| Server IP : 104.21.38.3 / Your IP : 162.158.170.252 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/src/linux-headers-5.15.0-143/arch/s390/include/asm/ |
Upload File : |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_S390_ALTERNATIVE_ASM_H #define _ASM_S390_ALTERNATIVE_ASM_H #ifdef __ASSEMBLY__ /* * Check the length of an instruction sequence. The length may not be larger * than 254 bytes and it has to be divisible by 2. */ .macro alt_len_check start,end .if ( \end - \start ) > 254 .error "cpu alternatives does not support instructions blocks > 254 bytes\n" .endif .if ( \end - \start ) % 2 .error "cpu alternatives instructions length is odd\n" .endif .endm /* * Issue one struct alt_instr descriptor entry (need to put it into * the section .altinstructions, see below). This entry contains * enough information for the alternatives patching code to patch an * instruction. See apply_alternatives(). */ .macro alt_entry orig_start, orig_end, alt_start, alt_end, feature .long \orig_start - . .long \alt_start - . .word \feature .byte \orig_end - \orig_start .byte \alt_end - \alt_start .endm /* * Fill up @bytes with nops. The macro emits 6-byte nop instructions * for the bulk of the area, possibly followed by a 4-byte and/or * a 2-byte nop if the size of the area is not divisible by 6. */ .macro alt_pad_fill bytes .fill ( \bytes ) / 6, 6, 0xc0040000 .fill ( \bytes ) % 6 / 4, 4, 0x47000000 .fill ( \bytes ) % 6 % 4 / 2, 2, 0x0700 .endm /* * Fill up @bytes with nops. If the number of bytes is larger * than 6, emit a jg instruction to branch over all nops, then * fill an area of size (@bytes - 6) with nop instructions. */ .macro alt_pad bytes .if ( \bytes > 0 ) .if ( \bytes > 6 ) jg . + \bytes alt_pad_fill \bytes - 6 .else alt_pad_fill \bytes .endif .endif .endm /* * Define an alternative between two instructions. If @feature is * present, early code in apply_alternatives() replaces @oldinstr with * @newinstr. ".skip" directive takes care of proper instruction padding * in case @newinstr is longer than @oldinstr. */ .macro ALTERNATIVE oldinstr, newinstr, feature .pushsection .altinstr_replacement,"ax" 770: \newinstr 771: .popsection 772: \oldinstr 773: alt_len_check 770b, 771b alt_len_check 772b, 773b alt_pad ( ( 771b - 770b ) - ( 773b - 772b ) ) 774: .pushsection .altinstructions,"a" alt_entry 772b, 774b, 770b, 771b, \feature .popsection .endm /* * Define an alternative between two instructions. If @feature is * present, early code in apply_alternatives() replaces @oldinstr with * @newinstr. ".skip" directive takes care of proper instruction padding * in case @newinstr is longer than @oldinstr. */ .macro ALTERNATIVE_2 oldinstr, newinstr1, feature1, newinstr2, feature2 .pushsection .altinstr_replacement,"ax" 770: \newinstr1 771: \newinstr2 772: .popsection 773: \oldinstr 774: alt_len_check 770b, 771b alt_len_check 771b, 772b alt_len_check 773b, 774b .if ( 771b - 770b > 772b - 771b ) alt_pad ( ( 771b - 770b ) - ( 774b - 773b ) ) .else alt_pad ( ( 772b - 771b ) - ( 774b - 773b ) ) .endif 775: .pushsection .altinstructions,"a" alt_entry 773b, 775b, 770b, 771b,\feature1 alt_entry 773b, 775b, 771b, 772b,\feature2 .popsection .endm #endif /* __ASSEMBLY__ */ #endif /* _ASM_S390_ALTERNATIVE_ASM_H */