start of text section in the ELF executable and in the Virtual Memory

[asp imho]

Hi all,

I've a generic question about how the program looks before and after it is
loaded into the memory.

I see that the TEXT_START_ADDR = 0x08048000 (found this in
~src/contrib/binutils/ld/emulparams/elf_i386.sh)

when I do a procstat -v <PID>, I see some thing like this

PID            START                END                       PRT .........
PATH
2126          0x8048000          0x0804a000           r-x    .........
/bin/cat


I see that the VM address is same as that of the TEXT_START_ADDR. Does this
mean that the actual begining of the program statement, `cat` in this case,
has a VM address of 0x8048000.

Looking at the Permission Flags (PRT = r-x) I assumed this is the text
section.

But when I do a objdump of /bin/cat (cmd: `objdump -D /bin/cat`), I see
that there is a section named `.interp` starting at 0x8048134 and not
0x8048000. And the .text section starts from 0x8048b40 and there is no
instruction at address 0x8048000. Can someone please tell me why is this
so?  and what exactly will be present in the memory from 0x8048000 and
0x8048134.

Thanks.