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bsd-user: save the path to the qemu emulator

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Save the path to the qemu emulator. This will be used later when we have
a more complete implementation of exec.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
This commit is contained in:
Warner Losh 2021-08-03 13:39:31 -06:00
parent d1dc9ab3af
commit 01a298a57e
2 changed files with 22 additions and 0 deletions
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21
bsd-user/main.c
View file

@ -43,6 +43,8 @@
#include "host-os.h"
#include <sys/sysctl.h>
int singlestep;
unsigned long mmap_min_addr;
uintptr_t guest_base;
@ -52,6 +54,7 @@ unsigned long reserved_va;
static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
const char *qemu_uname_release;
enum BSDType bsd_type;
char qemu_proc_pathname[PATH_MAX]; /* full path to exeutable */
/*
* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
@ -336,6 +339,22 @@ void init_task_state(TaskState *ts)
ts->sigqueue_table[i].next = NULL;
}
static void save_proc_pathname(char *argv0)
{
int mib[4];
size_t len;
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PATHNAME;
mib[3] = -1;
len = sizeof(qemu_proc_pathname);
if (sysctl(mib, 4, qemu_proc_pathname, &len, NULL, 0)) {
perror("sysctl");
}
}
int main(int argc, char **argv)
{
const char *filename;
@ -360,6 +379,8 @@ int main(int argc, char **argv)
usage();
}
save_proc_pathname(argv[0]);
error_init(argv[0]);
module_call_init(MODULE_INIT_TRACE);
qemu_init_cpu_list();

1
bsd-user/qemu.h
View file

@ -207,6 +207,7 @@ void mmap_fork_start(void);
void mmap_fork_end(int child);
/* main.c */
extern char qemu_proc_pathname[];
extern unsigned long x86_stack_size;
/* user access */