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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2019, Linaro Limited
*/
#include <assert.h>
#include <ldelf.h>
#include <malloc.h>
#include <printk.h>
#include <string.h>
#include <sys/queue.h>
#include <tee_api_types.h>
#include <trace.h>
#include <types_ext.h>
#include <util.h>
#include "dl.h"
#include "ftrace.h"
#include "sys.h"
#include "ta_elf.h"
static size_t mpool_size = 3 * SMALL_PAGE_SIZE;
static vaddr_t mpool_base;
static void __printf(2, 0) print_to_console(void *pctx __unused,
const char *fmt, va_list ap)
{
trace_vprintf(NULL, 0, TRACE_ERROR, true, fmt, ap);
}
static void __noreturn __maybe_unused dump_ta_state(struct dump_entry_arg *arg)
{
struct ta_elf *elf = TAILQ_FIRST(&main_elf_queue);
assert(elf && elf->is_main);
EMSG_RAW("Status of TA %pUl", (void *)&elf->uuid);
EMSG_RAW(" arch: %s", elf->is_32bit ? "arm" : "aarch64");
ta_elf_print_mappings(NULL, print_to_console, &main_elf_queue,
arg->num_maps, arg->maps, mpool_base);
if (arg->is_arm32)
ta_elf_stack_trace_a32(arg->arm32.regs);
else
ta_elf_stack_trace_a64(arg->arm64.fp, arg->arm64.sp,
arg->arm64.pc);
sys_return_cleanup();
}
#ifdef CFG_FTRACE_SUPPORT
struct print_buf_ctx {
char *buf;
size_t blen;
size_t ret;
};
static void __printf(2, 0) print_to_pbuf(void *pctx, const char *fmt,
va_list ap)
{
struct print_buf_ctx *pbuf = pctx;
char *buf = NULL;
size_t blen = 0;
int ret = 0;
if (pbuf->buf && pbuf->blen > pbuf->ret) {
buf = pbuf->buf + pbuf->ret;
blen = pbuf->blen - pbuf->ret;
}
ret = vsnprintk(buf, blen, fmt, ap);
assert(ret >= 0);
pbuf->ret += ret;
}
static void copy_to_pbuf(void *pctx, void *b, size_t bl)
{
struct print_buf_ctx *pbuf = pctx;
char *buf = NULL;
size_t blen = 0;
if (pbuf->buf && pbuf->blen > pbuf->ret) {
buf = pbuf->buf + pbuf->ret;
blen = pbuf->blen - pbuf->ret;
memcpy(buf, b, MIN(blen, bl));
}
pbuf->ret += bl;
}
static void __noreturn ftrace_dump(void *buf, size_t *blen)
{
struct print_buf_ctx pbuf = { .buf = buf, .blen = *blen };
ta_elf_print_mappings(&pbuf, print_to_pbuf, &main_elf_queue,
0, NULL, mpool_base);
ftrace_copy_buf(&pbuf, copy_to_pbuf);
*blen = pbuf.ret;
sys_return_cleanup();
}
#endif
static void __noreturn dl_entry(struct dl_entry_arg *arg)
{
switch (arg->cmd) {
case LDELF_DL_ENTRY_DLOPEN:
arg->ret = dlopen_entry(arg);
break;
case LDELF_DL_ENTRY_DLSYM:
arg->ret = dlsym_entry(arg);
break;
default:
arg->ret = TEE_ERROR_NOT_SUPPORTED;
}
sys_return_cleanup();
}
/*
* ldelf()- Loads ELF into memory
* @arg: Argument passing to/from TEE Core
*
* Only called from assembly
*/
void __noreturn ldelf(struct ldelf_arg *arg);
void ldelf(struct ldelf_arg *arg)
{
TEE_Result res = TEE_SUCCESS;
struct ta_elf *elf = NULL;
DMSG("Loading TA %pUl", (void *)&arg->uuid);
res = sys_map_zi(mpool_size, 0, &mpool_base, 0, 0);
if (res) {
EMSG("sys_map_zi(%zu): result %"PRIx32, mpool_size, res);
panic();
}
malloc_add_pool((void *)mpool_base, mpool_size);
/* Load the main binary and get a list of dependencies, if any. */
ta_elf_load_main(&arg->uuid, &arg->is_32bit, &arg->stack_ptr,
&arg->flags);
/*
* Load binaries, ta_elf_load() may add external libraries to the
* list, so the loop will end when all the dependencies are
* satisfied.
*/
TAILQ_FOREACH(elf, &main_elf_queue, link)
ta_elf_load_dependency(elf, arg->is_32bit);
TAILQ_FOREACH(elf, &main_elf_queue, link) {
ta_elf_relocate(elf);
ta_elf_finalize_mappings(elf);
}
ta_elf_finalize_load_main(&arg->entry_func);
arg->ftrace_entry = 0;
#ifdef CFG_FTRACE_SUPPORT
if (ftrace_init(&arg->fbuf))
arg->ftrace_entry = (vaddr_t)(void *)ftrace_dump;
#endif
TAILQ_FOREACH(elf, &main_elf_queue, link)
DMSG("ELF (%pUl) at %#"PRIxVA,
(void *)&elf->uuid, elf->load_addr);
#if TRACE_LEVEL >= TRACE_ERROR
arg->dump_entry = (vaddr_t)(void *)dump_ta_state;
#else
arg->dump_entry = 0;
#endif
arg->dl_entry = (vaddr_t)(void *)dl_entry;
sys_return_cleanup();
}
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