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.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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;
/*
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
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
*/
/* 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
#ifndef _ASM_POWERPC_FTRACE
#define _ASM_POWERPC_FTRACE
+#include <asm/types.h>
+
#ifdef CONFIG_FUNCTION_TRACER
#define MCOUNT_ADDR ((unsigned long)(_mcount))
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
#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)
{
return !strcmp(sym + 4, name + 3);
}
#endif
-#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 && !__ASSEMBLY__ */
+#endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */
#endif /* _ASM_POWERPC_FTRACE */
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) \
{ \
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.
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
#ifndef _ASM_POWERPC_LINKAGE_H
#define _ASM_POWERPC_LINKAGE_H
-#ifdef CONFIG_PPC64
-#if !defined(_CALL_ELF) || _CALL_ELF != 2
+#include <asm/types.h>
+
+#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")
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 */
#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
#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"; \
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
#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)
{
ptr = p;
return ptr;
}
-#endif
+#endif /* PPC64_ELF_ABI_v1 */
#endif
#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;
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
}
#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] != '.')
else
return str;
}
-#endif /* defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF != 2) */
+#endif /* PPC64_ELF_ABI_v1 */
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
/* 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;
}
#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
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;
/* 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
#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)
#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)