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Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp')
-rw-r--r--xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp115
1 files changed, 67 insertions, 48 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
index 571fb42a2f..d535557259 100644
--- a/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
+++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_aarch64.cpp
@@ -4,12 +4,24 @@
* 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
+template<typename T> void
+get_value_and_advance(T* aOutValue, void*& aStack) {
+#ifdef __APPLE__
+ const size_t aligned_size = sizeof(T);
+#else
+ const size_t aligned_size = 8;
+#endif
+ // Ensure the pointer is aligned for the type
+ uintptr_t addr = (reinterpret_cast<uintptr_t>(aStack) + aligned_size - 1) & ~(aligned_size - 1);
+ memcpy(aOutValue, reinterpret_cast<void*>(addr), sizeof(T));
+ aStack = reinterpret_cast<void*>(addr + aligned_size);
+}
+
/*
* This is for AArch64 ABI
*
@@ -17,18 +29,15 @@
* 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,
+extern "C" nsresult ATTRIBUTE_USED
+PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, void* 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");
@@ -37,27 +46,30 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
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");
+ const uint8_t indexOfJSContext = info->IndexOfJSContext();
- uint64_t* ap = args;
+ void* 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];
+ nsXPTCMiniVariant* dp = &paramBuffer[i];
+
+ if (i == indexOfJSContext) {
+ if (next_gpr < PARAM_GPR_COUNT)
+ next_gpr++;
+ else {
+ void* value;
+ get_value_and_advance(&value, ap);
+ }
+ }
if (param.IsOut() || !type.IsArithmetic()) {
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.p = (void*)gprData[next_gpr++];
} else {
- dp->val.p = (void*)*ap++;
+ get_value_and_advance(&dp->val.p, ap);
}
continue;
}
@@ -67,7 +79,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i8 = (int8_t)gprData[next_gpr++];
} else {
- dp->val.i8 = (int8_t)*ap++;
+ get_value_and_advance(&dp->val.i8, ap);
}
break;
@@ -75,7 +87,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i16 = (int16_t)gprData[next_gpr++];
} else {
- dp->val.i16 = (int16_t)*ap++;
+ get_value_and_advance(&dp->val.i16, ap);
}
break;
@@ -83,7 +95,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i32 = (int32_t)gprData[next_gpr++];
} else {
- dp->val.i32 = (int32_t)*ap++;
+ get_value_and_advance(&dp->val.i32, ap);
}
break;
@@ -91,7 +103,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i64 = (int64_t)gprData[next_gpr++];
} else {
- dp->val.i64 = (int64_t)*ap++;
+ get_value_and_advance(&dp->val.i64, ap);
}
break;
@@ -99,7 +111,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u8 = (uint8_t)gprData[next_gpr++];
} else {
- dp->val.u8 = (uint8_t)*ap++;
+ get_value_and_advance(&dp->val.u8, ap);
}
break;
@@ -107,7 +119,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u16 = (uint16_t)gprData[next_gpr++];
} else {
- dp->val.u16 = (uint16_t)*ap++;
+ get_value_and_advance(&dp->val.u16, ap);
}
break;
@@ -115,7 +127,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u32 = (uint32_t)gprData[next_gpr++];
} else {
- dp->val.u32 = (uint32_t)*ap++;
+ get_value_and_advance(&dp->val.u32, ap);
}
break;
@@ -123,7 +135,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u64 = (uint64_t)gprData[next_gpr++];
} else {
- dp->val.u64 = (uint64_t)*ap++;
+ get_value_and_advance(&dp->val.u64, ap);
}
break;
@@ -131,7 +143,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
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));
+ get_value_and_advance(&dp->val.f, ap);
}
break;
@@ -139,15 +151,17 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
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));
+ get_value_and_advance(&dp->val.d, ap);
}
break;
case nsXPTType::T_BOOL:
if (next_gpr < PARAM_GPR_COUNT) {
- dp->val.b = (bool)gprData[next_gpr++];
+ dp->val.b = (bool)(uint8_t)gprData[next_gpr++];
} else {
- dp->val.b = (bool)*ap++;
+ uint8_t value;
+ get_value_and_advance(&value, ap);
+ dp->val.b = (bool)value;
}
break;
@@ -155,7 +169,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.c = (char)gprData[next_gpr++];
} else {
- dp->val.c = (char)*ap++;
+ get_value_and_advance(&dp->val.c, ap);
}
break;
@@ -163,7 +177,7 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.wc = (wchar_t)gprData[next_gpr++];
} else {
- dp->val.wc = (wchar_t)*ap++;
+ get_value_and_advance(&dp->val.wc, ap);
}
break;
@@ -173,35 +187,40 @@ PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
}
}
- result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
-
- if (dispatchParams != paramBuffer) {
- delete [] dispatchParams;
- }
+ nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
+ paramBuffer);
return result;
}
+#ifdef __APPLE__
+#define GNU(str)
+#define UNDERSCORE "__"
+#else
+#define GNU(str) str
+#define UNDERSCORE "_"
+#endif
+
// Load w17 with the constant 'n' and branch to SharedStub().
# define STUB_ENTRY(n) \
__asm__ ( \
- ".section \".text\" \n\t" \
+ ".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" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n")\
+ "" UNDERSCORE "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" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n")\
+ "" UNDERSCORE "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" \
+ ".globl " UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
+ GNU(".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t") \
+ GNU(".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n")\
+ UNDERSCORE "ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
".else \n\t" \
".err \"stub number "#n" >= 1000 not yet supported\"\n" \
".endif \n\t" \
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