From 54ee14b3882bc7f2fcace383ee12da765e86e2ee Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 24 Sep 2003 03:22:56 +0000 Subject: Update. 2003-09-23 Ulrich Drepper * sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions [libc] (GLIBC_2.3.3): Add setcontext, getcontext, swapcontext, and makecontext. * sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: Correct change for include Altivec support for PPC32. It was not compatible. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h: Adjust offsets for ucontext_t change. * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S: Adjust for ucontext_t change. Add compatibility code. * sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S: Likewise. Patch by Paul Mackerras . 2003-02-25 Randolph Chung * sysdeps/hppa/Makefile: Include compat code in build. * sysdeps/hppa/libgcc-compat.c: New file. * sysdeps/hppa/Dist: Add libgcc-compat.c. * sysdeps/hppa/Versions [GLIBC_2.2]: Add __clz_tab. --- sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions | 1 + .../unix/sysv/linux/powerpc/powerpc32/getcontext.S | 26 ++++++++++++- .../sysv/linux/powerpc/powerpc32/makecontext.S | 44 +++++++++++++++------- .../unix/sysv/linux/powerpc/powerpc32/setcontext.S | 21 +++++++++-- .../sysv/linux/powerpc/powerpc32/swapcontext.S | 25 ++++++++++-- .../unix/sysv/linux/powerpc/powerpc32/ucontext_i.h | 12 ++++-- sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h | 36 +++++++++++++++--- 7 files changed, 135 insertions(+), 30 deletions(-) (limited to 'sysdeps/unix') diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions index 92158ee1b5..d667eadbce 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions @@ -22,5 +22,6 @@ libc { } GLIBC_2.3.3 { posix_fadvise64; posix_fallocate64; + setcontext; getcontext; swapcontext; makecontext; } } diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S index 9405d12cfb..3b1b3b9449 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S @@ -18,12 +18,20 @@ 02111-1307 USA. */ #include +#include #define __ASSEMBLY__ #include #include "ucontext_i.h" ENTRY(__getcontext) + /* + * Since we are not attempting to save the altivec registers, + * there is no need to get the register storage space + * aligned on a 16-byte boundary. + */ + addi r3,r3,_UC_REG_SPACE + stw r3,_UC_REGS_PTR - _UC_REG_SPACE(r3) stw r0,_UC_GREGS+(PT_R0*4)(r3) stw r1,_UC_GREGS+(PT_R1*4)(r3) mflr r0 @@ -112,7 +120,7 @@ ENTRY(__getcontext) stfd fp31,_UC_FREGS+(31*8)(r3) stfd fp0,_UC_FREGS+(32*8)(r3) - addi r5,r3,_UC_SIGMASK + addi r5,r3,_UC_SIGMASK - _UC_REG_SPACE li r4,0 li r3,SIG_BLOCK bl JUMPTARGET(sigprocmask) @@ -123,4 +131,18 @@ ENTRY(__getcontext) blr PSEUDO_END(__getcontext) -weak_alias(__getcontext, getcontext) +versioned_symbol (libc, __getcontext, getcontext, GLIBC_2_3_3) + +#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) + +#define _ERRNO_H 1 +#include + +ENTRY (__getcontext_stub) + li r3,ENOSYS + b JUMPTARGET(__syscall_error) + END (__getcontext_stub) + +compat_symbol (libc, __getcontext_stub, getcontext, GLIBC_2_1) + +#endif diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S index b875aa5de0..9cb0b874f5 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/makecontext.S @@ -18,6 +18,7 @@ 02111-1307 USA. */ #include +#include #define __ASSEMBLY__ #include @@ -25,22 +26,24 @@ ENTRY(__makecontext) /* Set up the first 7 args to the function in its registers */ - stw r6,_UC_GREGS+(PT_R3*4)(r3) - stw r7,_UC_GREGS+(PT_R4*4)(r3) - stw r8,_UC_GREGS+(PT_R5*4)(r3) - stw r9,_UC_GREGS+(PT_R6*4)(r3) - stw r10,_UC_GREGS+(PT_R7*4)(r3) + addi r11,r3,_UC_REG_SPACE + stw r11,_UC_REGS_PTR(r3) + stw r6,_UC_GREGS+(PT_R3*4)(r11) + stw r7,_UC_GREGS+(PT_R4*4)(r11) + stw r8,_UC_GREGS+(PT_R5*4)(r11) + stw r9,_UC_GREGS+(PT_R6*4)(r11) + stw r10,_UC_GREGS+(PT_R7*4)(r11) lwz r8,8(r1) lwz r9,12(r1) - stw r8,_UC_GREGS+(PT_R8*4)(r3) - stw r9,_UC_GREGS+(PT_R9*4)(r3) + stw r8,_UC_GREGS+(PT_R8*4)(r11) + stw r9,_UC_GREGS+(PT_R9*4)(r11) /* Set the NIP to the start of the function */ - stw r4,_UC_GREGS+(PT_NIP*4)(r3) + stw r4,_UC_GREGS+(PT_NIP*4)(r11) /* Set the function's r31 to ucp->uc_link for the exitcode below. */ lwz r7,_UC_LINK(r3) - stw r7,_UC_GREGS+(PT_R31*4)(r3) + stw r7,_UC_GREGS+(PT_R31*4)(r11) /* Set the function's LR to point to the exitcode below. */ #ifdef PIC @@ -53,7 +56,7 @@ ENTRY(__makecontext) lis r6,L(exitcode)@ha addi r6,r6,L(exitcode)@l #endif - stw r6,_UC_GREGS+(PT_LNK*4)(r3) + stw r6,_UC_GREGS+(PT_LNK*4)(r11) /* * Set up the stack frame for the function. @@ -71,7 +74,7 @@ ENTRY(__makecontext) cmpwi r5,8 blt 2f /* less than 8 args is easy */ lwz r10,16(r1) - stw r10,_UC_GREGS+(PT_R10*4)(r3) + stw r10,_UC_GREGS+(PT_R10*4)(r11) beq 2f /* if exactly 8 args */ subi r9,r5,3 subi r5,r5,8 @@ -83,7 +86,7 @@ ENTRY(__makecontext) 3: lwzu r10,4(r6) stwu r10,4(r8) bdnz 3b -2: stw r7,_UC_GREGS+(PT_R1*4)(r3) +2: stw r7,_UC_GREGS+(PT_R1*4)(r11) li r6,0 stw r6,0(r7) @@ -102,4 +105,19 @@ L(exitcode): b 4b END(__makecontext) -weak_alias(__makecontext, makecontext) + +versioned_symbol (libc, __makecontext, makecontext, GLIBC_2_3_3) + +#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) + +#define _ERRNO_H 1 +#include + +ENTRY (__makecontext_stub) + li r3,ENOSYS + b JUMPTARGET(__syscall_error) + END (__makecontext_stub) + +compat_symbol (libc, __makecontext_stub, makecontext, GLIBC_2_1) + +#endif diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S index 1539b40f01..deb946137d 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S @@ -18,6 +18,7 @@ 02111-1307 USA. */ #include +#include #define __ASSEMBLY__ #include @@ -28,7 +29,7 @@ ENTRY(__setcontext) stwu r1,-16(r1) stw r0,20(r1) stw r31,12(r1) - mr r31,r3 + lwz r31,_UC_REGS_PTR(r3) /* * If this ucontext refers to the point where we were interrupted @@ -144,6 +145,20 @@ L(do_sigret): sc /* NOTREACHED */ -PSEUDO_END(__setcontext) +PSEUDO_END (__setcontext) -weak_alias(__setcontext, setcontext) +versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_3) + +#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3) + +#define _ERRNO_H 1 +#include + +ENTRY (__setcontext_stub) + li r3,ENOSYS + b JUMPTARGET(__syscall_error) + END (__setcontext_stub) + +compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0) + +#endif diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S index 88cf0dae8f..fac6802959 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S @@ -18,6 +18,7 @@ 02111-1307 USA. */ #include +#include #define __ASSEMBLY__ #include @@ -25,6 +26,8 @@ ENTRY(__swapcontext) /* Save the current context */ + addi r3,r3,_UC_REG_SPACE + stw r3,_UC_REGS_PTR - _UC_REG_SPACE(r3) stw r0,_UC_GREGS+(PT_R0*4)(r3) stw r1,_UC_GREGS+(PT_R1*4)(r3) mflr r0 @@ -115,7 +118,7 @@ ENTRY(__swapcontext) stfd fp31,_UC_FREGS+(31*8)(r3) stfd fp0,_UC_FREGS+(32*8)(r3) - addi r5,r3,_UC_SIGMASK + addi r5,r3,_UC_SIGMASK - _UC_REG_SPACE addi r4,r4,_UC_SIGMASK li r3,SIG_SETMASK bl JUMPTARGET(sigprocmask) @@ -133,6 +136,8 @@ ENTRY(__swapcontext) * r0, xer, ctr. We don't restore r2 since it will be used as * the TLS pointer. */ + mr r4,r31 + lwz r31,_UC_REGS_PTR(r31) lwz r0,_UC_GREGS+(PT_MSR*4)(r31) cmpwi r0,0 bne L(do_sigret) @@ -223,11 +228,25 @@ L(error_exit): blr L(do_sigret): - addi r1,r31,-0xd0 + addi r1,r4,-0xd0 li r0,SYS_ify(rt_sigreturn) sc /* NOTREACHED */ PSEUDO_END(__swapcontext) -weak_alias(__swapcontext, swapcontext) +versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_3) + +#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) + +#define _ERRNO_H 1 +#include + +ENTRY (__swapcontext_stub) + li r3,ENOSYS + b JUMPTARGET(__syscall_error) + END (__swapcontext_stub) + +compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1) + +#endif diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h b/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h index e88a025d6a..1ae082a3ef 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/ucontext_i.h @@ -24,7 +24,11 @@ #define _UC_LINK 4 #define _UC_STACK_SP 8 #define _UC_STACK_SIZE 16 -#define _UC_SIGMASK 64 -#define _UC_GREGS 192 -#define _UC_FREGS 384 -#define _UC_VREGS 656 +#define _UC_REGS_PTR 48 +#define _UC_SIGMASK 52 +#define _UC_REG_SPACE 180 + +/* offsets within mcontext_t */ +#define _UC_GREGS 0 +#define _UC_FREGS 192 +#define _UC_VREGS 464 diff --git a/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h index 9ce93c8197..4bb8bb26d0 100644 --- a/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h +++ b/sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h @@ -74,14 +74,40 @@ typedef struct ucontext struct ucontext *uc_link; stack_t uc_stack; #if __WORDSIZE == 32 - /* These fields are for backwards compatibility. */ + /* + * These fields are set up this way to maximize source and + * binary compatibility with code written for the old + * ucontext_t definition, which didn't include space for the + * registers. + * + * Different versions of the kernel have stored the registers on + * signal delivery at different offsets from the ucontext struct. + * Programs should thus use the uc_mcontext.uc_regs pointer to + * find where the registers are actually stored. The registers + * will be stored within the ucontext_t struct but not necessarily + * at a fixed address. As a side-effect, this lets us achieve + * 16-byte alignment for the register storage space if the + * Altivec registers are to be saved, without requiring 16-byte + * alignment on the whole ucontext_t. + * + * The uc_mcontext.regs field is included for source compatibility + * with programs written against the older ucontext_t definition, + * and its name should therefore not change. The uc_pad field + * is for binary compatibility with programs compiled against the + * old ucontext_t; it ensures that uc_mcontext.regs and uc_sigmask + * are at the same offset as previously. + */ int uc_pad[7]; - mcontext_t *uc_regs; - unsigned int uc_oldsigmask[2]; - int uc_pad2; -#endif + union uc_regs_ptr { + struct pt_regs *regs; + mcontext_t *uc_regs; + } uc_mcontext; + sigset_t uc_sigmask; + char uc_reg_space[sizeof(mcontext_t) + 12]; /* last for extensibility */ +#else /* 64-bit */ sigset_t uc_sigmask; mcontext_t uc_mcontext; /* last for extensibility */ +#endif } ucontext_t; #endif /* sys/ucontext.h */ -- cgit v1.2.3