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backing out bug 530087 due to talos segfault on maemo

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This commit is contained in:
Brad Lassey 2009-11-25 01:45:30 -05:00
parent 2d9ec777ba
commit 42694ea646
1 changed files with 74 additions and 13 deletions
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87
xpcom/reflect/xptcall/src/md/unix/xptcinvoke_arm.cpp
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@ -60,8 +60,65 @@
// Remember that these 'words' are 32bit DWORDS
static PRUint32
invoke_count_words(PRUint32 paramCount, nsXPTCVariant* s)
{
PRUint32 result = 0;
for(PRUint32 i = 0; i < paramCount; i++, s++)
{
if(s->IsPtrData())
{
result++;
continue;
}
switch(s->type)
{
case nsXPTType::T_I8 :
case nsXPTType::T_I16 :
case nsXPTType::T_I32 :
result++;
break;
case nsXPTType::T_I64 :
result+=VAR_STACK_SIZE_64;
break;
case nsXPTType::T_U8 :
case nsXPTType::T_U16 :
case nsXPTType::T_U32 :
result++;
break;
case nsXPTType::T_U64 :
result+=VAR_STACK_SIZE_64;
break;
case nsXPTType::T_FLOAT :
result++;
break;
case nsXPTType::T_DOUBLE :
result+=VAR_STACK_SIZE_64;
break;
case nsXPTType::T_BOOL :
case nsXPTType::T_CHAR :
case nsXPTType::T_WCHAR :
result++;
break;
default:
// all the others are plain pointer types
result++;
break;
}
}
static PRUint32*
#ifdef __ARM_EABI__
/* Ensure stack is always aligned to doubleword boundary; we take 3 words
* off the stack to r1-r3 later, so it must always be on _odd_ word
* boundary after this */
if (result % 2 == 0)
result++;
#endif
return result;
}
static void
invoke_copy_to_stack(PRUint32* d, PRUint32 paramCount, nsXPTCVariant* s)
{
for(PRUint32 i = 0; i < paramCount; i++, d++, s++)
@ -98,7 +155,6 @@ invoke_copy_to_stack(PRUint32* d, PRUint32 paramCount, nsXPTCVariant* s)
break;
}
}
return d;
}
extern "C" {
@ -107,6 +163,7 @@ extern "C" {
PRUint32 Index;
PRUint32 Count;
nsXPTCVariant* params;
PRUint32 fn_count;
PRUint32 fn_copy;
};
}
@ -122,6 +179,7 @@ NS_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
my_params.Count = paramCount;
my_params.params = params;
my_params.fn_copy = (PRUint32) &invoke_copy_to_stack;
my_params.fn_count = (PRUint32) &invoke_count_words;
/* This is to call a given method of class that.
* The parameters are in params, the number is in paramCount.
@ -149,20 +207,22 @@ NS_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
*/
__asm__ __volatile__(
"ldr r1, [%1, #12] \n\t" /* prepare to call invoke_count_words */
"ldr ip, [%1, #16] \n\t" /* r0=paramCount, r1=params */
"ldr r0, [%1, #8] \n\t"
"mov r4, r0, lsl #3 \n\t" /* This is the amount of bytes needed. */
#ifdef __ARM_EABI__
"add r4, r4, #4 \n\t"
#endif
"mov lr, pc \n\t" /* call it... */
"mov pc, ip \n\t"
"mov r4, r0, lsl #2 \n\t" /* This is the amount of bytes needed. */
"sub sp, sp, r4 \n\t" /* use stack space for the args... */
"add r0, %1, #8 \n\t"
"ldmia r0, {r1, r2, ip} \n\t"
"mov r0, sp \n\t" /* prepare a pointer an the stack */
"blx ip \n\t"
"sub r4, r0, sp \n\t"
"ldmia %1, {r0, r2} \n\t"
"ldr r1, [%1, #8] \n\t" /* =paramCount */
"ldr r2, [%1, #12] \n\t" /* =params */
"ldr ip, [%1, #20] \n\t" /* =invoke_copy_to_stack */
"mov lr, pc \n\t" /* copy args to the stack like the */
"mov pc, ip \n\t" /* compiler would. */
"ldr r0, [%1] \n\t" /* =that */
"ldr r1, [r0, #0] \n\t" /* get that->vtable offset */
"ldr r2, [%1, #4] \n\t"
"mov r2, r2, lsl #2 \n\t" /* a vtable_entry(x)=8 + (4 bytes * x) */
#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */
"ldr ip, [r1, r2] \n\t" /* get method adress from vtable */
@ -177,7 +237,8 @@ NS_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
"addle sp, sp, r4 \n\t" /* and restore stack pointer */
"movle r4, #0 \n\t" /* a mark for restoring sp */
"ldr r0, [%1, #0] \n\t" /* get (self) */
"blx ip \n\t"
"mov lr, pc \n\t" /* call mathod */
"mov pc, ip \n\t"
"add sp, sp, r4 \n\t" /* restore stack pointer */
"mov %0, r0 \n\t" /* the result... */
: "=r" (result)