diff options
Diffstat (limited to 'src/include/symbols.h')
| -rw-r--r-- | src/include/symbols.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/include/symbols.h b/src/include/symbols.h index 4276176398..a36392f125 100644 --- a/src/include/symbols.h +++ b/src/include/symbols.h @@ -84,4 +84,11 @@ extern u8 _framebuffer[]; extern u8 _eframebuffer[]; #define _framebuffer_size (_eframebuffer - _framebuffer) +/* Put this into a .c file accessing a linker script region to mark that region + * as "optional". If it is defined in memlayout.ld (or anywhere else), the + * values from that definition will be used. If not, start, end and size will + * all evaluate to 0. (We can't explicitly assign the symbols to 0 in the + * assembly due to https://sourceware.org/bugzilla/show_bug.cgi?id=1038.) */ +#define DECLARE_OPTIONAL_REGION(name) asm (".weak _" #name ", _e" #name ) + #endif /* __SYMBOLS_H */ |