how the function“tee_entry_std(struct thread_smc_args *smc_args)“be called

[clark-chen]

i knew "tee_entry_std"is the entry point of the TA,when a SMC come.

optee_os/core/arch/arm/tee/entry_std.c

Line 340 in b5acd53

void tee_entry_std(struct thread_smc_args *smc_args)

and i find in struct handlers also with it.
static const struct thread_handlers handlers = { .std_smc = tee_entry_std, .fast_smc = tee_entry_fast, .nintr = main_fiq,
but i still donot understand where did the parameter (struct thread_smc_args *smc_args) come frome. and when the function tee_entry_std to execute.
thanks for your help!

[jenswikl]

Hi,

Take a look in vector_std_smc_entry() and vector_fast_smc_entry() in core/arch/arm/kernel/thread_a{32,64}.S

[clark-chen]

thanks，
i want to assign different address spaces for different TAs in optee_os, so could you tell me the memory allocation process of TAs.
my platform is foundation fvp, thanks for your answer.

[jenswikl]

TAs (user TAs that is, for pseudo TAs it would make sense) already have separate address spaces.

[clark-chen]

ok, could you please point out where is the code ,thank you very much!
what i mean above is different TA has different address space.

[jenswikl]

If you study load_elf() in core/arch/arm/kernel/user_ta.c you'll find it.

[clark-chen]

as i know, There are two ways to implement Trusted Applications (TAs),Pseudo TAs and Dynamically Loaded TAs, Do you mean user TAs is the same with Dynamically Loaded TAs?
https://github.com/OP-TEE/optee_os/blob/5acb1bc6e8ece254ffe7dbdc41605ad5613b6ab7/documentation/optee_design.md#pseudo-tas-and-dynamically-loaded-tas

[jenswikl]

Yes

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