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2023-06-13linux-user, bsd-user: Preserve incoming order of environment variables in ↵Andreas Schwab
the target Do not reverse the order of environment variables in the target environ array relative to the incoming environ order. Some testsuites depend on a specific order, even though it is not defined by any standard. Signed-off-by: Andreas Schwab <schwab@suse.de> Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <mvmlejfsivd.fsf@suse.de> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-05-17Merge tag 'linux-user-for-8.1-pull-request' of ↵Richard Henderson
https://github.com/vivier/qemu into staging linux-user pull request 20230512-v4 add open_tree(), move_mount() add /proc/cpuinfo for riscv fixes and cleanup # -----BEGIN PGP SIGNATURE----- # # iQJGBAABCAAwFiEEzS913cjjpNwuT1Fz8ww4vT8vvjwFAmRkiZISHGxhdXJlbnRA # dml2aWVyLmV1AAoJEPMMOL0/L748FdIP/RC1JaCftkP7ajAstNbZLMLegMxjUYHV # TrdhsMOsm804ZmLgTqqfS3bJ080mIHup0xUnHBckcEtUcwaz54cJ1BAR2WlM3/8A # t3fHMt3PDkh3OPd/3AnmpLE8XRh7yBztirPYfZc6SKqnFzT0TZrwBoQnwprEnZ5r # c0gbrgLZLunZhrWU1BbQmuIufW1qDoQo4PzwnyZeux1fHA1/v/dx3wgSLpv3V4k6 # x0Kj8TvtMUU4/io2RqYF4jKopfhwsh0jnr9rlOmydOExalKq1VbRptJI2UC4KVOY # MZuApF1EaZfrW+v/WSlvmzaZ/zRzP1L0X3Xh0wB4J9Rj3057/elXr6bi+R+rM46p # xGTcti9ahWKP2J4/xrazRw2lfPsLcw/YbqVGG79AX1xLJPCiWq6lamzc/g3ptFnx # F/RRETe65z7apzF/nzU7SDOsMdN5p4/fMb1SysLuAov5OepNVjNVWyiTgqOHB5uC # ye+lOYkkvk+qRdMbls/fIcjDQ3C4AjoBWj4QlgRc0/Qf6ac4TkVjzPa70Y6eyzzS # LEV9D4fXD8EZgYWENNGmbbKPNbtfqc9uR6gXdgkEsKDx/rf5IMf1d6r1C99dhB3A # nbu0JpFKKY2lhD2oGVPDE3UQMW9DXXhZpDApUBsLNiEwfuoXZee+apH+6jc8tbn6 # r+8LFB1mM9os # =NfIV # -----END PGP SIGNATURE----- # gpg: Signature made Wed 17 May 2023 01:00:18 AM PDT # gpg: using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C # gpg: issuer "laurent@vivier.eu" # gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [undefined] # gpg: aka "Laurent Vivier <laurent@vivier.eu>" [undefined] # gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [undefined] # 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: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C * tag 'linux-user-for-8.1-pull-request' of https://github.com/vivier/qemu: linux-user: fix getgroups/setgroups allocations linux-user: Fix mips fp64 executables loading linux-user: Don't require PROT_READ for mincore linux-user: Add new flag VERIFY_NONE linux-user/main: Use list_cpus() instead of cpu_list() linux-user: Add open_tree() syscall linux-user: Add move_mount() syscall linux-user: report ENOTTY for unknown ioctls linux-user: Emulate /proc/cpuinfo output for riscv Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-05-17linux-user/main: Use list_cpus() instead of cpu_list()Thomas Huth
This way we can get rid of the if'deffery and the XXX comment here (it's repeated in the list_cpus() function anyway). Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20230424122126.236586-1-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-05-02linux-user: Add '-one-insn-per-tb' option equivalent to '-singlestep'Peter Maydell
The '-singlestep' option is confusing, because it doesn't actually have anything to do with single-stepping the CPU. What it does do is force TCG emulation to put one guest instruction in each TB, which can be useful in some situations. Create a new command line argument -one-insn-per-tb, so we can document that -singlestep is just a deprecated synonym for it, and eventually perhaps drop it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20230417164041.684562-5-peter.maydell@linaro.org
2023-05-02accel/tcg: Use one_insn_per_tb global instead of old singlestep globalPeter Maydell
The only place left that looks at the old 'singlestep' global variable is the TCG curr_cflags() function. Replace the old global with a new 'one_insn_per_tb' which is defined in tcg-all.c and declared in accel/tcg/internal.h. This keeps it restricted to the TCG code, unlike 'singlestep' which was available to every file in the system and defined in multiple different places for softmmu vs linux-user vs bsd-user. While we're making this change, use qatomic_read() and qatomic_set() on the accesses to the new global, because TCG will read it without holding a lock. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-id: 20230417164041.684562-4-peter.maydell@linaro.org
2023-05-02make one-insn-per-tb an accel optionPeter Maydell
This commit adds 'one-insn-per-tb' as a property on the TCG accelerator object, so you can enable it with -accel tcg,one-insn-per-tb=on It has the same behaviour as the existing '-singlestep' command line option. We use a different name because 'singlestep' has always been a confusing choice, because it doesn't have anything to do with single-stepping the CPU. What it does do is force TCG emulation to put one guest instruction in each TB, which can be useful in some situations (such as analysing debug logs). The existing '-singlestep' commandline options are decoupled from the global 'singlestep' variable and instead now are syntactic sugar for setting the accel property. (These can then go away after a deprecation period.) The global variable remains for the moment as: * what the TCG code looks at to change its behaviour * what HMP and QMP use to query and set the behaviour In the following commits we'll clean those up to not directly look at the global variable. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20230417164041.684562-2-peter.maydell@linaro.org
2023-03-28include/exec: Change reserved_va semantics to last byteRichard Henderson
Change the semantics to be the last byte of the guest va, rather than the following byte. This avoids some overflow conditions. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-28linux-user: Diagnose misaligned -R sizeRichard Henderson
We have been enforcing host page alignment for the non-R fallback of MAX_RESERVED_VA, but failing to enforce for -R. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-03-12Merge tag 'linux-user-for-8.0-pull-request' of ↵Peter Maydell
https://gitlab.com/laurent_vivier/qemu into staging Pull request linux-user 20230308-v2 Fix gdt on i386/x86_64 Handle traps on sparc Add translation for argument of msync Emulate CLONE_PIDFD flag in clone handle netlink flag NLA_F_NESTED fix sockaddr_in6 endianness Fix brk() to release pages fill out task state in /proc/self/stat add support for xtensa FDPIC Fix unaligned memory access in prlimit64 syscall add target to host netlink conversions fix timerfd read endianness conversion Fix access to /proc/self/exe Add strace for prlimit64() syscall # -----BEGIN PGP SIGNATURE----- # # iQJGBAABCAAwFiEEzS913cjjpNwuT1Fz8ww4vT8vvjwFAmQLqmMSHGxhdXJlbnRA # dml2aWVyLmV1AAoJEPMMOL0/L748e+cP/3XYMvPbExNi09idDvgzzBrFFHgnkCnK # WAV/laxjHSJkzRNK06jD5KN/G2Osy587GXAWLaN76Y8mYMNJs5x3wwlBrJm0RyeJ # mWeETJOjxsFjW1+5LKhYv6fwiDxQcyJUoRKzJI27fYgDS+H+zIpa+uhy82Ah543z # i/HPyerp25TWAuVyR6mQICt7cne+4yjhtcjg0GXmnvm2+UVp54FGjesjwpSdbALl # OKdCre/JaNOkKoaRSsxm0UhNEyQarJIEf/dv0fTjsEpvNX2SMuLUGCm+n23wjXGN # fdnSGkoVe8hHxBtG80Zx8AMfKEmJoVsQw9rSg4HwQKOyrYPnLhHjb8ln43X+f3MN # gq9lDBIxH82LH2Q5JqQQe7S2UJycpYb+qj0xm7llH7Wl9VVKG6hRX/Cd7I1PQLEv # baPIrtye5TuR6uo0kn6HBB+Hd9RNu2PPHelmEFIGEuNaAPkyOt4FhKFIE/j0BTcg # mFVCNj6Os805ks0sjIBvpTU1DBtuqpLxdvvHOwxYKCNThTl70wfHJJEjumfvZ4qT # T+me7hRsd+8v1rRjxYGuJn2gqC7JL8miuJCYlZkn2DfMAunmF00U5ULe9KiCJ8V3 # kDfvO+CdnIN4MSlbtwt+eRSFCmJGGkzZ/jshVxPF3ZVirFu/undphYQnaEZDH+Xd # KsPOh8MekMgJ # =e55j # -----END PGP SIGNATURE----- # gpg: Signature made Fri 10 Mar 2023 22:08:35 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 * tag 'linux-user-for-8.0-pull-request' of https://gitlab.com/laurent_vivier/qemu: (28 commits) linux-user: fix bug about incorrect base addresss of gdt on i386 and x86_64 linux-user/sparc: Handle tag overflow traps linux-user/sparc: Handle floating-point exceptions linux-user/sparc: Handle unimplemented flush trap linux-user/sparc: Handle coprocessor disabled trap linux-user/sparc: Handle privilidged action trap linux-user/sparc: Handle priviledged opcode trap linux-user/sparc: Handle getcc, setcc, getpsr traps linux-user/sparc: Handle division by zero traps linux-user/sparc: Handle software breakpoint trap linux-user/sparc: Fix sparc64_{get, set}_context traps linux-user/sparc: Tidy window spill/fill traps linux-user/sparc: Use TT_TRAP for flush windows linux-user/sparc: Tidy syscall error return linux-user/sparc: Tidy syscall trap linux-user: Emulate CLONE_PIDFD flag in clone() linux-user: Add translation for argument of msync() linux-user: handle netlink flag NLA_F_NESTED linux-user: fix sockaddr_in6 endianness linux-user: Add strace for prlimit64() syscall ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-03-10linux-user: fix bug about incorrect base addresss of gdt on i386 and x86_64fanwj@mail.ustc.edu.cn
On linux user mode, CPUX86State::gdt::base from Different CPUX86State Objects have same value, It is incorrect! Every CPUX86State::gdt::base Must points to independent memory space. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1405 Signed-off-by: fanwenjie <fanwj@mail.ustc.edu.cn> Message-Id: <4172b90.58b08.18631b77860.Coremail.fanwj@mail.ustc.edu.cn> [lv: remove unnecessary casts, split overlong line] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-10linux-user: Fix access to /proc/self/exeHelge Deller
When accsssing /proc/self/exe from a userspace program, linux-user tries to resolve the name via realpath(), which may fail if the process changed the working directory in the meantime. An example: - a userspace program ist started with ./testprogram - the program runs chdir("/tmp") - then the program calls readlink("/proc/self/exe") - linux-user tries to run realpath("./testprogram") which fails because ./testprogram isn't in /tmp - readlink() will return -ENOENT back to the program Avoid this issue by resolving the full path name of the started process at startup of linux-user and store it in real_exec_path[]. This then simplifies the emulation of readlink() and readlinkat() as well, because they can simply copy the path string to userspace. I noticed this bug because the testsuite of the debian package "pandoc" failed on linux-user while it succeeded on real hardware. The full log is here: https://buildd.debian.org/status/fetch.php?pkg=pandoc&arch=hppa&ver=2.17.1.1-1.1%2Bb1&stamp=1670153210&raw=0 Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20221205113825.20615-1-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2023-03-07gdbstub: move chunks of user code into own filesAlex Bennée
The process was pretty similar to the softmmu move except we take the time to split stuff between user.c and user-target.c to avoid as much target specific compilation as possible. We also start to make use of our shiny new header scheme so the user-only helpers can be included without the rest of the exec/gsbstub.h cruft. As before we split some functions into user and softmmu versions Reviewed-by: Fabiano Rosas <farosas@suse.de> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230302190846.2593720-12-alex.bennee@linaro.org> Message-Id: <20230303025805.625589-12-richard.henderson@linaro.org>
2023-02-21linux-user: Always exit from exclusive state in fork_end()Ilya Leoshkevich
fork()ed processes currently start with current_cpu->in_exclusive_context set, which is, strictly speaking, not correct, but does not cause problems (even assertion failures). With one of the next patches, the code begins to rely on this value, so fix it by always calling end_exclusive() in fork_end(). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20230214140829.45392-2-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-01-16tcg: add perfmap and jitdumpIlya Leoshkevich
Add ability to dump /tmp/perf-<pid>.map and jit-<pid>.dump. The first one allows the perf tool to map samples to each individual translation block. The second one adds the ability to resolve symbol names, line numbers and inspect JITed code. Example of use: perf record qemu-x86_64 -perfmap ./a.out perf report or perf record -k 1 qemu-x86_64 -jitdump ./a.out DEBUGINFOD_URLS= perf inject -j -i perf.data -o perf.data.jitted perf report -i perf.data.jitted Co-developed-by: Vanderson M. do Rosario <vandersonmr2@gmail.com> Co-developed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20230112152013.125680-4-iii@linux.ibm.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-10-06plugins: add [pre|post]fork helpers to linux-userAlex Bennée
Special care needs to be taken in ensuring locks are in a consistent state across fork events. Add helpers so the plugin system can ensure that. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Fixes: https://gitlab.com/qemu-project/qemu/-/issues/358 Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Tested-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20221004115221.2174499-1-alex.bennee@linaro.org>
2022-09-27linux-user/hppa: Increase guest stack size to 80MB for hppa targetHelge Deller
The hppa target requires a much bigger stack than many other targets, and the Linux kernel allocates 80 MB by default for it. This patch increases the guest stack for hppa to 80MB, and prevents that this default stack size gets reduced by a lower stack limit on the host. Since the stack grows upwards on hppa, the stack_limit value marks the upper boundary of the stack. Fix the output of /proc/self/maps (in the guest) to show the [stack] marker on the correct memory area. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20220924114501.21767-6-deller@gmx.de> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-06-28semihosting: Create qemu_semihosting_guestfd_initRichard Henderson
For arm-compat, initialize console_{in,out}_gf; otherwise, initialize stdio file descriptors. This will go some way to cleaning up arm-compat, and will allow other semihosting to use normal stdio. Reviewed-by: Luc Michel <lmichel@kalray.eu> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-05-23linux-user: Clean up arg_start/arg_end confusionRichard Henderson
We had two sets of variables: arg_start/arg_end, and arg_strings/env_strings. In linuxload.c, we set the first pair to the bounds of the argv strings, but in elfload.c, we set the first pair to the bounds of the argv pointers and the second pair to the bounds of the argv strings. Remove arg_start/arg_end, replacing them with the standard argc/argv/envc/envp values. Retain arg_strings/env_strings with the meaning we were using in elfload.c. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/714 Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220427025129.160184-1-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-04-21include: rename qemu-common.h qemu/help-texts.hMarc-André Lureau
Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20220420132624.2439741-7-marcandre.lureau@redhat.com>
2022-04-20Merge tag 'pull-tcg-20220420' of https://gitlab.com/rth7680/qemu into stagingRichard Henderson
Cleanup sysemu/tcg.h usage. Fix indirect lowering vs cond branches Remove ATOMIC_MMU_IDX Add tcg_constant_ptr # -----BEGIN PGP SIGNATURE----- # # iQFRBAABCgA7FiEEekgeeIaLTbaoWgXAZN846K9+IV8FAmJgW38dHHJpY2hhcmQu # aGVuZGVyc29uQGxpbmFyby5vcmcACgkQZN846K9+IV8tpggApfg2CDI0bRMDBh0g # 04/xwNnzHuSa84/ocMOMUfD5pvBblUmeTH8fAwqcAPDM/EEZwWZl2V1bYzuIrbmR # 8zV+r1cOenDF5Tz8PWfy8XssinTVtTWh/TE0XNV9R/SbEM9eMsjHNu5osKVuLuq1 # rnHWZf8LuY7xGsy4GYqPN0dLE6HtQOfpj/eLGRAj9mZ7re0jKeWg3GdxYoiYDmks # NKmNHYcWD+SjjFvXlOafniQsHbBZmQc/qp7AShG/+VcYY9o1VfncWD6I2dV13RdB # N7++ZhGyQR4NOVo6CN1zLKhfuJqzH2q+qJ7vQ3xtXNAk53LGQ91zjoE+3KaJTrcy # dmnLUw== # =aKdS # -----END PGP SIGNATURE----- # gpg: Signature made Wed 20 Apr 2022 12:14:07 PM PDT # gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F # gpg: issuer "richard.henderson@linaro.org" # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate] * tag 'pull-tcg-20220420' of https://gitlab.com/rth7680/qemu: tcg: Add tcg_constant_ptr accel/tcg: Remove ATOMIC_MMU_IDX tcg: Fix indirect lowering vs TCG_OPF_COND_BRANCH Don't include sysemu/tcg.h if it is not necessary Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-04-20Don't include sysemu/tcg.h if it is not necessaryThomas Huth
This header only defines the tcg_allowed variable and the tcg_enabled() function - which are not required in many files that include this header. Drop the #include statement there. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220315144107.1012530-1-thuth@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2022-04-20linux-user: Use qemu_set_log_filename_flagsRichard Henderson
Perform all logfile setup in one step. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-30-richard.henderson@linaro.org>
2022-04-20linux-user: Expand log_page_dump inlineRichard Henderson
We have extra stuff to log at the same time. Hoist the qemu_log_lock/unlock to the caller and use fprintf. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-23-richard.henderson@linaro.org>
2022-04-20util/log: Pass Error pointer to qemu_set_logRichard Henderson
Do not force exit within qemu_set_log; return bool and pass an Error value back up the stack as per usual. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-5-richard.henderson@linaro.org>
2022-04-20util/log: Drop manual log bufferingRichard Henderson
This buffering was introduced during the Paleozoic: 9fa3e853531. There has never been an explanation as to why we may not allow glibc to allocate the file buffer itself. We certainly have many other uses of mmap and malloc during user-only startup, so presumably whatever the issue was, it has been fixed during the preceeding 18 years. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220417183019.755276-2-richard.henderson@linaro.org>
2022-01-28linux-user: Implement starttime field in self stat emulationCameron Esfahani
Instead of always returning 0, return actual starttime. Signed-off-by: Cameron Esfahani <dirty@apple.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20220128001251.45165-1-dirty@apple.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-16Merge remote-tracking branch ↵Peter Maydell
'remotes/vivier2/tags/linux-user-for-6.2-pull-request' into staging Pull request linux-user 20210916 Code cleanup # gpg: Signature made Thu 16 Sep 2021 16:11:58 BST # 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-6.2-pull-request: linux-user: Check lock_user result for ip_mreq_source sockopts linux-user: Drop unneeded includes from qemu.h linux-user: Don't include gdbstub.h in qemu.h linux-user: Split linux-user internals out of qemu.h linux-user: Split safe-syscall macro into its own header linux-user: Split mmap prototypes into user-mmap.h linux-user: Split loader-related prototypes into loader.h linux-user: Split signal-related prototypes into signal-common.h linux-user: Split strace prototypes into strace.h linux-user: Fix coding style nits in qemu.h Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-09-14user: Remove cpu_get_pic_interrupt() stubsPhilippe Mathieu-Daudé
cpu_get_pic_interrupt() is now unreachable from user-mode, delete the unnecessary stubs. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210911165434.531552-25-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-13linux-user: Don't include gdbstub.h in qemu.hPeter Maydell
Currently the linux-user qemu.h pulls in gdbstub.h. There's no real reason why it should do this; include it directly from the C files which require it, and drop the include line in qemu.h. (Note that several of the C files previously relying on this indirect include were going out of their way to only include gdbstub.h conditionally on not CONFIG_USER_ONLY!) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210908154405.15417-9-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-13linux-user: Split linux-user internals out of qemu.hPeter Maydell
qemu.h is included in various non-linux-user files (which mostly want the TaskState struct and the functions for doing usermode access to guest addresses like lock_user(), unlock_user(), get_user*(), etc). Split out the parts that are only used in linux-user itself into a new user-internals.h. This leaves qemu.h with basically three things: * the definition of the TaskState struct * the user-access functions and macros * do_brk() all of which are needed by code outside linux-user that includes qemu.h. The addition of all the extra #include lines was done with sed -i '/include.*qemu\.h/a #include "user-internals.h"' $(git grep -l 'include.*qemu\.h' linux-user) (and then undoing the change to fpa11.h). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210908154405.15417-8-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-13linux-user: Split mmap prototypes into user-mmap.hPeter Maydell
Split out the mmap prototypes into a new header user-mmap.h which we only include where required. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210908154405.15417-6-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-13linux-user: Split loader-related prototypes into loader.hPeter Maydell
Split guest-binary loader prototypes out into a new header loader.h which we include only where required. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210908154405.15417-5-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-13linux-user: Split signal-related prototypes into signal-common.hPeter Maydell
Split the signal related prototypes into the existing header file signal-common.h, and include it in those places that now require it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210908154405.15417-4-peter.maydell@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-09-02plugins: allow plugin arguments to be passed directlyMahmoud Mandour
Passing arguments to plugins had to be done through "arg=<argname>". This is redundant and introduces confusion especially when the argument has a name and value (e.g. `-plugin plugin_name,arg="argname=argvalue"`). This allows passing plugin arguments directly e.g: `-plugin plugin_name,argname=argvalue` For now, passing arguments through "arg=" is still supports but outputs a deprecation warning. Also, this commit makes boolean arguments passed to plugins in the `argname=on|off` form instead of the deprecated short-boolean form. Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com> Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20210730135817.17816-2-ma.mandourr@gmail.com>
2021-07-12fd-trans: Fix race condition on reallocation of the translation table.Owen Anderson
The mapping from file-descriptors to translator functions is not guarded on realloc which may cause invalid function pointers to be read from a previously deallocated mapping. Signed-off-by: Owen Anderson <oanderso@google.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20210701221255.107976-1-oanderso@google.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-06-11tcg: Re-order tcg_region_init vs tcg_prologue_initRichard Henderson
Instead of delaying tcg_region_init until after tcg_prologue_init is complete, do tcg_region_init first and let tcg_prologue_init shrink the first region by the size of the generated prologue. Reviewed-by: Luis Pires <luis.pires@eldorado.org.br> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-15linux-user: Remove dead codePhilippe Mathieu-Daudé
We can not use watchpoints in user-mode emulation because we need the softmmu slow path to detect accesses to watchpointed memory. This code is expanded as empty stub in "hw/core/cpu.h" anyway, so we can drop it. Reviewed-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20210303214708.1727801-18-f4bug@amsat.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-05-10accel: move call to accel_init_interfacesClaudio Fontana
move the call for sysemu specifically in machine_run_board_init, mirror the calling sequence for user mode too. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Claudio Fontana <cfontana@suse.de> Message-Id: <20210322132800.7470-23-cfontana@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-05-02Do not include cpu.h if it's not really necessaryThomas Huth
Stop including cpu.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-4-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-03-13linux-user: manage binfmt-misc preserve-arg[0] flagLaurent Vivier
Add --preserve-argv0 in qemu-binfmt-conf.sh to configure the preserve-argv0 flag. This patch allows to use new flag in AT_FLAGS to detect if preserve-argv0 is configured for this interpreter: argv[0] (the full pathname provided by binfmt-misc) is removed and replaced by argv[1] (the original argv[0] provided by binfmt-misc when 'P'/preserve-arg[0] is set) For instance with this patch and kernel support for AT_FLAGS: $ sudo chroot m68k-chroot sh -c 'echo $0' sh without this patch: $ sudo chroot m68k-chroot sh -c 'echo $0' /usr/bin/sh The new flag is available in kernel (v5.12) since: 2347961b11d4 ("binfmt_misc: pass binfmt_misc flags to the interpreter") This can be tested with something like: # cp ..../qemu-ppc /chroot/powerpc/jessie # qemu-binfmt-conf.sh --qemu-path / --systemd ppc --credential yes \ --persistent no --preserve-argv0 yes # systemctl restart systemd-binfmt.service # cat /proc/sys/fs/binfmt_misc/qemu-ppc enabled interpreter //qemu-ppc flags: POC offset 0 magic 7f454c4601020100000000000000000000020014 mask ffffffffffffff00fffffffffffffffffffeffff # chroot /chroot/powerpc/jessie sh -c 'echo $0' sh # qemu-binfmt-conf.sh --qemu-path / --systemd ppc --credential yes \ --persistent no --preserve-argv0 no # systemctl restart systemd-binfmt.service # cat /proc/sys/fs/binfmt_misc/qemu-ppc enabled interpreter //qemu-ppc flags: OC offset 0 magic 7f454c4601020100000000000000000000020014 mask ffffffffffffff00fffffffffffffffffffeffff # chroot /chroot/powerpc/jessie sh -c 'echo $0' /bin/sh Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20210222105004.1642234-1-laurent@vivier.eu>
2021-03-06accel/tcg: Precompute curr_cflags into cpu->tcg_cflagsRichard Henderson
The primary motivation is to remove a dozen insns along the fast-path in tb_lookup. As a byproduct, this allows us to completely remove parallel_cpus. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-16exec: Use uintptr_t for guest_baseRichard Henderson
This is more descriptive than 'unsigned long'. No functional change, since these match on all linux+bsd hosts. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210212184902.1251044-4-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-02-05accel: replace struct CpusAccel with AccelOpsClassClaudio Fontana
This will allow us to centralize the registration of the cpus.c module accelerator operations (in accel/accel-softmmu.c), and trigger it automatically using object hierarchy lookup from the new accel_init_interfaces() initialization step, depending just on which accelerators are available in the code. Rename all tcg-cpus.c, kvm-cpus.c, etc to tcg-accel-ops.c, kvm-accel-ops.c, etc, matching the object type names. Signed-off-by: Claudio Fontana <cfontana@suse.de> Message-Id: <20210204163931.7358-18-cfontana@suse.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-02-05accel: extend AccelState and AccelClass to user-modeClaudio Fontana
Signed-off-by: Claudio Fontana <cfontana@suse.de> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> [claudio: rebased on Richard's splitwx work] Signed-off-by: Claudio Fontana <cfontana@suse.de> Message-Id: <20210204163931.7358-17-cfontana@suse.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-01-07tcg: Add --accel tcg,split-wx propertyRichard Henderson
Plumb the value through to alloc_code_gen_buffer. This is not supported by any os or tcg backend, so for now enabling it will result in an error. Reviewed-by: Joelle van Dyne <j@getutm.app> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-12-15plugin: propagate errorsPaolo Bonzini
qemu_finish_machine_init currently can only exit QEMU if it fails. Prepare for giving it proper error propagation, and possibly for adding a plugin_add monitor command that calls an accelerator method. While at it, make all errors from plugin_load look the same. Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-11-11trace: remove argument from trace_init_filePaolo Bonzini
It is not needed, all the callers are just saving what was retrieved from -trace and trace_init_file can retrieve it on its own. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 20201102115841.4017692-1-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-07-27linux-user: Ensure mmap_min_addr is non-zeroRichard Henderson
When the chroot does not have /proc mounted, we can read neither /proc/sys/vm/mmap_min_addr nor /proc/sys/maps. The enforcement of mmap_min_addr in the host kernel is done by the security module, and so does not apply to processes owned by root. Which leads pgd_find_hole_fallback to succeed in probing a reservation at address 0. Which confuses pgb_reserved_va to believe that guest_base has not actually been initialized. We don't actually want NULL addresses to become accessible, so make sure that mmap_min_addr is initialized with a non-zero value. Buglink: https://bugs.launchpad.net/qemu/+bug/1888728 Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Acked-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200724212314.545877-1-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-05-15exec/cpu-all: Use bool for have_guest_baseRichard Henderson
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200513175134.19619-6-alex.bennee@linaro.org>
2020-05-15linux-user: completely re-write init_guest_spaceAlex Bennée
First we ensure all guest space initialisation logic comes through probe_guest_base once we understand the nature of the binary we are loading. The convoluted init_guest_space routine is removed and replaced with a number of pgb_* helpers which are called depending on what requirements we have when loading the binary. We first try to do what is requested by the host. Failing that we try and satisfy the guest requested base address. If all those options fail we fall back to finding a space in the memory map using our recently written read_self_maps() helper. There are some additional complications we try and take into account when looking for holes in the address space. We try not to go directly after the system brk() space so there is space for a little growth. We also don't want to have to use negative offsets which would result in slightly less efficient code on x86 when it's unable to use the segment offset register. Less mind-binding gotos and hopefully clearer logic throughout. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200513175134.19619-5-alex.bennee@linaro.org>
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