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MoonchildProductions/UXP#2897: backport upstream xptcinvoke and xptcstubs for Loongarch64

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Basilisk-Dev 2026-01-08 09:37:39 -05:00 • committed by ownedbywuigi
commit 94217bc365
5 changed files with 431 additions and 0 deletions
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7
xpcom/reflect/xptcall/md/unix/moz.build
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@ -114,6 +114,13 @@ if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD', 'NetBSD', 'OpenBSD'):
'xptcstubs_aarch64.cpp',
'xptcstubs_asm_aarch64.S',
]
if CONFIG['CPU_ARCH'].startswith('loongarch64'):
SOURCES += [
'xptcinvoke_asm_loongarch64.S',
'xptcinvoke_loongarch64.cpp',
'xptcstubs_asm_loongarch64.S',
'xptcstubs_loongarch64.cpp',
]
if CONFIG['OS_TEST'] == 'm68k':
SOURCES += [
'xptcinvoke_linux_m68k.cpp',

91
xpcom/reflect/xptcall/md/unix/xptcinvoke_asm_loongarch64.S Normal file
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@ -0,0 +1,91 @@
/* This Source Code Form subject to the terms of 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
.text
.globl _NS_InvokeByIndex
.type _NS_InvokeByIndex, @function
/*
* _NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
* uint32_t paramCount, nsXPTCVariant* params)
*/
_NS_InvokeByIndex:
.cfi_startproc
addi.d $sp, $sp, -32
.cfi_def_cfa_offset 32
st.d $s0, $sp, 16
.cfi_offset 23, -16
st.d $s1, $sp, 8
.cfi_offset 24, -24
st.d $s2, $sp, 0
.cfi_offset 25, -32
st.d $ra, $sp, 24
.cfi_offset 1, -8
move $s2, $a0
move $s1, $a1
move $s0, $sp
.cfi_def_cfa_register 23
/* 16-bytes alignment */
addi.d $a0, $a2, 1
li.d $t4, 0xfffffffffffffffe
and $a0, $a0, $t4
slli.d $a0, $a0, 3
sub.d $sp, $sp, $a0
move $a4, $sp
addi.d $sp, $sp, -8*(NGPREGS+NFPREGS)
move $a0, $sp
addi.d $a1, $sp, 8*NGPREGS
bl invoke_copy_to_stack
/* 1st argument is this */
move $a0, $s2
ld.d $a1, $sp, 8
ld.d $a2, $sp, 16
ld.d $a3, $sp, 24
ld.d $a4, $sp, 32
ld.d $a5, $sp, 40
ld.d $a6, $sp, 48
ld.d $a7, $sp, 56
fld.d $fa0, $sp, 64
fld.d $fa1, $sp, 72
fld.d $fa2, $sp, 80
fld.d $fa3, $sp, 88
fld.d $fa4, $sp, 96
fld.d $fa5, $sp, 104
fld.d $fa6, $sp, 112
fld.d $fa7, $sp, 120
addi.d $sp, $sp, 8*(NGPREGS+NFPREGS)
ld.d $s2, $s2, 0
slli.w $s1, $s1, 3
add.d $s2, $s2, $s1
ld.d $t3, $s2, 0
jirl $ra, $t3, 0
move $sp, $s0
.cfi_def_cfa_register 3
ld.d $s0, $sp, 16
.cfi_restore 23
ld.d $s1, $sp, 8
.cfi_restore 24
ld.d $s2, $sp, 0
.cfi_restore 25
ld.d $ra, $sp, 24
.cfi_restore 1
addi.d $sp, $sp, 32
.cfi_def_cfa_offset -32
jirl $zero, $ra, 0
.cfi_endproc
.size _NS_InvokeByIndex, .-_NS_InvokeByIndex
.section .note.GNU-stack, "", @progbits

110
xpcom/reflect/xptcall/md/unix/xptcinvoke_loongarch64.cpp Normal file
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@ -0,0 +1,110 @@
/* -*- 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(__loongarch64)
#error "This code is for Linux LoongArch64 only."
#endif
extern "C" void
invoke_copy_to_stack(uint64_t* gpregs, double* fpregs,
uint32_t paramCount, nsXPTCVariant* s,
uint64_t* d)
{
static const uint32_t GPR_COUNT = 8;
static const uint32_t FPR_COUNT = 8;
uint32_t nr_gpr = 1; // skip one GPR register for "this"
uint32_t nr_fpr = 0;
uint64_t value = 0;
for (uint32_t i = 0; i < paramCount; i++, s++) {
if (s->IsIndirect()) {
value = (uint64_t)&s->val;
} else {
switch (s->type) {
case nsXPTType::T_FLOAT:
break;
case nsXPTType::T_DOUBLE:
break;
case nsXPTType::T_I8:
value = s->val.i8;
break;
case nsXPTType::T_I16:
value = s->val.i16;
break;
case nsXPTType::T_I32:
value = s->val.i32;
break;
case nsXPTType::T_I64:
value = s->val.i64;
break;
case nsXPTType::T_U8:
value = s->val.u8;
break;
case nsXPTType::T_U16:
value = s->val.u16;
break;
case nsXPTType::T_U32:
// 32-bit values need to be sign-extended in 64-bit registers,
// so use the signed value here.
value = s->val.i32;
break;
case nsXPTType::T_U64:
value = s->val.u64;
break;
case nsXPTType::T_BOOL:
value = s->val.b;
break;
case nsXPTType::T_CHAR:
value = s->val.c;
break;
case nsXPTType::T_WCHAR:
value = s->val.wc;
break;
default:
value = (uint64_t)s->val.p;
break;
}
}
if (!s->IsIndirect() && s->type == nsXPTType::T_DOUBLE) {
if (nr_fpr < FPR_COUNT) {
fpregs[nr_fpr++] = s->val.d;
} else if (nr_gpr < GPR_COUNT) {
memcpy(&gpregs[nr_gpr++], &(s->val.d), sizeof(s->val.d));
} else {
memcpy(d++, &(s->val.d), sizeof(s->val.d));
}
} else if (!s->IsIndirect() && s->type == nsXPTType::T_FLOAT) {
if (nr_fpr < FPR_COUNT) {
memcpy(&fpregs[nr_fpr++], &(s->val.f), sizeof(s->val.f));
} else if (nr_gpr < GPR_COUNT) {
memcpy(&gpregs[nr_gpr++], &(s->val.f), sizeof(s->val.f));
} else {
memcpy(d++, &(s->val.f), sizeof(s->val.f));
}
} else {
if (nr_gpr < GPR_COUNT) {
gpregs[nr_gpr++] = value;
} else {
*d++ = value;
}
}
}
}
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);
}

53
xpcom/reflect/xptcall/md/unix/xptcstubs_asm_loongarch64.S Normal file
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@ -0,0 +1,53 @@
# 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 NGPRGES, 8
.set NFPREGS, 8
.text
.globl SharedStub
.hidden SharedStub
.type SharedStub,@function
SharedStub:
.cfi_startproc
move $t0, $sp
addi.d $sp, $sp, -8*(NGPRGES+NFPREGS)-16
.cfi_def_cfa_offset 8*(NGPRGES+NFPREGS)+16
st.d $a0, $sp, 0
st.d $a1, $sp, 8
st.d $a2, $sp, 16
st.d $a3, $sp, 24
st.d $a4, $sp, 32
st.d $a5, $sp, 40
st.d $a6, $sp, 48
st.d $a7, $sp, 56
fst.d $fa0, $sp, 64
fst.d $fa1, $sp, 72
fst.d $fa2, $sp, 80
fst.d $fa3, $sp, 88
fst.d $fa4, $sp, 96
fst.d $fa5, $sp, 104
fst.d $fa6, $sp, 112
fst.d $fa7, $sp, 120
st.d $ra, $sp, 136
.cfi_offset 1, 136
/* methodIndex is passed from stub */
move $a1, $t6
move $a2, $t0
move $a3, $sp
addi.d $a4, $sp, 8*NGPRGES
bl PrepareAndDispatch
ld.d $ra, $sp, 136
.cfi_restore 1
addi.d $sp, $sp, 8*(NGPRGES+NFPREGS)+16
.cfi_def_cfa_offset -8*(NGPRGES+NFPREGS)-16
jirl $zero, $ra, 0
.cfi_endproc
.size SharedStub, .-SharedStub
.section .note.GNU-stack, "", @progbits

170
xpcom/reflect/xptcall/md/unix/xptcstubs_loongarch64.cpp Normal file
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@ -0,0 +1,170 @@
/* -*- 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"
#if !defined(__loongarch64)
#error "This code is for Linux LoongArch64 only."
#endif
extern "C" nsresult ATTRIBUTE_USED
PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex,
uint64_t* args, uint64_t* gpregs, double* fpregs)
{
#define PARAM_BUFFER_COUNT 16
static const uint32_t GPR_COUNT = 8;
static const uint32_t FPR_COUNT = 8;
nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
nsXPTCMiniVariant* dispatchParams = paramBuffer;
const nsXPTMethodInfo* info;
NS_ASSERTION(self, "no self");
self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
NS_ASSERTION(info, "no method info");
uint32_t paramCount = info->GetParamCount();
if (paramCount > PARAM_BUFFER_COUNT) {
dispatchParams = new nsXPTCMiniVariant[paramCount];
}
NS_ASSERTION(dispatchParams, "no place for params");
uint64_t* ap = args;
uint32_t nr_gpr = 1; // skip the arg which is 'self'
uint32_t nr_fpr = 0;
uint64_t value = 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 == nsXPTType::T_DOUBLE) {
if (nr_fpr < FPR_COUNT) {
dp->val.d = fpregs[nr_fpr++];
} else if (nr_gpr < GPR_COUNT) {
memcpy(&dp->val.d, &gpregs[nr_gpr++], sizeof(dp->val.d));
} else {
memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
}
continue;
}
if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
if (nr_fpr < FPR_COUNT) {
memcpy(&dp->val.f, &fpregs[nr_fpr++], sizeof(dp->val.f));
} else if (nr_gpr < GPR_COUNT) {
memcpy(&dp->val.f, &gpregs[nr_gpr++], sizeof(dp->val.f));
} else {
memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
}
continue;
}
if (nr_gpr < GPR_COUNT) {
value = gpregs[nr_gpr++];
} else {
value = *ap++;
}
if (param.IsOut() || !type.IsArithmetic()) {
dp->val.p = (void*)value;
continue;
}
switch (type) {
case nsXPTType::T_I8:
dp->val.i8 = (int8_t)value;
break;
case nsXPTType::T_I16:
dp->val.i16 = (int16_t)value;
break;
case nsXPTType::T_I32:
dp->val.i32 = (int32_t)value;
break;
case nsXPTType::T_I64:
dp->val.i64 = (int64_t)value;
break;
case nsXPTType::T_U8:
dp->val.u8 = (uint8_t)value;
break;
case nsXPTType::T_U16:
dp->val.u16 = (uint16_t)value;
break;
case nsXPTType::T_U32:
dp->val.u32 = (uint32_t)value;
break;
case nsXPTType::T_U64:
dp->val.u64 = (uint64_t)value;
break;
case nsXPTType::T_BOOL:
dp->val.b = (bool)(uint8_t)value;
break;
case nsXPTType::T_CHAR:
dp->val.c = (char)value;
break;
case nsXPTType::T_WCHAR:
dp->val.wc = (wchar_t)value;
break;
default:
NS_ASSERTION(0, "bad type");
break;
}
}
nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
dispatchParams);
if (dispatchParams != paramBuffer) {
delete [] dispatchParams;
}
return result;
}
// Load $t6 with the constant 'n' and branch to SharedStub().
#define STUB_ENTRY(n) \
__asm__( \
".text\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" \
"li.d $t6, "#n" \n\t" \
"b SharedStub \n" \
".if "#n" < 10 \n\t" \
".size _ZN14nsXPTCStubBase5Stub"#n"Ev,.-_ZN14nsXPTCStubBase5Stub"#n"Ev\n\t" \
".elseif "#n" < 100 \n\t" \
".size _ZN14nsXPTCStubBase6Stub"#n"Ev,.-_ZN14nsXPTCStubBase6Stub"#n"Ev\n\t" \
".else \n\t" \
".size _ZN14nsXPTCStubBase7Stub"#n"Ev,.-_ZN14nsXPTCStubBase7Stub"#n"Ev\n\t" \
".endif" \
);
#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() \
{ \
NS_ASSERTION(0, "nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"