On Sat, 21 Aug 2021 at 10:48, Florian Hauschild
<[email protected]> wrote:
>
> This extension covers functions:
> * to read and write guest memory
> * to read and write guest registers
> * to flush tb cache
> * to control single stepping of qemu from plugin
>
> These changes allow the user to
> * collect more information about the behaviour of the system
> * change the guest state with a plugin during execution
> * control cache of tcg
> * allow for precise instrumentation in execution flow
> +
> +static int plugin_read_register(CPUState *cpu, GByteArray *buf, int reg)
> +{
> + CPUClass *cc = CPU_GET_CLASS(cpu);
> + if (reg < cc->gdb_num_core_regs) {
> + return cc->gdb_read_register(cpu, buf, reg);
> + }
> + return 0;
> +}
At the point where these functions execute is the emulation
definitely stopped (ie no register values currently held
live in TCG locals) ?
-- PMM
