[PATCH] FDPIC: Add coredump capability for the ELF-FDPIC binfmt

Add coredump capability for the ELF-FDPIC binfmt.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/frv/kernel/process.c

@@ -371,3 +371,11 @@ int elf_check_arch(const struct elf32_hdr *hdr)
 
 	return 1;
 }
+
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
+{
+	memcpy(fpregs,
+	       &current->thread.user->f,
+	       sizeof(current->thread.user->f));
+	return 1;
+}

include/asm-frv/elf.h

@@ -64,7 +64,7 @@ typedef unsigned long elf_greg_t;
 #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 
-typedef struct fpmedia_struct elf_fpregset_t;
+typedef struct user_fpmedia_regs elf_fpregset_t;
 
 /*
  * This is used to ensure we don't load something for the wrong architecture.
@@ -116,6 +116,7 @@ do {											\
 } while(0)
 
 #define USE_ELF_CORE_DUMP
+#define ELF_FDPIC_CORE_EFLAGS	EF_FRV_FDPIC
 #define ELF_EXEC_PAGESIZE	16384
 
 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
@@ -125,9 +126,6 @@ do {											\
 
 #define ELF_ET_DYN_BASE         0x08000000UL
 
-#define ELF_CORE_COPY_REGS(pr_reg, regs)				\
-	memcpy(&pr_reg[0], &regs->sp, 31 * sizeof(uint32_t));
-
 /* This yields a mask that user programs can use to figure out what
    instruction set this cpu supports.  */
 

include/linux/elfcore.h

@@ -60,6 +60,16 @@ struct elf_prstatus
 	long	pr_instr;		/* Current instruction */
 #endif
 	elf_gregset_t pr_reg;	/* GP registers */
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+	/* When using FDPIC, the loadmap addresses need to be communicated
+	 * to GDB in order for GDB to do the necessary relocations.  The
+	 * fields (below) used to communicate this information are placed
+	 * immediately after ``pr_reg'', so that the loadmap addresses may
+	 * be viewed as part of the register set if so desired.
+	 */
+	unsigned long pr_exec_fdpic_loadmap;
+	unsigned long pr_interp_fdpic_loadmap;
+#endif
 	int pr_fpvalid;		/* True if math co-processor being used.  */
 };