| # -*- makefile -*- |
| # |
| # arch/x86-64/MCONFIG |
| # |
| # Special rules for this architecture. Note that this is actually |
| # included from the main Makefile, and that pathnames should be |
| # accordingly. |
| # |
| # Blatantly copied and modified from i386 version by Mats Petersson, AMD. |
| # |
| |
| # |
| # NOTE: -fno-asynchronous-unwind-tables produce significantly smaller |
| # binaries (20% smaller), but makes the code completely useless for |
| # debugging using gdb. |
| # |
| KLIBCARCHREQFLAGS = -m64 |
| KLIBCOPTFLAGS += -Os -fomit-frame-pointer -mno-sse \ |
| -falign-functions=1 -falign-jumps=1 -falign-loops=1 |
| ifeq ($(DEBUG),y) |
| KLIBCOPTFLAGS += -g |
| else |
| KLIBCOPTFLAGS += -fno-asynchronous-unwind-tables |
| endif |
| KLIBCBITSIZE = 64 |
| KLIBCLDFLAGS = -m elf_x86_64 |
| |
| # Extra linkflags when building the shared version of the library |
| # This address needs to be reachable using normal inter-module |
| # calls, and work on the memory models for this architecture |
| # 2 MB - normal binaries start at 4 MB |
| # |
| # binutils now uses max-page-size=0x200000 by default, which pushes |
| # klibc.so data over the 4 MB mark, overlapping the executable. |
| # The old default was max-page-size=0x100000, but that also results |
| # in a broken layout with binutils 2.30. Since there's no |
| # architectural page size betwen 4 KB and 2MB, set it to 4 KB. |
| KLIBCSHAREDFLAGS = -Ttext 0x00200200 -z max-page-size=0x1000 |
| |
| # Asm includes for x86_64 are in the merged x86 tree |
| KLIBCARCHINCFLAGS = -I$(KLIBCKERNELOBJ)/arch/x86/include |
