Hi
When I use gdb debug get_unmapped_area on qemumips64, I found a strange
phenomenon:
file: mm/mmap.c
function: get_unmapped_area
line: addr = get_area(file, addr, len, pgoff, flags);
This return -22, I want to find where return -22,
then I step in get_area:
(gdb) s
shmem_get_unmapped_area (file=0x900000000888b000,
uaddr=18446744073709547520, len=4096, pgoff=0, flags=17) at
/usr/src/kernel/mm/shmem.c:2043
2043 /usr/src/kernel/mm/shmem.c: No such file or directory.
(gdb) n
arch_get_unmapped_area_topdown (filp=0x900000000888b000,
addr0=18446744073709547520, len=4096, pgoff=0, flags=17) at
/usr/src/kernel/arch/mips/mm/mmap.c:142
142 /usr/src/kernel/arch/mips/mm/mmap.c: No such file or directory.
(gdb) n
143 in /usr/src/kernel/arch/mips/mm/mmap.c
(gdb) n
arch_get_unmapped_area_common (filp=0x900000000888b000,
addr0=18446744073709547520, len=4096, pgoff=0, flags=17, dir=DOWN) at
/usr/src/kernel/arch/mips/mm/mmap.c:59
59 in /usr/src/kernel/arch/mips/mm/mmap.c
(gdb) n
66 in /usr/src/kernel/arch/mips/mm/mmap.c
Why it jump three three function?
shmem_get_unmapped_area
arch_get_unmapped_area_topdown
arch_get_unmapped_area_common
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
