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HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
I NEED A DEBUGGER FOR NASM PROGRAMS Hello everybody Finally I'm writing some assembly programs on Linux, but need a good debugger that supports assembly. Kdbg and DDD run the programs but Kdbg does not trace the code on the source window (just can see how change the registers and the IP register, I have to imagine or trace mentally the code), and DDD does not even show the code and the same thing that only advances IP HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient in COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it FIRST CHARACTER OF STRING Re: First character of string. sys_write will print the number of characters in edx, so if you want just one character, tell edx 1. " " would refer to the second byte of "string", but ecx wants the address, not " " would do it. DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
I NEED A DEBUGGER FOR NASM PROGRAMS Hello everybody Finally I'm writing some assembly programs on Linux, but need a good debugger that supports assembly. Kdbg and DDD run the programs but Kdbg does not trace the code on the source window (just can see how change the registers and the IP register, I have to imagine or trace mentally the code), and DDD does not even show the code and the same thing that only advances IP HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient in COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it FIRST CHARACTER OF STRING Re: First character of string. sys_write will print the number of characters in edx, so if you want just one character, tell edx 1. " " would refer to the second byte of "string", but ecx wants the address, not " " would do it. DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. INDEX OF /PUB/NASM/RELEASEBUILDS/2.15.05RC2 Parent Directory - doc/ 2020-08-27 13:25 - Online documentation: win32/ 2020-08-27 13:28 - Windows packages (32 bit) win64/ 2020-08-27 13:28 - Windows packages (64 bit) INDEX OF /PUB/NASM/RELEASEBUILDS/2.15.05RC2 Parent Directory - linux/ 2020-08-27 13:28 - Linux packages: dos/ 2020-08-27 13:28 - MS-DOS executables: macosx/ 2020-08-27 13:28 -MacOS X packages
HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run itCOMMENT - NASM
Hallo allemaal, You can add comment to your ASM using the semicolon ';'. But this works only for one line. In C you can outcomment complete blocks by placing then between /* and */.CONDITIONAL JUMPING
EDIT: (Sorry decimal to hexadecimal my bad) I have been trying to make a decimal to hexadecimal converter and I need to use conditional jumps to test if the number is 10 or over so I can print a letter instead of a number here is my code so far CALLING C MATH LIBRARY FUNCTIONS FROM NASM Apologies are in order. As a matter of fact, I later worked out how to do what I wanted to achieve. Here is the solution for the call to the libm log function: Code: ;math.s. A NASM program that calls several functions in the C math library . SEGMENT .data. ABSOLUTE OR RELATIVE ADDRESSING Re: Absolute or Relative Addressing. It seems that the problem is indeed due to address displacements being wider than 32 bits (due to the Golink linker loading the program at 0x1400000 I think it was). The simple solution apparently is to tell it to load it NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLERINTRODUCTIONRUNNING NASMTHE NASM LANGUAGETHE NASM PREPROCESSORSTANDARD MACROS This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it 64 BIT LINKING IN WINDOWS ld -m elf_x86_64 -s -o Asm.exe Asm.o Anything with "elf" in it is probably wrong there, too. What happens if you try to link it with no"-m" switch at all?
NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLERINTRODUCTIONRUNNING NASMTHE NASM LANGUAGETHE NASM PREPROCESSORSTANDARD MACROS This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it 64 BIT LINKING IN WINDOWS ld -m elf_x86_64 -s -o Asm.exe Asm.o Anything with "elf" in it is probably wrong there, too. What happens if you try to link it with no"-m" switch at all?
NASM - THE NETWIDE ASSEMBLER Chapter 7: Assembler Directives. NASM, though it attempts to avoid the bureaucracy of assemblers like MASM and TASM, is nevertheless forced to support a few directives. These are described in this chapter. INDEX OF /PUB/NASM/RELEASEBUILDS/2.15.05RC2 Parent Directory - doc/ 2020-08-27 13:25 - Online documentation: win32/ 2020-08-27 13:28 - Windows packages (32 bit) win64/ 2020-08-27 13:28 - Windows packages (64 bit) INDEX OF /PUB/NASM/RELEASEBUILDS/2.15.05RC2 Parent Directory - linux/ 2020-08-27 13:28 - Linux packages: dos/ 2020-08-27 13:28 - MS-DOS executables: macosx/ 2020-08-27 13:28 -MacOS X packages
HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. COMPILING AN ASSEMBLY PROGRAM WITH NASM To compile, I have: nasm -f win32 test.asm -o test.o. ld test.o -o test.exe. By now, there is no problem. But as long as I run: test or test.exe. A new window opens which says: A problem caused the program to stop working correctly. Windows will close the program and notifyyou
HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it INTERFACING NASM WITH G++ AND VC++ 2017 Interfacing NASM with g++ and VC++ 2017. Today is the time to interface NASM with C++ using g++ and VC++ (2017). Do you know of a tutorial that I can use? The examples in the manual demostrate how to call assembly functions and how to pass numerical arguments, but in particular I need to pass pointers to strings and data buffers fromC++ to ASM.
I NEED A DEBUGGER FOR NASM PROGRAMS Hello everybody Finally I'm writing some assembly programs on Linux, but need a good debugger that supports assembly. Kdbg and DDD run the programs but Kdbg does not trace the code on the source window (just can see how change the registers and the IP register, I have to imagine or trace mentally the code), and DDD does not even show the code and the same thing that only advances IP PROBLEMS BUILDING NASM USING SASM Hi everyone, I'm new at the forum and at assembler programming. I have been using Dr Paul Carter's book to help me learn assembly.To write, build, and debug NASM I have been using the SASM IDE. However when I built the following code: NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLERINTRODUCTIONRUNNING NASMTHE NASM LANGUAGETHE NASM PREPROCESSORSTANDARD MACROS This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLERINTRODUCTIONRUNNING NASMTHE NASM LANGUAGETHE NASM PREPROCESSORSTANDARD MACROS This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASM - THE NETWIDE ASSEMBLER This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 7: Assembler Directives. NASM, though it attempts to avoid the bureaucracy of assemblers like MASM and TASM, is nevertheless forced to support a few directives. These are described in this chapter. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. INDEX OF /PUB/NASM/RELEASEBUILDS/2.15.05RC2 Parent Directory - doc/ 2020-08-27 13:25 - Online documentation: win32/ 2020-08-27 13:28 - Windows packages (32 bit) win64/ 2020-08-27 13:28 - Windows packages (64 bit) HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it MULTIPLE SOURCE FILES AND BINARY OUTPUT I'm currently trying to split a large source file into smaller, more manageable units and want to be able to assemble to object files and link to produce initially a .com file (for testing) then a binary file as part of my OS loader. I am able to create OMF object files easily, and MS Link 5.63 appears to link successfully, but the resultinARRAY - NASM
Keep in mind that the numbering starts at zero! If, for the benefit of zero-impaired "users", you want to let them call the zeroth element "1", you can make the adjustment, but the "real" numbering starts at zero. This means that the "last" element is "ARRAY_SIZE - 1"! Code:cmp
READING GDTR, IDTR AND LDTR IN REAL MODE Re: Reading GDTR, IDTR and LDTR in real mode. Hi! With the release of the 386, protected mode could be exited by loading the segment registers with real mode values, disabling the A20 line and clearing the PE bit in the CR0 register, without the need to NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. NASM - THE NETWIDE ASSEMBLER Chapter 7: Assembler Directives. NASM, though it attempts to avoid the bureaucracy of assemblers like MASM and TASM, is nevertheless forced to support a few directives. These are described in this chapter. HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
RESERVING SPACE IN NASM CODE FOR LATER DATA Re: reserving space in nasm code for later data. « Reply #1 on: January 10, 2021, 07:43:16 PM ». to save x spaces, you can use. Code: label: times x db 0. Of course, "label" can be whatever you want, and possible be left out (although that is generally not practical). You can also use resb, resw, resd to reserve uninitialisedspace.
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient inADDING TWO NUMBERS
Re: Adding two numbers - user input. « Reply #3 on: June 04, 2013, 09:17:19 PM ». Quote from: TightCoderEx on June 04, 2013, 05:30:56 PM. Let's say you're adding 9 and 3. num1 becomes 39H or 57 and num2 becomes 33H or 51. 57 + 51 = 108 + 48 = 156. So what you're actually printing is character code 156 and depending upon character set itcould
READING GDTR, IDTR AND LDTR IN REAL MODE Re: Reading GDTR, IDTR and LDTR in real mode. Hi! With the release of the 386, protected mode could be exited by loading the segment registers with real mode values, disabling the A20 line and clearing the PE bit in the CR0 register, without the need to NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. NASM - THE NETWIDE ASSEMBLER Chapter 7: Assembler Directives. NASM, though it attempts to avoid the bureaucracy of assemblers like MASM and TASM, is nevertheless forced to support a few directives. These are described in this chapter. HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
RESERVING SPACE IN NASM CODE FOR LATER DATA Re: reserving space in nasm code for later data. « Reply #1 on: January 10, 2021, 07:43:16 PM ». to save x spaces, you can use. Code: label: times x db 0. Of course, "label" can be whatever you want, and possible be left out (although that is generally not practical). You can also use resb, resw, resd to reserve uninitialisedspace.
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient inADDING TWO NUMBERS
Re: Adding two numbers - user input. « Reply #3 on: June 04, 2013, 09:17:19 PM ». Quote from: TightCoderEx on June 04, 2013, 05:30:56 PM. Let's say you're adding 9 and 3. num1 becomes 39H or 57 and num2 becomes 33H or 51. 57 + 51 = 108 + 48 = 156. So what you're actually printing is character code 156 and depending upon character set itcould
READING GDTR, IDTR AND LDTR IN REAL MODE Re: Reading GDTR, IDTR and LDTR in real mode. Hi! With the release of the 386, protected mode could be exited by loading the segment registers with real mode values, disabling the A20 line and clearing the PE bit in the CR0 register, without the need to NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER - INDEX 23 Guests, 0 Users Most Online Today: 39.Most Online Ever: 2029 (November 21, 2020, 02:00:53 PM) NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW TO USE LD.EXE TO LINK HELLO WORLD WITHOUT USING Step 5 - Use ld.exe (version 2.12.90) to Link the .obj file using that Library to create the Portable Executable. My 'new way' of compiling a Portable Executable eliminates Step 3 and Step 4 -. Step 1 - Create your .asm file. Step 2 - Use NASM (version 0.98.39) to compile the .asm file into an .obj file. LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
DISABLE RELOCATION, OR SPECIFY CONSTANT TO WRT? CALL somefunc. For this, NASM creates an object file that will cause the linker to later relocate the value of "somevar" and "somefunc" relative to the section start defined by the linker. I tried several things to turn that off: ORG. ORG is plain not accepted for ELF, so something like "ORG 0" at the start of the section does not work. WRT. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. NASM - THE NETWIDE ASSEMBLER Chapter 9: Writing 16-bit Code (DOS, Windows 3/3.1) This chapter attempts to cover some of the common issues encountered when writing 16-bit code to run under MS-DOS or Windows 3.x.It covers how to link programs to produce .EXE or .COM files, how to write .SYS device drivers, and how to interface assembly language code with 16-bit C compilers and with Borland Pascal. NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. NASM - THE NETWIDE ASSEMBLER Chapter 7: Assembler Directives. NASM, though it attempts to avoid the bureaucracy of assemblers like MASM and TASM, is nevertheless forced to support a few directives. These are described in this chapter. HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
RESERVING SPACE IN NASM CODE FOR LATER DATA Re: reserving space in nasm code for later data. « Reply #1 on: January 10, 2021, 07:43:16 PM ». to save x spaces, you can use. Code: label: times x db 0. Of course, "label" can be whatever you want, and possible be left out (although that is generally not practical). You can also use resb, resw, resd to reserve uninitialisedspace.
LINKER THAT CAN BE USED ALONG WITH NASM IN WINDOWS Hi all, I'm just starting with assembly language and nasm. What linker can be used to link programs assembled using nasm? how can we produce a exe file and run it CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient inADDING TWO NUMBERS
Re: Adding two numbers - user input. « Reply #3 on: June 04, 2013, 09:17:19 PM ». Quote from: TightCoderEx on June 04, 2013, 05:30:56 PM. Let's say you're adding 9 and 3. num1 becomes 39H or 57 and num2 becomes 33H or 51. 57 + 51 = 108 + 48 = 156. So what you're actually printing is character code 156 and depending upon character set itcould
READING GDTR, IDTR AND LDTR IN REAL MODE Re: Reading GDTR, IDTR and LDTR in real mode. Hi! With the release of the 386, protected mode could be exited by loading the segment registers with real mode values, disabling the A20 line and clearing the PE bit in the CR0 register, without the need to NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient in COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILEASSEMBLY LANGUAGE FOR WINDOWS 10CONVERT DMG TO EXE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
ABSOLUTE OR RELATIVE ADDRESSING Re: Absolute or Relative Addressing. It seems that the problem is indeed due to address displacements being wider than 32 bits (due to the Golink linker loading the program at 0x1400000 I think it was). The simple solution apparently is to tell it to load it MULTIPLE SOURCE FILES AND BINARY OUTPUT I'm currently trying to split a large source file into smaller, more manageable units and want to be able to assemble to object files and link to produce initially a .com file (for testing) then a binary file as part of my OS loader. I am able to create OMF object files easily, and MS Link 5.63 appears to link successfully, but the resultin ATTEMPT TO INITIALIZE MEMORY IN BSS SECTION `.BSS': IGNORED Re: attempt to initialize memory in BSS section `.bss': ignored. Doesn't seem like a bug to me. When you rearrange your variables and their respective alignments, you happen to have alignments that are factors of the previous resb, or object file section alignment, for which align will be optimized away, i.e. ignored, thus placating anywarnings.
NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 And if you are using Microsoft Visual Studio to get a C compiler for the NASM .obj files, and want to use their fairly new Powershell command tool rather than the DOS Visual Studio command prompt, you may want to add the directory where their cl.exe is located. Actually there four directories, depending if it is x64 or x86 AND Hostx64 orHostx86.
CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at this page here it is: Code: .next: ; we do need to clear rdx here - "div" uses it. xor rdx, rdx. div rbx;divide by ten. ; quotient in COMPARING THE CONTENTS OF YMM/XMM REGISTERS I am looking for a method to compare the contents of YMM/XMM registers to each other. Anyone have any ideas? I am looking for something quick and easy if it exists. I was poking around with PCMPEQB to set all the bits to 0/1 (creating a 127 bit mask), then using a PMOVMSKB instruction. I can't seem to make this work, so any suggestions? HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILEASSEMBLY LANGUAGE FOR WINDOWS 10CONVERT DMG TO EXE Call it something else (I used "salign"), and I think you'll find that it assembles without complaint. To disassemble this with ndisasm (no point to it): Code: ndisasm -b32 -e0Ch tiny.exe. Further options to ndisasm would prevent it from disassembling the cruft afterthe instructions.
ABSOLUTE OR RELATIVE ADDRESSING Re: Absolute or Relative Addressing. It seems that the problem is indeed due to address displacements being wider than 32 bits (due to the Golink linker loading the program at 0x1400000 I think it was). The simple solution apparently is to tell it to load it MULTIPLE SOURCE FILES AND BINARY OUTPUT I'm currently trying to split a large source file into smaller, more manageable units and want to be able to assemble to object files and link to produce initially a .com file (for testing) then a binary file as part of my OS loader. I am able to create OMF object files easily, and MS Link 5.63 appears to link successfully, but the resultin ATTEMPT TO INITIALIZE MEMORY IN BSS SECTION `.BSS': IGNORED Re: attempt to initialize memory in BSS section `.bss': ignored. Doesn't seem like a bug to me. When you rearrange your variables and their respective alignments, you happen to have alignments that are factors of the previous resb, or object file section alignment, for which align will be optimized away, i.e. ignored, thus placating anywarnings.
NASM - THE NETWIDE ASSEMBLER This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. SIMPLE TEXT RAY-CASTER Hello to all; I have been trying nasm assembly on 64 bit windows for a couple months now, and decided to try at making a very simple text based ray-cast maze. HOW TO CREATE AN ARRAY mov eax, ; x. mov ecx, ; address of array. mov byte , 1 ; modify data. ret. The first example shows how to use "lea" to get the address of a variable on the stack, which I guess is what you're looking for. Best, Frank. Logged. RESERVING SPACE IN NASM CODE FOR LATER DATA Re: reserving space in nasm code for later data. « Reply #1 on: January 10, 2021, 07:43:16 PM ». to save x spaces, you can use. Code: label: times x db 0. Of course, "label" can be whatever you want, and possible be left out (although that is generally not practical). You can also use resb, resw, resd to reserve uninitialisedspace.
HOW DO I MAKE AN EXE? If it isn't needed in my case, hopefully somebody here will be able to let me know. Here are the command lines I used for compiling and linking. Compile command line: Code: nasm -f win32 test.asm. Link command line: Code: alink -oPE -entry main test.objwin32.lib. It
COMMENT - NASM
Hallo allemaal, You can add comment to your ASM using the semicolon ';'. But this works only for one line. In C you can outcomment complete blocks by placing then between /* and */. I NEED A DEBUGGER FOR NASM PROGRAMS Hello everybody Finally I'm writing some assembly programs on Linux, but need a good debugger that supports assembly. Kdbg and DDD run the programs but Kdbg does not trace the code on the source window (just can see how change the registers and the IP register, I have to imagine or trace mentally the code), and DDD does not even show the code and the same thing that only advances IP NASM GENERAL QUESTIONS nasm general questions. « on: August 14, 2013, 01:24:15 AM ». 1. why do some nasm programs (online tutorials) have their main 'global _start', 'global main' only seems to work for me? With 'global _start' nasm returns errors. 2. If i were to sys_write DIFFERENCE BETWEEN MASM AND NASM FOR THE MOV OPCODE. As you can see, NAMS outputs C7 04 25 when MASM outputs C7 05. I don't worry too much about the difference, but it prevents me from comparing binaries, and the same issue happens on most instructions. MOV is just an example. For the life of me, I cannot get NASM to give me the sameoutput.
NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 Author Topic: How to add NASM to `Path` environment variable in Windows 10 (Read 11733 times) COMPARING THE CONTENTS OF YMM/XMM REGISTERS Well, I figured it out pcmpeqb xmm0, xmm1 pmovmskb r15, xmm0 cmp r15, 0xffff jne failed this also seems to work for justvcomisd xmm0, xmm1
HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at thispage here it is:
MULTIPLE SOURCE FILES AND BINARY OUTPUT Hi all I'm currently trying to split a large source file into smaller, more manageable units and want to be able to assemble to object files and link to produce initially a .com file (for testing) then a binary file as part of my OS loader. DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILEASSEMBLY LANGUAGE FOR WINDOWS 10CONVERT DMG TO EXE is this possible? i was reading through the docs and couldnt find a particular way to do this. im able to disassemble a exe but the output seems very different to what nasm looks like. the output was really huge even for a hello world c program i compiled myself. DIFFERENCE BETWEEN MASM AND NASM FOR THE MOV OPCODE. /*This is an excerpt of the result of "nasm -f win64 test.asm" */ test_function: 0000000000000000: C7 04 25 00 00 00 mov dword ptr,0
ATTEMPT TO INITIALIZE MEMORY IN BSS SECTION `.BSS': IGNORED Doesn't seem like a bug to me. When you rearrange your variables and their respective alignments, you happen to have alignments that are factors of the previous resb, or object file section alignment, for which align will be optimized away, i.e. ignored, thus placating any warnings. Your original arrangement triggers an actual alignment (resb 4 followed by align 0x1000) thus issuing those NASMFORUMDOWNLOADDOCSBUGSPATCHESLISTS Welcome. This is the project webpage for the Netwide Assembler (NASM), an asssembler for the x86 CPU architecture portable to nearly every modern platform, and with code generation for many platforms old andnew.
NASM - THE NETWIDE ASSEMBLER Chapter 12: Writing 64-bit Code (Unix, Win64) This chapter attempts to cover some of the common issues involved when writing 64-bit code, to run under Win64 or Unix. HOW TO ADD NASM TO `PATH` ENVIRONMENT VARIABLE IN WINDOWS 10 Author Topic: How to add NASM to `Path` environment variable in Windows 10 (Read 11733 times) COMPARING THE CONTENTS OF YMM/XMM REGISTERS Well, I figured it out pcmpeqb xmm0, xmm1 pmovmskb r15, xmm0 cmp r15, 0xffff jne failed this also seems to work for justvcomisd xmm0, xmm1
HOW DOES THE TEST INSTRUCTION WORK? An ordinance is informed for the enhancement of the goals for the humans. It is parked for the effectiveness of the writemypapers.org for all notified items for the humans. The chance is diffused for their forms for the brisk paces and all challenges for the humans. it is signed for the reforms for the manners for the punctuation for the targeted and all elements for the able men and women of CONVERTING FROM ASCII TO INTEGER Thank you so much it works very good for untested code frank only one mistake but I fixed it for future reference if anyone looks at thispage here it is:
MULTIPLE SOURCE FILES AND BINARY OUTPUT Hi all I'm currently trying to split a large source file into smaller, more manageable units and want to be able to assemble to object files and link to produce initially a .com file (for testing) then a binary file as part of my OS loader. DISASSEMBLING AND THEN REASSEMBLING A WINDOWS EXE FILEASSEMBLY LANGUAGE FOR WINDOWS 10CONVERT DMG TO EXE is this possible? i was reading through the docs and couldnt find a particular way to do this. im able to disassemble a exe but the output seems very different to what nasm looks like. the output was really huge even for a hello world c program i compiled myself. DIFFERENCE BETWEEN MASM AND NASM FOR THE MOV OPCODE. /*This is an excerpt of the result of "nasm -f win64 test.asm" */ test_function: 0000000000000000: C7 04 25 00 00 00 mov dword ptr,0
ATTEMPT TO INITIALIZE MEMORY IN BSS SECTION `.BSS': IGNORED Doesn't seem like a bug to me. When you rearrange your variables and their respective alignments, you happen to have alignments that are factors of the previous resb, or object file section alignment, for which align will be optimized away, i.e. ignored, thus placating any warnings. Your original arrangement triggers an actual alignment (resb 4 followed by align 0x1000) thus issuing those NASM - THE NETWIDE ASSEMBLER This manual documents NASM, the Netwide Assembler: an assembler targetting the Intel x86 series of processors, with portable source. NASM - THE NETWIDE ASSEMBLER Appendix A: Ndisasm. The Netwide Disassembler, NDISASM. A.1 Introduction. The Netwide Disassembler is a small companion program to the Netwide Assembler, NASM. SIMPLE TEXT RAY-CASTER Hello to all; I have been trying nasm assembly on 64 bit windows for a couple months now, and decided to try at making a very simple text based ray-cast maze.NASM OPCODE
> But why on line 3 is the opcode '31' present when an xor on two 32-bit registers should generate an opcode of '33' ? Why? For registers, the encodings are functionally equivalent: NASM GENERAL QUESTIONS mov BYTE , 0 ;1 mov BYTE PTR , 0 ;2 4. What is PTR used for in NASM when there are square brackets ? 5. are registers (EAX, EBX, etc) initially stored with 0? is it pointless to 'mov eax, 0' to set eax to 0 ? 6. 'extern printf' works for me but online tutorials show 'extern _printf' ,etc with a underscore, _printf wont work for me, why is it different for me? HOW TO CREATE AN ARRAY Well, you've got "array" as a "local" variable - on the stack, as you intend - so it won't have an address that we can tell Nasm at assembletime.
COMMENT - NASM
Hallo allemaal, You can add comment to your ASM using the semicolon ';'. But this works only for one line. In C you can outcomment complete blocks by placing then between /* and */. HOW DO I MAKE AN EXE? nasm -hf will give you a list of the output formats that Nasm will produce. As you can see, there are quite a few of them. Most suitable for Windows would be "-f win32" (alias "-f win") or "-f win64". RESERVING SPACE IN NASM CODE FOR LATER DATA What I'm trying to do is reserve a large block of code memory so that I can fill it with data later as the program executes. Currently I canreserve 1,
I NEED A DEBUGGER FOR NASM PROGRAMS Hello everybody Finally I'm writing some assembly programs on Linux, but need a good debugger that supports assembly. Kdbg and DDD run the programs but Kdbg does not trace the code on the source window (just can see how change the registers and the IP register, I have to imagine or trace mentally the code), and DDD does not even show the code and the same thing that only advances IPToggle NASM
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WELCOME
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LICENSE
As of version 2.07, NASM is now under the Simplified (2-clause) BSD license . The details of the license are available in the documentation.LATEST VERSION
STABLE
2.14.02
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2.14.03rc2
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Latest , List
For users of RPM-based Linux distributions (e.g. Fedora, Red Hat, SUSE, ...), you can download the official NASM builds using dnf or yum by installing nasm.repo in your /etc/yum/yum.repos.ddirectory.
DEVELOPMENT TEAM
NASM was originally developed by Simon Tatham and Julian Hall, and is now maintained by a team led by H. Peter Anvin. Currently active team members are:* H. Peter Anvin
* Cyrill Gorcunov
* Chang Seok Bae
* Jim Kukunas
* Frank B. Kotler
... with support from many others, and we are always looking for moredevelopers.
YOUR REPORTS AREN'T GOING TO /DEV/NULL We're looking for your comments, suggestions and, of course, bug-reports. Report any suspicious behavior you encounter to help us improve the NASM for everyone! Please post your messages to the mailing list , or file a bug report.
Don't worry if your report is not immediately addressed, even within the first few days, as this is usual for us. Your report will, however, be recorded and dealt with, of course, as time permits. 1996-2015 The NASM development teamDetails
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