Merge tag 'bsd-user-for-9.1-pull-request' of gitlab.com:bsdimp/qemu into staging

bsd-user: Misc changes for 9.1 (I hope)

V2: Add missing bsd-user/aarch64/target.h

This patch series includes two main sets of patches. To make it simple to
review, I've included the changes from my student which the later changes depend
on. I've included a change from Jessica and Doug as well. I've reviewed them,
but more eyes never hurt.

I've also included a number of 'touch up' patches needed either to get the
aarch64 building, or to implmement suggestions from prior review cycles. The
main one is what's charitably described as a kludge: force aarch64 to use 4k
pages. The qemu-project (and blitz branch) hasn't had the necessary changes to
bsd-user needed to support variable page size.

Sorry this is so late... Live has conspired to delay me.

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# gpg: Good signature from "Warner Losh <wlosh@netflix.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@bsdimp.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@freebsd.org>" [unknown]
# gpg:                 aka "Warner Losh <imp@village.org>" [unknown]
# gpg:                 aka "Warner Losh <wlosh@bsdimp.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2035 F894 B00A A3CF 7CCD  E1B7 6C1C D128 7DB0 1100

* tag 'bsd-user-for-9.1-pull-request' of gitlab.com:bsdimp/qemu:
  bsd-user: Add target.h for aarch64.
  bsd-user: Add aarch64 build to tree
  bsd-user: Make compile for non-linux user-mode stuff
  bsd-user: Define TARGET_SIGSTACK_ALIGN and use it to round stack
  bsd-user: Sync fork_start/fork_end with linux-user
  bsd-user: Hard wire aarch64 to be 4k pages only
  bsd-user: Simplify the implementation of execve
  bsd-user:Add AArch64 improvements and signal handling functions
  bsd-user:Add set_mcontext function for ARM AArch64
  bsd-user:Add setup_sigframe_arch function for ARM AArch64
  bsd-user:Add get_mcontext function for ARM AArch64
  bsd-user:Add ARM AArch64 signal handling support
  bsd-user:Add ARM AArch64 support and capabilities
  bsd-user:Add AArch64 register handling and related functions
  bsd-user:Add CPU initialization and management functions

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 3 insertions, 115 deletions

diff --git a/bsd-user/freebsd/os-proc.c b/bsd-user/freebsd/os-proc.c
index e0203e259b..bf993f1b66 100644
--- a/bsd-user/freebsd/os-proc.c
+++ b/bsd-user/freebsd/os-proc.c
@@ -27,64 +27,12 @@ struct kinfo_proc;
 #include "qemu.h"
 
 /*
- * Get the filename for the given file descriptor.
- * Note that this may return NULL (fail) if no longer cached in the kernel.
- */
-static char *
-get_filename_from_fd(pid_t pid, int fd, char *filename, size_t len)
-{
-    char *ret = NULL;
-    unsigned int cnt;
-    struct procstat *procstat = NULL;
-    struct kinfo_proc *kp = NULL;
-    struct filestat_list *head = NULL;
-    struct filestat *fst;
-
-    procstat = procstat_open_sysctl();
-    if (procstat == NULL) {
-        goto out;
-    }
-
-    kp = procstat_getprocs(procstat, KERN_PROC_PID, pid, &cnt);
-    if (kp == NULL) {
-        goto out;
-    }
-
-    head = procstat_getfiles(procstat, kp, 0);
-    if (head == NULL) {
-        goto out;
-    }
-
-    STAILQ_FOREACH(fst, head, next) {
-        if (fd == fst->fs_fd) {
-            if (fst->fs_path != NULL) {
-                (void)strlcpy(filename, fst->fs_path, len);
-                ret = filename;
-            }
-            break;
-        }
-    }
-
-out:
-    if (head != NULL) {
-        procstat_freefiles(procstat, head);
-    }
-    if (kp != NULL) {
-        procstat_freeprocs(procstat, kp);
-    }
-    if (procstat != NULL) {
-        procstat_close(procstat);
-    }
-    return ret;
-}
-
-/*
  * execve/fexecve
  */
 abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
         abi_ulong guest_envp, int do_fexec)
 {
-    char **argp, **envp, **qargp, **qarg1, **qarg0, **qargend;
+    char **argp, **envp, **qarg0;
     int argc, envc;
     abi_ulong gp;
     abi_ulong addr;
@@ -117,9 +65,7 @@ abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
     qarg0 = argp = g_new0(char *, argc + 9);
     /* save the first argument for the emulator */
     *argp++ = (char *)getprogname();
-    qargp = argp;
     *argp++ = (char *)getprogname();
-    qarg1 = argp;
     envp = g_new0(char *, envc + 1);
     for (gp = guest_argp, q = argp; gp; gp += sizeof(abi_ulong), q++) {
         if (get_user_ual(addr, gp)) {
@@ -137,7 +83,6 @@ abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
         total_size += strlen(*q) + 1;
     }
     *q++ = NULL;
-    qargend = q;
 
     for (gp = guest_envp, q = envp; gp; gp += sizeof(abi_ulong), q++) {
         if (get_user_ual(addr, gp)) {
@@ -166,71 +111,14 @@ abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
     }
 
     if (do_fexec) {
-        if (((int)path_or_fd > 0 &&
-            is_target_elf_binary((int)path_or_fd)) == 1) {
-            char execpath[PATH_MAX];
-
-            /*
-             * The executable is an elf binary for the target
-             * arch.  execve() it using the emulator if we can
-             * determine the filename path from the fd.
-             */
-            if (get_filename_from_fd(getpid(), (int)path_or_fd, execpath,
-                        sizeof(execpath)) != NULL) {
-                memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
-                qarg1[1] = qarg1[0];
-                qarg1[0] = (char *)"-0";
-                qarg1 += 2;
-                qargend += 2;
-                *qarg1 = execpath;
-#ifndef DONT_INHERIT_INTERP_PREFIX
-                memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
-                *qarg1++ = (char *)"-L";
-                *qarg1++ = (char *)interp_prefix;
-#endif
-                ret = get_errno(execve(qemu_proc_pathname, qargp, envp));
-            } else {
-                /* Getting the filename path failed. */
-                ret = -TARGET_EBADF;
-                goto execve_end;
-            }
-        } else {
-            ret = get_errno(fexecve((int)path_or_fd, argp, envp));
-        }
+        ret = get_errno(fexecve((int)path_or_fd, argp, envp));
     } else {
-        int fd;
-
         p = lock_user_string(path_or_fd);
         if (p == NULL) {
             ret = -TARGET_EFAULT;
             goto execve_end;
         }
-
-        /*
-         * Check the header and see if it a target elf binary.  If so
-         * then execute using qemu user mode emulator.
-         */
-        fd = open(p, O_RDONLY | O_CLOEXEC);
-        if (fd > 0 && is_target_elf_binary(fd) == 1) {
-            close(fd);
-            /* execve() as a target binary using emulator. */
-            memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
-            qarg1[1] = qarg1[0];
-            qarg1[0] = (char *)"-0";
-            qarg1 += 2;
-            qargend += 2;
-            *qarg1 = (char *)p;
-#ifndef DONT_INHERIT_INTERP_PREFIX
-            memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
-            *qarg1++ = (char *)"-L";
-            *qarg1++ = (char *)interp_prefix;
-#endif
-            ret = get_errno(execve(qemu_proc_pathname, qargp, envp));
-        } else {
-            close(fd);
-            /* Execve() as a host native binary. */
-            ret = get_errno(execve(p, argp, envp));
-        }
+        ret = get_errno(execve(p, argp, envp));
         unlock_user(p, path_or_fd, 0);
     }