diff options
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp')
| -rw-r--r-- | xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp b/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp new file mode 100644 index 000000000..dc111e435 --- /dev/null +++ b/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp @@ -0,0 +1,144 @@ +/* -*- 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" + +/* Prototype specifies unmangled function name and disables unused warning */ +static void +invoke_copy_to_stack(uint64_t* d, uint32_t paramCount, nsXPTCVariant* s) +__asm__("invoke_copy_to_stack") __attribute__((used)); + +static void +invoke_copy_to_stack(uint64_t* d, uint32_t paramCount, nsXPTCVariant* s) +{ + const uint8_t NUM_ARG_REGS = 6-1; // -1 for "this" pointer + + for(uint32_t i = 0; i < paramCount; i++, d++, s++) + { + if(s->IsPtrData()) + { + *d = (uint64_t)s->ptr; + continue; + } + switch(s->type) + { + case nsXPTType::T_I8 : *d = (uint64_t)s->val.i8; break; + case nsXPTType::T_I16 : *d = (uint64_t)s->val.i16; break; + case nsXPTType::T_I32 : *d = (uint64_t)s->val.i32; break; + case nsXPTType::T_I64 : *d = (uint64_t)s->val.i64; break; + case nsXPTType::T_U8 : *d = (uint64_t)s->val.u8; break; + case nsXPTType::T_U16 : *d = (uint64_t)s->val.u16; break; + case nsXPTType::T_U32 : *d = (uint64_t)s->val.u32; break; + case nsXPTType::T_U64 : *d = (uint64_t)s->val.u64; break; + case nsXPTType::T_FLOAT : + if(i < NUM_ARG_REGS) + { + // convert floats to doubles if they are to be passed + // via registers so we can just deal with doubles later + union { uint64_t u64; double d; } t; + t.d = (double)s->val.f; + *d = t.u64; + } + else + // otherwise copy to stack normally + *d = (uint64_t)s->val.u32; + break; + case nsXPTType::T_DOUBLE : *d = (uint64_t)s->val.u64; break; + case nsXPTType::T_BOOL : *d = (uint64_t)s->val.b; break; + case nsXPTType::T_CHAR : *d = (uint64_t)s->val.c; break; + case nsXPTType::T_WCHAR : *d = (uint64_t)s->val.wc; break; + default: + // all the others are plain pointer types + *d = (uint64_t)s->val.p; + break; + } + } +} + +/* + * EXPORT_XPCOM_API(nsresult) + * NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex, + * uint32_t paramCount, nsXPTCVariant* params) + */ +__asm__( + "#### NS_InvokeByIndex ####\n" +".text\n\t" + ".align 5\n\t" + ".globl NS_InvokeByIndex\n\t" + ".ent NS_InvokeByIndex\n" +"NS_InvokeByIndex:\n\t" + ".frame $15,32,$26,0\n\t" + ".mask 0x4008000,-32\n\t" + "ldgp $29,0($27)\n" +"$NS_InvokeByIndex..ng:\n\t" + "subq $30,32,$30\n\t" + "stq $26,0($30)\n\t" + "stq $15,8($30)\n\t" + "bis $30,$30,$15\n\t" + ".prologue 1\n\t" + + /* + * Allocate enough stack space to hold the greater of 6 or "paramCount"+1 + * parameters. (+1 for "this" pointer) Room for at least 6 parameters + * is required for storage of those passed via registers. + */ + + "bis $31,5,$2\n\t" /* count = MAX(5, "paramCount") */ + "cmplt $2,$18,$1\n\t" + "cmovne $1,$18,$2\n\t" + "s8addq $2,16,$1\n\t" /* room for count+1 params (8 bytes each) */ + "bic $1,15,$1\n\t" /* stack space is rounded up to 0 % 16 */ + "subq $30,$1,$30\n\t" + + "stq $16,0($30)\n\t" /* save "that" (as "this" pointer) */ + "stq $17,16($15)\n\t" /* save "methodIndex" */ + + "addq $30,8,$16\n\t" /* pass stack pointer */ + "bis $18,$18,$17\n\t" /* pass "paramCount" */ + "bis $19,$19,$18\n\t" /* pass "params" */ + "bsr $26,$invoke_copy_to_stack..ng\n\t" /* call invoke_copy_to_stack */ + + /* + * Copy the first 6 parameters to registers and remove from stack frame. + * Both the integer and floating point registers are set for each parameter + * except the first which is the "this" pointer. (integer only) + * The floating point registers are all set as doubles since the + * invoke_copy_to_stack function should have converted the floats. + */ + "ldq $16,0($30)\n\t" /* integer registers */ + "ldq $17,8($30)\n\t" + "ldq $18,16($30)\n\t" + "ldq $19,24($30)\n\t" + "ldq $20,32($30)\n\t" + "ldq $21,40($30)\n\t" + "ldt $f17,8($30)\n\t" /* floating point registers */ + "ldt $f18,16($30)\n\t" + "ldt $f19,24($30)\n\t" + "ldt $f20,32($30)\n\t" + "ldt $f21,40($30)\n\t" + + "addq $30,48,$30\n\t" /* remove params from stack */ + + /* + * Call the virtual function with the constructed stack frame. + */ + "bis $16,$16,$1\n\t" /* load "this" */ + "ldq $2,16($15)\n\t" /* load "methodIndex" */ + "ldq $1,0($1)\n\t" /* load vtable */ + "s8addq $2,$31,$2\n\t" /* vtable index = "methodIndex" * 8 */ + "addq $1,$2,$1\n\t" + "ldq $27,0($1)\n\t" /* load address of function */ + "jsr $26,($27),0\n\t" /* call virtual function */ + "ldgp $29,0($26)\n\t" + + "bis $15,$15,$30\n\t" + "ldq $26,0($30)\n\t" + "ldq $15,8($30)\n\t" + "addq $30,32,$30\n\t" + "ret $31,($26),1\n\t" + ".end NS_InvokeByIndex" + ); |