Specifies the unique initial entry point of the image. Although an image can have multiple entry points, only one can be the initial entry point.
Syntax
--entry=location
Where location
entry_address-
A numerical value, for example: --entry=0x0
symbol-
Specifies an image entry point as the address of symbol--entry=reset_handler
offset+object(section)-
Specifies an image entry point as an offsetsectionobject--entry=8+startup.o(startupseg)
There must be no spaces within the argument to --entry. The input section and object names are matched
without case-sensitivity. You can use the following simplified notation:
-
object(section), if offset is zero.
-
object, if there is only one
input section. armlink generates an error
message if there is more than one code input section in object.
Note
If the entry address of your
image is in Thumb state, then the least significant bit of the address must be set to 1. The
linker does this automatically if you specify a symbol. For example, if the entry code
starts at address 0x8000--entry=0x8001.
Usage
The image can contain multiple entry points. Multiple entry points might be specified with
the ENTRY directive in assembler source files. In such ases, a unique
initial entry point must be specified for an image, otherwise the error L6305E is generated.
The initial entry point specified with the --entry option is stored in the
executable file header for use by the loader. There can be only one occurrence of this
option on the command line. A debugger typically uses this entry address to initialize the
Program Counter (PC) when an image is loaded. The
initial entry point must meet the following conditions:
The image entry point must lie within an execution region.
The execution region must be non-overlay, and must be a root execution region (load
address == execution address).
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