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Fix syscall cancellation on hppa.
This commit is contained in:
John David Anglin
parent
a363f70336
commit
d71400dca6
23
ChangeLog
23
ChangeLog
@ -1,5 +1,28 @@
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2017-07-16 John David Anglin <danglin@gcc.gnu.org>
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* sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h (PSEUDO): Fix CFA offset.
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Use .cfi_def_cfa_offset instead of .cfi_offset. Don't record stack
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pointer offset. Correct PIC register offset. Don't mention frame
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related instructions in epilogue.
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(PUSHARGS_1): Correct offset.
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(PUSHARGS_2): Likewise.
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(PUSHARGS_3): Likewise.
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(PUSHARGS_4): Likewise.
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(PUSHARGS_5): Likewise.
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(PUSHARGS_6): Likewise.
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(POPARGS_1): Don't mention register restore.
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(POPARGS_2): Likewise.
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(POPARGS_3): Likewise.
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(POPARGS_4): Likewise.
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(POPARGS_5): Likewise.
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(POPARGS_6): Likewise.
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* sysdeps/unix/sysv/linux/hppa/sysdep.h (SAVE_PIC): Don't mention
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copy of PIC register.
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(LOAD_PIC): Likewise don't mention restore.
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(DO_CALL): Fix CFA offset. Use .cfi_def_cfa_offset instead of
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.cfi_offset. Don't record stack pointer offset. Correct PIC register
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offset. Don't mention frame related instructions in epilogue.
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* sysdeps/unix/sysv/linux/hppa/localplt.data: Remove _exit entry.
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* sysdeps/hppa/__longjmp.c (__longjmp): Remove extra braces.
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@ -62,12 +62,11 @@
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ENTRY (__##syscall_name##_nocancel) \
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DOARGS_##args ASM_LINE_SEP \
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stwm TREG, 64(%sp) ASM_LINE_SEP \
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.cfi_def_cfa_offset -64 ASM_LINE_SEP \
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.cfi_offset TREG, 0 ASM_LINE_SEP \
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.cfi_adjust_cfa_offset 64 ASM_LINE_SEP \
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stw %sp, -4(%sp) ASM_LINE_SEP \
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.cfi_offset 30, -4 ASM_LINE_SEP \
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stw %r19, -32(%sp) ASM_LINE_SEP \
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.cfi_offset 19, -32 ASM_LINE_SEP \
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.cfi_offset 19, 32 ASM_LINE_SEP \
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/* Save r19 */ ASM_LINE_SEP \
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SAVE_PIC(TREG) ASM_LINE_SEP \
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/* Do syscall, delay loads # */ ASM_LINE_SEP \
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@ -91,21 +90,19 @@ L(pre_nc_end): ASM_LINE_SEP \
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/* No need to LOAD_PIC */ ASM_LINE_SEP \
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/* Undo frame */ ASM_LINE_SEP \
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ldwm -64(%sp),TREG ASM_LINE_SEP \
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.cfi_adjust_cfa_offset -64 ASM_LINE_SEP \
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/* Restore rp before exit */ ASM_LINE_SEP \
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ldw -20(%sp), %rp ASM_LINE_SEP \
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.cfi_restore 2 ASM_LINE_SEP \
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ret ASM_LINE_SEP \
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END(__##syscall_name##_nocancel) ASM_LINE_SEP \
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/**********************************************/ASM_LINE_SEP \
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ENTRY (name) \
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DOARGS_##args ASM_LINE_SEP \
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stwm TREG, 64(%sp) ASM_LINE_SEP \
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.cfi_adjust_cfa_offset 64 ASM_LINE_SEP \
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.cfi_def_cfa_offset -64 ASM_LINE_SEP \
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.cfi_offset TREG, 0 ASM_LINE_SEP \
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stw %sp, -4(%sp) ASM_LINE_SEP \
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.cfi_offset 30, -4 ASM_LINE_SEP \
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stw %r19, -32(%sp) ASM_LINE_SEP \
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.cfi_offset 19, -32 ASM_LINE_SEP \
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.cfi_offset 19, 32 ASM_LINE_SEP \
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/* Done setting up frame, continue... */ ASM_LINE_SEP \
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SINGLE_THREAD_P ASM_LINE_SEP \
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cmpib,<>,n 0,%ret0,L(pseudo_cancel) ASM_LINE_SEP \
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@ -168,40 +165,32 @@ L(pre_end): ASM_LINE_SEP \
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/* No need to LOAD_PIC */ ASM_LINE_SEP \
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/* Undo frame */ ASM_LINE_SEP \
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ldwm -64(%sp),TREG ASM_LINE_SEP \
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.cfi_adjust_cfa_offset -64 ASM_LINE_SEP \
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/* Restore rp before exit */ ASM_LINE_SEP \
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ldw -20(%sp), %rp ASM_LINE_SEP \
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.cfi_restore 2 ASM_LINE_SEP
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ldw -20(%sp), %rp ASM_LINE_SEP
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/* Save arguments into our frame */
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# define PUSHARGS_0 /* nothing to do */
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# define PUSHARGS_1 PUSHARGS_0 stw %r26, -36(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 26, -36 ASM_LINE_SEP
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.cfi_offset 26, 28 ASM_LINE_SEP
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# define PUSHARGS_2 PUSHARGS_1 stw %r25, -40(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 25, -40 ASM_LINE_SEP
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.cfi_offset 25, 24 ASM_LINE_SEP
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# define PUSHARGS_3 PUSHARGS_2 stw %r24, -44(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 24, -44 ASM_LINE_SEP
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.cfi_offset 24, 20 ASM_LINE_SEP
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# define PUSHARGS_4 PUSHARGS_3 stw %r23, -48(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 23, -48 ASM_LINE_SEP
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.cfi_offset 23, 16 ASM_LINE_SEP
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# define PUSHARGS_5 PUSHARGS_4 stw %r22, -52(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 22, -52 ASM_LINE_SEP
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.cfi_offset 22, 12 ASM_LINE_SEP
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# define PUSHARGS_6 PUSHARGS_5 stw %r21, -56(%sr0,%sp) ASM_LINE_SEP \
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.cfi_offset 21, -56 ASM_LINE_SEP
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.cfi_offset 21, 8 ASM_LINE_SEP
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/* Bring them back from the stack */
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# define POPARGS_0 /* nothing to do */
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# define POPARGS_1 POPARGS_0 ldw -36(%sr0,%sp), %r26 ASM_LINE_SEP \
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.cfi_restore 26 ASM_LINE_SEP
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# define POPARGS_2 POPARGS_1 ldw -40(%sr0,%sp), %r25 ASM_LINE_SEP \
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.cfi_restore 25 ASM_LINE_SEP
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# define POPARGS_3 POPARGS_2 ldw -44(%sr0,%sp), %r24 ASM_LINE_SEP \
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.cfi_restore 24 ASM_LINE_SEP
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# define POPARGS_4 POPARGS_3 ldw -48(%sr0,%sp), %r23 ASM_LINE_SEP \
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.cfi_restore 23 ASM_LINE_SEP
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# define POPARGS_5 POPARGS_4 ldw -52(%sr0,%sp), %r22 ASM_LINE_SEP \
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.cfi_restore 22 ASM_LINE_SEP
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# define POPARGS_6 POPARGS_5 ldw -56(%sr0,%sp), %r21 ASM_LINE_SEP \
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.cfi_restore 21 ASM_LINE_SEP
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# define POPARGS_1 POPARGS_0 ldw -36(%sr0,%sp), %r26 ASM_LINE_SEP
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# define POPARGS_2 POPARGS_1 ldw -40(%sr0,%sp), %r25 ASM_LINE_SEP
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# define POPARGS_3 POPARGS_2 ldw -44(%sr0,%sp), %r24 ASM_LINE_SEP
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# define POPARGS_4 POPARGS_3 ldw -48(%sr0,%sp), %r23 ASM_LINE_SEP
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# define POPARGS_5 POPARGS_4 ldw -52(%sr0,%sp), %r22 ASM_LINE_SEP
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# define POPARGS_6 POPARGS_5 ldw -56(%sr0,%sp), %r21 ASM_LINE_SEP
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# if IS_IN (libpthread)
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# ifdef PIC
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@ -49,11 +49,9 @@
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to another function */
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#define TREG 4
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#define SAVE_PIC(SREG) \
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copy %r19, SREG ASM_LINE_SEP \
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.cfi_register 19, SREG
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copy %r19, SREG
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#define LOAD_PIC(LREG) \
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copy LREG , %r19 ASM_LINE_SEP \
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.cfi_restore 19
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copy LREG , %r19
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/* Inline assembly defines */
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#define TREG_ASM "%r4" /* Cant clobber r3, it holds framemarker */
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#define SAVE_ASM_PIC " copy %%r19, %" TREG_ASM "\n"
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@ -292,12 +290,11 @@
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#define DO_CALL(syscall_name, args) \
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/* Create a frame */ ASM_LINE_SEP \
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stwm TREG, 64(%sp) ASM_LINE_SEP \
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.cfi_def_cfa_offset -64 ASM_LINE_SEP \
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.cfi_offset TREG, 0 ASM_LINE_SEP \
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.cfi_adjust_cfa_offset 64 ASM_LINE_SEP \
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stw %sp, -4(%sp) ASM_LINE_SEP \
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.cfi_offset 30, -4 ASM_LINE_SEP \
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stw %r19, -32(%sp) ASM_LINE_SEP \
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.cfi_offset 19, -32 ASM_LINE_SEP \
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.cfi_offset 19, 32 ASM_LINE_SEP \
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/* Save r19 */ ASM_LINE_SEP \
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SAVE_PIC(TREG) ASM_LINE_SEP \
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/* Do syscall, delay loads # */ ASM_LINE_SEP \
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@ -320,10 +317,8 @@
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L(pre_end): ASM_LINE_SEP \
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/* Restore our frame, restoring TREG */ ASM_LINE_SEP \
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ldwm -64(%sp), TREG ASM_LINE_SEP \
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.cfi_adjust_cfa_offset -64 ASM_LINE_SEP \
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/* Restore return pointer */ ASM_LINE_SEP \
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ldw -20(%sp),%rp ASM_LINE_SEP \
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.cfi_restore 2 ASM_LINE_SEP
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ldw -20(%sp),%rp ASM_LINE_SEP
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/* We do nothing with the return, except hand it back to someone else */
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#undef DO_CALL_NOERRNO
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