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arm unwind: Reject unaligned stack pointers

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Reviewed by:	andrew
Differential Revision:	https://reviews.freebsd.org/D41533
This commit is contained in:
John Baldwin 2023-08-25 12:00:37 -07:00
parent 6f3947be2a
commit 247e8662d2
1 changed files with 9 additions and 0 deletions
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9
sys/arm/arm/unwind.c
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@ -398,6 +398,9 @@ unwind_exec_insn(struct unwind_state *state)
if (mask == 0)
return 1;
if (!__is_aligned(vsp, sizeof(register_t)))
return 1;
/* Update SP */
update_vsp = 1;
@ -430,6 +433,9 @@ unwind_exec_insn(struct unwind_state *state)
/* Read how many registers to load */
count = insn & INSN_POP_COUNT_MASK;
if (!__is_aligned(vsp, sizeof(register_t)))
return 1;
/* Update sp */
update_vsp = 1;
@ -460,6 +466,9 @@ unwind_exec_insn(struct unwind_state *state)
if (mask == 0 || (mask & 0xf0) != 0)
return 1;
if (!__is_aligned(vsp, sizeof(register_t)))
return 1;
/* Update SP */
update_vsp = 1;