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[MIPS] Make get_frame_info() more robust

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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: Franck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Franck Bui-Huu 2006-08-03 09:29:20 +02:00 committed by Ralf Baechle
parent 1666a6fc73
commit 0cceb4aa9a
1 changed files with 6 additions and 8 deletions
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14
arch/mips/kernel/process.c
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@ -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;
info->frame_size = - ip->i_format.simmediate;
if (!info->frame_size) {
if (is_sp_move_ins(ip))
info->frame_size = - ip->i_format.simmediate;
continue;
}
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 */