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< / a > < h2 class = "location" > < a href = "#" > Module syscall< / a > < / h2 > < div class = "sidebar-elems" > < section > < div class = "block" > < ul > < li > < a href = "#modules" > Modules< / a > < / li > < li > < a href = "#constants" > Constants< / a > < / li > < li > < a href = "#functions" > Functions< / a > < / li > < / ul > < / div > < / section > < div id = "sidebar-vars" data-name = "syscall" data-ty = "mod" data-relpath = "./" > < / div > < script defer src = "./sidebar-items.js" > < / script > < / div > < / nav > < main > < div class = "width-limiter" > < div class = "sub-container" > < a class = "sub-logo-container" href = "../../os/index.html" > < img class = "rust-logo" src = "../../rust-logo.svg" alt = "logo" > < / a > < nav class = "sub" > < div class = "theme-picker hidden" > < button id = "theme-picker" aria-label = "Pick another theme!" aria-haspopup = "menu" title = "themes" > < img width = "22" height = "22" alt = "Pick another theme!" src = "../../brush.svg" > < / button > < div id = "theme-choices" role = "menu" > < / div > < / div > < form class = "search-form" > < div class = "search-container" > < span > < / span > < input class = "search-input" name = "search" autocomplete = "off" spellcheck = "false" placeholder = "Click or press ‘ ’ ‘ ’ type = "search" > < button type = "button" id = "help-button" title = "help" > ?< / button > < a id = "settings-menu" href = "../../settings.html" title = "settings" > < img width = "22" height = "22" alt = "Change settings" src = "../../wheel.svg" > < / a > < / div > < / form > < / nav > < / div > < section id = "main-content" class = "content" > < div class = "main-heading" >
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< h1 class = "fqn" > < span class = "in-band" > Module < a href = "../index.html" > os< / a > ::< wbr > < a class = "mod" href = "#" > syscall< / a > < button id = "copy-path" onclick = "copy_path(this)" title = "Copy item path to clipboard" > < img src = "../../clipboard.svg" width = "19" height = "18" alt = "Copy item path" > < / button > < / span > < / h1 > < span class = "out-of-band" > < a class = "srclink" href = "../../src/os/syscall/mod.rs.html#1-41" > source< / a > · < a id = "toggle-all-docs" href = "javascript:void(0)" title = "collapse all docs" > [< span class = "inner" > − < / span > ]< / a > < / span > < / div > < details class = "rustdoc-toggle top-doc" open > < summary class = "hideme" > < span > Expand description< / span > < / summary > < div class = "docblock" > < p > Implementation of syscalls< / p >
< p > The single entry point to all system calls, < a href = "fn.syscall.html" title = "syscall()" > < code > syscall()< / code > < / a > , is called
whenever userspace wishes to perform a system call using the < code > ecall< / code >
instruction. In this case, the processor raises an ‘
U-mode’
< a href = "../trap/fn.trap_handler.html" title = "crate::trap::trap_handler" > < code > crate::trap::trap_handler< / code > < / a > .< / p >
< p > For clarity, each single syscall is implemented as its own function, named
< code > sys_< / code > then the name of the syscall. You can find functions like this in
submodules, and you should also implement syscalls this way.< / p >
< / div > < / details > < h2 id = "modules" class = "small-section-header" > < a href = "#modules" > Modules< / a > < / h2 >
< div class = "item-table" > < div class = "item-row" > < div class = "item-left module-item" > < a class = "mod" href = "fs/index.html" title = "os::syscall::fs mod" > fs< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < p > File and filesystem-related syscalls< / p >
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< div class = "item-table" > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_EXEC.html" title = "os::syscall::SYSCALL_EXEC constant" > SYSCALL_EXEC< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_EXIT.html" title = "os::syscall::SYSCALL_EXIT constant" > SYSCALL_EXIT< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_FORK.html" title = "os::syscall::SYSCALL_FORK constant" > SYSCALL_FORK< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_GETPID.html" title = "os::syscall::SYSCALL_GETPID constant" > SYSCALL_GETPID< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_GET_TIME.html" title = "os::syscall::SYSCALL_GET_TIME constant" > SYSCALL_GET_TIME< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_READ.html" title = "os::syscall::SYSCALL_READ constant" > SYSCALL_READ< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_WAITPID.html" title = "os::syscall::SYSCALL_WAITPID constant" > SYSCALL_WAITPID< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_WRITE.html" title = "os::syscall::SYSCALL_WRITE constant" > SYSCALL_WRITE< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < div class = "item-row" > < div class = "item-left module-item" > < a class = "constant" href = "constant.SYSCALL_YIELD.html" title = "os::syscall::SYSCALL_YIELD constant" > SYSCALL_YIELD< / a > < span title = "Restricted Visibility" > 🔒< / span > < / div > < div class = "item-right docblock-short" > < / div > < / div > < / div > < h2 id = "functions" class = "small-section-header" > < a href = "#functions" > Functions< / a > < / h2 >
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< div class = "item-table" > < div class = "item-row" > < div class = "item-left module-item" > < a class = "fn" href = "fn.syscall.html" title = "os::syscall::syscall fn" > syscall< / a > < / div > < div class = "item-right docblock-short" > < p > handle syscall exception with < code > syscall_id< / code > and other arguments< / p >
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