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linux-user: Add strace support for printing arguments of chown()/lchown()
This patch implements strace argument printing functionality for syscalls: *chown, lchown - change ownership of a file int chown(const char *pathname, uid_t owner, gid_t group) int lchown(const char *pathname, uid_t owner, gid_t group) man page: https://www.man7.org/linux/man-pages/man2/lchown.2.html Implementation notes: Both syscalls use strings as arguments and thus a separate printing function was stated in "strace.list" for them. Both syscalls share the same number and types of arguments and thus share a same definition in file "syscall.c". This defintion uses existing functions "print_string()" to print the string argument and "print_raw_param()" to print other two arguments that are of basic types. Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200619123331.17387-6-filip.bozuta@syrmia.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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@ -1452,6 +1452,21 @@ print_chmod(const struct syscallname *name,
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}
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#endif
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#if defined(TARGET_NR_chown) || defined(TARGET_NR_lchown)
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static void
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print_chown(const struct syscallname *name,
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abi_long arg0, abi_long arg1, abi_long arg2,
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abi_long arg3, abi_long arg4, abi_long arg5)
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{
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print_syscall_prologue(name);
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print_string(arg0, 0);
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print_raw_param("%d", arg1, 0);
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print_raw_param("%d", arg2, 1);
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print_syscall_epilogue(name);
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}
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#define print_lchown print_chown
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#endif
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#ifdef TARGET_NR_clock_adjtime
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static void
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print_clock_adjtime(const struct syscallname *name,
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@ -71,7 +71,7 @@
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{ TARGET_NR_chmod, "chmod" , NULL, print_chmod, NULL },
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#endif
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#ifdef TARGET_NR_chown
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{ TARGET_NR_chown, "chown" , NULL, NULL, NULL },
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{ TARGET_NR_chown, "chown" , NULL, print_chown, NULL },
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#endif
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#ifdef TARGET_NR_chown32
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{ TARGET_NR_chown32, "chown32" , NULL, NULL, NULL },
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@ -475,7 +475,7 @@
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{ TARGET_NR_kill, "kill", NULL, print_kill, NULL },
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#endif
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#ifdef TARGET_NR_lchown
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{ TARGET_NR_lchown, "lchown" , NULL, NULL, NULL },
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{ TARGET_NR_lchown, "lchown" , NULL, print_lchown, NULL },
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#endif
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#ifdef TARGET_NR_lchown32
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{ TARGET_NR_lchown32, "lchown32" , NULL, NULL, NULL },
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