How to load Kernel elf file?
I'm competing Brokenthorn Osdev seriese tutorials where I create a stage1.bin (assembled by nasm) and put it to first sector of disk using dd. Its job is to load stage2 bootloader (also assembled by nasm and pasted on disk). Until now I was loading a PE file (the kernel) compiled by Visual Studio and it was working fine but now I've build Kernel using gcc which creates elf file. I got this elf file's entry point address but when I call this address it doesn't execute file. Upon reading it with READELF command I found out and the field ENTRY (which contains entry point address of elf file) was set to 0. How can I load an 
elf file when its entry address is 0?
operating-system kernel elf bootloader entry-point
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
add a comment |
I'm competing Brokenthorn Osdev seriese tutorials where I create a stage1.bin (assembled by nasm) and put it to first sector of disk using dd. Its job is to load stage2 bootloader (also assembled by nasm and pasted on disk). Until now I was loading a PE file (the kernel) compiled by Visual Studio and it was working fine but now I've build Kernel using gcc which creates elf file. I got this elf file's entry point address but when I call this address it doesn't execute file. Upon reading it with READELF command I found out and the field ENTRY (which contains entry point address of elf file) was set to 0. How can I load an elf file when its entry address is 0?
operating-system kernel elf bootloader entry-point
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
1
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40
add a comment |
I'm competing Brokenthorn Osdev seriese tutorials where I create a stage1.bin (assembled by nasm) and put it to first sector of disk using dd. Its job is to load stage2 bootloader (also assembled by nasm and pasted on disk). Until now I was loading a PE file (the kernel) compiled by Visual Studio and it was working fine but now I've build Kernel using gcc which creates elf file. I got this elf file's entry point address but when I call this address it doesn't execute file. Upon reading it with READELF command I found out and the field ENTRY (which contains entry point address of elf file) was set to 0. How can I load an elf file when its entry address is 0?
operating-system kernel elf bootloader entry-point
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
I'm competing Brokenthorn Osdev seriese tutorials where I create a stage1.bin (assembled by nasm) and put it to first sector of disk using dd. Its job is to load stage2 bootloader (also assembled by nasm and pasted on disk). Until now I was loading a PE file (the kernel) compiled by Visual Studio and it was working fine but now I've build Kernel using gcc which creates elf file. I got this elf file's entry point address but when I call this address it doesn't execute file. Upon reading it with READELF command I found out and the field ENTRY (which contains entry point address of elf file) was set to 0. How can I load an elf file when its entry address is 0?
operating-system kernel elf bootloader entry-point
operating-system kernel elf bootloader entry-point
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
asked Nov 26 '18 at 12:17
Amir KhanAmir Khan
104
104
Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
1
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40
add a comment |
Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
1
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40
Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
1
1
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40
add a comment |
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Possible duplicate of stackoverflow.com/questions/13908276/…
– xmojmr
Nov 26 '18 at 13:22
1
You are looking at the contents of an ELF object. Did you link your files into an ELF executable?
– Michael Petch
Nov 26 '18 at 15:39
I realy don't know much about ELF files. As you mentioned above, I don't know difference between ELF objects and linking to ELF executable (I'll appreciate if you explain these terms a bit). I created a .c file and compiled it using gcc cross compiler which generates ELF output file.
– Amir Khan
Nov 26 '18 at 16:40