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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)) if (is_jal_jalr_jr_ins(ip))
break; break;
if (is_sp_move_ins(ip)) { if (!info->frame_size) {
if (info->frame_size) if (is_sp_move_ins(ip))
continue; info->frame_size = - ip->i_format.simmediate;
info->frame_size = - ip->i_format.simmediate; continue;
} }
if (info->pc_offset == -1 && is_ra_save_ins(ip)) {
if (is_ra_save_ins(ip)) {
if (info->pc_offset != -1)
continue;
info->pc_offset = info->pc_offset =
ip->i_format.simmediate / sizeof(long); ip->i_format.simmediate / sizeof(long);
break;
} }
} }
if (info->frame_size && info->pc_offset >= 0) /* nested */ if (info->frame_size && info->pc_offset >= 0) /* nested */