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bsd-user: Implement --seed and initialize random state

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Copy --seed implementation (translated from linux-user's newer command
line scheme to the older one bsd-user still uses). Initialize the
randomness with the glib if a specific seed is specified or use the
qcrypto library if not.

Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2021-09-02 16:52:45 -06:00 • committed by Warner Losh
parent 790baacc63
commit 03ecf078fa
1 changed files with 18 additions and 0 deletions
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18
bsd-user/main.c
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@ -45,6 +45,8 @@
#include "qemu/cutils.h" #include "qemu/cutils.h"
#include "exec/log.h" #include "exec/log.h"
#include "trace/control.h" #include "trace/control.h"
#include "crypto/init.h"
#include "qemu/guest-random.h"
#include "host-os.h" #include "host-os.h"
#include "target_arch_cpu.h" #include "target_arch_cpu.h"
@ -203,6 +205,7 @@ int main(int argc, char **argv)
const char *cpu_type; const char *cpu_type;
const char *log_file = NULL; const char *log_file = NULL;
const char *log_mask = NULL; const char *log_mask = NULL;
const char *seed_optarg = NULL;
struct target_pt_regs regs1, *regs = &regs1; struct target_pt_regs regs1, *regs = &regs1;
struct image_info info1, *info = &info1; struct image_info info1, *info = &info1;
struct bsd_binprm bprm; struct bsd_binprm bprm;
@ -331,6 +334,8 @@ int main(int argc, char **argv)
usage(); usage();
} }
optind++; optind++;
} else if (!strcmp(r, "seed")) {
seed_optarg = optarg;
} else if (!strcmp(r, "singlestep")) { } else if (!strcmp(r, "singlestep")) {
singlestep = 1; singlestep = 1;
} else if (!strcmp(r, "strace")) { } else if (!strcmp(r, "strace")) {
@ -403,6 +408,19 @@ int main(int argc, char **argv)
target_environ = envlist_to_environ(envlist, NULL); target_environ = envlist_to_environ(envlist, NULL);
envlist_free(envlist); envlist_free(envlist);
{
Error *err = NULL;
if (seed_optarg != NULL) {
qemu_guest_random_seed_main(seed_optarg, &err);
} else {
qcrypto_init(&err);
}
if (err) {
error_reportf_err(err, "cannot initialize crypto: ");
exit(1);
}
}
/* /*
* Now that page sizes are configured we can do * Now that page sizes are configured we can do
* proper page alignment for guest_base. * proper page alignment for guest_base.