linker-scripts

In the man page of nm . It says “A” The symbol's value is absolute, and will not be changed by further linking. However, I don't know what that means. How can I define a variable or something else to make its value absolute in C ? If I declare a variable in test.c in its file scope int a; Then in the output of nm , the entry for a will be the following on my machine 0000000000000004 C a So I'm wondering what can I do to make the nm output “A” for a variable. And I don't know what “absolute” means. When C compiler compiles your program, it produces a list of symbols in addition to the binary

Is there any way to use a linker script with ld on Mac OS X? The GNU ld program on Linux accepts a -T <scriptname> option, but on Mac OS -T is an unknown command option. Using an alternative installation of GCC is okay with me, if that solves the problem. The Fink Project has a document on porting Unix software to Darwin / Mac OS X , it claims that the Darwin linker isn't even based on the GNU linker. I think you will have to read the ld man page to figure out how to do what you want with the native linker or install your own version of the GCC. 来源： https://stackoverflow.com/questions/2051689

My usecase is as follows: I am using a typical SDK that comes with Makefile based projects I belive the linker is patched gcc. gcc --version gives me 4.3.4 SDK defines the linker script (lets call it Linker.ld) Linker.ld includes LinkerMemMap.cfg, which defines the absolute addresses for various sections in the linked ELF image SDK provides application templates based on Makefiles (GNU Make 3.81) and make itself In the SDK provided Makefile template, when gcc is invoked the Linker.ld is provided with -T command line option, as follows: gcc $(OBJS) -l$(Lib1) -l$(Lib2) -nostdlib -lgcc -L$

I have searched far and wide for how to do this and have failed to come up with an answer. My memory layout is as follows: Fake Address | Section 0 | text 7 | relocate 15 | bss 23 | stack At the end of the Stack I place the Heap. Which grows up and the stack is a full descending stack for the ARM chip I am using. Now, what I want to do is place a single section, let's call it .persist , into my ram memory. I want it to reside at the very end of RAM and I want to program this into my linker script. However, this .persist section's size is not defined by me but is computed by the compiler from

I've just started learning some ARM programming and I've got stuck in a slightly annoying problem. The toolchain I'm using to compile my sources is Sourcery CodeBench Lite 2013.05-23 (can be found here: https://sourcery.mentor.com/GNUToolchain/release2449 ) What I would need is to tell GCC or LD or OBJCOPY to put the compiled bytecode of the 'main' function at the beginning of the .text section. Is there any way to achieve this? (maybe through a linker script?) Thank you Solved the problem. For whoever faces it: When compiling with GCC, add the -ffunction-sections option in the command-line.

I have an application, which does a error when I try to run it: /lib/libc.so.6: version `GLIBC_2.7' not found But the only symbol it needs from glibc 2.7 is __isoc99_sscanf@@GLIBC_2.7 I want to write a small single function "library" with this symbol as alias to __sscanf() How can I do this with gcc/ld? My variant is not accepted because "@@" symbols int __isoc99_sscanf@@GLIBC_2.7(const char *, const char *, ...) __attribute__((alias("__sscanf"))); second my variant is #include <stdarg.h> int __isoc99_sscanf1(const char *a, const char *b, va_list args) { int i; va_list ap; va_copy(ap,args); i