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-rw-r--r--sysdeps/powerpc/powerpc64/sysdep.h222
1 files changed, 107 insertions, 115 deletions
diff --git a/sysdeps/powerpc/powerpc64/sysdep.h b/sysdeps/powerpc/powerpc64/sysdep.h
index 7393944ba6..2df1d9b6e6 100644
--- a/sysdeps/powerpc/powerpc64/sysdep.h
+++ b/sysdeps/powerpc/powerpc64/sysdep.h
@@ -1,5 +1,5 @@
/* Assembly macros for 64-bit PowerPC.
- Copyright (C) 2002-2016 Free Software Foundation, Inc.
+ Copyright (C) 2002-2018 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
@@ -21,66 +21,40 @@
#ifdef __ASSEMBLER__
/* Stack frame offsets. */
-#if _CALL_ELF != 2
-#define FRAME_MIN_SIZE 112
-#define FRAME_MIN_SIZE_PARM 112
#define FRAME_BACKCHAIN 0
#define FRAME_CR_SAVE 8
#define FRAME_LR_SAVE 16
+#if _CALL_ELF != 2
+#define FRAME_MIN_SIZE 112
+#define FRAME_MIN_SIZE_PARM 112
#define FRAME_TOC_SAVE 40
#define FRAME_PARM_SAVE 48
-#define FRAME_PARM1_SAVE 48
-#define FRAME_PARM2_SAVE 56
-#define FRAME_PARM3_SAVE 64
-#define FRAME_PARM4_SAVE 72
-#define FRAME_PARM5_SAVE 80
-#define FRAME_PARM6_SAVE 88
-#define FRAME_PARM7_SAVE 96
-#define FRAME_PARM8_SAVE 104
-#define FRAME_PARM9_SAVE 112
#else
#define FRAME_MIN_SIZE 32
#define FRAME_MIN_SIZE_PARM 96
-#define FRAME_BACKCHAIN 0
-#define FRAME_CR_SAVE 8
-#define FRAME_LR_SAVE 16
#define FRAME_TOC_SAVE 24
#define FRAME_PARM_SAVE 32
-#define FRAME_PARM1_SAVE 32
-#define FRAME_PARM2_SAVE 40
-#define FRAME_PARM3_SAVE 48
-#define FRAME_PARM4_SAVE 56
-#define FRAME_PARM5_SAVE 64
-#define FRAME_PARM6_SAVE 72
-#define FRAME_PARM7_SAVE 80
-#define FRAME_PARM8_SAVE 88
-#define FRAME_PARM9_SAVE 96
#endif
/* Support macros for CALL_MCOUNT. */
-#if _CALL_ELF == 2
-#define call_mcount_parm_offset (-64)
-#else
-#define call_mcount_parm_offset FRAME_PARM_SAVE
-#endif
.macro SAVE_ARG NARG
.if \NARG
SAVE_ARG \NARG-1
- std 2+\NARG,call_mcount_parm_offset-8+8*(\NARG)(1)
+ std 2+\NARG,-FRAME_MIN_SIZE_PARM+FRAME_PARM_SAVE-8+8*(\NARG)(1)
.endif
.endm
.macro REST_ARG NARG
.if \NARG
REST_ARG \NARG-1
- ld 2+\NARG,FRAME_MIN_SIZE_PARM+call_mcount_parm_offset-8+8*(\NARG)(1)
+ ld 2+\NARG,FRAME_PARM_SAVE-8+8*(\NARG)(1)
.endif
.endm
.macro CFI_SAVE_ARG NARG
.if \NARG
CFI_SAVE_ARG \NARG-1
- cfi_offset(2+\NARG,call_mcount_parm_offset-8+8*(\NARG))
+ cfi_offset(2+\NARG,-FRAME_MIN_SIZE_PARM+FRAME_PARM_SAVE-8+8*(\NARG))
.endif
.endm
@@ -132,25 +106,25 @@
# define OPD_ENT(name) .quad BODY_LABEL (name), .TOC.@tocbase, 0
#endif
-#define ENTRY_1(name) \
+#define ENTRY_1(name) \
.type BODY_LABEL(name),@function; \
.globl name; \
.section ".opd","aw"; \
- .align 3; \
-name##: OPD_ENT (name); \
- .previous;
+ .p2align 3;FUNC_LABEL(name): \
+ OPD_ENT (name); \
+ .previous
-#define DOT_LABEL(X) X
+#define FUNC_LABEL(X) X
#define BODY_LABEL(X) .LY##X
-#define ENTRY_2(name) \
+#define ENTRY_2(name) \
.type name,@function; \
ENTRY_1(name)
-#define END_2(name) \
+#define END_2(name) \
.size name,.-BODY_LABEL(name); \
- .size BODY_LABEL(name),.-BODY_LABEL(name);
+ .size BODY_LABEL(name),.-BODY_LABEL(name)
#define LOCALENTRY(name)
-#else /* _CALL_ELF */
+#else /* _CALL_ELF == 2 */
/* Macro to prepare for calling via a function pointer. */
.macro PPC64_LOAD_FUNCPTR PTR
@@ -158,48 +132,65 @@ name##: OPD_ENT (name); \
mtctr r12
.endm
-#define DOT_LABEL(X) X
+#define FUNC_LABEL(X) X
#define BODY_LABEL(X) X
-#define ENTRY_2(name) \
+#define ENTRY_2(name) \
.globl name; \
- .type name,@function;
-#define END_2(name) \
- .size name,.-name;
-#define LOCALENTRY(name) \
-1: addis r2,r12,.TOC.-1b@ha; \
- addi r2,r2,.TOC.-1b@l; \
- .localentry name,.-name;
+ .type name,@function
+#define END_2(name) \
+ .size name,.-name
+#define LOCALENTRY(name) \
+1: addis r2,r12,.TOC.-1b@ha; \
+ addi r2,r2,.TOC.-1b@l; \
+ .localentry name,.-name
#endif /* _CALL_ELF */
-#define ENTRY(name) \
- .section ".text"; \
- ENTRY_2(name) \
- .align ALIGNARG(2); \
-BODY_LABEL(name): \
- cfi_startproc; \
- LOCALENTRY(name)
+ .macro NOPS NARG
+ .if \NARG
+ NOPS \NARG-1
+ nop
+ .endif
+ .endm
+
+ .macro ENTRY_3 name, alignp2=2, nopwords=0
+ .text
+ ENTRY_2(\name)
+ .p2align \alignp2
+ NOPS \nopwords
+BODY_LABEL(\name):
+ .endm
-#define EALIGN_W_0 /* No words to insert. */
-#define EALIGN_W_1 nop
-#define EALIGN_W_2 nop;nop
-#define EALIGN_W_3 nop;nop;nop
-#define EALIGN_W_4 EALIGN_W_3;nop
-#define EALIGN_W_5 EALIGN_W_4;nop
-#define EALIGN_W_6 EALIGN_W_5;nop
-#define EALIGN_W_7 EALIGN_W_6;nop
-
-/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
- past a 2^alignt boundary. */
-#define EALIGN(name, alignt, words) \
- .section ".text"; \
- ENTRY_2(name) \
- .align ALIGNARG(alignt); \
- EALIGN_W_##words; \
-BODY_LABEL(name): \
+/* Use ENTRY_TOCLESS for functions that make no use of r2 and
+ guarantee r2 is unchanged on exit. Any function that has @toc or
+ @got relocs uses r2. Functions that call other functions via the
+ PLT use r2. Use ENTRY for functions that may use or change r2.
+ The first argument is the function name.
+ The optional second argument specifies alignment of the function's
+ code, as the logarithm base two of the byte alignment. For
+ example, a value of four aligns to a sixteen byte boundary.
+ The optional third argument specifies the number of NOPs to emit
+ before the start of the function's code. */
+#ifndef PROF
+#define ENTRY_TOCLESS(name, ...) \
+ ENTRY_3 name, ## __VA_ARGS__; \
+ cfi_startproc
+
+#define ENTRY(name, ...) \
+ ENTRY_TOCLESS(name, ## __VA_ARGS__); \
+ LOCALENTRY(name)
+#else
+/* The call to _mcount is potentially via the plt, so profiling code
+ is never free of an r2 use. */
+#define ENTRY_TOCLESS(name, ...) \
+ ENTRY_3 name, ## __VA_ARGS__; \
cfi_startproc; \
LOCALENTRY(name)
+#define ENTRY(name, ...) \
+ ENTRY_TOCLESS(name, ## __VA_ARGS__)
+#endif
+
/* Local labels stripped out by the linker. */
#undef L
#define L(x) .L##x
@@ -246,7 +237,7 @@ LT_LABEL(name): ; \
LT_LABELSUFFIX(name,_name_start): ;\
.ascii stringify(name) ; \
LT_LABELSUFFIX(name,_name_end): ; \
- .align 2 ;
+ .p2align 2
#define TRACEBACK_MASK(name,mask) \
LT_LABEL(name): ; \
@@ -257,23 +248,23 @@ LT_LABEL(name): ; \
LT_LABELSUFFIX(name,_name_start): ;\
.ascii stringify(name) ; \
LT_LABELSUFFIX(name,_name_end): ; \
- .align 2 ;
+ .p2align 2
/* END generates Traceback tables */
#undef END
#define END(name) \
cfi_endproc; \
- TRACEBACK(name) \
+ TRACEBACK(name); \
END_2(name)
/* This form supports more informative traceback tables */
#define END_GEN_TB(name,mask) \
cfi_endproc; \
- TRACEBACK_MASK(name,mask) \
+ TRACEBACK_MASK(name,mask); \
END_2(name)
-#if !IS_IN(rtld) && defined (ENABLE_LOCK_ELISION)
-# define ABORT_TRANSACTION \
+#if !IS_IN(rtld)
+# define ABORT_TRANSACTION_IMPL \
cmpdi 13,0; \
beq 1f; \
lwz 0,TM_CAPABLE(13); \
@@ -281,11 +272,12 @@ LT_LABELSUFFIX(name,_name_end): ; \
beq 1f; \
li 11,_ABORT_SYSCALL; \
tabort. 11; \
- .align 4; \
+ .p2align 4; \
1:
#else
-# define ABORT_TRANSACTION
+# define ABORT_TRANSACTION_IMPL
#endif
+#define ABORT_TRANSACTION ABORT_TRANSACTION_IMPL
#define DO_CALL(syscall) \
ABORT_TRANSACTION \
@@ -294,12 +286,12 @@ LT_LABELSUFFIX(name,_name_end): ; \
/* ppc64 is always PIC */
#undef JUMPTARGET
-#define JUMPTARGET(name) DOT_LABEL(name)
+#define JUMPTARGET(name) FUNC_LABEL(name)
#define PSEUDO(name, syscall_name, args) \
- .section ".text"; \
- ENTRY (name) \
- DO_CALL (SYS_ify (syscall_name));
+ .section ".text"; \
+ ENTRY (name); \
+ DO_CALL (SYS_ify (syscall_name))
#ifdef SHARED
#define TAIL_CALL_SYSCALL_ERROR \
@@ -340,9 +332,9 @@ LT_LABELSUFFIX(name,_name_end): ; \
END (name)
#define PSEUDO_NOERRNO(name, syscall_name, args) \
- .section ".text"; \
- ENTRY (name) \
- DO_CALL (SYS_ify (syscall_name));
+ .section ".text"; \
+ ENTRY (name); \
+ DO_CALL (SYS_ify (syscall_name))
#define PSEUDO_RET_NOERRNO \
blr
@@ -354,9 +346,9 @@ LT_LABELSUFFIX(name,_name_end): ; \
END (name)
#define PSEUDO_ERRVAL(name, syscall_name, args) \
- .section ".text"; \
- ENTRY (name) \
- DO_CALL (SYS_ify (syscall_name));
+ .section ".text"; \
+ ENTRY (name); \
+ DO_CALL (SYS_ify (syscall_name))
#define PSEUDO_RET_ERRVAL \
blr
@@ -372,53 +364,53 @@ LT_LABELSUFFIX(name,_name_end): ; \
#if _CALL_ELF != 2
#define PPC64_LOAD_FUNCPTR(ptr) \
- "ld 12,0(" #ptr ");\n" \
- "ld 2,8(" #ptr ");\n" \
- "mtctr 12;\n" \
- "ld 11,16(" #ptr ");"
+ "ld 12,0(" #ptr ")\n" \
+ "ld 2,8(" #ptr ")\n" \
+ "mtctr 12\n" \
+ "ld 11,16(" #ptr ")"
#ifdef USE_PPC64_OVERLAPPING_OPD
-# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase;"
+# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase"
#else
-# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase, 0;"
+# define OPD_ENT(name) ".quad " BODY_PREFIX #name ", .TOC.@tocbase, 0"
#endif
#define ENTRY_1(name) \
- ".type " BODY_PREFIX #name ",@function;\n" \
- ".globl " #name ";\n" \
- ".pushsection \".opd\",\"aw\";\n" \
- ".align 3;\n" \
+ ".type " BODY_PREFIX #name ",@function\n" \
+ ".globl " #name "\n" \
+ ".pushsection \".opd\",\"aw\"\n" \
+ ".p2align 3\n" \
#name ":\n" \
OPD_ENT (name) "\n" \
- ".popsection;"
+ ".popsection"
#define DOT_PREFIX ""
#define BODY_PREFIX ".LY"
#define ENTRY_2(name) \
- ".type " #name ",@function;\n" \
+ ".type " #name ",@function\n" \
ENTRY_1(name)
#define END_2(name) \
- ".size " #name ",.-" BODY_PREFIX #name ";\n" \
- ".size " BODY_PREFIX #name ",.-" BODY_PREFIX #name ";"
+ ".size " #name ",.-" BODY_PREFIX #name "\n" \
+ ".size " BODY_PREFIX #name ",.-" BODY_PREFIX #name
#define LOCALENTRY(name)
#else /* _CALL_ELF */
#define PPC64_LOAD_FUNCPTR(ptr) \
- "mr 12," #ptr ";\n" \
- "mtctr 12;"
+ "mr 12," #ptr "\n" \
+ "mtctr 12"
#define DOT_PREFIX ""
#define BODY_PREFIX ""
#define ENTRY_2(name) \
- ".type " #name ",@function;\n" \
- ".globl " #name ";"
+ ".type " #name ",@function\n" \
+ ".globl " #name
#define END_2(name) \
- ".size " #name ",.-" #name ";"
+ ".size " #name ",.-" #name
#define LOCALENTRY(name) \
- "1: addis 2,12,.TOC.-1b@ha;\n" \
- "addi 2,2,.TOC.-1b@l;\n" \
- ".localentry " #name ",.-" #name ";"
+ "1: addis 2,12,.TOC.-1b@ha\n" \
+ "addi 2,2,.TOC.-1b@l\n" \
+ ".localentry " #name ",.-" #name
#endif /* _CALL_ELF */
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