summaryrefslogtreecommitdiffstats
path: root/xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp')
-rw-r--r--xpcom/reflect/xptcall/md/unix/xptcinvoke_linux_alpha.cpp144
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 0000000000..dc111e4358
--- /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"
+ );