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Tidy up a few things with syscall generation:
- Instead of using a syscall slot (370) just to get a function prototype for lkmressys(), add an explicit function prototype to <sys/sysent.h>. This also removes unused special case checks for 'lkmressys' from makesyscalls.sh. - Instead of having magic logic in makesyscalls.sh to only generate a function prototype the first time 'lkmnosys' is seen, make 'NODEF' always not generate a function prototype and include an explicit prototype for 'lkmnosys' in <sys/sysent.h>. - As a result of the fix in (2), update the LKM syscall entries in the freebsd32 syscall table to use 'lkmnosys' rather than 'nosys'. - Use NOPROTO for the __syscall() entry (198) in the native ABI. This avoids the need for magic logic in makesyscalls.h to only generate a function prototype the first time 'nosys' is encountered.
This commit is contained in:
John Baldwin
parent
93d4804b62
commit
48a43ae819
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=183361
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@ -33,7 +33,7 @@
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; so the SYSCALL_MODULE macro works
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; NOARGS same as STD except do not create structure in sys/sysproto.h
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; NODEF same as STD except only have the entry in the syscall table
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; added. Meaning - do do not create structure or function
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; added. Meaning - do not create structure or function
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; prototype in sys/sysproto.h
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; NOPROTO same as STD except do not create structure or
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; function prototype in sys/sysproto.h. Does add a
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@ -388,16 +388,16 @@
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;
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; The following are reserved for loadable syscalls
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;
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210 AUE_NULL UNIMPL
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211 AUE_NULL UNIMPL
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212 AUE_NULL UNIMPL
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213 AUE_NULL UNIMPL
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214 AUE_NULL UNIMPL
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215 AUE_NULL UNIMPL
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216 AUE_NULL UNIMPL
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217 AUE_NULL UNIMPL
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218 AUE_NULL UNIMPL
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219 AUE_NULL UNIMPL
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210 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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211 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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212 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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213 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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214 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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215 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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216 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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217 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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218 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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219 AUE_NULL NODEF lkmnosys lkmnosys nosys_args int
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;
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; The following were introduced with NetBSD/4.4Lite-2
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@ -637,7 +637,7 @@
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367 AUE_NULL UNIMPL __cap_get_file
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368 AUE_NULL UNIMPL __cap_set_fd
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369 AUE_NULL UNIMPL __cap_set_file
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370 AUE_NULL UNIMPL lkmressys
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370 AUE_NULL UNIMPL nosys
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371 AUE_EXTATTR_SET_FD NOPROTO { int extattr_set_fd(int fd, \
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int attrnamespace, const char *attrname, \
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void *data, size_t nbytes); }
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@ -345,37 +345,27 @@ s/\$//g
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}
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printf("\t\t*n_args = %d;\n\t\tbreak;\n\t}\n", argc) > systrace
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printf("\t\tbreak;\n") > systracetmp
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if ((!nosys || funcname != "nosys") && \
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(funcname != "lkmnosys") && (funcname != "lkmressys")) {
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if (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO") {
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printf("struct %s {\n", argalias) > sysarg
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for (i = 1; i <= argc; i++)
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printf("\tchar %s_l_[PADL_(%s)]; " \
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"%s %s; char %s_r_[PADR_(%s)];\n",
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argname[i], argtype[i],
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argtype[i], argname[i],
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argname[i], argtype[i]) > sysarg
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printf("};\n") > sysarg
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}
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else if ($3 != "NOARGS" && $3 != "NOPROTO" && \
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$3 != "NODEF")
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printf("struct %s {\n\tregister_t dummy;\n};\n",
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argalias) > sysarg
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if (argc != 0 && $3 != "NOARGS" && $3 != "NOPROTO" && \
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$3 != "NODEF") {
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printf("struct %s {\n", argalias) > sysarg
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for (i = 1; i <= argc; i++)
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printf("\tchar %s_l_[PADL_(%s)]; " \
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"%s %s; char %s_r_[PADR_(%s)];\n",
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argname[i], argtype[i],
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argtype[i], argname[i],
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argname[i], argtype[i]) > sysarg
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printf("};\n") > sysarg
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}
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if (($3 != "NOPROTO" && $3 != "NODEF" && \
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(funcname != "nosys" || !nosys)) || \
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(funcname == "lkmnosys" && !lkmnosys) || \
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funcname == "lkmressys") {
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else if ($3 != "NOARGS" && $3 != "NOPROTO" && $3 != "NODEF")
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printf("struct %s {\n\tregister_t dummy;\n};\n",
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argalias) > sysarg
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if ($3 != "NOPROTO" && $3 != "NODEF") {
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printf("%s\t%s(struct thread *, struct %s *)",
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rettype, funcname, argalias) > sysdcl
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printf(";\n") > sysdcl
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printf("#define\t%sAUE_%s\t%s\n", syscallprefix,
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funcalias, auditev) > sysaue
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}
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if (funcname == "nosys")
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nosys = 1
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if (funcname == "lkmnosys")
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lkmnosys = 1
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printf("\t{ %s, (sy_call_t *)", argssize) > sysent
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column = 8 + 2 + length(argssize) + 15
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if ($3 == "NOIMPL") {
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@ -32,7 +32,7 @@
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; so the SYSCALL_MODULE macro works
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; NOARGS same as STD except do not create structure in sys/sysproto.h
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; NODEF same as STD except only have the entry in the syscall table
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; added. Meaning - do do not create structure or function
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; added. Meaning - do not create structure or function
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; prototype in sys/sysproto.h
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; NOPROTO same as STD except do not create structure or
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; function prototype in sys/sysproto.h. Does add a
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@ -380,7 +380,7 @@
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197 AUE_MMAP STD { caddr_t freebsd6_mmap(caddr_t addr, \
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size_t len, int prot, int flags, int fd, \
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int pad, off_t pos); }
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198 AUE_NULL STD { int nosys(void); } __syscall \
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198 AUE_NULL NOPROTO { int nosys(void); } __syscall \
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__syscall_args int
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199 AUE_LSEEK STD { off_t freebsd6_lseek(int fd, int pad, \
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off_t offset, int whence); }
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@ -657,7 +657,7 @@
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367 AUE_NULL UNIMPL __cap_get_file
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368 AUE_NULL UNIMPL __cap_set_fd
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369 AUE_NULL UNIMPL __cap_set_file
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370 AUE_NULL NODEF lkmressys lkmressys nosys_args int
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370 AUE_NULL UNIMPL nosys
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371 AUE_EXTATTR_SET_FD STD { int extattr_set_fd(int fd, \
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int attrnamespace, const char *attrname, \
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void *data, size_t nbytes); }
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@ -156,6 +156,12 @@ int syscall_register(int *offset, struct sysent *new_sysent,
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int syscall_deregister(int *offset, struct sysent *old_sysent);
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int syscall_module_handler(struct module *mod, int what, void *arg);
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/* Special purpose system call functions. */
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struct nosys_args;
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int lkmnosys(struct thread *, struct nosys_args *);
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int lkmressys(struct thread *, struct nosys_args *);
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#endif /* _KERNEL */
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#endif /* !_SYS_SYSENT_H_ */
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