diff options
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcstubs_linux_alpha.cpp')
| -rw-r--r-- | xpcom/reflect/xptcall/md/unix/xptcstubs_linux_alpha.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcstubs_linux_alpha.cpp b/xpcom/reflect/xptcall/md/unix/xptcstubs_linux_alpha.cpp new file mode 100644 index 0000000000..d9c41aee70 --- /dev/null +++ b/xpcom/reflect/xptcall/md/unix/xptcstubs_linux_alpha.cpp @@ -0,0 +1,187 @@ +/* -*- 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" + +/* Prototype specifies unmangled function name and disables unused warning */ +static nsresult +PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args) +__asm__("PrepareAndDispatch") ATTRIBUTE_USED; + +static nsresult +PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args) +{ + const uint8_t PARAM_BUFFER_COUNT = 16; + const uint8_t NUM_ARG_REGS = 6-1; // -1 for "this" pointer + + 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"); + + // args[0] to args[NUM_ARG_REGS] hold floating point register values + uint64_t* ap = args + NUM_ARG_REGS; + 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; 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; break; + case nsXPTType::T_FLOAT : + if(i < NUM_ARG_REGS) + { + // floats passed via registers are stored as doubles + // in the first NUM_ARG_REGS entries in args + dp->val.u64 = (uint64_t) args[i]; + dp->val.f = (float) dp->val.d; // convert double to float + } + else + dp->val.u32 = (uint32_t) *ap; + break; + case nsXPTType::T_DOUBLE : + // doubles passed via registers are also stored + // in the first NUM_ARG_REGS entries in args + dp->val.u64 = (i < NUM_ARG_REGS) ? args[i] : *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 = (char16_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; +} + +/* + * SharedStub() + * Collects arguments and calls PrepareAndDispatch. The "methodIndex" is + * passed to this function via $1 to preserve the argument registers. + */ +__asm__( + "#### SharedStub ####\n" +".text\n\t" + ".align 5\n\t" + ".ent SharedStub\n" +"SharedStub:\n\t" + ".frame $30,96,$26,0\n\t" + ".mask 0x4000000,-96\n\t" + "ldgp $29,0($27)\n" +"$SharedStub..ng:\n\t" + "subq $30,96,$30\n\t" + "stq $26,0($30)\n\t" + ".prologue 1\n\t" + + /* + * Store arguments passed via registers to the stack. + * Floating point registers are stored as doubles and converted + * to floats in PrepareAndDispatch if necessary. + */ + "stt $f17,16($30)\n\t" /* floating point registers */ + "stt $f18,24($30)\n\t" + "stt $f19,32($30)\n\t" + "stt $f20,40($30)\n\t" + "stt $f21,48($30)\n\t" + "stq $17,56($30)\n\t" /* integer registers */ + "stq $18,64($30)\n\t" + "stq $19,72($30)\n\t" + "stq $20,80($30)\n\t" + "stq $21,88($30)\n\t" + + /* + * Call PrepareAndDispatch function. + */ + "bis $1,$1,$17\n\t" /* pass "methodIndex" */ + "addq $30,16,$18\n\t" /* pass "args" */ + "bsr $26,$PrepareAndDispatch..ng\n\t" + + "ldq $26,0($30)\n\t" + "addq $30,96,$30\n\t" + "ret $31,($26),1\n\t" + ".end SharedStub" + ); + +/* + * nsresult nsXPTCStubBase::Stub##n() + * Sets register $1 to "methodIndex" and jumps to SharedStub. + */ +#define STUB_MANGLED_ENTRY(n, symbol) \ + "#### Stub"#n" ####" "\n\t" \ + ".text" "\n\t" \ + ".align 5" "\n\t" \ + ".globl " symbol "\n\t" \ + ".ent " symbol "\n" \ +symbol ":" "\n\t" \ + ".frame $30,0,$26,0" "\n\t" \ + "ldgp $29,0($27)" "\n" \ +"$" symbol "..ng:" "\n\t" \ + ".prologue 1" "\n\t" \ + "lda $1,"#n "\n\t" \ + "br $31,$SharedStub..ng" "\n\t" \ + ".end " symbol + +#define STUB_ENTRY(n) \ +__asm__( \ + ".if "#n" < 10" "\n\t" \ + STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase5Stub"#n"Ev") "\n\t" \ + ".elseif "#n" < 100" "\n\t" \ + STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase6Stub"#n"Ev") "\n\t" \ + ".elseif "#n" < 1000" "\n\t" \ + STUB_MANGLED_ENTRY(n, "_ZN14nsXPTCStubBase7Stub"#n"Ev") "\n\t" \ + ".else" "\n\t" \ + ".err \"Stub"#n" >= 1000 not yet supported.\"" "\n\t" \ + ".endif" \ + ); + + +#define SENTINEL_ENTRY(n) \ +nsresult nsXPTCStubBase::Sentinel##n() \ +{ \ + NS_ERROR("nsXPTCStubBase::Sentinel called"); \ + return NS_ERROR_NOT_IMPLEMENTED; \ +} + +#include "xptcstubsdef.inc" |