diff options
| -rw-r--r-- | lld/ELF/Arch/AVR.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lld/ELF/Arch/AVR.cpp b/lld/ELF/Arch/AVR.cpp index ebc7616e0b3..86343a6faa1 100644 --- a/lld/ELF/Arch/AVR.cpp +++ b/lld/ELF/Arch/AVR.cpp @@ -6,6 +6,25 @@ // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// +// +// AVR is a Harvard-architecture 8-bit micrcontroller designed for small +// baremetal programs. All AVR-family processors have 32 8-bit registers. +// The tiniest AVR has 32 byte RAM and 1 KiB program memory, and the largest +// one supports up to 2^24 data address space and 2^22 code address space. +// +// Since it is a baremetal programming, there's usually no loader to load +// ELF files on AVRs. You are expected to link your program against address +// 0 and pull out a .text section from the result using objcopy, so that you +// can write the linked code to on-chip flush memory. You can do that with +// the following commands: +// +// ld.lld -Ttext=0 -o foo foo.o +// objcopy -O binary --only-section=.text foo output.bin +// +// Note that the current AVR support is very preliminary so you can't +// link any useful program yet, though. +// +//===----------------------------------------------------------------------===// #include "Error.h" #include "InputFiles.h" |
