Probe for existence of the bvm debug port instead of just assuming that it is
always present. Suggested by: grehan Obtained from: NetApp
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parent
e365fca6c8
commit
1ea1e18490
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/projects/bhyve/; revision=242194
@ -49,6 +49,8 @@ GDB_DBGPORT(bvm, bvm_dbg_probe, bvm_dbg_init, bvm_dbg_term,
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#define BVM_DBG_PORT 0x224
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static int bvm_dbg_port = BVM_DBG_PORT;
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#define BVM_DBG_SIG ('B' << 8 | 'V')
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static int
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bvm_dbg_probe(void)
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{
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@ -56,17 +58,21 @@ bvm_dbg_probe(void)
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disabled = 0;
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resource_int_value("bvmdbg", 0, "disabled", &disabled);
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if (disabled)
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return (-1);
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if (resource_int_value("bvmdbg", 0, "port", &port) == 0)
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bvm_dbg_port = port;
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if (!disabled) {
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if (resource_int_value("bvmdbg", 0, "port", &port) == 0)
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bvm_dbg_port = port;
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/*
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* Return a higher priority than 0 to override other
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* gdb dbgport providers that may be present (e.g. uart)
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*/
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return (1);
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if (inw(bvm_dbg_port) == BVM_DBG_SIG) {
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/*
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* Return a higher priority than 0 to override other
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* gdb dbgport providers that may be present (e.g. uart)
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*/
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return (1);
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}
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}
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return (-1);
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}
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static void
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