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backtrace/unwind: add more unwind instruction support 

Signed-off-by: chao an <anchao@xiaomi.com>
This commit is contained in:
chao an 2023-09-14 16:42:05 +08:00 committed by Xiang Xiao
parent b52070a70e
commit 9f049b47bf
1 changed files with 56 additions and 0 deletions
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56
arch/arm/src/common/arm_backtrace_unwind.c
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@ -432,6 +432,62 @@ static int unwind_exec_content(struct unwind_ctrl_s *ctrl)
ctrl->vrs[SP] += 0x204 + (uleb128 << 2);
}
else if (content == 0xb3 || content == 0xc8 || content == 0xc9)
{
unsigned long reg_from;
unsigned long reg_to;
unsigned long mask;
unsigned long *vsp = (unsigned long *)ctrl->vrs[SP];
int i;
mask = unwind_get_byte(ctrl);
if (mask == 0)
{
return -1;
}
reg_from = (mask & 0xf0) >> 4;
reg_to = reg_from + (mask & 0x0f);
if (content == 0xc8)
{
reg_from += 16;
reg_to += 16;
}
for (i = reg_from; i <= reg_to; i++)
{
vsp += 2;
}
if (content == 0xb3)
{
vsp++;
}
ctrl->vrs[SP] = (unsigned long)vsp;
}
else if ((content & 0xf8) == 0xb8 || (content & 0xf8) == 0xd0)
{
unsigned long reg_to;
unsigned long mask = content & 0x07;
unsigned long *vsp = (unsigned long *)ctrl->vrs[SP];
int i;
reg_to = 8 + mask;
for (i = 8; i <= reg_to; i++)
{
vsp += 2;
}
if ((content & 0xf8) == 0xb8)
{
vsp++;
}
ctrl->vrs[SP] = (unsigned long)vsp;
}
else
{
ret = -1;