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ssghost/stringio.asm

Last active October 4, 2025 05:39
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Revisions

  1. ssghost revised this gist Oct 4, 2025. No changes.
  2. ssghost revised this gist Oct 4, 2025. 1 changed file with 2 additions and 1 deletion.
    3 changes: 2 additions & 1 deletion stringio.asm
    View file
    Original file line number Diff line number Diff line change
    @@ -7,6 +7,7 @@
    WAITFOREVENT DQ ?
    CONOUT DQ ?
    OUTPUTSTRING DQ ?
    BOOTSERVICES DQ ?
    HELLOMESSAGE DW "H", "E", "L", "L", "O", " ", "U", "E", "F", "I", 10, 13, 0

    .CODE
    @@ -23,7 +24,7 @@ EFI_MAIN PROC
    MOV RBX, QWORD PTR [RAX + 08H]
    MOV OUTPUTSTRING, RBX
    MOV RAX, QWORD PTR [RDX + 60H]
    MOV BOOYSERVICE, RAX
    MOV BOOYSERVICES, RAX
    MOV RBX, QWORD PTR [RAX + 60H]
    MOV WAITFOREVENT, RBX

  3. ssghost revised this gist Oct 4, 2025. 1 changed file with 18 additions and 0 deletions.
    18 changes: 18 additions & 0 deletions stringio.asm
    View file
    Original file line number Diff line number Diff line change
    @@ -1,6 +1,10 @@
    .DATA
    IMAGE DQ ?
    SYSTEMTABLE DQ ?
    INDEX DQ ?
    CONIN DQ ?
    WAITFORKEY DQ ?
    WAITFOREVENT DQ ?
    CONOUT DQ ?
    OUTPUTSTRING DQ ?
    HELLOMESSAGE DW "H", "E", "L", "L", "O", " ", "U", "E", "F", "I", 10, 13, 0
    @@ -10,15 +14,29 @@ EFI_MAIN PROC
    MOV IMAGE, RCX
    MOV SYSTEMTABLE, RDX

    MOV RAX, QWORD PTR [RDX + 030H]
    MOV CONIN, RAX
    MOV RBX, QWORD PTR [RAX + 10H]
    MOV WAITFORKEY
    MOV RAX, QWORD PTR [RDX + 040H]
    MOV CONOUT, RAX
    MOV RBX, QWORD PTR [RAX + 08H]
    MOV OUTPUTSTRING, RBX
    MOV RAX, QWORD PTR [RDX + 60H]
    MOV BOOYSERVICE, RAX
    MOV RBX, QWORD PTR [RAX + 60H]
    MOV WAITFOREVENT, RBX


    MOV RCX, CONOUT
    LEA RDX, [HELLOMESSAGE]
    CALL OUTPUTSTRING

    MOV RCX, 01H
    LEA RDX, [WAITFORKEY]
    LEA R8, [INDEX]
    CALL WAITFOREVENT

    RET

    EFI_MAIN ENDP
  4. ssghost created this gist Oct 4, 2025.
    25 changes: 25 additions & 0 deletions stringio.asm
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,25 @@
    .DATA
    IMAGE DQ ?
    SYSTEMTABLE DQ ?
    CONOUT DQ ?
    OUTPUTSTRING DQ ?
    HELLOMESSAGE DW "H", "E", "L", "L", "O", " ", "U", "E", "F", "I", 10, 13, 0

    .CODE
    EFI_MAIN PROC
    MOV IMAGE, RCX
    MOV SYSTEMTABLE, RDX

    MOV RAX, QWORD PTR [RDX + 040H]
    MOV CONOUT, RAX
    MOV RBX, QWORD PTR [RAX + 08H]
    MOV OUTPUTSTRING, RBX

    MOV RCX, CONOUT
    LEA RDX, [HELLOMESSAGE]
    CALL OUTPUTSTRING

    RET

    EFI_MAIN ENDP
    END