bool*)    d) = s->val.b;           break;
+        case nsXPTType::T_CHAR   : *((char*)    d) = s->val.c;           break;
+        case nsXPTType::T_WCHAR  : *((wchar_t*) d) = s->val.wc;          break;
+        default:
+            // all the others are plain pointer types
+            *((void**)d) = s->val.p;
+            break;
+        }
+    }
+}
+} // extern "C"
+
+/*
+  EXPORT_XPCOM_API(nsresult)
+  NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
+                   uint32_t paramCount, nsXPTCVariant* params);
+
+  Each param takes at most two 4-byte words.
+  It doesn't matter if we push too many words, and calculating the exact
+  amount takes time.
+
+  that        = ebp + 0x08
+  methodIndex = ebp + 0x0c
+  paramCount  = ebp + 0x10
+  params      = ebp + 0x14
+
+*/
+
+__asm__ (
+	".text\n\t"
+/* alignment here seems unimportant here; this was 16, now it's 2 which
+   is what xptcstubs uses. */
+	".align 2\n\t"
+	".globl _NS_InvokeByIndex\n\t"
+	"_NS_InvokeByIndex:\n\t"
+	"pushl %ebp\n\t"
+	"movl  %esp, %ebp\n\t"
+	"movl  0x10(%ebp), %eax\n\t"
+	"leal  0(,%eax,8),%edx\n\t"
+
+        /* set up call frame for method. */
+	"subl  %edx, %esp\n\t"       /* make room for params. */
+/* Align to maximum x86 data size: 128 bits == 16 bytes == XMM register size.
+ * This is to avoid protection faults where SSE+ alignment of stack pointer
+ * is assumed and required, e.g. by GCC4's -ftree-vectorize option.
+ */
+	"andl  $0xfffffff0, %esp\n\t"   /* drop(?) stack ptr to 128-bit align */
+/* $esp should be aligned to a 16-byte boundary here (note we include an
+ * additional 4 bytes in a later push instruction). This will ensure $ebp
+ * in the function called below is aligned to a 0x8 boundary. SSE instructions
+ * like movapd/movdqa expect memory operand to be aligned on a 16-byte
+ * boundary. The GCC compiler will generate the memory operand using $ebp
+ * with an 8-byte offset.
+ */
+	"subl  $0xc, %esp\n\t"          /* lower again; push/call below will re-align */
+	"movl  %esp, %ecx\n\t"          /* ecx = d */
+	"movl  8(%ebp), %edx\n\t"       /* edx = this */
+	"pushl %edx\n\t"                /* push this. esp % 16 == 0 */
+
+	"movl  0x14(%ebp), %edx\n\t"
+	"call  _invoke_copy_to_stack\n\t"
+	"movl  0x08(%ebp), %ecx\n\t"	/* 'that' */
+	"movl  (%ecx), %edx\n\t"
+	"movl  0x0c(%ebp), %eax\n\t"    /* function index */
+	"leal  (%edx,%eax,4), %edx\n\t"
+	"call  *(%edx)\n\t"
+	"movl  %ebp, %esp\n\t"
+	"popl  %ebp\n\t"
+	"ret\n"
+	".section .drectve\n\t"
+	".ascii \" -export:NS_InvokeByIndex\"\n\t"
+	".text\n\t"
+);