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Diffstat (limited to 'man/ld86.1')
| -rw-r--r-- | man/ld86.1 | 38 |
1 files changed, 38 insertions, 0 deletions
@@ -95,6 +95,44 @@ produce "unmapped zero page" executables .P All the options not taking an argument may be turned off by following the option letter by a '-', as for cc1. +.SH PREDEFINED LABELS +The linker predefines several labels that can be imported into user programs. +.TP +.B __etext +Standard C variable for the end of the text segment. +.TP +.B __edata +Standard C variable for the end of the initilised data. +.TP +.B __end +Standard C variable for the end of the bss area. +.TP +.B __segoff +The offset within the executable file between the start of the text segment +and the start of the data segment in 16 byte 'paragraphs'. Note this is +.B zero +for impure (tiny model) executables and is adjusted for executables that +don't start at offset 0 within the segment. +.TP +.B __segXDL +The lowest address with data in segment 'X'. (eg __seg0DL is for segment zero +or the text segment, __seg3DL is for the data segment) +The value 'X' is a hex digit. +.TP +.B __segXDH +The top of segment 'X's data area. +.TP +.B __segXCL +The bottom of segment 'X's 'common data' or unitilised data area. Each +segment has both an initilised and unitilised data area. +.TP +.B __segXCH +The top of segment 'X's common area. +.TP +.B __segXSO +This is the adjusted offset from segment 0 of the start of segment 'X' +in 'paragraphs'. + .SH HISTORY The 6809 version does not support -i. |