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Commit 0cceb4aa authored by Franck Bui-Huu's avatar Franck Bui-Huu Committed by Ralf Baechle
Browse files

[MIPS] Make get_frame_info() more robust 



Now get_frame_info() wants to detect move sp instruction first. It
assumes that the save ra in the stack instruction can't happen
before allocating frame size space into the stack.

Signed-off-by: default avatarFranck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 1666a6fc

arch/mips/kernel/process.c

+6 −8
Original line number Diff line number Diff line
@@ -321,17 +321,15 @@ static int get_frame_info(struct mips_frame_info *info) 


		if (is_jal_jalr_jr_ins(ip))

			break;

		if (is_sp_move_ins(ip)) {

			if (info->frame_size)

				continue;

		if (!info->frame_size) {

			if (is_sp_move_ins(ip))

				info->frame_size = - ip->i_format.simmediate;

		}



		if (is_ra_save_ins(ip)) {

			if (info->pc_offset != -1)

			continue;

		}

		if (info->pc_offset == -1 && is_ra_save_ins(ip)) {

			info->pc_offset =

				ip->i_format.simmediate / sizeof(long);

			break;

		}

	}

	if (info->frame_size && info->pc_offset >= 0) /* nested */