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authorVincent Chen <vincentc@andestech.com>2019-03-05 04:23:34 +0100
committerPalmer Dabbelt <palmer@sifive.com>2019-05-17 05:42:12 +0200
commitee72e0e70cf7c846a4e0b6160f771da8f68571dc (patch)
treed08fef2622f07eb5df0825c147348fe149c696f3 /Kbuild
parentriscv: support trap-based WARN() (diff)
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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>
Diffstat (limited to 'Kbuild')
0 files changed, 0 insertions, 0 deletions