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27 March 2024, 02:37:15 UTC
Revision ee72e0e70cf7c846a4e0b6160f771da8f68571dc authored by Vincent Chen on 05 March 2019, 03:23:34 UTC, committed by Palmer Dabbelt on 17 May 2019, 03:42:12 UTC 
riscv: Add the support for c.ebreak check in is_valid_bugaddr()
 
The macro __BUG_INSN currently is defined as the "ebreak" opcode.
The is_valid_bugaddr() function compares the instruction pointed to by
$sepc with macro __BUG_INSN to check whether the current trap exception
is caused by an "ebreak" instruction. However, this check flow is possibly
erroneous because if C extension is supported, the expected trap
instruction "ebreak" is possibly translated to "c.ebreak" by the assembler.
Therefore, it requires a mechanism to distinguish the length of the
instruction in $spec and compare it to the correct trap instruction.

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
1 parent d18ebc2
History
Tip revision: ee72e0e70cf7c846a4e0b6160f771da8f68571dc authored by Vincent Chen on 05 March 2019, 03:23:34 UTC
riscv: Add the support for c.ebreak check in is_valid_bugaddr()
Tip revision: ee72e0e
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