diff options
Diffstat (limited to 'sysdeps/unix/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysdep.h | 140 |
1 files changed, 108 insertions, 32 deletions
diff --git a/sysdeps/unix/sysdep.h b/sysdeps/unix/sysdep.h index 1ba4de9..32bc855 100644 --- a/sysdeps/unix/sysdep.h +++ b/sysdeps/unix/sysdep.h @@ -24,6 +24,9 @@ #define SYSCALL__(name, args) PSEUDO (__##name, name, args) #define SYSCALL(name, args) PSEUDO (name, name, args) +#ifndef __ASSEMBLER__ +# include <errno.h> + #define __SYSCALL_CONCAT_X(a,b) a##b #define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X (a, b) @@ -108,42 +111,115 @@ #define INLINE_SYSCALL_CALL(...) \ __INLINE_SYSCALL_DISP (__INLINE_SYSCALL, __VA_ARGS__) +#define __INTERNAL_SYSCALL_NCS0(name) \ + INTERNAL_SYSCALL_NCS (name, 0) +#define __INTERNAL_SYSCALL_NCS1(name, a1) \ + INTERNAL_SYSCALL_NCS (name, 1, a1) +#define __INTERNAL_SYSCALL_NCS2(name, a1, a2) \ + INTERNAL_SYSCALL_NCS (name, 2, a1, a2) +#define __INTERNAL_SYSCALL_NCS3(name, a1, a2, a3) \ + INTERNAL_SYSCALL_NCS (name, 3, a1, a2, a3) +#define __INTERNAL_SYSCALL_NCS4(name, a1, a2, a3, a4) \ + INTERNAL_SYSCALL_NCS (name, 4, a1, a2, a3, a4) +#define __INTERNAL_SYSCALL_NCS5(name, a1, a2, a3, a4, a5) \ + INTERNAL_SYSCALL_NCS (name, 5, a1, a2, a3, a4, a5) +#define __INTERNAL_SYSCALL_NCS6(name, a1, a2, a3, a4, a5, a6) \ + INTERNAL_SYSCALL_NCS (name, 6, a1, a2, a3, a4, a5, a6) +#define __INTERNAL_SYSCALL_NCS7(name, a1, a2, a3, a4, a5, a6, a7) \ + INTERNAL_SYSCALL_NCS (name, 7, a1, a2, a3, a4, a5, a6, a7) + +/* Issue a syscall defined by syscall number plus any other argument required. + It is similar to INTERNAL_SYSCALL_NCS macro, but without the need to pass + the expected argument number as third parameter. */ +#define INTERNAL_SYSCALL_NCS_CALL(...) \ + __INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL_NCS, __VA_ARGS__) + +/* Cancellation macros. */ +#include <syscall_types.h> + +long int __internal_syscall_cancel (__syscall_arg_t a1, __syscall_arg_t a2, + __syscall_arg_t a3, __syscall_arg_t a4, + __syscall_arg_t a5, __syscall_arg_t a6, + __syscall_arg_t nr) attribute_hidden; + +long int __syscall_cancel (__syscall_arg_t nr, __syscall_arg_t arg1, + __syscall_arg_t arg2, __syscall_arg_t arg3, + __syscall_arg_t arg4, __syscall_arg_t arg5, + __syscall_arg_t arg6) attribute_hidden; + +#define __SYSCALL_CANCEL0(name) \ + __syscall_cancel (0, 0, 0, 0, 0, 0, __NR_##name) +#define __SYSCALL_CANCEL1(name, a1) \ + __syscall_cancel (__SSC (a1), 0, 0, 0, 0, 0, __NR_##name) +#define __SYSCALL_CANCEL2(name, a1, a2) \ + __syscall_cancel (__SSC (a1), __SSC (a2), 0, 0, 0, 0, __NR_##name) +#define __SYSCALL_CANCEL3(name, a1, a2, a3) \ + __syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), 0, 0, 0, \ + __NR_##name) +#define __SYSCALL_CANCEL4(name, a1, a2, a3, a4) \ + __syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), \ + __SSC(a4), 0, 0, __NR_##name) +#define __SYSCALL_CANCEL5(name, a1, a2, a3, a4, a5) \ + __syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), __SSC(a4), \ + __SSC (a5), 0, __NR_##name) +#define __SYSCALL_CANCEL6(name, a1, a2, a3, a4, a5, a6) \ + __syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), __SSC (a4), \ + __SSC (a5), __SSC (a6), __NR_##name) + +#define __SYSCALL_CANCEL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n +#define __SYSCALL_CANCEL_NARGS(...) \ + __SYSCALL_CANCEL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,) +#define __SYSCALL_CANCEL_CONCAT_X(a,b) a##b +#define __SYSCALL_CANCEL_CONCAT(a,b) __SYSCALL_CANCEL_CONCAT_X (a, b) +#define __SYSCALL_CANCEL_DISP(b,...) \ + __SYSCALL_CANCEL_CONCAT (b,__SYSCALL_CANCEL_NARGS(__VA_ARGS__))(__VA_ARGS__) + +/* Issue a cancellable syscall defined first argument plus any other argument + required. If and error occurs its value, the macro returns -1 and sets + errno accordingly. */ +#define __SYSCALL_CANCEL_CALL(...) \ + __SYSCALL_CANCEL_DISP (__SYSCALL_CANCEL, __VA_ARGS__) + +#define __INTERNAL_SYSCALL_CANCEL0(name) \ + __internal_syscall_cancel (0, 0, 0, 0, 0, 0, __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL1(name, a1) \ + __internal_syscall_cancel (__SSC (a1), 0, 0, 0, 0, 0, __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL2(name, a1, a2) \ + __internal_syscall_cancel (__SSC (a1), __SSC (a2), 0, 0, 0, 0, \ + __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL3(name, a1, a2, a3) \ + __internal_syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), 0, \ + 0, 0, __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL4(name, a1, a2, a3, a4) \ + __internal_syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), \ + __SSC(a4), 0, 0, __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL5(name, a1, a2, a3, a4, a5) \ + __internal_syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), \ + __SSC(a4), __SSC (a5), 0, __NR_##name) +#define __INTERNAL_SYSCALL_CANCEL6(name, a1, a2, a3, a4, a5, a6) \ + __internal_syscall_cancel (__SSC (a1), __SSC (a2), __SSC (a3), \ + __SSC (a4), __SSC (a5), __SSC (a6), \ + __NR_##name) + +/* Issue a cancellable syscall defined by syscall number NAME plus any other + argument required. If an error occurs its value is returned as an negative + number unmodified and errno is not set. */ +#define __INTERNAL_SYSCALL_CANCEL_CALL(...) \ + __SYSCALL_CANCEL_DISP (__INTERNAL_SYSCALL_CANCEL, __VA_ARGS__) + #if IS_IN (rtld) -/* All cancellation points are compiled out in the dynamic loader. */ -# define NO_SYSCALL_CANCEL_CHECKING 1 +/* The loader does not need to handle thread cancellation, use direct + syscall instead. */ +# define INTERNAL_SYSCALL_CANCEL(...) INTERNAL_SYSCALL_CALL(__VA_ARGS__) +# define SYSCALL_CANCEL(...) INLINE_SYSCALL_CALL (__VA_ARGS__) #else -# define NO_SYSCALL_CANCEL_CHECKING SINGLE_THREAD_P +# define INTERNAL_SYSCALL_CANCEL(...) \ + __INTERNAL_SYSCALL_CANCEL_CALL (__VA_ARGS__) +# define SYSCALL_CANCEL(...) \ + __SYSCALL_CANCEL_CALL (__VA_ARGS__) #endif -#define SYSCALL_CANCEL(...) \ - ({ \ - long int sc_ret; \ - if (NO_SYSCALL_CANCEL_CHECKING) \ - sc_ret = INLINE_SYSCALL_CALL (__VA_ARGS__); \ - else \ - { \ - int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \ - sc_ret = INLINE_SYSCALL_CALL (__VA_ARGS__); \ - LIBC_CANCEL_RESET (sc_cancel_oldtype); \ - } \ - sc_ret; \ - }) - -/* Issue a syscall defined by syscall number plus any other argument - required. Any error will be returned unmodified (including errno). */ -#define INTERNAL_SYSCALL_CANCEL(...) \ - ({ \ - long int sc_ret; \ - if (NO_SYSCALL_CANCEL_CHECKING) \ - sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \ - else \ - { \ - int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \ - sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \ - LIBC_CANCEL_RESET (sc_cancel_oldtype); \ - } \ - sc_ret; \ - }) +#endif /* __ASSEMBLER__ */ /* Machine-dependent sysdep.h files are expected to define the macro PSEUDO (function_name, syscall_name) to emit assembly code to define the |