STRUCT SGX_ENCLAVE_MODIFY_TYPES(9)

💖 NAME 💖

bestie, you just opened the struct sgx_...modify_types(9) page in the Kernel API Manual, and it's all about this cutie: struct sgx_enclave_modify_types — the parameters for ioctl %SGX_IOC_ENCLAVE_MODIFY_TYPES. slay.

✨ SYNOPSIS ✨

struct sgx_enclave_modify_types {
    __u64 offset;
    __u64 length;
    __u64 page_type;
    __u64 result;
    __u64 count;
};

🫶 Members 🫶

okay so here's the member-by-member tea, no cap:

• offset — the starting page offset, and bestie it's page aligned relative to the enclave base address defined in SECS. literally important.
• length — length of memory, and it's a multiple of the page size. periodt.
• page_type — the new type for pages in the range described by offset and length. iconic range behavior.
• result — (output) SGX result code of the ENCLS[EMODT] function. yes, that's the exact one.
• count — (output) bytes successfully changed, multiple of page size. the way this tracks what actually changed? obsessed.

🔥 SEE ALSO 🔥

your bestie should also peek at these, fr fr:

• Kernel file: ./arch/x86/include/uapi/asm/sgx.h
• enum sgx_page_flags(9)
• struct sgx_enclave_create(9)
• struct sgx_enclave_add_pages(9)
• struct sgx_enclave_init(9)
• struct sgx_enclave_provision(9)
• struct sgx_enclave_restrict_permissions(9)
• struct sgx_enclave_remove_pages(9)
• sgx_enclave_user_handler_t(9)
• struct sgx_enclave_run(9)
• vdso_sgx_enter_enclave_t(9)

okay bye bestie 💖 this page lives in ./arch/x86/include/uapi/asm, it's dated October 2026, and the header title is struct sgx_...modify_types(9) — mwah 💋✨