Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 197 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/elf.h b/arch/powerpc/include/asm/elf.h
new file mode 100644
index 0000000000..79f1c480b5
--- /dev/null
+++ b/arch/powerpc/include/asm/elf.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * ELF register definitions..
+ */
+#ifndef _ASM_POWERPC_ELF_H
+#define _ASM_POWERPC_ELF_H
+
+#include <linux/sched.h>	/* for task_struct */
+#include <asm/page.h>
+#include <asm/string.h>
+#include <uapi/asm/elf.h>
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
+#define compat_elf_check_arch(x)	((x)->e_machine == EM_PPC)
+
+#define CORE_DUMP_USE_REGSET
+#define ELF_EXEC_PAGESIZE	PAGE_SIZE
+
+/*
+ * This is the base location for PIE (ET_DYN with INTERP) loads. On
+ * 64-bit, this is raised to 4GB to leave the entire 32-bit address
+ * space open for things that want to use the area for 32-bit pointers.
+ */
+#define ELF_ET_DYN_BASE		(is_32bit_task() ? 0x000400000UL : \
+						   0x100000000UL)
+
+#define ELF_CORE_EFLAGS (is_elf2_task() ? 2 : 0)
+
+/*
+ * Our registers are always unsigned longs, whether we're a 32 bit
+ * process or 64 bit, on either a 64 bit or 32 bit kernel.
+ *
+ * This macro relies on elf_regs[i] having the right type to truncate to,
+ * either u32 or u64.  It defines the body of the elf_core_copy_regs
+ * function, either the native one with elf_gregset_t elf_regs or
+ * the 32-bit one with elf_gregset_t32 elf_regs.
+ */
+#define PPC_ELF_CORE_COPY_REGS(elf_regs, regs) \
+	int i, nregs = min(sizeof(*regs) / sizeof(unsigned long), \
+			   (size_t)ELF_NGREG);			  \
+	for (i = 0; i < nregs; i++) \
+		elf_regs[i] = ((unsigned long *) regs)[i]; \
+	memset(&elf_regs[i], 0, (ELF_NGREG - i) * sizeof(elf_regs[0]))
+
+/* Common routine for both 32-bit and 64-bit native processes */
+static inline void ppc_elf_core_copy_regs(elf_gregset_t elf_regs,
+					  struct pt_regs *regs)
+{
+	PPC_ELF_CORE_COPY_REGS(elf_regs, regs);
+}
+#define ELF_CORE_COPY_REGS(gregs, regs) ppc_elf_core_copy_regs(gregs, regs);
+
+/* ELF_HWCAP yields a mask that user programs can use to figure out what
+   instruction set this cpu supports.  This could be done in userspace,
+   but it's not easy, and we've already done it here.  */
+# define ELF_HWCAP	(cur_cpu_spec->cpu_user_features)
+# define ELF_HWCAP2	(cur_cpu_spec->cpu_user_features2)
+
+/* This yields a string that ld.so will use to load implementation
+   specific libraries for optimization.  This is more specific in
+   intent than poking at uname or /proc/cpuinfo.  */
+
+#define ELF_PLATFORM	(cur_cpu_spec->platform)
+
+/* While ELF_PLATFORM indicates the ISA supported by the platform, it
+ * may not accurately reflect the underlying behavior of the hardware
+ * (as in the case of running in Power5+ compatibility mode on a
+ * Power6 machine).  ELF_BASE_PLATFORM allows ld.so to load libraries
+ * that are tuned for the real hardware.
+ */
+#define ELF_BASE_PLATFORM (powerpc_base_platform)
+
+#ifdef __powerpc64__
+# define ELF_PLAT_INIT(_r, load_addr)	do {	\
+	_r->gpr[2] = load_addr; 		\
+} while (0)
+#endif /* __powerpc64__ */
+
+#ifdef __powerpc64__
+# define SET_PERSONALITY(ex)					\
+do {								\
+	if (((ex).e_flags & 0x3) == 2)				\
+		set_thread_flag(TIF_ELF2ABI);			\
+	else							\
+		clear_thread_flag(TIF_ELF2ABI);			\
+	if ((ex).e_ident[EI_CLASS] == ELFCLASS32)		\
+		set_thread_flag(TIF_32BIT);			\
+	else							\
+		clear_thread_flag(TIF_32BIT);			\
+	if (personality(current->personality) != PER_LINUX32)	\
+		set_personality(PER_LINUX |			\
+			(current->personality & (~PER_MASK)));	\
+} while (0)
+/*
+ * An executable for which elf_read_implies_exec() returns TRUE will
+ * have the READ_IMPLIES_EXEC personality flag set automatically. This
+ * is only required to work around bugs in old 32bit toolchains. Since
+ * the 64bit ABI has never had these issues dont enable the workaround
+ * even if we have an executable stack.
+ */
+# define elf_read_implies_exec(ex, exec_stk) (is_32bit_task() ? \
+		(exec_stk == EXSTACK_DEFAULT) : 0)
+#else 
+# define elf_read_implies_exec(ex, exec_stk) (exec_stk == EXSTACK_DEFAULT)
+#endif /* __powerpc64__ */
+
+extern int dcache_bsize;
+extern int icache_bsize;
+extern int ucache_bsize;
+
+/* vDSO has arch_setup_additional_pages */
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+				       int uses_interp);
+#define VDSO_AUX_ENT(a,b) NEW_AUX_ENT(a,b)
+
+/* 1GB for 64bit, 8MB for 32bit */
+#define STACK_RND_MASK (is_32bit_task() ? \
+	(0x7ff >> (PAGE_SHIFT - 12)) : \
+	(0x3ffff >> (PAGE_SHIFT - 12)))
+
+#ifdef CONFIG_SPU_BASE
+/* Notes used in ET_CORE. Note name is "SPU/<fd>/<filename>". */
+#define NT_SPU		1
+
+#define ARCH_HAVE_EXTRA_ELF_NOTES
+
+#endif /* CONFIG_SPU_BASE */
+
+#ifdef CONFIG_PPC64
+
+#define get_cache_geometry(level) \
+	(ppc64_caches.level.assoc << 16 | ppc64_caches.level.line_size)
+
+#define ARCH_DLINFO_CACHE_GEOMETRY					\
+	NEW_AUX_ENT(AT_L1I_CACHESIZE, ppc64_caches.l1i.size);		\
+	NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, get_cache_geometry(l1i));	\
+	NEW_AUX_ENT(AT_L1D_CACHESIZE, ppc64_caches.l1d.size);		\
+	NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, get_cache_geometry(l1d));	\
+	NEW_AUX_ENT(AT_L2_CACHESIZE, ppc64_caches.l2.size);		\
+	NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, get_cache_geometry(l2));	\
+	NEW_AUX_ENT(AT_L3_CACHESIZE, ppc64_caches.l3.size);		\
+	NEW_AUX_ENT(AT_L3_CACHEGEOMETRY, get_cache_geometry(l3))
+
+#else
+#define ARCH_DLINFO_CACHE_GEOMETRY
+#endif
+
+/*
+ * The requirements here are:
+ * - keep the final alignment of sp (sp & 0xf)
+ * - make sure the 32-bit value at the first 16 byte aligned position of
+ *   AUXV is greater than 16 for glibc compatibility.
+ *   AT_IGNOREPPC is used for that.
+ * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
+ *   even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
+ * update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes
+ */
+#define COMMON_ARCH_DLINFO						\
+do {									\
+	/* Handle glibc compatibility. */				\
+	NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);			\
+	NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);			\
+	/* Cache size items */						\
+	NEW_AUX_ENT(AT_DCACHEBSIZE, dcache_bsize);			\
+	NEW_AUX_ENT(AT_ICACHEBSIZE, icache_bsize);			\
+	NEW_AUX_ENT(AT_UCACHEBSIZE, 0);					\
+	VDSO_AUX_ENT(AT_SYSINFO_EHDR, (unsigned long)current->mm->context.vdso);\
+	ARCH_DLINFO_CACHE_GEOMETRY;					\
+} while (0)
+
+#define ARCH_DLINFO							\
+do {									\
+	COMMON_ARCH_DLINFO;						\
+	NEW_AUX_ENT(AT_MINSIGSTKSZ, get_min_sigframe_size());		\
+} while (0)
+
+#define COMPAT_ARCH_DLINFO						\
+do {									\
+	COMMON_ARCH_DLINFO;						\
+	NEW_AUX_ENT(AT_MINSIGSTKSZ, get_min_sigframe_size_compat());	\
+} while (0)
+
+/* Relocate the kernel image to @final_address */
+void relocate(unsigned long final_address);
+
+struct func_desc {
+	unsigned long addr;
+	unsigned long toc;
+	unsigned long env;
+};
+
+#endif /* _ASM_POWERPC_ELF_H */