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Pull request 

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Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-6.0-pull-request' into staging

Pull request

# gpg: Signature made Mon 15 Feb 2021 12:51:38 GMT
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-6.0-pull-request:
  linux-user/mips: Support the n32 ABI for the R5900
  docs/user: Remove outdated 'Quick Start' section
  linux-user: target: signal: Support TARGET_SS_AUTODISARM
  linux-user: add TARGET_SO_{DOMAIN,PROTOCOL}
  linux-user/syscall: Fix do_ioctl_ifconf() for 64 bit targets.
  linux-user/mmap: Avoid asserts for out of range mremap calls
  linux-user: Fix loading of BSS segments
  linux-user: fix O_NONBLOCK in signalfd4() and eventfd2() syscalls
  linux-user: fix O_NONBLOCK usage for hppa target
  linux-user: Add missing TARGET___O_TMPFILE for hppa and alpha
  linux-user/signal: Decode waitid si_code
  linux-user/mips64: Support o32 ABI syscalls
  linux-user/mips64: Restore setup_frame() for o32 ABI

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2021-02-15 13:04:33 +00:00
parent 0280396a33 b8f91fd49c
commit 3ea856094c
17 changed files with 93 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
docs/user/main.rst
View File

@ -45,67 +45,6 @@ emulator.
Linux User space emulator
-------------------------
Quick Start
~~~~~~~~~~~
In order to launch a Linux process, QEMU needs the process executable
itself and all the target (x86) dynamic libraries used by it.
- On x86, you can just try to launch any process by using the native
libraries::
qemu-i386 -L / /bin/ls
``-L /`` tells that the x86 dynamic linker must be searched with a
``/`` prefix.
- Since QEMU is also a linux process, you can launch QEMU with QEMU
(NOTE: you can only do that if you compiled QEMU from the sources)::
qemu-i386 -L / qemu-i386 -L / /bin/ls
- On non x86 CPUs, you need first to download at least an x86 glibc
(``qemu-runtime-i386-XXX-.tar.gz`` on the QEMU web page). Ensure that
``LD_LIBRARY_PATH`` is not set::
unset LD_LIBRARY_PATH
Then you can launch the precompiled ``ls`` x86 executable::
qemu-i386 tests/i386/ls
You can look at ``scripts/qemu-binfmt-conf.sh`` so that QEMU is
automatically launched by the Linux kernel when you try to launch x86
executables. It requires the ``binfmt_misc`` module in the Linux
kernel.
- The x86 version of QEMU is also included. You can try weird things
such as::
qemu-i386 /usr/local/qemu-i386/bin/qemu-i386 \
/usr/local/qemu-i386/bin/ls-i386
Wine launch
~~~~~~~~~~~
- Ensure that you have a working QEMU with the x86 glibc distribution
(see previous section). In order to verify it, you must be able to
do::
qemu-i386 /usr/local/qemu-i386/bin/ls-i386
- Download the binary x86 Wine install (``qemu-XXX-i386-wine.tar.gz``
on the QEMU web page).
- Configure Wine on your account. Look at the provided script
``/usr/local/qemu-i386/bin/wine-conf.sh``. Your previous
``${HOME}/.wine`` directory is saved to ``${HOME}/.wine.org``.
- Then you can try the example ``putty.exe``::
qemu-i386 /usr/local/qemu-i386/wine/bin/wine \
/usr/local/qemu-i386/wine/c/Program\ Files/putty.exe
Command line options
~~~~~~~~~~~~~~~~~~~~

1
linux-user/alpha/target_fcntl.h
View File

@ -23,6 +23,7 @@
#define TARGET_O_CLOEXEC 010000000
#define TARGET___O_SYNC 020000000
#define TARGET_O_PATH 040000000
#define TARGET___O_TMPFILE 0100000000
#define TARGET_F_GETLK 7
#define TARGET_F_SETLK 8

6
linux-user/alpha/target_signal.h
View File

@ -92,4 +92,10 @@ typedef struct target_sigaltstack {
#define TARGET_GEN_SUBRNG7 -25
#define TARGET_ARCH_HAS_SETUP_FRAME
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#endif /* ALPHA_TARGET_SIGNAL_H */

30
linux-user/elfload.c
View File

@ -2805,14 +2805,16 @@ static void load_elf_image(const char *image_name, int image_fd,
vaddr = load_bias + eppnt->p_vaddr;
vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
vaddr_ef = vaddr + eppnt->p_filesz;
vaddr_em = vaddr + eppnt->p_memsz;
/*
* Some segments may be completely empty without any backing file
* segment, in that case just let zero_bss allocate an empty buffer
* for it.
* Some segments may be completely empty, with a non-zero p_memsz
* but no backing file segment.
*/
if (eppnt->p_filesz != 0) {
vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po);
error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
MAP_PRIVATE | MAP_FIXED,
image_fd, eppnt->p_offset - vaddr_po);
@ -2820,14 +2822,22 @@ static void load_elf_image(const char *image_name, int image_fd,
if (error == -1) {
goto exit_mmap;
}
}
vaddr_ef = vaddr + eppnt->p_filesz;
vaddr_em = vaddr + eppnt->p_memsz;
/*
* If the load segment requests extra zeros (e.g. bss), map it.
*/
if (eppnt->p_filesz < eppnt->p_memsz) {
zero_bss(vaddr_ef, vaddr_em, elf_prot);
}
} else if (eppnt->p_memsz != 0) {
vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_memsz + vaddr_po);
error = target_mmap(vaddr_ps, vaddr_len, elf_prot,
MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS,
-1, 0);
/* If the load segment requests extra zeros (e.g. bss), map it. */
if (vaddr_ef < vaddr_em) {
zero_bss(vaddr_ef, vaddr_em, elf_prot);
if (error == -1) {
goto exit_mmap;
}
}
/* Find the full program boundaries. */

6
linux-user/generic/signal.h
View File

@ -54,4 +54,10 @@
#define TARGET_SIG_BLOCK 0 /* for blocking signals */
#define TARGET_SIG_UNBLOCK 1 /* for unblocking signals */
#define TARGET_SIG_SETMASK 2 /* for setting the signal mask */
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#endif

3
linux-user/generic/sockbits.h
View File

@ -55,4 +55,7 @@
#define TARGET_SO_ACCEPTCONN 30
#define TARGET_SO_PEERSEC 31
#define TARGET_SO_PROTOCOL 38
#define TARGET_SO_DOMAIN 39
#endif

4
linux-user/hppa/target_fcntl.h
View File

@ -8,7 +8,8 @@
#ifndef HPPA_TARGET_FCNTL_H
#define HPPA_TARGET_FCNTL_H
#define TARGET_O_NONBLOCK 000200004 /* HPUX has separate NDELAY & NONBLOCK */
#define TARGET_O_NONBLOCK 000200000
#define TARGET_O_NONBLOCK_MASK 000200004 /* includes old HP-UX NDELAY flag */
#define TARGET_O_APPEND 000000010
#define TARGET_O_CREAT 000000400 /* not fcntl */
#define TARGET_O_EXCL 000002000 /* not fcntl */
@ -21,6 +22,7 @@
#define TARGET_O_CLOEXEC 010000000
#define TARGET___O_SYNC 000100000
#define TARGET_O_PATH 020000000
#define TARGET___O_TMPFILE 040000000
#define TARGET_F_RDLCK 1
#define TARGET_F_WRLCK 2

5
linux-user/hppa/target_signal.h
View File

@ -66,4 +66,9 @@ typedef struct target_sigaltstack {
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_SIGSTKSZ 8192
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#endif /* HPPA_TARGET_SIGNAL_H */

2
linux-user/mips/sockbits.h
View File

@ -40,6 +40,8 @@
#define TARGET_SO_SNDTIMEO 0x1005 /* send timeout */
#define TARGET_SO_RCVTIMEO 0x1006 /* receive timeout */
#define TARGET_SO_ACCEPTCONN 0x1009
#define TARGET_SO_PROTOCOL 0x1028 /* protocol type */
#define TARGET_SO_DOMAIN 0x1029 /* domain/socket family */
/* linux-specific, might as well be the same as on i386 */
#define TARGET_SO_NO_CHECK 11

6
linux-user/mips/target_signal.h
View File

@ -73,4 +73,10 @@ typedef struct target_sigaltstack {
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#endif /* MIPS_TARGET_SIGNAL_H */

5
linux-user/mips64/syscall_nr.h
View File

@ -1,4 +1,7 @@
#ifdef TARGET_ABI_MIPSN32
#if defined(TARGET_ABI_MIPSO32)
#define TARGET_SYSCALL_OFFSET 4000
#include "syscall_o32_nr.h"
#elif defined(TARGET_ABI_MIPSN32)
#define TARGET_SYSCALL_OFFSET 6000
#include "syscall_n32_nr.h"
#else

3
linux-user/mips64/target_elf.h
View File

@ -12,6 +12,9 @@ static inline const char *cpu_get_model(uint32_t eflags)
if ((eflags & EF_MIPS_ARCH) == EF_MIPS_ARCH_64R6) {
return "I6400";
}
if ((eflags & EF_MIPS_MACH) == EF_MIPS_MACH_5900) {
return "R5900";
}
return "5KEf";
}
#endif

9
linux-user/mips64/target_signal.h
View File

@ -67,4 +67,13 @@ typedef struct target_sigaltstack {
#define TARGET_MINSIGSTKSZ 2048
#define TARGET_SIGSTKSZ 8192
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#if defined(TARGET_ABI_MIPSO32)
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
#define TARGET_ARCH_HAS_SETUP_FRAME
#endif
#endif /* MIPS64_TARGET_SIGNAL_H */

4
linux-user/mmap.c
View File

@ -724,7 +724,9 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
if (!guest_range_valid(old_addr, old_size) ||
((flags & MREMAP_FIXED) &&
!guest_range_valid(new_addr, new_size))) {
!guest_range_valid(new_addr, new_size)) ||
((flags & MREMAP_MAYMOVE) == 0 &&
!guest_range_valid(old_addr, new_size))) {
errno = ENOMEM;
return -1;
}

3
linux-user/signal.c
View File

@ -349,8 +349,7 @@ static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
case TARGET_SIGCHLD:
tinfo->_sifields._sigchld._pid = info->si_pid;
tinfo->_sifields._sigchld._uid = info->si_uid;
tinfo->_sifields._sigchld._status
= host_to_target_waitstatus(info->si_status);
tinfo->_sifields._sigchld._status = info->si_status;
tinfo->_sifields._sigchld._utime = info->si_utime;
tinfo->_sifields._sigchld._stime = info->si_stime;
si_type = QEMU_SI_CHLD;

6
linux-user/sparc/target_signal.h
View File

@ -68,4 +68,10 @@ typedef struct target_sigaltstack {
#define TARGET_SIGSTKSZ 16384
#define TARGET_ARCH_HAS_SETUP_FRAME
/* bit-flags */
#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
/* mask for all SS_xxx flags */
#define TARGET_SS_FLAG_BITS TARGET_SS_AUTODISARM
#endif /* SPARC_TARGET_SIGNAL_H */

18
linux-user/syscall.c
View File

@ -277,6 +277,11 @@ static type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, \
#define TARGET_NR__llseek TARGET_NR_llseek
#endif
/* some platforms need to mask more bits than just TARGET_O_NONBLOCK */
#ifndef TARGET_O_NONBLOCK_MASK
#define TARGET_O_NONBLOCK_MASK TARGET_O_NONBLOCK
#endif
#define __NR_sys_gettid __NR_gettid
_syscall0(int, sys_gettid)
@ -2832,6 +2837,12 @@ get_timeout:
case TARGET_SO_ACCEPTCONN:
optname = SO_ACCEPTCONN;
goto int_case;
case TARGET_SO_PROTOCOL:
optname = SO_PROTOCOL;
goto int_case;
case TARGET_SO_DOMAIN:
optname = SO_DOMAIN;
goto int_case;
default:
goto int_case;
}
@ -4909,6 +4920,7 @@ static abi_long do_ioctl_ifconf(const IOCTLEntry *ie, uint8_t *buf_temp,
struct ifconf *host_ifconf;
uint32_t outbufsz;
const argtype ifreq_arg_type[] = { MK_STRUCT(STRUCT_sockaddr_ifreq) };
const argtype ifreq_max_type[] = { MK_STRUCT(STRUCT_ifmap_ifreq) };
int target_ifreq_size;
int nb_ifreq;
int free_buf = 0;
@ -4932,7 +4944,7 @@ static abi_long do_ioctl_ifconf(const IOCTLEntry *ie, uint8_t *buf_temp,
host_ifconf = (struct ifconf *)(unsigned long)buf_temp;
target_ifc_buf = (abi_long)(unsigned long)host_ifconf->ifc_buf;
target_ifreq_size = thunk_type_size(ifreq_arg_type, 0);
target_ifreq_size = thunk_type_size(ifreq_max_type, 0);
if (target_ifc_buf != 0) {
target_ifc_len = host_ifconf->ifc_len;
@ -7777,7 +7789,7 @@ static abi_long do_signalfd4(int fd, abi_long mask, int flags)
sigset_t host_mask;
abi_long ret;
if (flags & ~(TARGET_O_NONBLOCK | TARGET_O_CLOEXEC)) {
if (flags & ~(TARGET_O_NONBLOCK_MASK | TARGET_O_CLOEXEC)) {
return -TARGET_EINVAL;
}
if (!lock_user_struct(VERIFY_READ, target_mask, mask, 1)) {
@ -12566,7 +12578,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
#if defined(TARGET_NR_eventfd2)
case TARGET_NR_eventfd2:
{
int host_flags = arg2 & (~(TARGET_O_NONBLOCK | TARGET_O_CLOEXEC));
int host_flags = arg2 & (~(TARGET_O_NONBLOCK_MASK | TARGET_O_CLOEXEC));
if (arg2 & TARGET_O_NONBLOCK) {
host_flags |= O_NONBLOCK;
}