/* Save current context and jump to a new context.
- Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2005-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
- 02110-1301 USA. */
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/* This is the common implementation of setcontext for powerpc32.
- It not complete in itself should be included in to a framework that
+ It not complete in itself should be included in to a framework that
defines:
__CONTEXT_FUNC_NAME
and if appropriate:
__CONTEXT_ENABLE_FPRS
__CONTEXT_ENABLE_VRS
- Any archecture that implements the Vector unit is assumed to also
+ Any architecture that implements the Vector unit is assumed to also
implement the floating unit. */
/* Stack frame offsets. */
stw r0,_UC_GREGS+(PT_R0*4)(r3)
mflr r0
stw r2,_UC_GREGS+(PT_R2*4)(r3)
- stw r4,_UC_GREGS+(PT_R4*4)(r3)
+ stw r4,_UC_GREGS+(PT_R4*4)(r3)
/* Set the callers LR_SAVE, and the ucontext LR and NIP to the callers
return address. */
stw r0,_UC_GREGS+(PT_LNK*4)(r3)
stw r29,_UC_GREGS+(PT_R29*4)(r3)
stw r30,_UC_GREGS+(PT_R30*4)(r3)
stw r31,_UC_GREGS+(PT_R31*4)(r3)
-
+
/* Save the value of R1. We had to push the stack before we
had the address of uc_reg_space. So compute the address of
the callers stack pointer and save it as R1. */
# ifdef PIC
mflr r8
-# ifdef HAVE_ASM_PPC_REL16
- bcl 20,31,1f
-1: mflr r7
- addis r7,r7,_GLOBAL_OFFSET_TABLE_-1b@ha
- addi r7,r7,_GLOBAL_OFFSET_TABLE_-1b@l
-# else
- bl _GLOBAL_OFFSET_TABLE_@local-4
- mflr r7
-# endif
+# define got_label GENERATE_GOT_LABEL (__CONTEXT_FUNC_NAME)
+ SETUP_GOT_ACCESS(r7,got_label)
+ addis r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@ha
+ addi r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@l
# ifdef SHARED
lwz r7,_rtld_global_ro@got(r7)
mtlr r8
- lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(r7)
+ lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+LOWORD(r7)
# else
lwz r7,_dl_hwcap@got(r7)
mtlr r8
- lwz r7,4(r7)
+ lwz r7,LOWORD(r7)
# endif
# else
- lis r7,(_dl_hwcap+4)@ha
- lwz r7,(_dl_hwcap+4)@l(r7)
+ lis r7,(_dl_hwcap+LOWORD)@ha
+ lwz r7,(_dl_hwcap+LOWORD)@l(r7)
# endif
# ifdef __CONTEXT_ENABLE_VRS
la r10,(_UC_VREGS)(r3)
la r9,(_UC_VREGS+16)(r3)
-
+
/* beq L(no_vec)*/
beq 2f
-/* address of the combined VSCR/VSAVE quadword. */
+/* address of the combined VSCR/VSAVE quadword. */
la r8,(_UC_VREGS+512)(r3)
/* Save the vector registers */
stvx v3,0,r9
addi r10,r10,32
addi r9,r9,32
-
+
stvx v0,0,r8
stvx v4,0,r10
stvx v30,0,r10
stvx v31,0,r9
stw r0,0(r8)
-
+
2: /*L(no_vec):*/
# endif /* __CONTEXT_ENABLE_VRS */
#endif /* __CONTEXT_ENABLE_FPRS */
/* Restore ucontext (parm1) from stack. */
lwz r12,_FRAME_PARM_SAVE1(r1)
- li r4,0
+ lwz r4,_FRAME_PARM_SAVE2(r1)
+ addi r4,r4,_UC_SIGMASK
stw r3,_UC_REGS_PTR(r12)
addi r5,r12,_UC_SIGMASK
li r3,SIG_SETMASK
cmpwi r3,0
bne 3f /* L(error_exit) */
- /*
- * If the new ucontext refers to the point where we were interrupted
- * by a signal, we have to use the rt_sigreturn system call to
- * return to the context so we get both LR and CTR restored.
- *
- * Otherwise, the context we are restoring is either just after
- * a procedure call (getcontext/swapcontext) or at the beginning
- * of a procedure call (makecontext), so we don't need to restore
- * r0, xer, ctr. We don't restore r2 since it will be used as
- * the TLS pointer.
- */
lwz r4,_FRAME_PARM_SAVE2(r1)
lwz r31,_UC_REGS_PTR(r4)
- lwz r0,_UC_GREGS+(PT_MSR*4)(r31)
- cmpwi r0,0
- bne 4f /* L(do_sigret) */
#ifdef __CONTEXT_ENABLE_FPRS
# ifdef __CONTEXT_ENABLE_VRS
# ifdef PIC
mflr r8
-# ifdef HAVE_ASM_PPC_REL16
- bcl 20,31,5f
-5: mflr r7
- addis r7,r7,_GLOBAL_OFFSET_TABLE_-5b@ha
- addi r7,r7,_GLOBAL_OFFSET_TABLE_-5b@l
-# else
- bl _GLOBAL_OFFSET_TABLE_@local-4
- mflr r7
-# endif
+ SETUP_GOT_ACCESS(r7,got_label)
+ addis r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@ha
+ addi r7,r7,_GLOBAL_OFFSET_TABLE_-got_label@l
mtlr r8
# ifdef SHARED
lwz r7,_rtld_global_ro@got(r7)
- lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(r7)
+ lwz r7,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+LOWORD(r7)
# else
lwz r7,_dl_hwcap@got(r7)
- lwz r7,4(r7)
+ lwz r7,LOWORD(r7)
# endif
# else
- lis r7,(_dl_hwcap+4)@ha
- lwz r7,(_dl_hwcap+4)@l(r7)
+ lis r7,(_dl_hwcap+LOWORD)@ha
+ lwz r7,(_dl_hwcap+LOWORD)@l(r7)
# endif
andis. r7,r7,(PPC_FEATURE_HAS_ALTIVEC >> 16)
la r10,(_UC_VREGS)(r31)
lfd fp0,_UC_FREGS+(0*8)(r31)
# ifdef _ARCH_PWR6
/* Use the extended four-operand version of the mtfsf insn. */
- mtfsf 0xff,fp0,1,0
+ mtfsf 0xff,fp31,1,0
# else
+ .machine push
+ .machine "power6"
/* Availability of DFP indicates a 64-bit FPSCR. */
andi. r6,r7,PPC_FEATURE_HAS_DFP
beq 7f
b 8f
/* Continue to operate on the FPSCR as if it were 32-bits. */
7: mtfsf 0xff,fp31
-8:
+8: .machine pop
#endif /* _ARCH_PWR6 */
lfd fp1,_UC_FREGS+(1*8)(r31)
lfd fp2,_UC_FREGS+(2*8)(r31)
lwz r31,_UC_GREGS+(PT_R31*4)(r31)
bctr
-
+
3:/*L(error_exit):*/
lwz r0,_FRAME_LR_SAVE+16(r1)
addi r1,r1,16
mtlr r0
blr
-
-4:/*L(do_sigret):*/
- addi r1,r4,-0xd0
- li r0,SYS_ify(rt_sigreturn)
- sc
- /* NOTREACHED */
END(__CONTEXT_FUNC_NAME)
-
projects / thirdparty / glibc.git / blobdiff