Fix bugs in sparc PLT profiling register management, and add sparc sotruss support.

	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Protect local
	variables with appropriate CPP guards.
	* sysdeps/sparc/sparc32/dl-trampoline.S: Propagate the stack_ptr from the
	frame pointer, not the stack pointer.  Correct layout comments.  Fix test
	on resulting framesize and the management of the outregs buffer for pltexit.
	Preserve floating point return values across _dl_call_pltexit call.
	* sysdeps/sparc/sparc64/dl-trampoline.S: Fix test on resulting
	framesize and the management of the outregs buffer for pltexit.
	Preserve floating point return values across _dl_call_pltexit
	call.
	* elf/sotruss-lib.c (la_sparc32_gnu_pltenter, la_sparc64_gnu_pltenter,
	la_sparc32_gnu_pltexit, la_sparc64_gnu_pltexit): New functions.
	(print_exit): Fix format string for return register value.

2 files changed, 36 insertions, 28 deletions

diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h
index 1620ca54df..f85683d1b0 100644
--- a/sysdeps/sparc/sparc32/dl-machine.h
+++ b/sysdeps/sparc/sparc32/dl-machine.h
@@ -1,5 +1,5 @@
 /* Machine-dependent ELF dynamic relocation inline functions.  SPARC version.
-   Copyright (C) 1996-2003, 2004, 2005, 2006, 2007, 2010, 2011
+   Copyright (C) 1996-2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -341,10 +341,14 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
+#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
   const Elf32_Sym *const refsym = sym;
+#endif
   Elf32_Addr value;
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
+#if !defined RESOLVE_CONFLICT_FIND_MAP
   struct link_map *sym_map = NULL;
+#endif
 
 #if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
   /* This is defined in rtld.c, but nowhere in the static libc.a; make the
diff --git a/sysdeps/sparc/sparc32/dl-trampoline.S b/sysdeps/sparc/sparc32/dl-trampoline.S
index 79ec79fe9e..44794592aa 100644
--- a/sysdeps/sparc/sparc32/dl-trampoline.S
+++ b/sysdeps/sparc/sparc32/dl-trampoline.S
@@ -1,5 +1,5 @@
 /* PLT trampolines.  Sparc 32-bit version.
-   Copyright (C) 2005 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2012 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
@@ -48,17 +48,20 @@ _dl_runtime_resolve:
 	.size	_dl_runtime_resolve, .-_dl_runtime_resolve
 
 	/* For the profiling cases we pass in our stack frame
-	 * as the base of the La_sparc64_regs, so it looks
+	 * as the base of the La_sparc32_regs, so it looks
 	 * like:
-	 *	%l0			%sp
+	 *	%l0			%sp + (0 * 8)
+	 *	%l1			%sp + (0 * 8) + 4
 	 *	...
-	 *	%l7			%sp + (7 * 8)
-	 *	%i0			%sp + (8 * 8)
+	 *	%l6			%sp + (3 * 8)
+	 *	%l7			%sp + (3 * 8) + 4
+	 *	%i0			%sp + (4 * 8)
+	 *	%i1			%sp + (4 * 8) + 4
 	 *	...
-	 *	%i7			%sp + (15 * 8)
-	 *	%f0			%sp + (16 * 8)
-	 *	%f16			%sp + (31 * 8)
-	 *	framesize		%sp + (32 * 8)
+	 *	%i6			%sp + (7 * 8)
+	 *	%i7			%sp + (7 * 8) + 4
+	 *	struct_ret_ptr		%sp + (8 * 8)
+	 *	framesize		%sp + (9 * 8)
 	 */
 
 	.globl	_dl_profile_save_regs
@@ -74,7 +77,7 @@ _dl_profile_save_regs:
 	std	%i2, [%sp + ( 5 * 8)]
 	std	%i4, [%sp + ( 6 * 8)]
 	std	%i6, [%sp + ( 7 * 8)]
-	ld	[%sp + (8 * 8)], %l4
+	ld	[%fp + (8 * 8)], %l4
 	retl
 	 st	%l4, [%sp + (8 * 8)]
 
@@ -91,8 +94,11 @@ _dl_profile_save_regs:
 _dl_profile_invoke:
 	cfi_startproc
 
-	sub	%sp, %l0, %sp
-1:
+	add	%l0, 7, %l0
+	andn	%l0, 7, %l0
+	add	%l0, 2 * 8, %g1
+
+	sub	%sp, %g1, %sp
 	srl	%l0, 3, %l7
 	mov	%o0, %l1
 	mov	%i0, %o0
@@ -101,8 +107,10 @@ _dl_profile_invoke:
 	mov	%i3, %o3
 	mov	%i4, %o4
 	mov	%i5, %o5
+	cmp	%l0, 0
 	mov	%fp, %l2
-	mov	%sp, %l3
+	be	2f
+	 add	%sp, (11 * 8), %l3
 1:	ldd	[%l2], %g2
 	add	%l2, 0x8, %l2
 	subcc	%l7, 1, %l7
@@ -110,7 +118,7 @@ _dl_profile_invoke:
 	bne	1b
 	 add	%l3, 0x8, %l3
 
-	jmpl	%l1, %o7
+2:	jmpl	%l1, %o7
 	 nop
 
 	std	%o0, [%sp + ( 9 * 8)]
@@ -118,11 +126,12 @@ _dl_profile_invoke:
 
 	mov	%l5, %o0
 	mov	%l6, %o1
-	add	%sp, %l0, %o2
+	add	%sp, (11 * 8), %o2
 	call	_dl_call_pltexit
-	 add	%sp, (16 * 8), %o3
+	 add	%sp, ( 9 * 8), %o3
 
-	ldd	[%sp + (9 * 8)], %i0
+	ldd	[%sp + ( 9 * 8)], %i0
+	ldd	[%sp + (10 * 8)], %f0
 
 	jmpl	%i7 + 8, %g0
 	 restore
@@ -142,11 +151,7 @@ _dl_profile_invoke:
 _dl_runtime_profile:
 	cfi_startproc
 
-	cmp	%fp, 0
-	be,a	1f
-	 mov	104, %g3
-	sub	%fp, %sp, %g3
-1:	save	%sp, -104, %sp
+	save	%sp, -104, %sp
 	cfi_def_cfa_register(%fp)
 	cfi_window_save
 	cfi_register(%o7, %i7)
@@ -156,20 +161,19 @@ _dl_runtime_profile:
 	mov	%i7, %o2
 	sub	%o1, 4*12, %o1
 
-	mov	%g3, %l0
 	mov	%o0, %l5
 	mov	%o1, %l6
 
-	call _dl_profile_save_regs
+	call	_dl_profile_save_regs
 	 nop
 
 	mov	%sp, %o3
 	call	_dl_profile_fixup
 	 add	%sp, (9 * 8), %o4
 
-	ld	[%sp + (9 * 8)], %o1
-	cmp	%o1, 0
-	bgeu	1f
+	ld	[%sp + (9 * 8)], %l0
+	cmp	%l0, 0
+	bl	1f
 	 nop
 	
 	call	_dl_profile_invoke