diff options
Diffstat (limited to 'kexec/arch/ppc/kexec-uImage-ppc.c')
| -rw-r--r-- | kexec/arch/ppc/kexec-uImage-ppc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kexec/arch/ppc/kexec-uImage-ppc.c b/kexec/arch/ppc/kexec-uImage-ppc.c index 1d71374..b5579f0 100644 --- a/kexec/arch/ppc/kexec-uImage-ppc.c +++ b/kexec/arch/ppc/kexec-uImage-ppc.c @@ -228,6 +228,23 @@ static int ppc_load_bare_bits(int argc, char **argv, const char *buf, /* No allocation past here in order not to overwrite the stack */ #undef PUL_STACK_SIZE + /* + * Fixup ThreadPointer(r2) for purgatory. + * PPC32 ELF ABI expects : + * ThreadPointer (TP) = TCB + 0x7000 + * We manually allocate a TCB space and set the TP + * accordingly. + */ +#define TCB_SIZE 1024 +#define TCB_TP_OFFSET 0x7000 /* PPC32 ELF ABI */ + addr = locate_hole(info, TCB_SIZE, 0, 0, + ((unsigned long)-1 - TCB_TP_OFFSET), + 1); + addr += TCB_SIZE + TCB_TP_OFFSET; + elf_rel_set_symbol(&info->rhdr, "my_thread_ptr", &addr, sizeof(addr)); +#undef TCB_TP_OFFSET +#undef TCB_SIZE + addr = elf_rel_get_addr(&info->rhdr, "purgatory_start"); info->entry = (void *)addr; |