diff options
| -rw-r--r-- | entries/nwoeanhinnogaehr/fib.asm | 59 | ||||
| -rw-r--r-- | people.json | 11 |
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" + } + ] } ] |