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start codegen

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pommicket 2022-02-09 22:44:27 -05:00
parent d74dc53b0b
commit 3d44eba388
5 changed files with 210 additions and 4 deletions
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7
05/constants.b
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@ -1,10 +1,13 @@
; this is the format of the executables we produce:
; elf header 4MB addresses 0x000000-0x400000 (no, it won't actually take up that much space)
; code 4MB addresses 0x400000-0x7fffff
; elf header 2MB addresses 0x000000-0x200000 (no, it won't actually take up that much space)
; entry point 2MB addresses 0x200000-0x3fffff this is where we put the code to call main(), etc. (again, it won't actually take up that much space)
; code (functions) 4MB addresses 0x400000-0x7fffff
; read-only data 4MB addresses 0x800000-0xbfffff
; read-write data 4MB addresses 0xc00000-0xffffff
; note that file offsets and runtime addresses are the same.
; you should be able to change these constants without breaking anything:
#define ENTRY_ADDR 0x200000
#define FUNCTIONS_ADDR 0x400000
#define RODATA_ADDR 0x800000
#define RWDATA_ADDR 0xc00000
#define RWDATA_END 0x1000000