summaryrefslogtreecommitdiffstats
path: root/xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp')
-rw-r--r--xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp205
1 files changed, 205 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp
new file mode 100644
index 000000000..f63d0c1e2
--- /dev/null
+++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_arm_openbsd.cpp
@@ -0,0 +1,205 @@
+/* -*- 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"
+
+#ifdef __GNUC__
+/* This tells gcc3.4+ not to optimize away symbols.
+ * @see http://gcc.gnu.org/gcc-3.4/changes.html
+ */
+#define DONT_DROP_OR_WARN __attribute__((used))
+#else
+/* This tells older gccs not to warn about unused vairables.
+ * @see http://docs.freebsd.org/info/gcc/gcc.info.Variable_Attributes.html
+ */
+#define DONT_DROP_OR_WARN __attribute__((unused))
+#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")
+DONT_DROP_OR_WARN;
+
+static nsresult ATTRIBUTE_USED
+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");
+ if (!dispatchParams)
+ return NS_ERROR_OUT_OF_MEMORY;
+
+ 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 : 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 : dp->val.u64 = *((uint64_t*)ap); ap++; break;
+ case nsXPTType::T_FLOAT : dp->val.f = *((float*) ap); break;
+ case nsXPTType::T_DOUBLE : 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\
+ .text \n\
+ .align 2 \n\
+SharedStub: \n\
+ stmfd sp!, {r1, r2, r3} \n\
+ mov r2, sp \n\
+ str lr, [sp, #-4]! \n\
+ mov r1, ip \n\
+ bl _PrepareAndDispatch \n\
+ ldr pc, [sp], #16");
+
+/*
+ * 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__( \
+ ".section \".text\"\n" \
+" .align 2\n" \
+" .iflt ("#n" - 10)\n" \
+" .globl _ZN14nsXPTCStubBase5Stub"#n"Ev\n" \
+" .type _ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n" \
+"_ZN14nsXPTCStubBase5Stub"#n"Ev:\n" \
+" .else\n" \
+" .iflt ("#n" - 100)\n" \
+" .globl _ZN14nsXPTCStubBase6Stub"#n"Ev\n" \
+" .type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n" \
+"_ZN14nsXPTCStubBase6Stub"#n"Ev:\n" \
+" .else\n" \
+" .iflt ("#n" - 1000)\n" \
+" .globl _ZN14nsXPTCStubBase7Stub"#n"Ev\n" \
+" .type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n" \
+"_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"