LinuxAsmTools Announcement

Announce:
The http://LinuxAsmTools.net web site has completed its first testing milestone. All programs are still beta, but improving.

Site Description:
LinuxAsmTools is devoted to 32-bit Linux assembler programming for tools running in console or x terminal. The focus is narrowed further by the SFF (small fast friendly) guideline.

Programs Available:

ainfo-0.9.45.tar.gz - example program for tty wrapping functions asmcolor-0.9.45.tar.gz - example program showing color library asmdis-0.9.49.tar.gz - disassembler asmedit-0.9.48.tar.gz - programmers editor for assembly asmfile-0.9.17.tar.gz - file manager asmfind-0.9.46.tar.gz - disk search tool asmlib-0.9.59.tar.gz - library
asmlinks-0.9.47.tar.gz - viewer with links to files asmmenu-0.9.44.tar.gz - example program, provides menu for scripts asmmgr-0.9.49.tar.gz - file manager (being replaced by asmfile) asmplan-0.9.46.tar.gz - todo program asmproject-0.9.44.tar.gz - setup for assembler projects asmpub-0.9.45.tar.gz - extracts documentation from assembler source asmref-0.9.58.tar.gz - help files for assembler asmsrc-0.9.47.tar.gz - generate source for ELF executables asmtimer-0.9.47.tar.gz - simple timer for ELF executables asmtrace-0.9.55.tar.gz - traces kernel calls and disassebler asmview-0.9.52.tar.gz - simple file viewer copy-0.9.06.tar.gz - copy program similiar to DOS copy crt_test-0.9.44.tar.gz - example program, and display test domac-0.9.04.tar.gz - macro processor elfdecode-0.9.47.tar.gz - display of ELF file contents file_browse-0.9.46.tar.gz - file selector fileset-0.9.02.tar.gz - file attribute changer, plus format_doc-0.9.44.tar.gz - example program, modifies text files key_echo-0.9.49.tar.gz - echo keys and check terminfo database minibug-0.9.05.tar.gz - console debugger sort-0.9.44.tar.gz - example program, simple file sort steptest-0.9.44.tar.gz - example program, tests physical fitness tracex-0.9.03.tar.gz - trace x server calls walktest-0.9.44.tar.gz - example program, tests physical fitness

Web Site Contents:
The web site is organized as follows:

whats new
programs
libraries
downloads
puzzles
opinion
tips
sff
about
links

Links:
http://LinuxAsmTools.net
http://[email protected]

Firstly,Thanks for your great job.

These day i study about linker and loader,i meet a problem which make me puzzle.

when i disassemble *.o object file on x86 machine and find instruction "call 0xFCFFFFFF",because not link,but why this address 0xFCFFFFFF not 0xFFFFFFFF or others?

i think must have some results i don't know,plz tell me.Because now young people like me ,most ly don't familiar with assemble and link.

Best Regards.

2008/12/14 jeff <[email protected]>:

First of all, the value is not 0xFCFFFFFF, it's 0xFFFFFFFC (little-endian), which is the 32-bit equivalent of -4.

And the reason for the -4 is that it's an offset. When the linker fills in the real address, it will subtract the subroutine's absolute address from the address of the -4 value to get a relative address, which it will then add to the existing -4 to get the correct relative address for the call instruction. And, the reason that 4 needs to be subtracted is that when the call is executed, it will actually jump from the end of the call instruction, which is 4 bytes ahead of where the relative address is stored.

b

OH~~~ great,thx for u help,that really a tip.

2008/12/19 Brian Raiter <[email protected]>: