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- Log -----------------------------------------------------------------
commit 345181fb9a36ad18c0a40ccb74bff9ee4d03819b
Author: Waldemar Brodkorb <wbx(a)uclibc-ng.org>
Date: Mon Jul 11 16:59:22 2016 +0200
cleanup CALL_MCOUNT / PROF
As this is only implemented for a few architecture and not well
tested, just remove it.
commit a072066753e15c3a82bc32f89c1eef277af0b31e
Author: Waldemar Brodkorb <wbx(a)uclibc-ng.org>
Date: Sun Jul 17 02:41:43 2016 +0200
x86_64: remove dead code, SHARED is not defined when compiling
commit 4458cc330e6e5b7369151ebe172c00faceb43ade
Author: Waldemar Brodkorb <wbx(a)uclibc-ng.org>
Date: Fri Jul 8 16:01:41 2016 +0200
cleanup PTR_MANGLE/PTR_DEMANGLE support
As this is only implemented for a few architecture and not well
tested, just remove it.
Reviewed-by: Max Filippov <jcmvbkbc(a)gmail.com>
-----------------------------------------------------------------------
Summary of changes:
libc/sysdeps/linux/arc/sysdep.h | 5 --
libc/sysdeps/linux/arm/sysdep.h | 18 +------
libc/sysdeps/linux/i386/sysdep.h | 45 +---------------
libc/sysdeps/linux/ia64/sysdep.h | 8 +--
libc/sysdeps/linux/metag/sysdep.h | 4 --
libc/sysdeps/linux/mips/sysdep.h | 6 ---
libc/sysdeps/linux/powerpc/bits/syscalls.h | 26 ----------
libc/sysdeps/linux/sh/sysdep.h | 43 +---------------
libc/sysdeps/linux/sparc/sysdep.h | 5 --
libc/sysdeps/linux/x86_64/sched_getcpu.S | 20 +++-----
libc/sysdeps/linux/x86_64/sysdep.h | 60 +---------------------
libc/sysdeps/linux/xtensa/sysdep.h | 13 +----
.../nptl/sysdeps/pthread/pthread-functions.h | 8 ---
.../nptl/sysdeps/pthread/unwind-forcedunwind.c | 8 ---
14 files changed, 15 insertions(+), 254 deletions(-)
diff --git a/libc/sysdeps/linux/arc/sysdep.h b/libc/sysdeps/linux/arc/sysdep.h
index d75d891..5fcc63d 100644
--- a/libc/sysdeps/linux/arc/sysdep.h
+++ b/libc/sysdeps/linux/arc/sysdep.h
@@ -18,9 +18,4 @@ nm:
#endif /* __ASSEMBLER __*/
#include <common/sysdep.h>
-
-/* Pointer mangling is not yet supported */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
-
#endif
diff --git a/libc/sysdeps/linux/arm/sysdep.h b/libc/sysdeps/linux/arm/sysdep.h
index cdc276c..f8f2f8a 100644
--- a/libc/sysdeps/linux/arm/sysdep.h
+++ b/libc/sysdeps/linux/arm/sysdep.h
@@ -67,23 +67,12 @@
.globl C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function) \
.align ALIGNARG(4); \
- name##: \
- CALL_MCOUNT
+ name##:
#undef END
#define END(name) \
ASM_SIZE_DIRECTIVE(name)
-/* If compiled for profiling, call `mcount' at the start of each function. */
-#ifdef PROF
-#define CALL_MCOUNT \
- str lr,[sp, #-4]! ; \
- bl PLTJMP(mcount) ; \
- ldr lr, [sp], #4 ;
-#else
-#define CALL_MCOUNT /* Do nothing. */
-#endif
-
#ifdef NO_UNDERSCORES
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
@@ -277,9 +266,4 @@ __local_syscall_error: \
#define UNDOARGS_7 ldmfd sp!, {r4, r5, r6};
#endif /* __ASSEMBLER__ */
-
-/* Pointer mangling is not yet supported for ARM. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
-
#endif /* linux/arm/sysdep.h */
diff --git a/libc/sysdeps/linux/i386/sysdep.h b/libc/sysdeps/linux/i386/sysdep.h
index c92a106..79e53a1 100644
--- a/libc/sysdeps/linux/i386/sysdep.h
+++ b/libc/sysdeps/linux/i386/sysdep.h
@@ -47,26 +47,13 @@
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(4); \
C_LABEL(name) \
- cfi_startproc; \
- CALL_MCOUNT
+ cfi_startproc;
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name) \
-/* If compiled for profiling, call `mcount' at the start of each function. */
-#ifdef PROF
-/* The mcount code relies on a normal frame pointer being on the stack
- to locate our caller, so push one just for its benefit. */
-#define CALL_MCOUNT \
- pushl %ebp; cfi_adjust_cfa_offset (4); movl %esp, %ebp; \
- cfi_def_cfa_register (ebp); call JUMPTARGET(mcount); \
- popl %ebp; cfi_def_cfa (esp, 4);
-#else
-#define CALL_MCOUNT /* Do nothing. */
-#endif
-
#ifdef NO_UNDERSCORES
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
@@ -396,34 +383,4 @@ __x86.get_pc_thunk.reg: \
cfi_restore (ebp); L(POPBP1):
#endif /* __ASSEMBLER__ */
-
-
-/* Pointer mangling support. */
-#if defined NOT_IN_libc && defined IS_IN_rtld
-/* We cannot use the thread descriptor because in ld.so we use setjmp
- earlier than the descriptor is initialized. Using a global variable
- is too complicated here since we have no PC-relative addressing mode. */
-#else
-# ifdef __ASSEMBLER__
-# define PTR_MANGLE(reg) xorl %gs:POINTER_GUARD, reg; \
- roll $9, reg
-# define PTR_DEMANGLE(reg) rorl $9, reg; \
- xorl %gs:POINTER_GUARD, reg
-# else
-# include <stddef.h>
-# define PTR_MANGLE(var) __asm__ ("xorl %%gs:%c2, %0\n" \
- "roll $9, %0" \
- : "=r" (var) \
- : "0" (var), \
- "i" (offsetof (tcbhead_t, \
- pointer_guard)))
-# define PTR_DEMANGLE(var) __asm__ ("rorl $9, %0\n" \
- "xorl %%gs:%c2, %0" \
- : "=r" (var) \
- : "0" (var), \
- "i" (offsetof (tcbhead_t, \
- pointer_guard)))
-# endif
-#endif
-
#endif /* linux/i386/sysdep.h */
diff --git a/libc/sysdeps/linux/ia64/sysdep.h b/libc/sysdeps/linux/ia64/sysdep.h
index 3e7e467..3662114 100644
--- a/libc/sysdeps/linux/ia64/sysdep.h
+++ b/libc/sysdeps/linux/ia64/sysdep.h
@@ -39,15 +39,12 @@
#define C_LABEL(name) name/**/:
#endif
-#define CALL_MCOUNT
-
#define ENTRY(name) \
.text; \
.align 32; \
.proc C_SYMBOL_NAME(name); \
.global C_SYMBOL_NAME(name); \
- C_LABEL(name) \
- CALL_MCOUNT
+ C_LABEL(name)
#define HIDDEN_ENTRY(name) \
.text; \
@@ -55,8 +52,7 @@
.proc C_SYMBOL_NAME(name); \
.global C_SYMBOL_NAME(name); \
.hidden C_SYMBOL_NAME(name); \
- C_LABEL(name) \
- CALL_MCOUNT
+ C_LABEL(name)
#define LEAF(name) \
.text; \
diff --git a/libc/sysdeps/linux/metag/sysdep.h b/libc/sysdeps/linux/metag/sysdep.h
index a12f393..8750641 100644
--- a/libc/sysdeps/linux/metag/sysdep.h
+++ b/libc/sysdeps/linux/metag/sysdep.h
@@ -53,7 +53,3 @@ __local_syscall_error: \
#endif
#endif /* __ASSEMBLER __*/
-
-/* Pointer mangling is not yet supported for META. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
diff --git a/libc/sysdeps/linux/mips/sysdep.h b/libc/sysdeps/linux/mips/sysdep.h
index 86873ac..e0c5c94 100644
--- a/libc/sysdeps/linux/mips/sysdep.h
+++ b/libc/sysdeps/linux/mips/sysdep.h
@@ -128,11 +128,5 @@ L(syse1):
# define SYSCALL_ERROR_LABEL 99b
#endif
-#else /* ! __ASSEMBLER__ */
-
-/* Pointer mangling is not yet supported for MIPS. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
-
#endif /* __ASSEMBLER__ */
#endif /* _LINUX_MIPS_SYSDEP_H */
diff --git a/libc/sysdeps/linux/powerpc/bits/syscalls.h b/libc/sysdeps/linux/powerpc/bits/syscalls.h
index c52d5dd..d0f78c3 100644
--- a/libc/sysdeps/linux/powerpc/bits/syscalls.h
+++ b/libc/sysdeps/linux/powerpc/bits/syscalls.h
@@ -226,30 +226,4 @@ extern void __illegally_sized_syscall_arg6(void);
# define ASM_INPUT_6 ASM_INPUT_5, "6" (r8)
#endif /* __ASSEMBLER__ */
-
-
-/* Pointer mangling support. */
-#if defined NOT_IN_libc && defined IS_IN_rtld
-/* We cannot use the thread descriptor because in ld.so we use setjmp
- earlier than the descriptor is initialized. */
-#else
-# ifdef __ASSEMBLER__
-# define PTR_MANGLE(reg, tmpreg) \
- lwz tmpreg,POINTER_GUARD(r2); \
- xor reg,tmpreg,reg
-# define PTR_MANGLE2(reg, tmpreg) \
- xor reg,tmpreg,reg
-# define PTR_MANGLE3(destreg, reg, tmpreg) \
- lwz tmpreg,POINTER_GUARD(r2); \
- xor destreg,tmpreg,reg
-# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
-# define PTR_DEMANGLE2(reg, tmpreg) PTR_MANGLE2 (reg, tmpreg)
-# define PTR_DEMANGLE3(destreg, reg, tmpreg) PTR_MANGLE3 (destreg, reg, tmpreg)
-# else
-# define PTR_MANGLE(var) \
- (var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
-# define PTR_DEMANGLE(var) PTR_MANGLE (var)
-# endif
-#endif
-
#endif /* _BITS_SYSCALLS_H */
diff --git a/libc/sysdeps/linux/sh/sysdep.h b/libc/sysdeps/linux/sh/sysdep.h
index b9b0009..137dd1d 100644
--- a/libc/sysdeps/linux/sh/sysdep.h
+++ b/libc/sysdeps/linux/sh/sysdep.h
@@ -42,34 +42,13 @@
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function) \
.align ALIGNARG(5); \
C_LABEL(name) \
- cfi_startproc; \
- CALL_MCOUNT
+ cfi_startproc;
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(name))
-/* If compiled for profiling, call `mcount' at the start of each function. */
-#ifdef PROF
-#define CALL_MCOUNT \
- mov.l 1f,r1; \
- sts.l pr,@-r15; \
- cfi_adjust_cfa_offset (4); \
- cfi_rel_offset (pr, 0); \
- mova 2f,r0; \
- jmp @r1; \
- lds r0,pr; \
- .align 2; \
-1: .long mcount; \
-2: lds.l @r15+,pr; \
- cfi_adjust_cfa_offset (-4); \
- cfi_restore (pr)
-
-#else
-#define CALL_MCOUNT /* Do nothing. */
-#endif
-
#ifdef __UCLIBC_UNDERSCORES__
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
@@ -271,23 +250,3 @@
1: .long SYS_ify (syscall_name); \
2:
#endif /* __ASSEMBLER__ */
-
-/* Pointer mangling support. */
-#if defined NOT_IN_libc && defined IS_IN_rtld
-/* We cannot use the thread descriptor because in ld.so we use setjmp
- earlier than the descriptor is initialized. Using a global variable
- is too complicated here since we have no PC-relative addressing mode. */
-#else
-# ifdef __ASSEMBLER__
-# define PTR_MANGLE(reg, tmp) \
- stc gbr,tmp; mov.l @(POINTER_GUARD,tmp),tmp; xor tmp,reg
-# define PTR_MANGLE2(reg, tmp) xor tmp,reg
-# define PTR_DEMANGLE(reg, tmp) PTR_MANGLE (reg, tmp)
-# define PTR_DEMANGLE2(reg, tmp) PTR_MANGLE2 (reg, tmp)
-# else
-# define PTR_MANGLE(var) \
- (var) = (void *) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
-# define PTR_DEMANGLE(var) PTR_MANGLE (var)
-# endif
-#endif
-
diff --git a/libc/sysdeps/linux/sparc/sysdep.h b/libc/sysdeps/linux/sparc/sysdep.h
index cf3e3af..c3897ec 100644
--- a/libc/sysdeps/linux/sparc/sysdep.h
+++ b/libc/sysdeps/linux/sparc/sysdep.h
@@ -61,9 +61,4 @@ ENTRY(name); \
#endif /* __ASSEMBLER__ */
-
-/* Pointer mangling is not yet supported for SPARC. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
-
#endif
diff --git a/libc/sysdeps/linux/x86_64/sched_getcpu.S b/libc/sysdeps/linux/x86_64/sched_getcpu.S
index f8c09c0..3964bf1 100644
--- a/libc/sysdeps/linux/x86_64/sched_getcpu.S
+++ b/libc/sysdeps/linux/x86_64/sched_getcpu.S
@@ -35,27 +35,21 @@ ENTRY (sched_getcpu)
movl $VGETCPU_CACHE_OFFSET, %edx
addq %fs:0, %rdx
-#ifdef SHARED
- movq __vdso_getcpu(%rip), %rax
- PTR_DEMANGLE (%rax)
- callq *%rax
-#else
-# ifdef __NR_getcpu
+#ifdef __NR_getcpu
movl $__NR_getcpu, %eax
syscall
-# ifndef __ASSUME_GETCPU_SYSCALL
+# ifndef __ASSUME_GETCPU_SYSCALL
cmpq $-ENOSYS, %rax
jne 1f
-# endif
# endif
-# ifndef __ASSUME_GETCPU_SYSCALL
+#endif
+#ifndef __ASSUME_GETCPU_SYSCALL
movq $VSYSCALL_ADDR_vgetcpu, %rax
callq *%rax
1:
-# else
-# ifndef __NR_getcpu
-# error "cannot happen"
-# endif
+#else
+# ifndef __NR_getcpu
+# error "cannot happen"
# endif
#endif
diff --git a/libc/sysdeps/linux/x86_64/sysdep.h b/libc/sysdeps/linux/x86_64/sysdep.h
index 3bfeaca..a5971d7 100644
--- a/libc/sysdeps/linux/x86_64/sysdep.h
+++ b/libc/sysdeps/linux/x86_64/sysdep.h
@@ -42,30 +42,13 @@
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
.align ALIGNARG(4); \
C_LABEL(name) \
- cfi_startproc; \
- CALL_MCOUNT
+ cfi_startproc;
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name)
-/* If compiled for profiling, call `mcount' at the start of each function. */
-#ifdef PROF
-/* The mcount code relies on a normal frame pointer being on the stack
- to locate our caller, so push one just for its benefit. */
-#define CALL_MCOUNT \
- pushq %rbp; \
- cfi_adjust_cfa_offset(8); \
- movq %rsp, %rbp; \
- cfi_def_cfa_register(%rbp); \
- call JUMPTARGET(mcount); \
- popq %rbp; \
- cfi_def_cfa(rsp,8);
-#else
-#define CALL_MCOUNT /* Do nothing. */
-#endif
-
#ifdef NO_UNDERSCORES
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
@@ -286,45 +269,4 @@ lose: \
# define DOARGS_6 DOARGS_5
#endif /* __ASSEMBLER__ */
-
-
-/* Pointer mangling support. */
-#if defined NOT_IN_libc && defined IS_IN_rtld
-/* We cannot use the thread descriptor because in ld.so we use setjmp
- earlier than the descriptor is initialized. */
-# ifdef __ASSEMBLER__
-# define PTR_MANGLE(reg) xorq __pointer_chk_guard_local(%rip), reg; \
- rolq $17, reg
-# define PTR_DEMANGLE(reg) rorq $17, reg; \
- xorq __pointer_chk_guard_local(%rip), reg
-# else
-# define PTR_MANGLE(reg) __asm__ ("xorq __pointer_chk_guard_local(%%rip), %0\n" \
- "rolq $17, %0" \
- : "=r" (reg) : "0" (reg))
-# define PTR_DEMANGLE(reg) __asm__ ("rorq $17, %0\n" \
- "xorq __pointer_chk_guard_local(%%rip), %0" \
- : "=r" (reg) : "0" (reg))
-# endif
-#else
-# ifdef __ASSEMBLER__
-# define PTR_MANGLE(reg) xorq %fs:POINTER_GUARD, reg; \
- rolq $17, reg
-# define PTR_DEMANGLE(reg) rorq $17, reg; \
- xorq %fs:POINTER_GUARD, reg
-# else
-# define PTR_MANGLE(var) __asm__ ("xorq %%fs:%c2, %0\n" \
- "rolq $17, %0" \
- : "=r" (var) \
- : "0" (var), \
- "i" (offsetof (tcbhead_t, \
- pointer_guard)))
-# define PTR_DEMANGLE(var) __asm__ ("rorq $17, %0\n" \
- "xorq %%fs:%c2, %0" \
- : "=r" (var) \
- : "0" (var), \
- "i" (offsetof (tcbhead_t, \
- pointer_guard)))
-# endif
-#endif
-
#endif /* linux/x86_64/sysdep.h */
diff --git a/libc/sysdeps/linux/xtensa/sysdep.h b/libc/sysdeps/linux/xtensa/sysdep.h
index f5a40eb..8d1bfcf 100644
--- a/libc/sysdeps/linux/xtensa/sysdep.h
+++ b/libc/sysdeps/linux/xtensa/sysdep.h
@@ -45,8 +45,7 @@
.align ALIGNARG(2); \
LITERAL_POSITION; \
C_LABEL(name) \
- abi_entry(sp, FRAMESIZE); \
- CALL_MCOUNT
+ abi_entry(sp, FRAMESIZE);
#define HIDDEN_ENTRY(name) \
.globl C_SYMBOL_NAME(name); \
@@ -55,8 +54,7 @@
.align ALIGNARG(2); \
LITERAL_POSITION; \
C_LABEL(name) \
- abi_entry(sp, FRAMESIZE); \
- CALL_MCOUNT
+ abi_entry(sp, FRAMESIZE);
#undef END
#define END(name) ASM_SIZE_DIRECTIVE(name)
@@ -92,8 +90,6 @@
#error Unsupported Xtensa ABI
#endif
#endif
-#define CALL_MCOUNT /* Do nothing. */
-
/* Linux uses a negative return value to indicate syscall errors,
unlike most Unices, which use the condition codes' carry flag.
@@ -207,9 +203,4 @@
#endif /* _LIBC_REENTRANT */
#endif /* __ASSEMBLER__ */
-
-/* Pointer mangling is not yet supported for Xtensa. */
-#define PTR_MANGLE(var) (void) (var)
-#define PTR_DEMANGLE(var) (void) (var)
-
#endif /* _LINUX_XTENSA_SYSDEP_H */
diff --git a/libpthread/nptl/sysdeps/pthread/pthread-functions.h b/libpthread/nptl/sysdeps/pthread/pthread-functions.h
index 119fe6b..9c78180 100644
--- a/libpthread/nptl/sysdeps/pthread/pthread-functions.h
+++ b/libpthread/nptl/sysdeps/pthread/pthread-functions.h
@@ -102,15 +102,7 @@ struct pthread_functions
extern struct pthread_functions __libc_pthread_functions attribute_hidden;
extern int __libc_pthread_functions_init attribute_hidden;
-#if 0 /* def PTR_DEMANGLE */ /* we did not mangle, so do not demangle */
-# define PTHFCT_CALL(fct, params) \
- ({ __typeof (__libc_pthread_functions.fct) __p; \
- __p = __libc_pthread_functions.fct; \
- PTR_DEMANGLE (__p); \
- __p params; })
-#else
# define PTHFCT_CALL(fct, params) \
__libc_pthread_functions.fct params
-#endif
#endif /* pthread-functions.h */
diff --git a/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c b/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c
index 6936a89..6b6ad6f 100644
--- a/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c
+++ b/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c
@@ -70,13 +70,9 @@ pthread_cancel_init (void)
abort();
}
- PTR_MANGLE (resume);
libgcc_s_resume = resume;
- PTR_MANGLE (personality);
libgcc_s_personality = personality;
- PTR_MANGLE (forcedunwind);
libgcc_s_forcedunwind = forcedunwind;
- PTR_MANGLE (getcfa);
libgcc_s_getcfa = getcfa;
/* Make sure libgcc_s_handle is written last. Otherwise,
pthread_cancel_init might return early even when the pointer the
@@ -104,7 +100,6 @@ _Unwind_Resume (struct _Unwind_Exception *exc)
pthread_cancel_init ();
void (*resume) (struct _Unwind_Exception *exc) = libgcc_s_resume;
- PTR_DEMANGLE (resume);
resume (exc);
}
@@ -125,7 +120,6 @@ __gcc_personality_v0 (int version, _Unwind_Action actions,
_Unwind_Reason_Code (*personality)
(int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
struct _Unwind_Context *) = libgcc_s_personality;
- PTR_DEMANGLE (personality);
return personality (version, actions, exception_class, ue_header, context);
}
@@ -139,7 +133,6 @@ _Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
_Unwind_Reason_Code (*forcedunwind)
(struct _Unwind_Exception *, _Unwind_Stop_Fn, void *)
= libgcc_s_forcedunwind;
- PTR_DEMANGLE (forcedunwind);
return forcedunwind (exc, stop, stop_argument);
}
@@ -150,6 +143,5 @@ _Unwind_GetCFA (struct _Unwind_Context *context)
pthread_cancel_init ();
_Unwind_Word (*getcfa) (struct _Unwind_Context *) = libgcc_s_getcfa;
- PTR_DEMANGLE (getcfa);
return getcfa (context);
}
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