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Signed-off-by: Qing Zhang --- arch/loongarch/include/asm/setup.h | 2 +- arch/loongarch/kernel/head.S | 10 +++++----- arch/loongarch/kernel/relocate.c | 8 ++------ 3 files changed, 8 insertions(+), 12 deletions(-) diff --git a/arch/loongarch/include/asm/setup.h b/arch/loongarch/include/asm/setup.h index be05c0e706a2..2dca0d1dd90a 100644 --- a/arch/loongarch/include/asm/setup.h +++ b/arch/loongarch/include/asm/setup.h @@ -33,7 +33,7 @@ extern long __la_abs_end; extern long __rela_dyn_begin; extern long __rela_dyn_end; -extern void * __init relocate_kernel(void); +extern unsigned long __init relocate_kernel(void); #endif diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S index aa64b179744f..35c4a78614c3 100644 --- a/arch/loongarch/kernel/head.S +++ b/arch/loongarch/kernel/head.S @@ -95,12 +95,12 @@ SYM_CODE_START(kernel_entry) # kernel entry point PTR_LI sp, (_THREAD_SIZE - PT_SIZE) PTR_ADD sp, sp, tp set_saved_sp sp, t0, t1 -#endif - - /* relocate_kernel() returns the new kernel entry point */ - jr a0 - ASM_BUG() + /* Jump to new kernel: new_pc = current_pc + random_offset */ + pcaddi t0, 0 + add.d t0, t0, a0 + jirl zero, t0, 0xc +#endif #endif bl start_kernel diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c index 01f94d1e3edf..6c3eff9af9fb 100644 --- a/arch/loongarch/kernel/relocate.c +++ b/arch/loongarch/kernel/relocate.c @@ -157,12 +157,11 @@ static inline void __init update_reloc_offset(unsigned long *addr, long random_o *new_addr = (unsigned long)reloc_offset; } -void * __init relocate_kernel(void) +unsigned long __init relocate_kernel(void) { unsigned long kernel_length; unsigned long random_offset = 0; void *location_new = _text; /* Default to original kernel start */ - void *kernel_entry = start_kernel; /* Default to original kernel entry point */ char *cmdline = early_ioremap(fw_arg1, COMMAND_LINE_SIZE); /* Boot command line is passed in fw_arg1 */ strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE); @@ -190,9 +189,6 @@ void * __init relocate_kernel(void) reloc_offset += random_offset; - /* Return the new kernel's entry point */ - kernel_entry = RELOCATED_KASLR(start_kernel); - /* The current thread is now within the relocated kernel */ __current_thread_info = RELOCATED_KASLR(__current_thread_info); @@ -204,7 +200,7 @@ void * __init relocate_kernel(void) relocate_absolute(random_offset); - return kernel_entry; + return random_offset; } /* -- 2.20.1