arm64: Make sure COMPAT_FREEBSD32 handles thumb entry point.

If the entry point for the binary executed is a thumb 2 entry point, make
sure we set the PSR_T bit, or the CPU will interpret it as arm32 code and
bad things will happen.

PR: 256899
MFC after: 1 week

This commit is contained in:

Olivier Houchard

2021-06-30 14:50:47 +02:00

parent c1da17a86c

commit 712c060c94

1 changed files with 2 additions and 0 deletions

									
										sys/arm64/arm64/elf32_machdep.c
									
		+2
		
												View File
												
					@@ -258,6 +258,8 @@ freebsd32_setregs(struct thread *td, struct image_params *imgp,

						tf->tf_x[14] = imgp->entry_addr;

						tf->tf_x[14] = imgp->entry_addr;

						tf->tf_elr = imgp->entry_addr;

						tf->tf_elr = imgp->entry_addr;

						tf->tf_spsr = PSR_M_32;

						tf->tf_spsr = PSR_M_32;

						if ((uint32_t)imgp->entry_addr & 1)

							tf->tf_spsr |= PSR_T;

					#ifdef VFP

					#ifdef VFP

						vfp_reset_state(td, pcb);

						vfp_reset_state(td, pcb);