uClibc-ng - small C library for embedded systems branch master updated. v1.0.16-9-g345181f
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- Log ----------------------------------------------------------------- commit 345181fb9a36ad18c0a40ccb74bff9ee4d03819b Author: Waldemar Brodkorb wbx@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@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@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@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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