mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-21 03:14:19 +08:00
e41b69beaf
Add Makefile rules for the 32-bit ELF shared library test, and add a 64-bit ELF shared library test (still work in progress.)
90 lines
2.4 KiB
NASM
90 lines
2.4 KiB
NASM
; test source file for assembling to ELF64 shared library
|
|
; build with:
|
|
; nasm -f elf64 elf64so.asm
|
|
; ld -shared -o elf64so.so elf64so.o
|
|
; test with:
|
|
; gcc -o elf64so elftest64.c ./elf64so.so
|
|
; ./elf64so
|
|
|
|
; This file should test the following:
|
|
; [1] Define and export a global text-section symbol
|
|
; [2] Define and export a global data-section symbol
|
|
; [3] Define and export a global BSS-section symbol
|
|
; [4] Define a non-global text-section symbol
|
|
; [5] Define a non-global data-section symbol
|
|
; [6] Define a non-global BSS-section symbol
|
|
; [7] Define a COMMON symbol
|
|
; [8] Define a NASM local label
|
|
; [9] Reference a NASM local label
|
|
; [10] Import an external symbol
|
|
; [11] Make a PC-relative call to an external symbol
|
|
; [12] Reference a text-section symbol in the text section
|
|
; [13] Reference a data-section symbol in the text section
|
|
; [14] Reference a BSS-section symbol in the text section
|
|
; [15] Reference a text-section symbol in the data section
|
|
; [16] Reference a data-section symbol in the data section
|
|
; [17] Reference a BSS-section symbol in the data section
|
|
|
|
BITS 64
|
|
GLOBAL lrotate:function ; [1]
|
|
GLOBAL greet:function ; [1]
|
|
GLOBAL asmstr:data asmstr.end-asmstr ; [2]
|
|
GLOBAL textptr:data 8 ; [2]
|
|
GLOBAL selfptr:data 8 ; [2]
|
|
GLOBAL integer:data 8 ; [3]
|
|
EXTERN printf ; [10]
|
|
COMMON commvar 8:8 ; [7]
|
|
EXTERN _GLOBAL_OFFSET_TABLE_
|
|
|
|
SECTION .text
|
|
|
|
; prototype: long lrotate(long x, int num);
|
|
lrotate: ; [1]
|
|
push rbp
|
|
mov rbp,rsp
|
|
mov rax,rdi
|
|
mov rcx,rsi
|
|
.label rol rax,1 ; [4] [8]
|
|
loop .label ; [9] [12]
|
|
mov rsp,rbp
|
|
pop rbp
|
|
ret
|
|
|
|
; prototype: void greet(void);
|
|
;; rdi - rsi - rdx - rcx - r8 - r9
|
|
;; rbx, rbp, r12-r15 are saved
|
|
greet:
|
|
mov rax,[rel commvar wrt ..got] ; &commvar
|
|
mov rcx,[rax] ; commvar
|
|
mov rax,[rel integer wrt ..got] ; &integer
|
|
mov rsi,[rax]
|
|
lea rdx,[rsi+1]
|
|
mov [rel localint],rdx ; localint = integer+1
|
|
mov rax,[rel localptr] ; localptr
|
|
mov rdx,[rax] ; *localptr = localint
|
|
lea rdi,[rel printfstr]
|
|
xor eax,eax ; No fp arguments
|
|
jmp printf wrt ..plt ; [10]
|
|
|
|
SECTION .data
|
|
|
|
; a string
|
|
asmstr db 'hello, world', 0 ; [2]
|
|
.end:
|
|
|
|
; a string for Printf
|
|
printfstr db "integer=%ld, localint=%ld, commvar=%ld", 10, 0
|
|
|
|
; some pointers
|
|
localptr dq localint ; [5] [17]
|
|
textptr dq greet wrt ..sym ; [15]
|
|
selfptr dq selfptr wrt ..sym ; [16]
|
|
|
|
SECTION .bss
|
|
|
|
; an integer
|
|
integer resq 1 ; [3]
|
|
|
|
; a local integer
|
|
localint resq 1 ; [6]
|