~proot/proot/trunk : changes

~proot/proot/trunk » Changes from revision 750

From Revision 750 to 731

Rev	Summary	Authors	Date
750	Merge pull request #131 from jorge-lip/bugfix-removetemp Merge pull request #131 from jorge-lip/bugfix-removetemp fix tmp cleanup on non ext fs	jopasserat	6 years ago
749	Merge pull request #116 from proot-me/port_mapper Merge pull request #116 from proot-me/port_mapper Implement port mapping feature in PRoot to relocate services running on privileged ports or avoid port clash for applications running within PRoot.	jopasserat	6 years ago
748	Merge branch 'next' Merge branch 'next'	Jonathan Passerat-Pa...	6 years ago
747	Add --kill-on-exit option Add --kill-on-exit option Add --kill-on-exit option which kills all tracees when the initial process exits. This option can be used to garbage collect detached tracees which may be left around and which would block unexpectedly the proot process from exiting. Add tests/test-killexit.sh unit test.	Christophe Guillon	6 years ago
746	Merge pull request #117 from proot-me/lc_all Merge pull request #117 from proot-me/lc_all Use LC_ALL instead of LANG	Nicolas Cornu	7 years ago
745	fix: update URLs to proot-me.github.io fix: update URLs to proot-me.github.io	Jonathan Passerat-Pa...	7 years ago
744	add: gitignore add: gitignore	Jonathan Passerat-Pa...	7 years ago
743	Merge pull request #108 from proot-me/hotfixLoader Merge pull request #108 from proot-me/hotfixLoader Fix use of size	jopasserat	7 years ago
742	Update PRoot changelog. Update PRoot changelog.	Cédric VINCENT	9 years ago
741	Fix use-after-free: there's only one spot where tracees can ... Fix use-after-free: there's only one spot where tracees can be safely freed. This spot is right before calling waitpid(): at this moment no tracees are supposed to be pointed to.	Cédric VINCENT	9 years ago
740	Load dynamic shared objects to their explicit base address i... Load dynamic shared objects to their explicit base address if any. Usually, dynamic shared objects are mapped to the beginning of the virtual memory. For example: $ readelf -aW /lib/ld-linux.so.2 [...] Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000000 0x00000000 0x00000000 0x1ec58 0x1ec58 R E 0x1000 LOAD 0x01ec80 0x0001fc80 0x0001fc80 0x00bb8 0x00c78 RW 0x1000 [...] However, it appears that some versions of Fedora-20/i686 ship an ELF interpreter with a non-null base address: $ readelf -aW /lib/ld-linux.so.2 [...] Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000000 0x43acf000 0x43acf000 0x1ec58 0x1ec58 R E 0x1000 LOAD 0x01ec80 0x43aeec80 0x43aeec80 0x00bb8 0x00c78 RW 0x1000 [...] In such cases, PRoot should not add a base address to the load address, otherwise this ELF interpreter might get mapped to an unexpected location: proot info: translate("/" + "/lib/ld-linux.so.2") proot info: -> "/usr/lib/ld-2.18.so" proot info: sysenter end: open(0xbfa63970, 0x0, 0x0, 0xbfa63a18, 0x0, 0x3) = 0xffffffda [0xbfa63970, 0] proot info: sysexit start: open(0xbfa63970, 0x0, 0x0, 0xbfa63a18, 0x0, 0x3) = 0x3 [0xbfa63970, 0] proot info: sysexit end: open(0xbfa63a7a, 0x0, 0x0, 0xbfa63a18, 0x0, 0x3) = 0x3 [0xbfa63984, 0] proot info: sysenter start: mmap2(0xf2acf000, 0x1f000, 0x5, 0x12, 0x3, 0x0) = 0xffffffda [0xbfa63978, 0] proot info: sysenter end: mmap2(0xf2acf000, 0x1f000, 0x5, 0x12, 0x3, 0x0) = 0xffffffda [0xbfa63978, 0] proot info: sysexit start: mmap2(0xf2acf000, 0x1f000, 0x5, 0x12, 0x3, 0x0) = 0xfffffff4 [0xbfa63978, 0] proot info: sysexit end: mmap2(0xf2acf000, 0x1f000, 0x5, 0x12, 0x3, 0x0) = 0xfffffff4 [0xbfa63978, 0] proot info: sysenter start: exit(0xb6, 0x1f000, 0xb6, 0xbfa63a20, 0x1, 0x3) = 0xffffffda [0xbfa63984, 0] proot info: sysenter end: exit(0xb6, 0x1f000, 0xb6, 0xbfa63a20, 0x1, 0x3) = 0xffffffda [0xbfa63984, 0] proot info: exited with status 182 I verified that the Linux kernel behaves the same: else if (loc->elf_ex.e_type == ET_DYN) { #ifdef CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE if (current->flags & PF_RANDOMIZE) load_bias = 0; else load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr); #else load_bias = ELF_PAGESTART(ELF_ET_DYN_BASE - vaddr); #endif } Reported-by: Frank TEO <frank.teo@st.com>	Cédric VINCENT	9 years ago
739	Use "-sh" instead of "-" as the default command name, this i... Use "-sh" instead of "-" as the default command name, this is less confusing.	Cédric VINCENT	9 years ago
738	Prepare PRoot release v5.1.0. Prepare PRoot release v5.1.0.	Cédric VINCENT	9 years ago
737	Add initial support for ptrace ARCH_PRCTL request. Add initial support for ptrace ARCH_PRCTL request. This is required to debug multi-threaded programs with versions of GDB that are built against old kernel headers: PTRACE_ARCH_PRCTL is obsolete since [Linux] 2.6.25, where the fs_base and gs_base fields of user_regs_struct can be used directly. -- gdb/amd64-linux-nat.c Note: GDB uses only GET_{F,G}S requests, that's why SET_{F,G}S requests are not supported yet, I don't know how to test them anyway.	Cédric VINCENT	9 years ago
736	Add test for commit c47aeb7d "Fix ptrace emulation for multi... Add test for commit c47aeb7d "Fix ptrace emulation for multi-threaded programs"	Cédric VINCENT	9 years ago
735	Fix support to execute 32-bit programs from 64-bit programs. Fix support to execute 32-bit programs from 64-bit programs. As stated in the is_32on64_mode() function, 32-bit/64-bit mode change is effective immediately. This was effective for 64-bit -> 32-bit change, but not for the other way. Reported-by: Erwan GOURIOU <erwan.gouriou@st.com> & Sebastien GANDON <sebastien.gandon@st.com> Investigated-by: Yann Droneaud <yann@droneaud.fr> Ref.: https://github.com/cedric-vincent/PRoot/issues/73	Cédric VINCENT	9 years ago
734	Fix ptrace emulation for multi-threaded programs. Fix ptrace emulation for multi-threaded programs. Reported-by: Christian milkylainen@gmail.com Ref.: https://groups.google.com/forum/?fromgroups#!topic/proot_me/jZclZLc959Q Ref.: https://github.com/cedric-vincent/PRoot/issues/69	Cédric VINCENT	9 years ago
733	ptrace: Make terminating event deduplication new mechanism m... ptrace: Make terminating event deduplication new mechanism more generic. The previous commit broke this: while ./src/proot ./tests/rootfs/bin/test-ptrace00; do true; done	Cédric VINCENT	9 years ago
732	ptrace: Fix deduplication of WIFEXITED/WIFSIGNALED events ptrace: Fix deduplication of WIFEXITED/WIFSIGNALED events The Linux kernel reports the terminating event (WIFEXITED/WIFSIGNALED) issued by a process to both its parent and its tracer, except when they are the same. In this case the Linux kernel reports the terminating event only once to the tracing parent. Previously, PRoot tried to honor this behavior by reporting only the first terminating event (toward the tracer) and by hiding the second one (toward the parent). Sadly, this strategy leads to zombie processes since the child status is not collected by its parent from a kernel point-of-view. For instance, when using GDB against a simple program: $ proot gdb ./a.out [...] (gdb) break main [...] (gdb) run [...] Breakpoint 1, 0x000000000040062c in main () Then looking at the process hierarchy: - before: $ pstree -pa 8786 gdb,8786 ./a.out \|-a.out,8788 `-(a.out,8791) - now (it is just like without PRoot): $ pstree -pa 8786 gdb,8786 ./a.out `-a.out,8791 It works correcly because PRoot now hides the first terminating event (toward the tracer) and make the second one (toward the parent) appear by restarting the wait syscall if needed. Ref.: https://github.com/cedric-vincent/PRoot/issues/67	Cédric VINCENT	9 years ago
731	loader: Fix call to prctl(2); thou shalt not use functions a... loader: Fix call to prctl(2); thou shalt not use functions as macro parameters. When building the loader in -O0, the call site to basename() was placed inside the syscall arguments preparation sequence. As a consequence, all previously prepared argument registers were scratched. Thanks-to: Christophe MONAT <christophe.monat@st.com> for the hint.	Cédric VINCENT	9 years ago

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