Merge pull request #49 from nwoeanhinnogaehr/main

add x86 elf (81 bytes)

2 files changed, 70 insertions, 0 deletions

diff --git a/entries/nwoeanhinnogaehr/fib.asm b/entries/nwoeanhinnogaehr/fib.asm
new file mode 100644
index 0000000..26ccf11
--- /dev/null
+++ b/entries/nwoeanhinnogaehr/fib.asm
@@ -0,0 +1,59 @@
+; assembles with nasm to an 81-byte ELF binary that works on x86 Linux
+
+bits 32
+org $25430000
+    db $7F,"ELF" ; e_ident
+    dd 1 ; p_type
+    dd 0 ; p_offset
+    dd $$ ; p_vaddr
+    dw 2 ; e_type, p_paddr
+    dw 3 ; e_machine
+    dd entry ; e_version, p_filesz
+    dw (entry-$$)&0xffff ; e_entry, p_memsz
+
+entry:
+    inc ebx
+    and eax,strict dword 4 ;nop
+    inc esi ; 1
+    inc edi ; 1
+            ; 2
+            ; 3
+            ; 5
+            ; 8
+            ; ...
+
+loop:
+    mov eax,esi
+    push 10
+    pop ebp
+    push ebp
+    jmp format
+    dw $20 ; e_phentsize
+    dw 1 ; e_phnum
+
+format:
+    cdq
+    div ebp
+    inc ebx
+    dec esp
+    or edx,'0'
+    mov [esp],dl
+    test eax,eax
+    jnz format
+
+print:
+    mov al,4
+    mov ecx,esp
+    mov edx,ebx
+    mov bl,1
+    int 0x80
+
+    ;update fibbo
+    mov eax,edi
+    add edi,esi
+    xchg esi,eax
+
+    ;exit on overflow
+    jno loop
+    xchg eax,ebx
+    int 0x80
diff --git a/people.json b/people.json
index 102b326..38744c3 100644
--- a/people.json
+++ b/people.json
@@ -419,5 +419,16 @@
                 "link": "./entries/markusde/collatz/collatz.png"
             }
         ]
+    },
+    {
+        "github": "nwoeanhinnogaehr",
+        "name": "Noah Weninger",
+        "title": "PhD Student, UWaterloo",
+        "entries": [
+            {
+                "name": "x86 ELF",
+                "link": "./entries/nwoeanhinnogaehr/fib.asm"
+            }
+        ]
     }
 ]