vDSOs (virtual dynamically linked shared objects)<\/a> Sysenter Based System Call Mechanism in Linux 2.6<\/a> Comparison of command shells<\/a><\/p>\n Linux kernel interfaces<\/a> Linux System Calls Overview<\/a> Adding Syscalls To FreeBSD<\/a> The arguments of sys_sigreturn<\/a> ==================================================<\/p>\n Wikipedia: INT (x86 instruction)<\/a><\/p>\n List of ARM microarchitectures<\/a><\/p>\n Thumb software interrupt and breakpoint instructions > Software interrupt (SWI)<\/a> vsyscall \/ vDSO vDSOs (virtual dynamically linked shared objects) What are vdso and vsyscall? Creating a vDSO: the Colonel’s Other Chicken On vsyscalls and the vDSO Linux syscall, vsyscall, and vDSO… Oh My! What is linux-gate.so.1? Sysenter Based System Call Mechanism in Linux 2.6 How to invoke a system call via sysenter in inline assembly […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4094","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/4094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4094"}],"version-history":[{"count":14,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/4094\/revisions"}],"predecessor-version":[{"id":4151,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=\/wp\/v2\/posts\/4094\/revisions\/4151"}],"wp:attachment":[{"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.bachi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nWhat are vdso and vsyscall?<\/a>
\nCreating a vDSO: the Colonel’s Other Chicken<\/a>
\nOn vsyscalls and the vDSO<\/a>
\nLinux syscall, vsyscall, and vDSO… Oh My!<\/a>
\nWhat is linux-gate.so.1?<\/a><\/p>\n
\nHow to invoke a system call via sysenter in inline assembly (x86\/amd64 linux)?<\/a>
\nIntel x86 vs x64 system call<\/a>
\nCall gate<\/a>
\nSystem Calls<\/a>
\nSysenter<\/a>
\nDebugging in AMD64 64-bit Mode in Theory<\/a><\/p>\nLinux<\/h3>\n
\nThe Linux Programming Interface<\/a>
\nSystem call<\/a>
\nwait (system call)<\/a>
\nread (system call)<\/a><\/p>\n
\nWhere is the system call table in linux kernel v3.9?<\/a>
\nWhere is the system call table in linux kernel v3.9?<\/a>
\nAdding a System call for Linux 3.10 x86_64<\/a>
\nARM Kernel-provided User Helpers<\/a>
\nAdd new system call to linux kernel\u2026<\/a>
\nLinux Syscall Reference for Kernel 2.6<\/a>
\nList of Linux\/i386 system calls for Kernel 2.6<\/a>
\nman syscalls – Linux system calls<\/a><\/p>\nFreeBSD<\/h3>\n
\nruntime: reconsider using SYSCALL instruction on FreeBSD<\/a>
\nReading the FreeBSD Kernel<\/a>
\nint80h.org<\/a><\/p>\n\r\ngrep -r sysenter .\r\ngrep -r sysexit .\r\ngrep -r db_inst_0f0x .\r\ngrep -r db_inst_0f .\r\ngrep -r "int 0x80" .\r\ngrep -r "syscall" .\r\ngrep -r "sys\/syscall.h" .\r\ngrep -r "sy_call" .\r\ngrep -r sigtramp.S .\r\ngrep -r "NON_GPROF_ENTRY(sigcode)" .\r\ngrep -r "sigcode" .\r\ngrep -r SYS_sigreturn .\r\n<\/pre>\n
\r\n#include <sys\/syscall.h>\r\n\r\n.\/powerpc\/booke\/vm_machdep.c\r\n.\/powerpc\/booke\/trap.c:\r\n\r\n.\/i386\/i386\/trap.c\r\n.\/i386\/i386\/elf_machdep.c\r\n.\/i386\/i386\/locore.s\r\n.\/i386\/xen\/locore.s\r\n\r\n.\/arm\/arm\/sys_machdep.c\r\n.\/arm\/arm\/vm_machdep.c\r\n.\/arm\/arm\/trap.c\r\n.\/arm\/arm\/locore.S\r\n.\/arm\/arm\/elf_machdep.c\r\n\r\n.\/amd64\/amd64\/trap.c\r\n.\/amd64\/amd64\/elf_machdep.c\r\n.\/amd64\/ia32\/ia32_signal.c\r\n.\/amd64\/ia32\/ia32_sigtramp.S\r\n.\/amd64\/ia32\/ia32_reg.c\r\n.\/amd64\/ia32\/ia32_syscall.c\r\n\r\nSYS_syscall \r\n \r\ncpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa)\r\n\r\n\/*\r\n * System call handler for native binaries. The trap frame is already\r\n * set up by the assembler trampoline and a pointer to it is saved in\r\n * td_frame.\r\n *\/\r\nvoid\r\namd64_syscall(struct thread *td, int traced)\r\n{\r\n [...]\r\n}\r\n\r\n.\/kern\/subr_syscall.c:syscallenter(struct thread *td, struct syscall_args *sa)\r\n\r\nstatic inline int\r\nsyscallenter(struct thread *td, struct syscall_args *sa)\r\n{\r\n struct proc *p;\r\n int error, traced;\r\n\r\n PCPU_INC(cnt.v_syscall);\r\n p = td->td_proc;\r\n \r\n error = (p->p_sysent->sv_fetch_syscall_args)(td, sa);\r\n\r\n\r\n error = syscall_thread_enter(td, sa->callp);\r\n\r\n AUDIT_SYSCALL_ENTER(sa->code, td);\r\n error = (sa->callp->sy_call)(td, sa->args);\r\n AUDIT_SYSCALL_EXIT(error, td);\r\n\r\n syscall_thread_exit(td, sa->callp);\r\n}\r\n\r\n.\/amd64\/amd64\/db_trace.c: sy_call_t *f;\r\n.\/amd64\/amd64\/db_trace.c: f = p->p_sysent->sv_table[number].sy_call;\r\n\r\n<\/pre>\nARM<\/h4>\n
\nsvn commit: r245414 – head\/sys\/arm\/arm\/locore.S<\/a><\/p>\ni386<\/h3>\n
ARM<\/h3>\n
\n
\nDeveloping software for Cortex-M3 > Supervisor Calls (SVC)<\/a> => formerly SWI
\n ARM and Thumb Instructions > Hypervisor Call (HVC)<\/a> (Virtualization Extensions)
\nSWI : SoftWare Interrupt<\/a>
\nKeil: SWI Functions<\/a>, run in Supervisor Mode of ARM7 and ARM9, interrupt protected
\nKeil: SVC Functions<\/a>, run in Privileged Handler Mode of the Cortex-M core
\nAre ARM instructuons SWI and SVC exactly same thing?<\/a>
\nHow to use the SWI in ARM Cortex A9 for enabling the IRQ interrupt?<\/a>
\nWhich Cortex-M3 interrupts can I use for general purpose work?<\/a>
\nEffective Use of ARM Cortex-M3 SVCall<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"