linux-sgx-trts-modified/sdk/simulation/uinst/linux/set_tls.c

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/**
 * set_tls.c
 *   Implemente the TLS support in simulation mode
 */

#include "td_mngr.h"
#include "util.h"

int td_mngr_set_td(void *enclave_base, tcs_t *tcs)
{
    dtv_t* dtv;
    tcs_sim_t *tcs_sim;

    if (!tcs)
        return 0;

    /* save the old DTV[0].pointer->val */
    dtv = GET_DTV();
    tcs_sim = (tcs_sim_t *)tcs->reserved;
    tcs_sim->saved_dtv = (uintptr_t)read_dtv_val(dtv);

    /* save the old fs:0x0 or gs:0x0 value */
    tcs_sim->saved_fs_gs_0 = GET_FS_GS_0();

    /* set the DTV[0].pointer->val to TLS address */
    uintptr_t *tib = GET_PTR(uintptr_t, enclave_base, tcs->ofs_base);
    set_dtv_val(dtv, tib);

    /* set the fs:0x0 or gs:0x0 to TLS address */
    SET_FS_GS_0(tib);
    return 1;
}

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