diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h | 288 |
1 files changed, 261 insertions, 27 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h b/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h index d60dcd33d5..8142455781 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h +++ b/nptl/sysdeps/unix/sysv/linux/i386/sysdep-cancel.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2002. @@ -29,6 +29,7 @@ # define PSEUDO(name, syscall_name, args) \ .text; \ ENTRY (name) \ + L(name##START): \ cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \ jne L(pseudo_cancel); \ .type __##syscall_name##_nocancel,@function; \ @@ -50,11 +51,258 @@ POPSTATE_##args \ cmpl $-4095, %eax; \ jae SYSCALL_ERROR_LABEL; \ - L(pseudo_end): + L(pseudo_end): \ + \ + /* Create unwinding information for the syscall wrapper. */ \ + .section .eh_frame,"a",@progbits; \ + L(STARTFRAME): \ + /* Length of the CIE. */ \ + .long L(ENDCIE)-L(STARTCIE); \ + L(STARTCIE): \ + /* CIE ID. */ \ + .long 0; \ + /* Version number. */ \ + .byte 1; \ + /* NUL-terminated augmentation string. */ \ + AUGMENTATION_STRING; \ + /* Code alignment factor. */ \ + .uleb128 1; \ + /* Data alignment factor. */ \ + .sleb128 -4; \ + /* Return address register column. */ \ + .byte 8; \ + /* Optional augmentation parameter. */ \ + AUGMENTATION_PARAM \ + /* Start of the table initialization. */ \ + .byte 0xc; /* DW_CFA_def_cfa */ \ + .uleb128 4; \ + .uleb128 4; \ + .byte 0x88; /* DW_CFA_offset, column 0x8 */ \ + .uleb128 1; \ + .align 4; \ + L(ENDCIE): \ + /* Length of the FDE. */ \ + .long L(ENDFDE)-L(STARTFDE); \ + L(STARTFDE): \ + /* CIE pointer. */ \ + .long L(STARTFDE)-L(STARTFRAME); \ + /* Start address of the code. */ \ + START_SYMBOL_REF (name); \ + /* Length of the code. */ \ + .long L(name##END)-L(name##START); \ + /* Augmentation data. */ \ + AUGMENTATION_PARAM_FDE \ + /* The rest of the code depends on the number of parameters the syscall \ + takes. */ \ + EH_FRAME_##args(name); \ + .align 4; \ + L(ENDFDE): \ + .previous + +# ifdef SHARED +/* NUL-terminated augmentation string. Note "z" means there is an + augmentation value later on. */ +# define AUGMENTATION_STRING .string "zR" +# define AUGMENTATION_PARAM \ + /* Augmentation value length. */ \ + .uleb128 1; \ + /* Encoding: DW_EH_PE_pcrel + DW_EH_PE_sdata4. */ \ + .byte 0x1b; +# define AUGMENTATION_PARAM_FDE \ + /* No augmentation data. */ \ + .uleb128 0; +# define START_SYMBOL_REF(name) \ + /* PC-relative start address of the code. */ \ + .long L(name##START)-. +# else +/* No augmentation. */ +# define AUGMENTATION_STRING .ascii "\0" +# define AUGMENTATION_PARAM /* nothing */ +# define AUGMENTATION_PARAM_FDE /* nothing */ +# define START_SYMBOL_REF(name) \ + /* Absolute start address of the code. */ \ + .long L(name##START) +# endif + +/* Callframe description for syscalls without parameters. This is very + simple. The only place the stack pointer is changed is when the old + cancellation state value is saved. */ +# define EH_FRAME_0(name) \ + .byte 0x40+L(PUSHSTATE)-L(name##START); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x40+L(POPSTATE)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4 + +/* For syscalls with one and two parameters the code is the same as for + those which take no parameter. */ +# define EH_FRAME_1(name) \ + .byte 0x40+L(SAVEBX1)-L(name##START); /* DW_CFA_advance_loc+N */ \ + .byte 9; /* DW_CFA_register */ \ + .uleb128 3; /* %ebx */ \ + .uleb128 2; /* %edx */ \ + .byte 0x40+L(RESTBX1)-L(SAVEBX1); /* DW_CFA_advance_loc+N */ \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(PUSHSTATE)-L(RESTBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x40+L(SAVEBX2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \ + .byte 9; /* DW_CFA_register */ \ + .uleb128 3; /* %ebx */ \ + .uleb128 2; /* %edx */ \ + .byte 0x40+L(RESTBX2)-L(SAVEBX2); /* DW_CFA_advance_loc+N */ \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSTATE)-L(RESTBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4 + +# define EH_FRAME_2(name) EH_FRAME_1 (name) + +/* For syscalls with three parameters the stack pointer is changed + also to save the content of the %ebx register. */ +# define EH_FRAME_3(name) \ + .byte 0x40+L(PUSHBX1)-L(name##START); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 2; \ + .byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(PUSHSTATE)-L(POPBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x40+L(PUSHBX2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 3; \ + .byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSTATE)-L(POPBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4 + +/* With four parameters the syscall wrappers have to save %ebx and %esi. */ +# define EH_FRAME_4(name) \ + .byte 0x40+L(PUSHSI1)-L(name##START); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x86; /* DW_CFA_offset %esi */ \ + .uleb128 2; \ + .byte 0x40+L(PUSHBX1)-L(PUSHSI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 3; \ + .byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSI1)-L(POPBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4; \ + .byte 0xc6; /* DW_CFA_restore %esi */ \ + .byte 0x40+L(PUSHSTATE)-L(POPSI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x40+L(PUSHSI2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0x86; /* DW_CFA_offset %esi */ \ + .uleb128 3; \ + .byte 0x40+L(PUSHBX2)-L(PUSHSI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 16; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 4; \ + .byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSI2)-L(POPBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0xc6; /* DW_CFA_restore %esi */ \ + .byte 0x40+L(POPSTATE)-L(POPSI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4 + +/* With five parameters the syscall wrappers have to save %ebx, %esi, + and %edi. */ +# define EH_FRAME_5(name) \ + .byte 0x40+L(PUSHDI1)-L(name##START); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x87; /* DW_CFA_offset %edi */ \ + .uleb128 2; \ + .byte 0x40+L(PUSHSI1)-L(PUSHDI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0x86; /* DW_CFA_offset %esi */ \ + .uleb128 3; \ + .byte 0x40+L(PUSHBX1)-L(PUSHSI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 16; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 4; \ + .byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSI1)-L(POPBX1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0xc6; /* DW_CFA_restore %esi */ \ + .byte 0x40+L(POPDI1)-L(POPSI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4; \ + .byte 0xc7; /* DW_CFA_restore %edi */ \ + .byte 0x40+L(PUSHSTATE)-L(POPDI1); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0x40+L(PUSHDI2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0x87; /* DW_CFA_offset %edi */ \ + .uleb128 3; \ + .byte 0x40+L(PUSHSI2)-L(PUSHDI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 16; \ + .byte 0x86; /* DW_CFA_offset %esi */ \ + .uleb128 4; \ + .byte 0x40+L(PUSHBX2)-L(PUSHSI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 20; \ + .byte 0x83; /* DW_CFA_offset %ebx */ \ + .uleb128 5; \ + .byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 16; \ + .byte 0xc3; /* DW_CFA_restore %ebx */ \ + .byte 0x40+L(POPSI2)-L(POPBX2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 12; \ + .byte 0xc6; /* DW_CFA_restore %esi */ \ + .byte 0x40+L(POPDI2)-L(POPSI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 8; \ + .byte 0xc7; /* DW_CFA_restore %edi */ \ + .byte 0x40+L(POPSTATE)-L(POPDI2); /* DW_CFA_advance_loc+N */ \ + .byte 14; /* DW_CFA_def_cfa_offset */ \ + .uleb128 4 + + +# undef ASM_SIZE_DIRECTIVE +# define ASM_SIZE_DIRECTIVE(name) L(name##END): .size name,.-name; # define SAVE_OLDTYPE_0 movl %eax, %ecx; # define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0 -# define SAVE_OLDTYPE_2 pushl %eax; cfi_adjust_cfa_offset (4); +# define SAVE_OLDTYPE_2 pushl %eax; L(PUSHSTATE): # define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2 # define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2 # define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2 @@ -65,13 +313,11 @@ # define _PUSHCARGS_0 /* No arguments to push. */ # define _POPCARGS_0 /* No arguments to pop. */ -# define PUSHCARGS_1 movl %ebx, %edx; cfi_register (ebx, edx); PUSHCARGS_0 +# define PUSHCARGS_1 movl %ebx, %edx; L(SAVEBX2): PUSHCARGS_0 # define DOCARGS_1 _DOARGS_1 (4) -# define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; cfi_restore (ebx); -# define _PUSHCARGS_1 pushl %ebx; cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (ebx, 0); _PUSHCARGS_0 -# define _POPCARGS_1 _POPCARGS_0; popl %ebx; \ - cfi_adjust_cfa_offset (-4); cfi_restore (ebx); +# define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; L(RESTBX2): +# define _PUSHCARGS_1 pushl %ebx; L(PUSHBX2): _PUSHCARGS_0 +# define _POPCARGS_1 _POPCARGS_0; popl %ebx; L(POPBX2): # define PUSHCARGS_2 PUSHCARGS_1 # define DOCARGS_2 _DOARGS_2 (12) @@ -88,18 +334,14 @@ # define PUSHCARGS_4 _PUSHCARGS_4 # define DOCARGS_4 _DOARGS_4 (28) # define POPCARGS_4 _POPCARGS_4 -# define _PUSHCARGS_4 pushl %esi; cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (esi, 0); _PUSHCARGS_3 -# define _POPCARGS_4 _POPCARGS_3; popl %esi; \ - cfi_adjust_cfa_offset (-4); cfi_restore (esi); +# define _PUSHCARGS_4 pushl %esi; L(PUSHSI2): _PUSHCARGS_3 +# define _POPCARGS_4 _POPCARGS_3; popl %esi; L(POPSI2): # define PUSHCARGS_5 _PUSHCARGS_5 # define DOCARGS_5 _DOARGS_5 (36) # define POPCARGS_5 _POPCARGS_5 -# define _PUSHCARGS_5 pushl %edi; cfi_adjust_cfa_offset (4); \ - cfi_rel_offset (edi, 0); _PUSHCARGS_4 -# define _POPCARGS_5 _POPCARGS_4; popl %edi; \ - cfi_adjust_cfa_offset (-4); cfi_restore (edi); +# define _PUSHCARGS_5 pushl %edi; L(PUSHDI2): _PUSHCARGS_4 +# define _POPCARGS_5 _POPCARGS_4; popl %edi; L(POPDI2): # ifdef IS_IN_libpthread # define CENABLE call __pthread_enable_asynccancel; @@ -114,11 +356,9 @@ # error Unsupported library # endif # define POPSTATE_0 \ - pushl %eax; cfi_adjust_cfa_offset (4); movl %ecx, %eax; \ - CDISABLE; popl %eax; cfi_adjust_cfa_offset (-4); + pushl %eax; L(PUSHSTATE): movl %ecx, %eax; CDISABLE; popl %eax; L(POPSTATE): # define POPSTATE_1 POPSTATE_0 -# define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; \ - cfi_adjust_cfa_offset (-4); +# define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; L(POPSTATE): # define POPSTATE_3 POPSTATE_2 # define POPSTATE_4 POPSTATE_3 # define POPSTATE_5 POPSTATE_4 @@ -137,9 +377,3 @@ # define NO_CANCELLATION 1 #endif - -#ifndef __ASSEMBLER__ -# define RTLD_SINGLE_THREAD_P \ - __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ - header.multiple_threads) == 0, 1) -#endif |