We're approaching 20 locations where we need to check for ELF ABI v2.
That's fine, except the logic is a bit awkward, because we have to check
that _CALL_ELF is defined and then what its value is.
So check it once in asm/types.h and define PPC64_ELF_ABI_v2 when ELF ABI
v2 is detected.
We also have a few places where what we're really trying to check is
that we are using the 64-bit v1 ABI, ie. function descriptors. So also
add a #define for that, which simplifies several checks.
We don't add explicit includes of asm/types.h because it's included
basically everywhere via compiler.h.
Signed-off-by: Naveen N. Rao <naveen.n....@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/include/asm/code-patching.h | 10 ++++------
arch/powerpc/include/asm/ftrace.h | 6 +++---
arch/powerpc/include/asm/kprobes.h | 8 +++-----
arch/powerpc/include/asm/linkage.h | 4 +---
arch/powerpc/include/asm/ppc_asm.h | 4 ++--
arch/powerpc/include/asm/ptrace.h | 2 +-
arch/powerpc/include/asm/sections.h | 4 ++--
arch/powerpc/include/asm/types.h | 8 ++++++++
arch/powerpc/kernel/entry_64.S | 2 +-
arch/powerpc/kernel/ftrace.c | 4 ++--
arch/powerpc/kernel/head_64.S | 2 +-
arch/powerpc/kernel/kprobes.c | 6 ++----
arch/powerpc/kernel/misc_64.S | 2 +-
arch/powerpc/kernel/module_64.c | 4 ++--
arch/powerpc/kvm/book3s_interrupts.S | 2 +-
arch/powerpc/kvm/book3s_rmhandlers.S | 2 +-
16 files changed, 35 insertions(+), 35 deletions(-)
v3 (mpe):
- Added PPC64_ELF_ABI_v1
- Cleaned up a few more duplicate checks now that CONFIG_PPC64 is implied.
v2 (Naveen):
- included __powerpc64__ in the check for setting the flag since ABIv2
is ppc64 specific.
- renamed flag to PPC64_ELF_ABI_v2 to convey the same.
- fixed the incorrect change in ftrace.h
- converted an additional change in ftrace.c
diff --git a/arch/powerpc/include/asm/code-patching.h
b/arch/powerpc/include/asm/code-patching.h
index 994c60a857ce..2015b072422c 100644
--- a/arch/powerpc/include/asm/code-patching.h
+++ b/arch/powerpc/include/asm/code-patching.h
@@ -49,8 +49,7 @@ void __patch_exception(int exc, unsigned long addr);
static inline unsigned long ppc_function_entry(void *func)
{
-#if defined(CONFIG_PPC64)
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
u32 *insn = func;
/*
@@ -75,14 +74,13 @@ static inline unsigned long ppc_function_entry(void *func)
return (unsigned long)(insn + 2);
else
return (unsigned long)func;
-#else
+#elif defined(PPC64_ELF_ABI_v1)
/*
* On PPC64 ABIv1 the function pointer actually points to the
* function's descriptor. The first entry in the descriptor is the
* address of the function text.
*/
return ((func_descr_t *)func)->entry;
-#endif
#else
return (unsigned long)func;
#endif
@@ -90,7 +88,7 @@ static inline unsigned long ppc_function_entry(void *func)
static inline unsigned long ppc_global_function_entry(void *func)
{
-#if defined(CONFIG_PPC64) && defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
/* PPC64 ABIv2 the global entry point is at the address */
return (unsigned long)func;
#else
@@ -106,7 +104,7 @@ static inline unsigned long ppc_global_function_entry(void
*func)
*/
/* This must match the definition of STK_GOT in <asm/ppc_asm.h> */
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define R2_STACK_OFFSET 24
#else
#define R2_STACK_OFFSET 40
diff --git a/arch/powerpc/include/asm/ftrace.h
b/arch/powerpc/include/asm/ftrace.h
index 50ca7585abe2..f717cfc0b62f 100644
--- a/arch/powerpc/include/asm/ftrace.h
+++ b/arch/powerpc/include/asm/ftrace.h
@@ -65,8 +65,8 @@ struct dyn_arch_ftrace {
#endif
#endif
-#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_PPC64) &&
!defined(__ASSEMBLY__)
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#if defined(CONFIG_FTRACE_SYSCALLS) && !defined(__ASSEMBLY__)
+#ifdef PPC64_ELF_ABI_v1
#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
static inline bool arch_syscall_match_sym_name(const char *sym, const char
*name)
{
@@ -79,6 +79,6 @@ static inline bool arch_syscall_match_sym_name(const char
*sym, const char *name
return !strcmp(sym + 4, name + 3);
}
#endif
-#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 && !__ASSEMBLY__ */
+#endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */
#endif /* _ASM_POWERPC_FTRACE */
diff --git a/arch/powerpc/include/asm/kprobes.h
b/arch/powerpc/include/asm/kprobes.h
index 039b583db029..2c9759bdb63b 100644
--- a/arch/powerpc/include/asm/kprobes.h
+++ b/arch/powerpc/include/asm/kprobes.h
@@ -40,8 +40,7 @@ struct kprobe;
typedef ppc_opcode_t kprobe_opcode_t;
#define MAX_INSN_SIZE 1
-#ifdef CONFIG_PPC64
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
/* PPC64 ABIv2 needs local entry point */
#define kprobe_lookup_name(name, addr) \
{ \
@@ -49,7 +48,7 @@ typedef ppc_opcode_t kprobe_opcode_t;
if (addr) \
addr = (kprobe_opcode_t *)ppc_function_entry(addr); \
}
-#else
+#elif defined(PPC64_ELF_ABI_v1)
/*
* 64bit powerpc ABIv1 uses function descriptors:
* - Check for the dot variant of the symbol first.
@@ -92,8 +91,7 @@ typedef ppc_opcode_t kprobe_opcode_t;
addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); \
} \
}
-#endif /* defined(_CALL_ELF) && _CALL_ELF == 2 */
-#endif /* CONFIG_PPC64 */
+#endif
#define flush_insn_slot(p) do { } while (0)
#define kretprobe_blacklist_size 0
diff --git a/arch/powerpc/include/asm/linkage.h
b/arch/powerpc/include/asm/linkage.h
index e3ad5c72724a..98c3e2d3a739 100644
--- a/arch/powerpc/include/asm/linkage.h
+++ b/arch/powerpc/include/asm/linkage.h
@@ -1,8 +1,7 @@
#ifndef _ASM_POWERPC_LINKAGE_H
#define _ASM_POWERPC_LINKAGE_H
-#ifdef CONFIG_PPC64
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#ifdef PPC64_ELF_ABI_v1
#define cond_syscall(x) \
asm ("\t.weak " #x "\n\t.set " #x ", sys_ni_syscall\n" \
"\t.weak ." #x "\n\t.set ." #x ", .sys_ni_syscall\n")
@@ -10,6 +9,5 @@
asm ("\t.globl " #alias "\n\t.set " #alias ", " #name "\n" \
"\t.globl ." #alias "\n\t.set ." #alias ", ." #name)
#endif
-#endif
#endif /* _ASM_POWERPC_LINKAGE_H */
diff --git a/arch/powerpc/include/asm/ppc_asm.h
b/arch/powerpc/include/asm/ppc_asm.h
index 2b31632376a5..7b591f98edcc 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -189,7 +189,7 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
#define __STK_REG(i) (112 + ((i)-14)*8)
#define STK_REG(i) __STK_REG(__REG_##i)
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define STK_GOT 24
#define __STK_PARAM(i) (32 + ((i)-3)*8)
#else
@@ -198,7 +198,7 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
#endif
#define STK_PARAM(i) __STK_PARAM(__REG_##i)
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define _GLOBAL(name) \
.section ".text"; \
diff --git a/arch/powerpc/include/asm/ptrace.h
b/arch/powerpc/include/asm/ptrace.h
index c0c61fa9cd9e..e4923686e43a 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -47,7 +47,7 @@
STACK_FRAME_OVERHEAD + KERNEL_REDZONE_SIZE)
#define STACK_FRAME_MARKER 12
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define STACK_FRAME_MIN_SIZE 32
#else
#define STACK_FRAME_MIN_SIZE STACK_FRAME_OVERHEAD
diff --git a/arch/powerpc/include/asm/sections.h
b/arch/powerpc/include/asm/sections.h
index abf5866e08c6..7dc006b58369 100644
--- a/arch/powerpc/include/asm/sections.h
+++ b/arch/powerpc/include/asm/sections.h
@@ -62,7 +62,7 @@ static inline int overlaps_kvm_tmp(unsigned long start,
unsigned long end)
#endif
}
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#ifdef PPC64_ELF_ABI_v1
#undef dereference_function_descriptor
static inline void *dereference_function_descriptor(void *ptr)
{
@@ -73,7 +73,7 @@ static inline void *dereference_function_descriptor(void *ptr)
ptr = p;
return ptr;
}
-#endif
+#endif /* PPC64_ELF_ABI_v1 */
#endif
diff --git a/arch/powerpc/include/asm/types.h b/arch/powerpc/include/asm/types.h
index bfb6ded38ffa..49a0678a53fa 100644
--- a/arch/powerpc/include/asm/types.h
+++ b/arch/powerpc/include/asm/types.h
@@ -15,6 +15,14 @@
#include <uapi/asm/types.h>
+#ifdef __powerpc64__
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+#define PPC64_ELF_ABI_v2
+#else
+#define PPC64_ELF_ABI_v1
+#endif
+#endif /* __powerpc64__ */
+
#ifndef __ASSEMBLY__
typedef __vector128 vector128;
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 73e461a3dfbb..2e0c565754aa 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -453,7 +453,7 @@ _GLOBAL(ret_from_kernel_thread)
REST_NVGPRS(r1)
mtlr r14
mr r3,r15
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
mr r12,r14
#endif
blrl
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index 1123a4d8d8dd..7af6c4de044b 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -608,7 +608,7 @@ unsigned long __init arch_syscall_addr(int nr)
}
#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 */
-#if defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF != 2)
+#ifdef PPC64_ELF_ABI_v1
char *arch_ftrace_match_adjust(char *str, const char *search)
{
if (str[0] == '.' && search[0] != '.')
@@ -616,4 +616,4 @@ char *arch_ftrace_match_adjust(char *str, const char
*search)
else
return str;
}
-#endif /* defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF != 2) */
+#endif /* PPC64_ELF_ABI_v1 */
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 2d14774af6b4..064cd9397836 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -401,7 +401,7 @@ generic_secondary_common_init:
ld r12,CPU_SPEC_RESTORE(r23)
cmpdi 0,r12,0
beq 3f
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#ifdef PPC64_ELF_ABI_v1
ld r12,0(r12)
#endif
mtctr r12
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 7c053f281406..7d48e3baa38b 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -506,13 +506,11 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct
pt_regs *regs)
/* setup return addr to the jprobe handler routine */
regs->nip = arch_deref_entry_point(jp->entry);
-#ifdef CONFIG_PPC64
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
regs->gpr[12] = (unsigned long)jp->entry;
-#else
+#elif defined(PPC64_ELF_ABI_v1)
regs->gpr[2] = (unsigned long)(((func_descr_t *)jp->entry)->toc);
#endif
-#endif
return 1;
}
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index f28754c497e5..7a8519052b14 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -661,7 +661,7 @@ _GLOBAL(kexec_sequence)
#ifndef CONFIG_PPC_BOOK3E
/* clear out hardware hash page table and tlb */
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#ifdef PPC64_ELF_ABI_v1
ld r12,0(r27) /* deref function descriptor */
#else
mr r12,r27
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 9ce9a25f58b5..f703f343358e 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -41,7 +41,7 @@
this, and makes other things simpler. Anton?
--RR. */
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
/* An address is simply the address of the function. */
typedef unsigned long func_desc_t;
@@ -132,7 +132,7 @@ static u32 ppc64_stub_insns[] = {
/* Save current r2 value in magic place on the stack. */
0xf8410000|R2_STACK_OFFSET, /* std r2,R2_STACK_OFFSET(r1) */
0xe98b0020, /* ld r12,32(r11) */
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#ifdef PPC64_ELF_ABI_v1
/* Set up new r2 from function descriptor */
0xe84b0028, /* ld r2,40(r11) */
#endif
diff --git a/arch/powerpc/kvm/book3s_interrupts.S
b/arch/powerpc/kvm/book3s_interrupts.S
index d044b8b7c69d..901e6fe00c39 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -25,7 +25,7 @@
#include <asm/exception-64s.h>
#if defined(CONFIG_PPC_BOOK3S_64)
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define FUNC(name) name
#else
#define FUNC(name) GLUE(.,name)
diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S
b/arch/powerpc/kvm/book3s_rmhandlers.S
index 16c4d88ba27d..42a4b237df5f 100644
--- a/arch/powerpc/kvm/book3s_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_rmhandlers.S
@@ -36,7 +36,7 @@
#if defined(CONFIG_PPC_BOOK3S_64)
-#if defined(_CALL_ELF) && _CALL_ELF == 2
+#ifdef PPC64_ELF_ABI_v2
#define FUNC(name) name
#else
#define FUNC(name) GLUE(.,name)
--
2.5.0
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