fox32os/kernel/fxf/fxf.asm

; FXF routines

; parse and relocate an FXF binary loaded in memory
; inputs:
; r0: pointer to memory buffer containing an FXF binary
; outputs:
; r0: relocation address or 0 on error
parse_fxf_binary:
    push r1
    mov r1, [r0]
    cmp r1, [fxf_magic]
    ifnz pop r1
    ifnz mov r0, 0
    ifnz ret
    pop r1

    call fxf_reloc

    ret

fxf_magic: data.strz "FXF"

    #include "fxf/launch.asm"
    #include "fxf/reloc.asm"

const FXF_CODE_SIZE:   0x00000004
const FXF_CODE_PTR:    0x00000008
const FXF_RELOC_SIZE:  0x0000000C
const FXF_RELOC_PTR:   0x00000010
fox32os: Initial commit 2022-05-19 23:15:40 +02:00			`; FXF routines`

			`; parse and relocate an FXF binary loaded in memory`
			`; inputs:`
			`; r0: pointer to memory buffer containing an FXF binary`
			`; outputs:`
Add file type check to parse_fxf_binary 2023-01-30 13:53:44 +01:00			`; r0: relocation address or 0 on error`
fox32os: Implement multitasking and add a jump table for applications 2022-05-22 01:55:56 +02:00			`parse_fxf_binary:`
Add file type check to parse_fxf_binary 2023-01-30 13:53:44 +01:00			`push r1`
			`mov r1, [r0]`
			`cmp r1, [fxf_magic]`
			`ifnz pop r1`
			`ifnz mov r0, 0`
			`ifnz ret`
			`pop r1`
fox32os: Initial commit 2022-05-19 23:15:40 +02:00
			`call fxf_reloc`

fox32os: Implement multitasking and add a jump table for applications 2022-05-22 01:55:56 +02:00			`ret`
fox32os: Initial commit 2022-05-19 23:15:40 +02:00
Make use of data.strz The filesystem image is the same before and after this commit: $ sha256sum fox32os-orig.img fox32os.img abc77bd6310b8eb6bcde0a8a442ca8bab071307a6cf5155ea606578435f77d27 fox32os-orig.img abc77bd6310b8eb6bcde0a8a442ca8bab071307a6cf5155ea606578435f77d27 fox32os.img The conversion was performed with a few sed commands: find -name '.asm' \| xargs sed -i -e 's/data.str \("[^"]"\) data.8 0$/data.strz \1/g' find -name '.asm' \| xargs sed -i -e 's/data.str \("[^"]"\) data.8 0 /data.strz \1 /g' find -name '.asm' \| xargs sed -i -e 's/data.str \("[^"]"\) data.8 0x00 /data.strz \1 /g' 2023-02-02 00:08:22 +01:00			`fxf_magic: data.strz "FXF"`
Add file type check to parse_fxf_binary 2023-01-30 13:53:44 +01:00
kernel/fxf and launcher: Add and use `launch_fxf_from_disk` syscall 2023-03-23 06:18:33 +01:00			`#include "fxf/launch.asm"`
fox32os: Initial commit 2022-05-19 23:15:40 +02:00			`#include "fxf/reloc.asm"`

			`const FXF_CODE_SIZE: 0x00000004`
			`const FXF_CODE_PTR: 0x00000008`
Remove unused `extern` and `global` tables from FXF 2022-06-22 04:05:34 +02:00			`const FXF_RELOC_SIZE: 0x0000000C`
			`const FXF_RELOC_PTR: 0x00000010`