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arm: Fix handling of undefined instructions in kernel mode

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Only panic if no undefined instruction handler matched the exception.
This can arise in practice if the VFP is enabled lazily.

While here, fix the panic string to not include a newline.

Reviewed by:	andrew
Obtained from:	Stormshield
Sponsored by:	Klara, Inc.
Sponsored by:	Stormshield
Differential Revision:	https://reviews.freebsd.org/D42970

(cherry picked from commit ecc2e6deae71b69a30bf3b7e3354aba002a37d69)
This commit is contained in:
Mark Johnston 2023-12-11 09:08:08 -05:00
parent 1126dcdf40
commit bc394ad824
1 changed files with 4 additions and 4 deletions
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8
sys/arm/arm/undefined.c
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@ -343,11 +343,11 @@ undefinedinstruction(struct trapframe *frame)
#else
printf("No debugger in kernel.\n");
#endif
return;
}
else
panic("Undefined instruction in kernel (0x%08x).\n",
} else if (uh == NULL) {
panic("Undefined instruction in kernel (0x%08x)",
fault_instruction);
}
return;
}
userret(td, frame);