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linux-user pull for 2.2

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Two minor fixes and new a feature, addition of QEMU_RAND_SEED for
 testing needs.
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Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20141101' into staging

linux-user pull for 2.2

Two minor fixes and new a feature, addition of QEMU_RAND_SEED for
testing needs.

# gpg: Signature made Mon 03 Nov 2014 11:49:39 GMT using RSA key ID DE3C9BC0
# gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>"
# gpg:                 aka "Riku Voipio <riku.voipio@linaro.org>"

* remotes/riku/tags/pull-linux-user-20141101:
  elf: take phdr offset into account when calculating the program load address
  linux-user: Fix fault address truncation AArch64
  linux-user: Let user specify random seed

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-11-03 20:23:15 +00:00
commit 47e8acb45f
2 changed files with 21 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
linux-user/elfload.c
View File

@ -1539,7 +1539,6 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
* Generate 16 random bytes for userspace PRNG seeding (not
* cryptically secure but it's not the aim of QEMU).
*/
srand((unsigned int) time(NULL));
for (i = 0; i < 16; i++) {
k_rand_bytes[i] = rand();
}
@ -1821,7 +1820,7 @@ static void load_elf_image(const char *image_name, int image_fd,
loaddr = -1, hiaddr = 0;
for (i = 0; i < ehdr->e_phnum; ++i) {
if (phdr[i].p_type == PT_LOAD) {
abi_ulong a = phdr[i].p_vaddr;
abi_ulong a = phdr[i].p_vaddr - phdr[i].p_offset;
if (a < loaddr) {
loaddr = a;
}

23
linux-user/main.c
View File

@ -1006,7 +1006,6 @@ void cpu_loop(CPUARMState *env)
CPUState *cs = CPU(arm_env_get_cpu(env));
int trapnr, sig;
target_siginfo_t info;
uint32_t addr;
for (;;) {
cpu_exec_start(cs);
@ -1042,12 +1041,11 @@ void cpu_loop(CPUARMState *env)
/* fall through for segv */
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
addr = env->exception.vaddress;
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = addr;
info._sifields._sigfault._addr = env->exception.vaddress;
queue_signal(env, info.si_signo, &info);
break;
case EXCP_DEBUG:
@ -3546,6 +3544,17 @@ static void handle_arg_pagesize(const char *arg)
}
}
static void handle_arg_randseed(const char *arg)
{
unsigned long long seed;
if (parse_uint_full(arg, &seed, 0) != 0 || seed > UINT_MAX) {
fprintf(stderr, "Invalid seed number: %s\n", arg);
exit(1);
}
srand(seed);
}
static void handle_arg_gdb(const char *arg)
{
gdbstub_port = atoi(arg);
@ -3674,6 +3683,8 @@ static const struct qemu_argument arg_table[] = {
"", "run in singlestep mode"},
{"strace", "QEMU_STRACE", false, handle_arg_strace,
"", "log system calls"},
{"seed", "QEMU_RAND_SEED", true, handle_arg_randseed,
"", "Seed for pseudo-random number generator"},
{"version", "QEMU_VERSION", false, handle_arg_version,
"", "display version information and exit"},
{NULL, NULL, false, NULL, NULL, NULL}
@ -3856,6 +3867,8 @@ int main(int argc, char **argv, char **envp)
cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
#endif
srand(time(NULL));
optind = parse_args(argc, argv);
/* Zero out regs */
@ -3926,6 +3939,10 @@ int main(int argc, char **argv, char **envp)
do_strace = 1;
}
if (getenv("QEMU_RAND_SEED")) {
handle_arg_randseed(getenv("QEMU_RAND_SEED"));
}
target_environ = envlist_to_environ(envlist, NULL);
envlist_free(envlist);