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plugins/api: expose symbol lookup to plugins

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This is a quality of life helper for plugins so they don't need to
re-implement symbol lookup when dumping an address. The strings are
constant so don't need to be duplicated. One minor tweak is to return
NULL instead of a zero length string to show lookup failed.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Message-Id: <20210608040532.56449-2-ma.mandourr@gmail.com>
Message-Id: <20210623102749.25686-8-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2021-06-23 11:27:48 +01:00
parent f101c9fe29
commit 7c4ab60f18
2 changed files with 15 additions and 0 deletions
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9
include/qemu/qemu-plugin.h
View File

@ -525,6 +525,15 @@ qemu_plugin_register_vcpu_syscall_ret_cb(qemu_plugin_id_t id,
char *qemu_plugin_insn_disas(const struct qemu_plugin_insn *insn);
/**
* qemu_plugin_insn_symbol() - best effort symbol lookup
* @insn: instruction reference
*
* Return a static string referring to the symbol. This is dependent
* on the binary QEMU is running having provided a symbol table.
*/
const char *qemu_plugin_insn_symbol(const struct qemu_plugin_insn *insn);
/**
* qemu_plugin_vcpu_for_each() - iterate over the existing vCPU
* @id: plugin ID

6
plugins/api.c
View File

@ -233,6 +233,12 @@ char *qemu_plugin_insn_disas(const struct qemu_plugin_insn *insn)
return plugin_disas(cpu, insn->vaddr, insn->data->len);
}
const char *qemu_plugin_insn_symbol(const struct qemu_plugin_insn *insn)
{
const char *sym = lookup_symbol(insn->vaddr);
return sym[0] != 0 ? sym : NULL;
}
/*
* The memory queries allow the plugin to query information about a
* memory access.