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binaryninja-api/plugins/stack_render_layer/plugin.cpp at dev · Vector35/binaryninja-api · GitHub
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plugins
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stack_render_layer
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plugin.cpp
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stack_render_layer
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plugin.cpp
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#
include
<
binaryninjaapi.h
>
#
include
<
thread
>
using
namespace
BinaryNinja
;
class
StackRenderLayer
:
public
RenderLayer
{
public:
StackRenderLayer
(): RenderLayer(
"
Annotate Stack Offset
"
) {}
void
ApplyToLines
(
Ref<BasicBlock> block,
std::vector<DisassemblyTextLine>& lines
)
{
for
(
auto
& line: lines)
{
//
Skip blank lines (block separators)
if
(line.
tokens
.
empty
())
{
continue
;
}
//
Insert tokens after the address separator
int64_t
sep = -
1
;
for
(
int64_t
i =
0
; i < line.
tokens
.
size
(); i ++)
{
if
(line.
tokens
[i].
type
== AddressSeparatorToken)
{
sep = i;
break
;
}
}
//
Don't annotate lines which don't have an address separator
//
(these are usually annotations like { Does not return }
if
(sep == -
1
)
{
continue
;
}
RegisterValue stackOffset;
RegisterValue stackOffsetAfter;
if
(block->
GetFunction
()->
GetMediumLevelILIfAvailable
())
{
//
Grab stack offset value from function
stackOffset = block->
GetFunction
()->
GetRegisterValueAtInstruction
(
block->
GetArchitecture
(),
line.
addr
,
block->
GetArchitecture
()->
GetStackPointerRegister
()
);
stackOffsetAfter = block->
GetFunction
()->
GetRegisterValueAfterInstruction
(
block->
GetArchitecture
(),
line.
addr
,
block->
GetArchitecture
()->
GetStackPointerRegister
()
);
}
if
(stackOffset.
state
== StackFrameOffset)
{
//
Stack pointer is resolved to an offset: show the offset
//
(but negative because that is how other tools do it)
line.
tokens
.
emplace
(
line.
tokens
.
begin
() + sep +
1
,
AnnotationToken,
fmt::format
(
"
{:4x}
"
, -stackOffset.
value
),
-stackOffset.
value
);
}
else
{
//
Stack pointer is not resolved, show ??
line.
tokens
.
emplace
(
line.
tokens
.
begin
() + sep +
1
,
AnnotationToken,
"
??
"
,
0
);
}
//
And put a spacer after the offset token
if
(stackOffset != stackOffsetAfter)
{
line.
tokens
.
emplace
(
line.
tokens
.
begin
() + sep +
2
,
AnnotationToken,
"
*
"
);
}
else
{
line.
tokens
.
emplace
(
line.
tokens
.
begin
() + sep +
2
,
AnnotationToken,
"
"
);
}
}
}
virtual
void
ApplyToDisassemblyBlock
(
Ref<BasicBlock> block,
std::vector<DisassemblyTextLine>& lines
)
override
{
//
Break this out into a helper so we don't have to write it twice
ApplyToLines
(block, lines);
}
virtual
void
ApplyToLowLevelILBlock
(
Ref<BasicBlock> block,
std::vector<DisassemblyTextLine>& lines
)
override
{
//
Break this out into a helper so we don't have to write it twice
ApplyToLines
(block, lines);
}
};
extern
"
C
"
{
BN_DECLARE_CORE_ABI_VERSION
#
ifdef
DEMO_EDITION
bool
StackRenderLayerPluginInit
()
#
else
BINARYNINJAPLUGIN
bool
CorePluginInit
()
#
endif
{
static
StackRenderLayer* layer =
new
StackRenderLayer
();
RenderLayer::Register
(layer, DisabledByDefaultRenderLayerDefaultEnableState);
return
true
;
}
}
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