diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/hppa')
| -rw-r--r-- | sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h | 235 |
1 files changed, 7 insertions, 228 deletions
diff --git a/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h b/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h index 8b7f2b2095..bf88ea56be 100644 --- a/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h +++ b/sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h @@ -17,221 +17,10 @@ #include <sysdep.h> #include <tls.h> -#ifndef __ASSEMBLER__ -# include <nptl/pthreadP.h> -#endif +#include <nptl/pthreadP.h> #if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt) -# ifndef NO_ERROR -# define NO_ERROR -0x1000 -# endif - -/* The syscall cancellation mechanism requires userspace - assistance, the following code does roughly this: - - do arguments (read arg5 and arg6 to registers) - setup frame - - check if there are threads, yes jump to pseudo_cancel - - unthreaded: - syscall - check syscall return (jump to pre_end) - set errno - set return to -1 - (jump to pre_end) - - pseudo_cancel: - cenable - syscall - cdisable - check syscall return (jump to pre_end) - set errno - set return to -1 - - pre_end - restore stack - - It is expected that 'ret' and 'END' macros will - append an 'undo arguments' and 'return' to the - this PSEUDO macro. */ - -# undef PSEUDO -# define PSEUDO(name, syscall_name, args) \ - ENTRY (__##syscall_name##_nocancel) \ - DOARGS_##args ASM_LINE_SEP \ - stwm TREG, 64(%sp) ASM_LINE_SEP \ - .cfi_def_cfa_offset -64 ASM_LINE_SEP \ - .cfi_offset TREG, 0 ASM_LINE_SEP \ - stw %sp, -4(%sp) ASM_LINE_SEP \ - stw %r19, -32(%sp) ASM_LINE_SEP \ - .cfi_offset 19, 32 ASM_LINE_SEP \ - /* Save r19 */ ASM_LINE_SEP \ - SAVE_PIC(TREG) ASM_LINE_SEP \ - /* Do syscall, delay loads # */ ASM_LINE_SEP \ - ble 0x100(%sr2,%r0) ASM_LINE_SEP \ - ldi SYS_ify (syscall_name), %r20 /* delay */ ASM_LINE_SEP \ - ldi NO_ERROR,%r1 ASM_LINE_SEP \ - cmpb,>>=,n %r1,%ret0,L(pre_nc_end) ASM_LINE_SEP \ - /* Restore r19 from TREG */ ASM_LINE_SEP \ - LOAD_PIC(TREG) /* delay */ ASM_LINE_SEP \ - SYSCALL_ERROR_HANDLER ASM_LINE_SEP \ - /* Use TREG for temp storage */ ASM_LINE_SEP \ - copy %ret0, TREG /* delay */ ASM_LINE_SEP \ - /* OPTIMIZE: Don't reload r19 */ ASM_LINE_SEP \ - /* do a -1*syscall_ret0 */ ASM_LINE_SEP \ - sub %r0, TREG, TREG ASM_LINE_SEP \ - /* Store into errno location */ ASM_LINE_SEP \ - stw TREG, 0(%sr0,%ret0) ASM_LINE_SEP \ - /* return -1 as error */ ASM_LINE_SEP \ - ldi -1, %ret0 ASM_LINE_SEP \ -L(pre_nc_end): ASM_LINE_SEP \ - /* No need to LOAD_PIC */ ASM_LINE_SEP \ - /* Undo frame */ ASM_LINE_SEP \ - ldwm -64(%sp),TREG ASM_LINE_SEP \ - /* Restore rp before exit */ ASM_LINE_SEP \ - ldw -20(%sp), %rp ASM_LINE_SEP \ - ret ASM_LINE_SEP \ - END(__##syscall_name##_nocancel) ASM_LINE_SEP \ - /**********************************************/ASM_LINE_SEP \ - ENTRY (name) \ - DOARGS_##args ASM_LINE_SEP \ - stwm TREG, 64(%sp) ASM_LINE_SEP \ - .cfi_def_cfa_offset -64 ASM_LINE_SEP \ - .cfi_offset TREG, 0 ASM_LINE_SEP \ - stw %sp, -4(%sp) ASM_LINE_SEP \ - stw %r19, -32(%sp) ASM_LINE_SEP \ - .cfi_offset 19, 32 ASM_LINE_SEP \ - /* Done setting up frame, continue... */ ASM_LINE_SEP \ - SINGLE_THREAD_P ASM_LINE_SEP \ - cmpib,<>,n 0,%ret0,L(pseudo_cancel) ASM_LINE_SEP \ -L(unthreaded): ASM_LINE_SEP \ - /* Save r19 */ ASM_LINE_SEP \ - SAVE_PIC(TREG) ASM_LINE_SEP \ - /* Do syscall, delay loads # */ ASM_LINE_SEP \ - ble 0x100(%sr2,%r0) ASM_LINE_SEP \ - ldi SYS_ify (syscall_name), %r20 /* delay */ ASM_LINE_SEP \ - ldi NO_ERROR,%r1 ASM_LINE_SEP \ - cmpb,>>=,n %r1,%ret0,L(pre_end) ASM_LINE_SEP \ - /* Restore r19 from TREG */ ASM_LINE_SEP \ - LOAD_PIC(TREG) /* delay */ ASM_LINE_SEP \ - SYSCALL_ERROR_HANDLER ASM_LINE_SEP \ - /* Use TREG for temp storage */ ASM_LINE_SEP \ - copy %ret0, TREG /* delay */ ASM_LINE_SEP \ - /* OPTIMIZE: Don't reload r19 */ ASM_LINE_SEP \ - /* do a -1*syscall_ret0 */ ASM_LINE_SEP \ - sub %r0, TREG, TREG ASM_LINE_SEP \ - /* Store into errno location */ ASM_LINE_SEP \ - stw TREG, 0(%sr0,%ret0) ASM_LINE_SEP \ - b L(pre_end) ASM_LINE_SEP \ - /* return -1 as error */ ASM_LINE_SEP \ - ldi -1, %ret0 /* delay */ ASM_LINE_SEP \ -L(pseudo_cancel): ASM_LINE_SEP \ - PUSHARGS_##args /* Save args */ ASM_LINE_SEP \ - /* Save r19 into TREG */ ASM_LINE_SEP \ - CENABLE /* FUNC CALL */ ASM_LINE_SEP \ - SAVE_PIC(TREG) /* delay */ ASM_LINE_SEP \ - /* restore syscall args */ ASM_LINE_SEP \ - POPARGS_##args ASM_LINE_SEP \ - /* save mask from cenable (use stub rp slot) */ ASM_LINE_SEP \ - stw %ret0, -24(%sp) ASM_LINE_SEP \ - /* ... SYSCALL ... */ ASM_LINE_SEP \ - ble 0x100(%sr2,%r0) ASM_LINE_SEP \ - ldi SYS_ify (syscall_name), %r20 /* delay */ ASM_LINE_SEP \ - /* ............... */ ASM_LINE_SEP \ - LOAD_PIC(TREG) ASM_LINE_SEP \ - /* pass mask as arg0 to cdisable */ ASM_LINE_SEP \ - ldw -24(%sp), %r26 ASM_LINE_SEP \ - CDISABLE ASM_LINE_SEP \ - stw %ret0, -24(%sp) /* delay */ ASM_LINE_SEP \ - /* Restore syscall return */ ASM_LINE_SEP \ - ldw -24(%sp), %ret0 ASM_LINE_SEP \ - /* compare error */ ASM_LINE_SEP \ - ldi NO_ERROR,%r1 ASM_LINE_SEP \ - /* branch if no error */ ASM_LINE_SEP \ - cmpb,>>=,n %r1,%ret0,L(pre_end) ASM_LINE_SEP \ - LOAD_PIC(TREG) /* cond. nullify */ ASM_LINE_SEP \ - copy %ret0, TREG /* save syscall return */ ASM_LINE_SEP \ - SYSCALL_ERROR_HANDLER ASM_LINE_SEP \ - /* make syscall res value positive */ ASM_LINE_SEP \ - sub %r0, TREG, TREG /* delay */ ASM_LINE_SEP \ - /* No need to LOAD_PIC */ ASM_LINE_SEP \ - /* store into errno location */ ASM_LINE_SEP \ - stw TREG, 0(%sr0,%ret0) ASM_LINE_SEP \ - /* return -1 */ ASM_LINE_SEP \ - ldi -1, %ret0 ASM_LINE_SEP \ -L(pre_end): ASM_LINE_SEP \ - /* No need to LOAD_PIC */ ASM_LINE_SEP \ - /* Undo frame */ ASM_LINE_SEP \ - ldwm -64(%sp),TREG ASM_LINE_SEP \ - /* Restore rp before exit */ ASM_LINE_SEP \ - ldw -20(%sp), %rp ASM_LINE_SEP - -/* Save arguments into our frame */ -# define PUSHARGS_0 /* nothing to do */ -# define PUSHARGS_1 PUSHARGS_0 stw %r26, -36(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 26, 28 ASM_LINE_SEP -# define PUSHARGS_2 PUSHARGS_1 stw %r25, -40(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 25, 24 ASM_LINE_SEP -# define PUSHARGS_3 PUSHARGS_2 stw %r24, -44(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 24, 20 ASM_LINE_SEP -# define PUSHARGS_4 PUSHARGS_3 stw %r23, -48(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 23, 16 ASM_LINE_SEP -# define PUSHARGS_5 PUSHARGS_4 stw %r22, -52(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 22, 12 ASM_LINE_SEP -# define PUSHARGS_6 PUSHARGS_5 stw %r21, -56(%sr0,%sp) ASM_LINE_SEP \ - .cfi_offset 21, 8 ASM_LINE_SEP - -/* Bring them back from the stack */ -# define POPARGS_0 /* nothing to do */ -# define POPARGS_1 POPARGS_0 ldw -36(%sr0,%sp), %r26 ASM_LINE_SEP -# define POPARGS_2 POPARGS_1 ldw -40(%sr0,%sp), %r25 ASM_LINE_SEP -# define POPARGS_3 POPARGS_2 ldw -44(%sr0,%sp), %r24 ASM_LINE_SEP -# define POPARGS_4 POPARGS_3 ldw -48(%sr0,%sp), %r23 ASM_LINE_SEP -# define POPARGS_5 POPARGS_4 ldw -52(%sr0,%sp), %r22 ASM_LINE_SEP -# define POPARGS_6 POPARGS_5 ldw -56(%sr0,%sp), %r21 ASM_LINE_SEP - -# if IS_IN (libpthread) -# ifdef PIC -# define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \ - bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \ - bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP -# else -# define CENABLE .import __pthread_enable_asynccancel,code ASM_LINE_SEP \ - bl __pthread_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __pthread_disable_asynccancel,code ASM_LINE_SEP \ - bl __pthread_disable_asynccancel,%r2 ASM_LINE_SEP -# endif -# elif IS_IN (libc) -# ifdef PIC -# define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \ - bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __libc_disable_asynccancel,code ASM_LINE_SEP \ - bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP -# else -# define CENABLE .import __libc_enable_asynccancel,code ASM_LINE_SEP \ - bl __libc_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __libc_disable_asynccancel,code ASM_LINE_SEP \ - bl __libc_disable_asynccancel,%r2 ASM_LINE_SEP -# endif -# elif IS_IN (librt) -# ifdef PIC -# define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \ - bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \ - bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP -# else -# define CENABLE .import __librt_enable_asynccancel,code ASM_LINE_SEP \ - bl __librt_enable_asynccancel,%r2 ASM_LINE_SEP -# define CDISABLE .import __librt_disable_asynccancel,code ASM_LINE_SEP \ - bl __librt_disable_asynccancel,%r2 ASM_LINE_SEP -# endif -# else -# error Unsupported library -# endif - # if IS_IN (libpthread) # define __local_multiple_threads __pthread_multiple_threads # elif IS_IN (libc) @@ -242,17 +31,10 @@ L(pre_end): ASM_LINE_SEP \ # error Unsupported library # endif -# ifndef __ASSEMBLER__ -# define SINGLE_THREAD_P \ - __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ - header.multiple_threads) == 0, 1) -# else -/* Read the value of header.multiple_threads from the thread pointer */ -# define SINGLE_THREAD_P \ - mfctl %cr27, %ret0 ASM_LINE_SEP \ - ldw MULTIPLE_THREADS_THREAD_OFFSET(%sr0,%ret0),%ret0 ASM_LINE_SEP -# endif -#elif !defined __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0) + +#else /* This code should never be used but we define it anyhow. */ # define SINGLE_THREAD_P (1) @@ -261,8 +43,5 @@ L(pre_end): ASM_LINE_SEP \ #endif /* IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt) */ -#ifndef __ASSEMBLER__ -# define RTLD_SINGLE_THREAD_P \ - __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ - header.multiple_threads) == 0, 1) -#endif +#define RTLD_SINGLE_THREAD_P \ + __glibc_likely (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0) |