www/seamonkey/patches/patch-xi

   1 $NetBSD: patch-xi,v 1.1.1.1 2009/08/05 02:59:49 tnn Exp $
   2
   3 NetBSD/amd64 xptcall support code. Originally from pkgsrc/www/mozilla.
   4
   5 --- mozilla/xpcom/reflect/xptcall/src/md/unix/xptcstubs_unixish_amd64.cpp.orig  2009-06-30 22:20:24.000000000 +0200
   6 +++ mozilla/xpcom/reflect/xptcall/src/md/unix/xptcstubs_unixish_amd64.cpp
   7 @@ -0,0 +1,206 @@
   8 +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   9 +
  10 +// Implement shared vtbl methods.
  11 +
  12 +#include "xptcprivate.h"
  13 +
  14 +// The Linux/x86-64 ABI passes the first 6 integral parameters and the
  15 +// first 8 floating point parameters in registers (rdi, rsi, rdx, rcx,
  16 +// r8, r9 and xmm0-xmm7), no stack space is allocated for these by the
  17 +// caller.  The rest of the parameters are passed in the callers stack
  18 +// area.
  19 +
  20 +const PRUint32 PARAM_BUFFER_COUNT   = 16;
  21 +const PRUint32 GPR_COUNT            = 6;
  22 +const PRUint32 FPR_COUNT            = 8;
  23 +
  24 +// PrepareAndDispatch() is called by SharedStub() and calls the actual method.
  25 +//
  26 +// - 'args[]' contains the arguments passed on stack
  27 +// - 'gpregs[]' contains the arguments passed in integer registers
  28 +// - 'fpregs[]' contains the arguments passed in floating point registers
  29 +//
  30 +// The parameters are mapped into an array of type 'nsXPTCMiniVariant'
  31 +// and then the method gets called.
  32 +
  33 +extern "C" nsresult
  34 +PrepareAndDispatch(nsXPTCStubBase * self, PRUint32 methodIndex,
  35 +                   PRUint64 * args, PRUint64 * gpregs, double *fpregs)
  36 +{
  37 +    nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
  38 +    nsXPTCMiniVariant* dispatchParams = NULL;
  39 +    nsIInterfaceInfo* iface_info = NULL;
  40 +    const nsXPTMethodInfo* info;
  41 +    PRUint32 paramCount;
  42 +    PRUint32 i;
  43 +    nsresult result = NS_ERROR_FAILURE;
  44 +
  45 +    NS_ASSERTION(self,"no self");
  46 +
  47 +    self->GetInterfaceInfo(&iface_info);
  48 +    NS_ASSERTION(iface_info,"no interface info");
  49 +    if (! iface_info)
  50 +        return NS_ERROR_UNEXPECTED;
  51 +
  52 +    iface_info->GetMethodInfo(PRUint16(methodIndex), &info);
  53 +    NS_ASSERTION(info,"no method info");
  54 +    if (! info)
  55 +        return NS_ERROR_UNEXPECTED;
  56 +
  57 +    paramCount = info->GetParamCount();
  58 +
  59 +    // setup variant array pointer
  60 +    if(paramCount > PARAM_BUFFER_COUNT)
  61 +        dispatchParams = new nsXPTCMiniVariant[paramCount];
  62 +    else
  63 +        dispatchParams = paramBuffer;
  64 +
  65 +    NS_ASSERTION(dispatchParams,"no place for params");
  66 +    if (! dispatchParams)
  67 +        return NS_ERROR_OUT_OF_MEMORY;
  68 +
  69 +    PRUint64* ap = args;
  70 +    PRUint32 nr_gpr = 1;    // skip one GPR register for 'that'
  71 +    PRUint32 nr_fpr = 0;
  72 +    PRUint64 value;
  73 +
  74 +    for(i = 0; i < paramCount; i++) {
  75 +        const nsXPTParamInfo& param = info->GetParam(i);
  76 +        const nsXPTType& type = param.GetType();
  77 +        nsXPTCMiniVariant* dp = &dispatchParams[i];
  78 +
  79 +        if (!param.IsOut() && type == nsXPTType::T_DOUBLE) {
  80 +            if (nr_fpr < FPR_COUNT)
  81 +                dp->val.d = fpregs[nr_fpr++];
  82 +            else
  83 +                dp->val.d = *(double*) ap++;
  84 +            continue;
  85 +        }
  86 +        else if (!param.IsOut() && type == nsXPTType::T_FLOAT) {
  87 +            if (nr_fpr < FPR_COUNT)
  88 +                // The value in %xmm register is already prepared to
  89 +                // be retrieved as a float. Therefore, we pass the
  90 +                // value verbatim, as a double without conversion.
  91 +                dp->val.d = *(double*) ap++;
  92 +            else
  93 +                dp->val.f = *(float*) ap++;
  94 +            continue;
  95 +        }
  96 +        else {
  97 +            if (nr_gpr < GPR_COUNT)
  98 +                value = gpregs[nr_gpr++];
  99 +            else
 100 +                value = *ap++;
 101 +        }
 102 +
 103 +        if (param.IsOut() || !type.IsArithmetic()) {
 104 +            dp->val.p = (void*) value;
 105 +            continue;
 106 +        }
 107 +
 108 +        switch (type) {
 109 +        case nsXPTType::T_I8:      dp->val.i8  = (PRInt8)   value; break;
 110 +        case nsXPTType::T_I16:     dp->val.i16 = (PRInt16)  value; break;
 111 +        case nsXPTType::T_I32:     dp->val.i32 = (PRInt32)  value; break;
 112 +        case nsXPTType::T_I64:     dp->val.i64 = (PRInt64)  value; break;
 113 +        case nsXPTType::T_U8:      dp->val.u8  = (PRUint8)  value; break;
 114 +        case nsXPTType::T_U16:     dp->val.u16 = (PRUint16) value; break;
 115 +        case nsXPTType::T_U32:     dp->val.u32 = (PRUint32) value; break;
 116 +        case nsXPTType::T_U64:     dp->val.u64 = (PRUint64) value; break;
 117 +        case nsXPTType::T_BOOL:    dp->val.b   = (PRBool)   value; break;
 118 +        case nsXPTType::T_CHAR:    dp->val.c   = (char)     value; break;
 119 +        case nsXPTType::T_WCHAR:   dp->val.wc  = (wchar_t)  value; break;
 120 +
 121 +        default:
 122 +            NS_ASSERTION(0, "bad type");
 123 +            break;
 124 +        }
 125 +    }
 126 +
 127 +    result = self->CallMethod((PRUint16) methodIndex, info, dispatchParams);
 128 +
 129 +    NS_RELEASE(iface_info);
 130 +
 131 +    if (dispatchParams != paramBuffer)
 132 +        delete [] dispatchParams;
 133 +
 134 +    return result;
 135 +}
 136 +
 137 +#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */
 138 +// Linux/x86-64 uses gcc >= 3.1
 139 +#define STUB_ENTRY(n) \
 140 +asm(".section  \".text\"\n\t" \
 141 +    ".align    2\n\t" \
 142 +    ".if       " #n " < 10\n\t" \
 143 +    ".globl    _ZN14nsXPTCStubBase5Stub" #n "Ev\n\t" \
 144 +    ".type     _ZN14nsXPTCStubBase5Stub" #n "Ev,@function\n" \
 145 +    "_ZN14nsXPTCStubBase5Stub" #n "Ev:\n\t" \
 146 +    ".elseif   " #n " < 100\n\t" \
 147 +    ".globl    _ZN14nsXPTCStubBase6Stub" #n "Ev\n\t" \
 148 +    ".type     _ZN14nsXPTCStubBase6Stub" #n "Ev,@function\n" \
 149 +    "_ZN14nsXPTCStubBase6Stub" #n "Ev:\n\t" \
 150 +    ".elseif    " #n " < 1000\n\t" \
 151 +    ".globl     _ZN14nsXPTCStubBase7Stub" #n "Ev\n\t" \
 152 +    ".type      _ZN14nsXPTCStubBase7Stub" #n "Ev,@function\n" \
 153 +    "_ZN14nsXPTCStubBase7Stub" #n "Ev:\n\t" \
 154 +    ".else\n\t" \
 155 +    ".err      \"stub number " #n " >= 1000 not yet supported\"\n\t" \
 156 +    ".endif\n\t" \
 157 +    "movl      $" #n ", %eax\n\t" \
 158 +    "jmp       SharedStub\n\t" \
 159 +    ".if       " #n " < 10\n\t" \
 160 +    ".size     _ZN14nsXPTCStubBase5Stub" #n "Ev,.-_ZN14nsXPTCStubBase5Stub" #n "Ev\n\t" \
 161 +    ".elseif   " #n " < 100\n\t" \
 162 +    ".size     _ZN14nsXPTCStubBase6Stub" #n "Ev,.-_ZN14nsXPTCStubBase6Stub" #n "Ev\n\t" \
 163 +    ".else\n\t" \
 164 +    ".size     _ZN14nsXPTCStubBase7Stub" #n "Ev,.-_ZN14nsXPTCStubBase7Stub" #n "Ev\n\t" \
 165 +    ".endif");
 166 +
 167 +// static nsresult SharedStub(PRUint32 methodIndex)
 168 +asm(".section   \".text\"\n\t"
 169 +    ".align     2\n\t"
 170 +    ".type      SharedStub,@function\n\t"
 171 +    "SharedStub:\n\t"
 172 +    // make room for gpregs (48), fpregs (64)
 173 +    "pushq      %rbp\n\t"
 174 +    "movq       %rsp,%rbp\n\t"
 175 +    "subq       $112,%rsp\n\t"
 176 +    // save GP registers
 177 +    "movq       %rdi,-112(%rbp)\n\t"
 178 +    "movq       %rsi,-104(%rbp)\n\t"
 179 +    "movq       %rdx, -96(%rbp)\n\t"
 180 +    "movq       %rcx, -88(%rbp)\n\t"
 181 +    "movq       %r8 , -80(%rbp)\n\t"
 182 +    "movq       %r9 , -72(%rbp)\n\t"
 183 +    "leaq       -112(%rbp),%rcx\n\t"
 184 +    // save FP registers
 185 +    "movsd      %xmm0,-64(%rbp)\n\t"
 186 +    "movsd      %xmm1,-56(%rbp)\n\t"
 187 +    "movsd      %xmm2,-48(%rbp)\n\t"
 188 +    "movsd      %xmm3,-40(%rbp)\n\t"
 189 +    "movsd      %xmm4,-32(%rbp)\n\t"
 190 +    "movsd      %xmm5,-24(%rbp)\n\t"
 191 +    "movsd      %xmm6,-16(%rbp)\n\t"
 192 +    "movsd      %xmm7, -8(%rbp)\n\t"
 193 +    "leaq       -64(%rbp),%r8\n\t"
 194 +    // rdi has the 'self' pointer already
 195 +    "movl       %eax,%esi\n\t"
 196 +    "leaq       16(%rbp),%rdx\n\t"
 197 +    "call       PrepareAndDispatch\n\t"
 198 +    "leave\n\t"
 199 +    "ret\n\t"
 200 +    ".size      SharedStub,.-SharedStub");
 201 +
 202 +#define SENTINEL_ENTRY(n) \
 203 +nsresult nsXPTCStubBase::Sentinel##n() \
 204 +{ \
 205 +    NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
 206 +    return NS_ERROR_NOT_IMPLEMENTED; \
 207 +}
 208 +
 209 +#include "xptcstubsdef.inc"
 210 +
 211 +#else
 212 +#error "can't find a compiler to use"
 213 +#endif /* __GNUC__ */