This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

will GNU printf() use malloc?

pt tam over 20 years ago

I am calling GNU's printf and I find that the elf out contains following segment:

 .data          0x000802f4      0x444 c:/gnu/pc-cygwin/arm-elf/lib/libc.a(mallocr.o)
                0x00080700                __malloc_top_pad
                0x00080708                __malloc_max_sbrked_mem
                0x00080704                __malloc_sbrk_base
                0x00080710                __malloc_current_mallinfo
                0x000802f4                __malloc_av_
                0x0008070c                __malloc_max_total_mem
                0x000806fc                __malloc_trim_threshold
                0x00080740                .=ALIGN(0x10)

from the linker map file, I see freer.o and mallocr.o is also linked because wsetup.o references to them. Does GNU's vsprinf() use malloc?!

Do I miss anything? I do not want to use malloc in my design. Thanks.

Parents

0 pt tam over 20 years ago in reply to Keil Software Support Intl.

Thanks, Reinhard Keil

So you means that the samples in c:\Keil\ARM\GNU\Examples\Measure will eventually call malloc() too?

and what is the functionality of syscall.c? What if I don't include this? Is it for the sake of removing GNU's dummy functions?
Cancel
Vote up 0 Vote down

Cancel

Reply

0 pt tam over 20 years ago in reply to Keil Software Support Intl.

Thanks, Reinhard Keil

So you means that the samples in c:\Keil\ARM\GNU\Examples\Measure will eventually call malloc() too?

and what is the functionality of syscall.c? What if I don't include this? Is it for the sake of removing GNU's dummy functions?
Cancel
Vote up 0 Vote down

Cancel

Children

0 Keil Software Support Intl. over 20 years ago in reply to pt tam

As far as I remember, printf itself does not require malloc. However scanf requires it.

For the rest you your questions, you should read the Getting Started User's Guide.

Reinhard
Cancel
Vote up 0 Vote down

Cancel