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2024-03-13gdbstub: Save target's siginfoGustavo Romero
Save target's siginfo into gdbserver_state so it can be used later, for example, in any stub that requires the target's si_signo and si_code. This change affects only linux-user mode. Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org> Suggested-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240309030901.1726211-4-gustavo.romero@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2024-03-13gdbstub: Rename back gdb_handlesigGustavo Romero
Rename gdb_handlesig_reason back to gdb_handlesig. There is no need to add a wrapper for gdb_handlesig and rename it when a new parameter is added. Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20240309030901.1726211-2-gustavo.romero@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2024-03-06gdbstub: Call gdbserver_fork() both in parent and in childIlya Leoshkevich
The upcoming follow-fork-mode child support requires post-fork message exchange between the parent and the child. Prepare gdbserver_fork() for this purpose. Rename it to gdbserver_fork_end() to better reflect its purpose. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20240219141628.246823-8-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-9-alex.bennee@linaro.org>
2024-03-06{linux,bsd}-user: Pass pid to gdbserver_fork()Ilya Leoshkevich
The upcoming follow-fork-mode child support requires knowing the child pid. Pass it down. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20240219141628.246823-7-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-8-alex.bennee@linaro.org>
2024-03-06{linux,bsd}-user: Pass pid to fork_end()Ilya Leoshkevich
The upcoming follow-fork-mode child support requires knowing the child pid. Pass it down. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20240219141628.246823-6-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-7-alex.bennee@linaro.org>
2024-03-06gdbstub: Introduce gdbserver_fork_start()Ilya Leoshkevich
The upcoming follow-fork-mode child support requires knowing when fork() is about to happen in order to initialize its state. Add a hook for that. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-Id: <20240219141628.246823-5-iii@linux.ibm.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-6-alex.bennee@linaro.org>
2024-03-06{linux,bsd}-user: Update ts_tid after fork()Ilya Leoshkevich
Currently ts_tid contains the parent tid after fork(), which is not correct. So far it has not affected anything, but the upcoming follow-fork-mode child support relies on the correct value, so fix it. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20240219141628.246823-4-iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20240305121005.3528075-5-alex.bennee@linaro.org>
2024-02-29linux-user: Bound mmap_min_addr by host page sizeRichard Henderson
Bizzarely, it is possible to set /proc/sys/vm/mmap_min_addr to a value below the host page size. Fix that. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Helge Deller <deller@gmx.de> Message-Id: <20240102015808.132373-32-richard.henderson@linaro.org>
2024-02-29linux-user: Allow TARGET_PAGE_BITS_VARYRichard Henderson
If set, match the host and guest page sizes. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Acked-by: Helge Deller <deller@gmx.de> Message-Id: <20240102015808.132373-30-richard.henderson@linaro.org>
2024-02-29*-user: Deprecate and disable -p pagesizeRichard Henderson
This option controls the host page size. From the mis-usage in our own testsuite, this is easily confused with guest page size. The only thing that occurs when changing the host page size is that stuff breaks, because one cannot actually change the host page size. Therefore reject all but the no-op setting as part of the deprecation process. Reviewed-by: Warner Losh <imp@bsdimp.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Acked-by: Helge Deller <deller@gmx.de> Message-Id: <20240102015808.132373-27-richard.henderson@linaro.org>
2024-02-29linux-user: Remove qemu_host_page_size from mainRichard Henderson
Use qemu_real_host_page_size() instead. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com> Acked-by: Helge Deller <deller@gmx.de> Message-Id: <20240102015808.132373-16-richard.henderson@linaro.org>
2024-01-29accel/tcg: Move perf and debuginfo support to tcg/Ilya Leoshkevich
tcg/ should not depend on accel/tcg/, but perf and debuginfo support provided by the latter are being used by tcg/tcg.c. Since that's the only user, move both to tcg/. Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-ID: <20231212003837.64090-5-iii@linux.ibm.com> Message-Id: <20240125054631.78867-5-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-19cli: Remove deprecated '-singlestep' command line optionPhilippe Mathieu-Daudé
This option has been deprecated before the 8.1 release, in commit 12fd0f41d0 ("Document that -singlestep command line option is deprecated"). Time to drop it. Inspired-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-ID: <20240117151430.29235-4-philmd@linaro.org> Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-11-07hw/cpu: Clean up global variable shadowingPhilippe Mathieu-Daudé
Fix: hw/core/machine.c:1302:22: error: declaration shadows a variable in the global scope [-Werror,-Wshadow] const CPUArchId *cpus = possible_cpus->cpus; ^ hw/core/numa.c:69:17: error: declaration shadows a variable in the global scope [-Werror,-Wshadow] uint16List *cpus = NULL; ^ hw/acpi/aml-build.c:2005:20: error: declaration shadows a variable in the global scope [-Werror,-Wshadow] CPUArchIdList *cpus = ms->possible_cpus; ^ hw/core/machine-smp.c:77:14: error: declaration shadows a variable in the global scope [-Werror,-Wshadow] unsigned cpus = config->has_cpus ? config->cpus : 0; ^ include/hw/core/cpu.h:589:17: note: previous declaration is here extern CPUTailQ cpus; ^ Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Ani Sinha <anisinha@redhat.com> Message-Id: <20231010115048.11856-2-philmd@linaro.org>
2023-10-04tcg: Split out tcg init functions to tcg/startup.hRichard Henderson
The tcg/tcg.h header is a big bucket, containing stuff related to the translators and the JIT backend. The places that initialize tcg or create new threads do not need all of that, so split out these three functions to a new header. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04tcg: Remove argument to tcg_prologue_initRichard Henderson
We can load tcg_ctx just as easily within the callee. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-10-04accel/tcg: Replace CPUState.env_ptr with cpu_env()Richard Henderson
Reviewed-by: Anton Johansson <anjo@rev.ng> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Define ELF_ET_DYN_BASE in $guest/target_mman.hRichard Henderson
Copy each guest kernel's default value, then bound it against reserved_va or the host address space. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-08linux-user: Adjust task_unmapped_base for reserved_vaRichard Henderson
Ensure that the chosen values for mmap_next_start and task_unmapped_base are within the guest address space. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-08-06linux-user: Properly set image_info.brk in flatloadRichard Henderson
The heap starts at "brk" not "start_brk". With this fixed, image_info.start_brk is unused and may be removed. Tested-by: Helge Deller <deller@gmx.de> Reviewed-by: Helge Deller <deller@gmx.de> Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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>
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