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sgx_main.c
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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/* Copyright (C) 2014 Stony Brook University
* Copyright (C) 2020 Intel Corporation
* Michał Kowalczyk <[email protected]>
* Copyright (C) 2020 Invisible Things Lab
* Michał Kowalczyk <[email protected]>
*/
/* FIXME: Sorting+re-grouping includes here causes tons of
* "../../../include/sysdeps/generic/ldsodefs.h:30:32: error: unknown type name ‘Elf__ELF_NATIVE_CLASS_Addr’
* #define ElfW(type) _ElfW(Elf, __ELF_NATIVE_CLASS, type)"
* errors.
*/
#include "pal_internal-arch.h"
#include "pal_linux.h"
#include "pal_linux_error.h"
#include "pal_rtld.h"
#include "hex.h"
#include "toml.h"
#include "topo_info.h"
#include "debug_map.h"
#include "gdb_integration/sgx_gdb.h"
#include "linux_utils.h"
#include "rpc_queue.h"
#include "sgx_api.h"
#include "sgx_enclave.h"
#include "sgx_internal.h"
#include "sgx_log.h"
#include "sgx_tls.h"
#include <asm/errno.h>
#include <asm/fcntl.h>
#include <asm/socket.h>
#include <ctype.h>
#include <linux/fs.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <sys/auxv.h>
#include "sysdeps/generic/ldsodefs.h"
size_t g_page_size = PRESET_PAGESIZE;
char* g_pal_loader_path = NULL;
char* g_libpal_path = NULL;
struct pal_enclave g_pal_enclave;
/*
* FIXME: the ELF-parsing functions in this file (scan_enclave_binary, load_enclave_binary) assume
* that all the program headers will be found within first FILEBUF_SIZE bytes. This will be true for
* most binaries, but is not guaranteed.
*
* (Glibc also allocates such a buffer but recovers when it's too small, see elf/dl-load.c in glibc
* sources.)
*/
static int scan_enclave_binary(int fd, unsigned long* base, unsigned long* size,
unsigned long* entry) {
int ret = 0;
if (IS_ERR(ret = INLINE_SYSCALL(lseek, 3, fd, 0, SEEK_SET)))
return ret;
char filebuf[FILEBUF_SIZE];
ret = INLINE_SYSCALL(read, 3, fd, filebuf, FILEBUF_SIZE);
if (IS_ERR(ret))
return ret;
if ((size_t)ret < sizeof(ElfW(Ehdr)))
return -ENOEXEC;
const ElfW(Ehdr)* header = (void*)filebuf;
const ElfW(Phdr)* phdr = (void*)filebuf + header->e_phoff;
const ElfW(Phdr)* ph;
if (memcmp(header->e_ident, ELFMAG, SELFMAG) != 0)
return -ENOEXEC;
struct loadcmd {
ElfW(Addr) mapstart, mapend;
} loadcmds[16], *c;
int nloadcmds = 0;
for (ph = phdr; ph < &phdr[header->e_phnum]; ph++)
if (ph->p_type == PT_LOAD) {
if (nloadcmds == 16)
return -EINVAL;
c = &loadcmds[nloadcmds++];
c->mapstart = ALLOC_ALIGN_DOWN(ph->p_vaddr);
c->mapend = ALLOC_ALIGN_UP(ph->p_vaddr + ph->p_memsz);
}
*base = loadcmds[0].mapstart;
*size = loadcmds[nloadcmds - 1].mapend - loadcmds[0].mapstart;
if (entry)
*entry = header->e_entry;
return 0;
}
static int load_enclave_binary(sgx_arch_secs_t* secs, int fd, unsigned long base,
unsigned long prot) {
int ret = 0;
if (IS_ERR(ret = INLINE_SYSCALL(lseek, 3, fd, 0, SEEK_SET)))
return ret;
char filebuf[FILEBUF_SIZE];
ret = INLINE_SYSCALL(read, 3, fd, filebuf, FILEBUF_SIZE);
if (IS_ERR(ret))
return ret;
const ElfW(Ehdr)* header = (void*)filebuf;
const ElfW(Phdr)* phdr = (void*)filebuf + header->e_phoff;
const ElfW(Phdr)* ph;
struct loadcmd {
ElfW(Addr) mapstart, mapend, datastart, dataend, allocend;
unsigned int mapoff;
int prot;
} loadcmds[16], *c;
int nloadcmds = 0;
for (ph = phdr; ph < &phdr[header->e_phnum]; ph++)
if (ph->p_type == PT_LOAD) {
if (nloadcmds == 16)
return -EINVAL;
c = &loadcmds[nloadcmds++];
c->mapstart = ALLOC_ALIGN_DOWN(ph->p_vaddr);
c->mapend = ALLOC_ALIGN_UP(ph->p_vaddr + ph->p_filesz);
c->datastart = ph->p_vaddr;
c->dataend = ph->p_vaddr + ph->p_filesz;
c->allocend = ph->p_vaddr + ph->p_memsz;
c->mapoff = ALLOC_ALIGN_DOWN(ph->p_offset);
c->prot = (ph->p_flags & PF_R ? PROT_READ : 0) | (ph->p_flags & PF_W ? PROT_WRITE : 0) |
(ph->p_flags & PF_X ? PROT_EXEC : 0) | prot;
}
base -= loadcmds[0].mapstart;
for (c = loadcmds; c < &loadcmds[nloadcmds]; c++) {
ElfW(Addr) zero = c->dataend;
ElfW(Addr) zeroend = ALLOC_ALIGN_UP(c->allocend);
ElfW(Addr) zeropage = ALLOC_ALIGN_UP(zero);
if (zeroend < zeropage)
zeropage = zeroend;
if (c->mapend > c->mapstart) {
void* addr = (void*)INLINE_SYSCALL(mmap, 6, NULL, c->mapend - c->mapstart,
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FILE, fd,
c->mapoff);
if (IS_ERR_P(addr))
return -ERRNO_P(addr);
if (c->datastart > c->mapstart)
memset(addr, 0, c->datastart - c->mapstart);
if (zeropage > zero)
memset(addr + zero - c->mapstart, 0, zeropage - zero);
ret = add_pages_to_enclave(secs, (void*)base + c->mapstart, addr,
c->mapend - c->mapstart,
SGX_PAGE_REG, c->prot, /*skip_eextend=*/false,
(c->prot & PROT_EXEC) ? "code" : "data");
INLINE_SYSCALL(munmap, 2, addr, c->mapend - c->mapstart);
if (ret < 0)
return ret;
}
if (zeroend > zeropage) {
ret = add_pages_to_enclave(secs, (void*)base + zeropage, NULL, zeroend - zeropage,
SGX_PAGE_REG, c->prot, false, "bss");
if (ret < 0)
return ret;
}
}
return 0;
}
static int initialize_enclave(struct pal_enclave* enclave, const char* manifest_to_measure) {
int ret = 0;
int enclave_image = -1;
sgx_arch_token_t enclave_token;
sgx_arch_enclave_css_t enclave_sigstruct;
sgx_arch_secs_t enclave_secs;
unsigned long enclave_entry_addr;
unsigned long enclave_heap_min;
int enclave_mem = -1;
/* this array may overflow the stack, so we allocate it in BSS */
static void* tcs_addrs[MAX_DBG_THREADS];
enclave_image = INLINE_SYSCALL(open, 3, enclave->libpal_uri + URI_PREFIX_FILE_LEN, O_RDONLY, 0);
if (IS_ERR(enclave_image)) {
urts_log_error("Cannot find enclave image: %s\n", enclave->libpal_uri);
ret = enclave_image;
goto out;
}
if (enclave->nonpie_binary) {
/* executable is non-PIE: enclave base address must cover code segment loaded at some
* hardcoded address (usually 0x400000), and heap cannot start at zero (modern OSes do not
* allow this) */
enclave->baseaddr = DEFAULT_ENCLAVE_BASE;
enclave_heap_min = MMAP_MIN_ADDR;
} else {
/* executable is PIE: enclave base address can be arbitrary (we choose it same as
* enclave_size), and heap can start immediately at this base address */
enclave->baseaddr = enclave->size;
enclave_heap_min = enclave->baseaddr;
}
ret = read_enclave_token(enclave->token, &enclave_token);
if (ret < 0) {
urts_log_error("Reading enclave token failed: %d\n", -ret);
goto out;
}
enclave->pal_sec.enclave_attributes = enclave_token.body.attributes;
#ifdef DEBUG
if (enclave->profile_enable) {
if (!(enclave->pal_sec.enclave_attributes.flags & SGX_FLAGS_DEBUG)) {
urts_log_error("Cannot use 'sgx.profile' with a production enclave\n");
ret = -EINVAL;
goto out;
}
ret = sgx_profile_init();
if (ret < 0)
goto out;
}
#endif
ret = read_enclave_sigstruct(enclave->sigfile, &enclave_sigstruct);
if (ret < 0) {
urts_log_error("Reading enclave sigstruct failed: %d\n", -ret);
goto out;
}
memset(&enclave_secs, 0, sizeof(enclave_secs));
enclave_secs.base = enclave->baseaddr;
enclave_secs.size = enclave->size;
ret = create_enclave(&enclave_secs, &enclave_token);
if (ret < 0) {
urts_log_error("Creating enclave failed: %d\n", -ret);
goto out;
}
/* SECS contains SSA frame size in pages, convert to size in bytes */
enclave->ssa_frame_size = enclave_secs.ssa_frame_size * g_page_size;
/* Start populating enclave memory */
struct mem_area {
const char* desc;
bool skip_eextend;
enum {
ELF_FD, // read from `fd` and parse as ELF
ZERO,
BUF,
TCS,
TLS
} data_src;
union {
int fd; // valid iff data_src == ELF_FD
struct { // valid iff data_src == BUF
const char* buf;
size_t buf_size;
};
};
unsigned long addr, size, prot;
enum sgx_page_type type;
};
/*
* 10 for manifest, SSA, TCS, etc
* + enclave->thread_num for normal stack
* + enclave->thread_num for signal stack
*/
int area_num_max = 10 + enclave->thread_num * 2;
struct mem_area* areas = __alloca(sizeof(areas[0]) * area_num_max);
int area_num = 0;
/* The manifest needs to be allocated at the upper end of the enclave
* memory. That's used by pal_linux_main to find the manifest area. So add
* it first to the list with memory areas. */
size_t manifest_size = strlen(manifest_to_measure) + 1;
areas[area_num] = (struct mem_area){.desc = "manifest",
.skip_eextend = false,
.data_src = BUF,
.buf = manifest_to_measure,
.buf_size = manifest_size,
.addr = 0,
.size = ALLOC_ALIGN_UP(manifest_size),
.prot = PROT_READ,
.type = SGX_PAGE_REG};
area_num++;
areas[area_num] =
(struct mem_area){.desc = "ssa",
.skip_eextend = false,
.data_src = ZERO,
.addr = 0,
.size = enclave->thread_num * enclave->ssa_frame_size *
SSA_FRAME_NUM,
.prot = PROT_READ | PROT_WRITE,
.type = SGX_PAGE_REG};
struct mem_area* ssa_area = &areas[area_num++];
areas[area_num] = (struct mem_area){.desc = "tcs",
.skip_eextend = false,
.data_src = TCS,
.addr = 0,
.size = enclave->thread_num * g_page_size,
.prot = PROT_READ | PROT_WRITE,
.type = SGX_PAGE_TCS};
struct mem_area* tcs_area = &areas[area_num++];
areas[area_num] = (struct mem_area){.desc = "tls",
.skip_eextend = false,
.data_src = TLS,
.addr = 0,
.size = enclave->thread_num * g_page_size,
.prot = PROT_READ | PROT_WRITE,
.type = SGX_PAGE_REG};
struct mem_area* tls_area = &areas[area_num++];
struct mem_area* stack_areas = &areas[area_num]; /* memorize for later use */
for (uint32_t t = 0; t < enclave->thread_num; t++) {
areas[area_num] = (struct mem_area){.desc = "stack",
.skip_eextend = false,
.data_src = ZERO,
.addr = 0,
.size = ENCLAVE_STACK_SIZE,
.prot = PROT_READ | PROT_WRITE,
.type = SGX_PAGE_REG};
area_num++;
}
struct mem_area* sig_stack_areas = &areas[area_num]; /* memorize for later use */
for (uint32_t t = 0; t < enclave->thread_num; t++) {
areas[area_num] = (struct mem_area){.desc = "sig_stack",
.skip_eextend = false,
.data_src = ZERO,
.addr = 0,
.size = ENCLAVE_SIG_STACK_SIZE,
.prot = PROT_READ | PROT_WRITE,
.type = SGX_PAGE_REG};
area_num++;
}
areas[area_num] = (struct mem_area){.desc = "pal",
.skip_eextend = false,
.data_src = ELF_FD,
.fd = enclave_image,
/* `addr` and `size` are set below */
.prot = 0,
.type = SGX_PAGE_REG};
struct mem_area* pal_area = &areas[area_num++];
ret = scan_enclave_binary(enclave_image, &pal_area->addr, &pal_area->size, &enclave_entry_addr);
if (ret < 0) {
urts_log_error("Scanning Pal binary (%s) failed: %d\n", enclave->libpal_uri, -ret);
goto out;
}
uintptr_t last_populated_addr = enclave->baseaddr + enclave->size;
for (int i = 0; i < area_num; i++) {
if (areas[i].addr)
continue;
areas[i].addr = last_populated_addr - areas[i].size;
last_populated_addr = areas[i].addr;
}
enclave_entry_addr += pal_area->addr;
if (last_populated_addr > enclave_heap_min) {
areas[area_num] = (struct mem_area){.desc = "free",
.skip_eextend = true,
.data_src = ZERO,
.addr = enclave_heap_min,
.size = last_populated_addr - enclave_heap_min,
.prot = PROT_READ | PROT_WRITE | PROT_EXEC,
.type = SGX_PAGE_REG};
area_num++;
}
for (int i = 0; i < area_num; i++) {
if (areas[i].data_src == ELF_FD) {
ret = load_enclave_binary(&enclave_secs, areas[i].fd, areas[i].addr, areas[i].prot);
if (ret < 0) {
urts_log_error("Loading enclave binary failed: %d\n", -ret);
goto out;
}
continue;
}
void* data = NULL;
if (areas[i].data_src != ZERO) {
data = (void*)INLINE_SYSCALL(mmap, 6, NULL, areas[i].size, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (IS_ERR_P(data) || data == NULL) {
/* Note that Graphene currently doesn't handle 0x0 addresses */
urts_log_error("Allocating memory failed\n");
goto out;
}
}
if (areas[i].data_src == TLS) {
for (uint32_t t = 0; t < enclave->thread_num; t++) {
struct enclave_tls* gs = data + g_page_size * t;
memset(gs, 0, g_page_size);
assert(sizeof(*gs) <= g_page_size);
gs->common.self = (PAL_TCB*)(tls_area->addr + g_page_size * t);
gs->common.stack_protector_canary = STACK_PROTECTOR_CANARY_DEFAULT;
gs->enclave_size = enclave->size;
gs->tcs_offset = tcs_area->addr - enclave->baseaddr + g_page_size * t;
gs->initial_stack_addr = stack_areas[t].addr + ENCLAVE_STACK_SIZE;
gs->sig_stack_low = sig_stack_areas[t].addr;
gs->sig_stack_high = sig_stack_areas[t].addr + ENCLAVE_SIG_STACK_SIZE;
gs->ssa = (void*)ssa_area->addr + enclave->ssa_frame_size * SSA_FRAME_NUM * t;
gs->gpr = gs->ssa + enclave->ssa_frame_size - sizeof(sgx_pal_gpr_t);
gs->manifest_size = manifest_size;
gs->heap_min = (void*)enclave_heap_min;
gs->heap_max = (void*)pal_area->addr;
gs->thread = NULL;
}
} else if (areas[i].data_src == TCS) {
for (uint32_t t = 0; t < enclave->thread_num; t++) {
sgx_arch_tcs_t* tcs = data + g_page_size * t;
memset(tcs, 0, g_page_size);
// .ossa, .oentry, .ofs_base and .ogs_base are offsets from enclave base, not VAs.
tcs->ossa = ssa_area->addr - enclave->baseaddr
+ enclave->ssa_frame_size * SSA_FRAME_NUM * t;
tcs->nssa = SSA_FRAME_NUM;
tcs->oentry = enclave_entry_addr - enclave->baseaddr;
tcs->ofs_base = 0;
tcs->ogs_base = tls_area->addr - enclave->baseaddr + t * g_page_size;
tcs->ofs_limit = 0xfff;
tcs->ogs_limit = 0xfff;
tcs_addrs[t] = (void*)tcs_area->addr + g_page_size * t;
}
} else if (areas[i].data_src == BUF) {
memcpy(data, areas[i].buf, areas[i].buf_size);
} else {
assert(areas[i].data_src == ZERO);
}
/* skip adding free (heap) pages to the enclave */
if (enclave->pal_sec.edmm_enable_heap && !strcmp(areas[i].desc, "free")) {
goto skip_add;
}
ret = add_pages_to_enclave(&enclave_secs, (void*)areas[i].addr, data, areas[i].size,
areas[i].type, areas[i].prot, areas[i].skip_eextend,
areas[i].desc);
skip_add:
if (data)
INLINE_SYSCALL(munmap, 2, data, areas[i].size);
if (ret < 0) {
urts_log_error("Adding pages (%s) to enclave failed: %d\n", areas[i].desc, -ret);
goto out;
}
}
ret = init_enclave(&enclave_secs, &enclave_sigstruct, &enclave_token);
if (ret < 0) {
urts_log_error("Initializing enclave failed: %d\n", -ret);
goto out;
}
create_tcs_mapper((void*)tcs_area->addr, enclave->thread_num);
struct enclave_dbginfo* dbg = (void*)INLINE_SYSCALL(
mmap, 6, DBGINFO_ADDR, sizeof(struct enclave_dbginfo), PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
if (IS_ERR_P(dbg)) {
urts_log_warning("Warning: Cannot allocate debug information (GDB will not work)\n");
} else {
dbg->pid = INLINE_SYSCALL(getpid, 0);
dbg->base = enclave->baseaddr;
dbg->size = enclave->size;
dbg->ssa_frame_size = enclave->ssa_frame_size;
dbg->aep = async_exit_pointer;
dbg->eresume = eresume_pointer;
dbg->thread_tids[0] = dbg->pid;
for (int i = 0; i < MAX_DBG_THREADS; i++)
dbg->tcs_addrs[i] = tcs_addrs[i];
}
if (g_sgx_enable_stats) {
/* set TCS.FLAGS.DBGOPTIN in all enclave threads to enable perf counters, Intel PT, etc */
enclave_mem = INLINE_SYSCALL(open, 3, "/proc/self/mem", O_RDWR | O_LARGEFILE, 0);
if (IS_ERR(enclave_mem)) {
urts_log_error("Setting TCS.FLAGS.DBGOPTIN failed: %d\n", -enclave_mem);
goto out;
}
for (size_t i = 0; i < enclave->thread_num; i++) {
uint64_t tcs_flags;
uint64_t* tcs_flags_ptr = tcs_addrs[i] + offsetof(sgx_arch_tcs_t, flags);
ret = INLINE_SYSCALL(pread, 4, enclave_mem, &tcs_flags, sizeof(tcs_flags),
(off_t)tcs_flags_ptr);
if (IS_ERR(ret)) {
urts_log_error("Reading TCS.FLAGS.DBGOPTIN failed: %d\n", -ret);
goto out;
}
tcs_flags |= TCS_FLAGS_DBGOPTIN;
ret = INLINE_SYSCALL(pwrite, 4, enclave_mem, &tcs_flags, sizeof(tcs_flags),
(off_t)tcs_flags_ptr);
if (IS_ERR(ret)) {
urts_log_error("Writing TCS.FLAGS.DBGOPTIN failed: %d\n", -ret);
goto out;
}
}
}
#ifdef DEBUG
/*
* Report libpal map. All subsequent files will be reported via DkDebugMapAdd(), but this
* one has to be handled separately.
*
* We report it here, before enclave start (as opposed to setup_pal_map()), because we want both
* GDB integration and profiling to be active from the very beginning of enclave execution.
*/
debug_map_add(enclave->libpal_uri + URI_PREFIX_FILE_LEN, (void*)pal_area->addr);
sgx_profile_report_elf(enclave->libpal_uri + URI_PREFIX_FILE_LEN, (void*)pal_area->addr);
#endif
ret = 0;
out:
if (enclave_image >= 0)
INLINE_SYSCALL(close, 1, enclave_image);
if (enclave_mem >= 0)
INLINE_SYSCALL(close, 1, enclave_mem);
return ret;
}
static void create_instance(struct pal_sec* pal_sec) {
PAL_NUM id = ((uint64_t)rdrand() << 32) | rdrand();
snprintf(pal_sec->pipe_prefix, sizeof(pal_sec->pipe_prefix), "/graphene/%016lx/", id);
pal_sec->instance_id = id;
}
/* Parses only the information needed by the untrusted PAL to correctly initialize the enclave. */
static int parse_loader_config(char* manifest, struct pal_enclave* enclave_info) {
int ret = 0;
toml_table_t* manifest_root = NULL;
char* sgx_ra_client_spid_str = NULL;
char errbuf[256];
manifest_root = toml_parse(manifest, errbuf, sizeof(errbuf));
if (!manifest_root) {
urts_log_error(
"PAL failed at parsing the manifest: %s\n"
" Graphene switched to the TOML format recently, please update the manifest\n"
" (in particular, string values must be put in double quotes)\n", errbuf);
ret = -EINVAL;
goto out;
}
// TODO: should actually be parsed by LibOS
char* entrypoint = NULL;
ret = toml_string_in(manifest_root, "libos.entrypoint", &entrypoint);
if (ret < 0) {
urts_log_error("Cannot parse 'libos.entrypoint'\n");
ret = -EINVAL;
goto out;
} else if (entrypoint == NULL) {
// Temporary hack for PAL regression tests. We should always error out here.
ret = toml_string_in(manifest_root, "pal.entrypoint", &entrypoint);
if (ret < 0) {
urts_log_error("Cannot parse 'pal.entrypoint'\n");
ret = -EINVAL;
goto out;
}
if (!entrypoint) {
urts_log_error("'libos.entrypoint' must be specified in the manifest\n");
ret = -EINVAL;
goto out;
}
}
enclave_info->entrypoint_uri = entrypoint;
ret = toml_sizestring_in(manifest_root, "sgx.enclave_size", /*defaultval=*/0,
&enclave_info->size);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.enclave_size' "
"(the value must be put in double quotes!)\n");
ret = -EINVAL;
goto out;
}
if (!enclave_info->size || !IS_POWER_OF_2(enclave_info->size)) {
urts_log_error("Enclave size not a power of two (an SGX-imposed requirement)\n");
ret = -EINVAL;
goto out;
}
int64_t thread_num_int64;
ret = toml_int_in(manifest_root, "sgx.thread_num", /*defaultval=*/0, &thread_num_int64);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.thread_num'\n");
ret = -EINVAL;
goto out;
}
if (thread_num_int64 < 0) {
urts_log_error("Negative 'sgx.thread_num' is impossible\n");
ret = -EINVAL;
goto out;
}
enclave_info->thread_num = thread_num_int64;
if (!enclave_info->thread_num) {
urts_log_warning("Warning: Number of enclave threads ('sgx.thread_num') is not specified; "
"assumed to be 1\n");
enclave_info->thread_num = 1;
}
if (enclave_info->thread_num > MAX_DBG_THREADS) {
urts_log_error("Too large 'sgx.thread_num', maximum allowed is %d\n", MAX_DBG_THREADS);
ret = -EINVAL;
goto out;
}
int64_t rpc_thread_num_int64;
ret = toml_int_in(manifest_root, "sgx.rpc_thread_num", /*defaultval=*/0, &rpc_thread_num_int64);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.rpc_thread_num'\n");
ret = -EINVAL;
goto out;
}
if (rpc_thread_num_int64 < 0) {
urts_log_error("Negative 'sgx.rpc_thread_num' is impossible\n");
ret = -EINVAL;
goto out;
}
enclave_info->rpc_thread_num = rpc_thread_num_int64;
if (enclave_info->rpc_thread_num > MAX_RPC_THREADS) {
urts_log_error("Too large 'sgx.rpc_thread_num', maximum allowed is %d\n",
MAX_RPC_THREADS);
ret = -EINVAL;
goto out;
}
if (enclave_info->rpc_thread_num && enclave_info->thread_num > RPC_QUEUE_SIZE) {
urts_log_error("Too many threads for exitless feature (more than capacity of RPC queue)\n");
ret = -EINVAL;
goto out;
}
int64_t nonpie_binary;
ret = toml_int_in(manifest_root, "sgx.nonpie_binary", /*defaultval=*/0, &nonpie_binary);
if (ret < 0 || (nonpie_binary != 0 && nonpie_binary != 1)) {
urts_log_error("Cannot parse 'sgx.nonpie_binary' (the value must be 0 or 1)\n");
ret = -EINVAL;
goto out;
}
enclave_info->nonpie_binary = !!nonpie_binary;
int64_t enable_stats_int64;
ret = toml_int_in(manifest_root, "sgx.enable_stats", /*defaultval=*/0, &enable_stats_int64);
if (ret < 0 || (enable_stats_int64 != 0 && enable_stats_int64 != 1)) {
urts_log_error("Cannot parse 'sgx.enable_stats' (the value must be 0 or 1)\n");
ret = -EINVAL;
goto out;
}
g_sgx_enable_stats = !!enable_stats_int64;
char* dummy_sigfile_str = NULL;
ret = toml_string_in(manifest_root, "sgx.sigfile", &dummy_sigfile_str);
if (ret < 0 || dummy_sigfile_str) {
urts_log_error("sgx.sigfile is not supported anymore. Please update your manifest "
"according to the current documentation.\n");
ret = -EINVAL;
goto out;
}
free(dummy_sigfile_str);
int64_t sgx_remote_attestation_int;
ret = toml_int_in(manifest_root, "sgx.remote_attestation", /*defaultval=*/0,
&sgx_remote_attestation_int);
if (ret < 0 || (sgx_remote_attestation_int != 0 && sgx_remote_attestation_int != 1)) {
urts_log_error("Cannot parse 'sgx.remote_attestation' (the value must be 0 or 1)\n");
ret = -EINVAL;
goto out;
}
enclave_info->remote_attestation_enabled = !!sgx_remote_attestation_int;
ret = toml_string_in(manifest_root, "sgx.ra_client_spid", &sgx_ra_client_spid_str);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.ra_client_spid' "
"(the value must be put in double quotes!)\n");
ret = -EINVAL;
goto out;
}
int64_t sgx_ra_client_linkable_int;
ret = toml_int_in(manifest_root, "sgx.ra_client_linkable", /*defaultval=*/-1,
&sgx_ra_client_linkable_int);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.ra_client_linkable'\n");
ret = -EINVAL;
goto out;
}
if (!enclave_info->remote_attestation_enabled &&
(sgx_ra_client_spid_str || sgx_ra_client_linkable_int >= 0)) {
urts_log_error(
"Detected EPID remote attestation parameters 'ra_client_spid' and/or "
"'ra_client_linkable' in the manifest but no 'remote_attestation' parameter. "
"Please add 'sgx.remote_attestation = 1' to the manifest.\n");
ret = -EINVAL;
goto out;
}
/* EPID is used if SPID is a non-empty string in manifest, otherwise DCAP/ECDSA */
enclave_info->use_epid_attestation = sgx_ra_client_spid_str && strlen(sgx_ra_client_spid_str);
int64_t edmm_enable_heap;
ret = toml_int_in(manifest_root, "sgx.edmm_enable_heap", /*defaultval=*/0, &edmm_enable_heap);
if (ret < 0 || (edmm_enable_heap != 0 && edmm_enable_heap != 1)) {
urts_log_error("Cannot parse 'sgx.edmm_enable_heap' (the value must be 0 or 1)\n");
ret = -EINVAL;
goto out;
}
enclave_info->pal_sec.edmm_enable_heap = !!edmm_enable_heap;
char* profile_str = NULL;
ret = toml_string_in(manifest_root, "sgx.profile.enable", &profile_str);
if (ret < 0) {
urts_log_error("Cannot parse 'sgx.profile.enable' "
"(the value must be \"none\", \"main\" or \"all\")\n");
ret = -EINVAL;
goto out;
}
#ifdef DEBUG
enclave_info->profile_enable = false;
enclave_info->profile_filename[0] = '\0';
if (!profile_str || !strcmp(profile_str, "none")) {
// do not enable
} else if (!strcmp(profile_str, "main")) {
if (enclave_info->is_first_process) {
snprintf(enclave_info->profile_filename, ARRAY_SIZE(enclave_info->profile_filename),
SGX_PROFILE_FILENAME);
enclave_info->profile_enable = true;
}
} else if (!strcmp(profile_str, "all")) {
enclave_info->profile_enable = true;
snprintf(enclave_info->profile_filename, ARRAY_SIZE(enclave_info->profile_filename),
SGX_PROFILE_FILENAME_WITH_PID, (int)INLINE_SYSCALL(getpid, 0));
} else {
urts_log_error("Invalid 'sgx.profile.enable' "
"(the value must be \"none\", \"main\" or \"all\")\n");
ret = -EINVAL;
goto out;
}
int64_t profile_with_stack;
ret = toml_int_in(manifest_root, "sgx.profile.with_stack", /*defaultval=*/0,
&profile_with_stack);
if (ret < 0 || (profile_with_stack != 0 && profile_with_stack != 1)) {
urts_log_error("Cannot parse 'sgx.profile.with_stack' (the value must be 0 or 1)\n");
ret = -EINVAL;
goto out;
}
enclave_info->profile_with_stack = profile_with_stack;
int64_t profile_frequency;
ret = toml_int_in(manifest_root, "sgx.profile.frequency", SGX_PROFILE_DEFAULT_FREQUENCY,
&profile_frequency);
if (ret < 0 || !(0 < profile_frequency && profile_frequency <= SGX_PROFILE_MAX_FREQUENCY)) {
urts_log_error("Cannot parse 'sgx.profile.frequency' "
"(the value must be between 1 and %d)\n", SGX_PROFILE_MAX_FREQUENCY);
ret = -EINVAL;
goto out;
}
enclave_info->profile_frequency = profile_frequency;
#else
if (profile_str && strcmp(profile_str, "none")) {
urts_log_error("Invalid 'sgx.profile.enable' "
"(SGX profiling works only when Graphene is compiled with DEBUG=1)\n");
ret = -EINVAL;
goto out;
}
#endif
int log_level = PAL_LOG_DEFAULT_LEVEL;
char* log_level_str = NULL;
ret = toml_string_in(manifest_root, "loader.log_level", &log_level_str);
if (ret < 0) {
urts_log_error("Cannot parse 'loader.log_level'\n");
ret = -EINVAL;
goto out;
}
if (log_level_str) {
if (!strcmp(log_level_str, "none")) {
log_level = PAL_LOG_NONE;
} else if (!strcmp(log_level_str, "error")) {
log_level = PAL_LOG_ERROR;
} else if (!strcmp(log_level_str, "warning")) {
log_level = PAL_LOG_WARNING;
} else if (!strcmp(log_level_str, "debug")) {
log_level = PAL_LOG_DEBUG;
} else if (!strcmp(log_level_str, "trace")) {
log_level = PAL_LOG_TRACE;
} else if (!strcmp(log_level_str, "all")) {
log_level = PAL_LOG_ALL;
} else {
urts_log_error("Unknown 'loader.log_level'\n");
ret = -EINVAL;
goto out;
}
}
free(log_level_str);
char* log_file = NULL;
ret = toml_string_in(manifest_root, "loader.log_file", &log_file);
if (ret < 0) {
urts_log_error("Cannot parse 'loader.log_file'\n");
ret = -EINVAL;
goto out;
}
if (log_level > PAL_LOG_NONE && log_file) {
ret = urts_log_init(log_file);
if (ret < 0) {
urts_log_error("Cannot open log file: %d\n", ret);
goto out;
}
}
free(log_file);
g_urts_log_level = log_level;
ret = 0;
out:
free(sgx_ra_client_spid_str);
toml_free(manifest_root);
return ret;
}
/* Warning: This function does not free up resources on failure - it assumes that the whole process
* exits after this function's failure. */
static int load_enclave(struct pal_enclave* enclave, const char* exec_path, char* args,
size_t args_size, char* env, size_t env_size, bool need_gsgx) {
int ret;
struct timeval tv;
struct pal_sec* pal_sec = &enclave->pal_sec;
uint64_t start_time;
INLINE_SYSCALL(gettimeofday, 2, &tv, NULL);
start_time = tv.tv_sec * 1000000UL + tv.tv_usec;
ret = parse_loader_config(enclave->raw_manifest_data, enclave);
if (ret < 0) {
urts_log_error("Parsing manifest failed\n");
return -EINVAL;
}
if (!exec_path)
exec_path = enclave->entrypoint_uri + URI_PREFIX_FILE_LEN;
size_t exec_path_len = strlen(exec_path);
ret = open_sgx_driver(need_gsgx);
if (ret < 0)
return ret;
if (!is_wrfsbase_supported())
return -EPERM;
pal_sec->pid = INLINE_SYSCALL(getpid, 0);
pal_sec->uid = INLINE_SYSCALL(getuid, 0);
pal_sec->gid = INLINE_SYSCALL(getgid, 0);
/* we cannot use CPUID(0xb) because it counts even disabled-by-BIOS cores (e.g. HT cores);
* instead extract info on total number of logical cores, number of physical cores,
* SMT support etc. by parsing sysfs pseudo-files */
int online_logical_cores = get_hw_resource("/sys/devices/system/cpu/online", /*count=*/true);
if (online_logical_cores < 0)
return online_logical_cores;
pal_sec->online_logical_cores = online_logical_cores;
int possible_logical_cores = get_hw_resource("/sys/devices/system/cpu/possible",
/*count=*/true);
if (possible_logical_cores < 0)
return possible_logical_cores;
pal_sec->possible_logical_cores = possible_logical_cores;
/* TODO: correctly support offline cores */
if (possible_logical_cores > 0 && possible_logical_cores > online_logical_cores) {
printf("Warning: some CPUs seem to be offline; Graphene doesn't take this into account "
"which may lead to subpar performance\n");
}
int core_siblings = get_hw_resource("/sys/devices/system/cpu/cpu0/topology/core_siblings_list",
/*count=*/true);
if (core_siblings < 0)
return core_siblings;
int smt_siblings = get_hw_resource("/sys/devices/system/cpu/cpu0/topology/thread_siblings_list",
/*count=*/true);
if (smt_siblings < 0)
return smt_siblings;
pal_sec->physical_cores_per_socket = core_siblings / smt_siblings;
/* array of "logical core -> socket" mappings */
int* cpu_socket = (int*)malloc(online_logical_cores * sizeof(int));
if (!cpu_socket)
return -ENOMEM;
char filename[128];
for (int idx = 0; idx < online_logical_cores; idx++) {
snprintf(filename, sizeof(filename),
"/sys/devices/system/cpu/cpu%d/topology/physical_package_id", idx);
cpu_socket[idx] = get_hw_resource(filename, /*count=*/false);
if (cpu_socket[idx] < 0) {
urts_log_error("Cannot read %s\n", filename);
ret = cpu_socket[idx];
free(cpu_socket);
return ret;
}
}
pal_sec->cpu_socket = cpu_socket;
ret = get_topology_info(&pal_sec->topo_info);
if (ret < 0)
return ret;
#ifdef DEBUG
size_t env_i = 0;
while (env_i < env_size) {
if (!strcmp(&env[env_i], "IN_GDB=1")) {
urts_log_warning("[ Running under GDB ]\n");
pal_sec->in_gdb = true;
}
env_i += strnlen(&env[env_i], env_size - env_i) + 1;
}
#endif
enclave->libpal_uri = alloc_concat(URI_PREFIX_FILE, URI_PREFIX_FILE_LEN, g_libpal_path, -1);
if (!enclave->libpal_uri) {
urts_log_error("Out of memory for enclave->libpal_uri\n");
return -ENOMEM;
}
if (enclave->libpal_uri[URI_PREFIX_FILE_LEN] != '/') {
urts_log_error("Path to in-enclave PAL (%s) must be absolute\n", enclave->libpal_uri);
return -EINVAL;
}
char* sig_path = alloc_concat(g_pal_enclave.application_path, -1, ".sig", -1);
if (!sig_path) {
return -ENOMEM;
}
enclave->sigfile = INLINE_SYSCALL(open, 3, sig_path, O_RDONLY | O_CLOEXEC, 0);
if (IS_ERR(enclave->sigfile)) {
urts_log_error("Cannot open sigstruct file %s\n", sig_path);
return -EINVAL;
}
free(sig_path);
char* token_path = alloc_concat(g_pal_enclave.application_path, -1, ".token", -1);
if (!token_path) {
return -ENOMEM;
}
enclave->token = INLINE_SYSCALL(open, 3, token_path, O_RDONLY | O_CLOEXEC, 0);
if (IS_ERR(enclave->token)) {
urts_log_error(
"Cannot open token %s. Use pal-sgx-get-token on the runtime host or run "
"`make SGX=1 sgx-tokens` in the Graphene source to create the token file.\n",
token_path);
return -EINVAL;