aniani/nasm
0
0
Fork 1
mirror of https://github.com/netwide-assembler/nasm.git synced 2025-09-22 10:43:39 -04:00
Code Activity

Test and Makefile rules for 32- and 64-bit ELF shared libraries

Browse Source 
Add Makefile rules for the 32-bit ELF shared library test, and add a
64-bit ELF shared library test (still work in progress.)
This commit is contained in:
H. Peter Anvin
2008-10-17 17:13:26 -07:00
parent d83fb7e338
commit e41b69beaf
4 changed files with 160 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
test/Makefile
View File

@@ -37,6 +37,33 @@ diff: performtest.pl $(NASM) $(TESTS)
clean: clean:
rm -f *.com *.o *.o64 *.obj *.obj64 *.exe *.lst *.bin rm -f *.com *.o *.o64 *.obj *.obj64 *.exe *.lst *.bin
rm -rf testresults rm -rf testresults
rm -f elftest elftest64
spotless: clean spotless: clean
rm -rf golden rm -rf golden
#
# Test for ELF32 shared libraries; assumes an x86 Linux system
#
elfso.o: elfso.asm
$(NASM) $(NASMOPT) -f elf32 -o $@ -l $*.lst $<
elfso.so: elfso.o
$(LD) -m elf_i386 -shared -o $@ $<
elftest: elftest.c elfso.so
$(CC) -m32 -o $@ $^
env LD_LIBRARY_PATH=.:$$LD_LIBRARY_PATH ./elftest
#
# Test for ELF64 shared libraries; assumes an x86-64 Linux system
#
elf64so.o: elf64so.asm
$(NASM) $(NASMOPT) -f elf64 -o $@ -l $*.lst $<
elf64so.so: elf64so.o
$(LD) -shared -o $@ $<
elftest64: elftest64.c elf64so.so
$(CC) -o $@ $^
env LD_LIBRARY_PATH=.:$$LD_LIBRARY_PATH ./elftest64

89
test/elf64so.asm Normal file
View File

@@ -0,0 +1,89 @@
; 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]

2
test/elftest.c
View File

@@ -33,4 +33,6 @@ int main(void)
printf("These pointers should be equal: %p and %p\n", &greet, textptr); printf("These pointers should be equal: %p and %p\n", &greet, textptr);
printf("So should these: %p and %p\n", selfptr, &selfptr); printf("So should these: %p and %p\n", selfptr, &selfptr);
return 0;
} }

42
test/elftest64.c Normal file
View File

@@ -0,0 +1,42 @@
/*
* build with:
* nasm -f elf64 elf64so.asm
* ld -shared -o elf64so.so elf64so.o
* test with:
* gcc -o elf64so elftest64.c ./elf64so.so
* ./elf64so
*/
#include <stdio.h>
#include <inttypes.h>
extern long lrotate(long, int);
extern void greet(void);
extern int8_t asmstr[];
extern void *selfptr;
extern void *textptr;
extern long integer;
long commvar;
int main(void)
{
printf("Testing lrotate: should get 0x00400000, 0x00000001\n");
printf("lrotate(0x00040000, 4) = 0x%08lx\n", lrotate(0x40000, 4));
printf("lrotate(0x00040000, 46) = 0x%08lx\n", lrotate(0x40000, 46));
printf("This string should read `hello, world': `%s'\n", asmstr);
printf("&integer = %p, &commvar = %p\n", &integer, &commvar);
printf("The integers here should be 1234, 1235 and 4321:\n");
integer = 1234;
commvar = 4321;
greet();
printf("These pointers should be equal: %p and %p\n", &greet, textptr);
printf("So should these: %p and %p\n", selfptr, &selfptr);
return 0;
}