From 26165906f85d82f0a4456f34b5c60fcaaef48535 Mon Sep 17 00:00:00 2001
From: Romain Naour <romain.naour@smile.fr>
Date: Wed, 5 Feb 2020 10:31:32 +0100
Subject: [PATCH] elf2flt: handle binutils >= 2.34

The latest Binutils release (2.34) is not compatible with elf2flt due
to a change in bfd_section_* macros [1]. The issue has been reported
to the Binutils mailing list but Alan Modra recommend to bundle
libbfd library sources into each projects using it [2]. That's
because the API is not stable over the time without any backward
compatibility guaranties.

On the other hand, the elf2flt tools needs to support modified
version of binutils for specific arch/target [3].

Add two tests in the configure script to detect this API change
in order to support binutils < 2.34 and binutils >= 2.34.

Upstream status: [4]

[1] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=fd3619828e94a24a92cddec42cbc0ab33352eeb4
[2] https://sourceware.org/ml/binutils/2020-02/msg00044.html
[3] https://github.com/uclinux-dev/elf2flt/issues/14
[4] https://github.com/uclinux-dev/elf2flt/pull/15

Signed-off-by: Romain Naour <romain.naour@smile.fr>
---
 configure.ac | 16 +++++++++++
 elf2flt.c    | 81 +++++++++++++++++++++++++++++-----------------------
 2 files changed, 61 insertions(+), 36 deletions(-)

diff --git a/configure.ac b/configure.ac
index e82eb1d..cf7dea8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -229,6 +229,22 @@ AC_CHECK_FUNCS([ \
 	strsignal \
 ])
 
+dnl Various bfd section macros and functions like bfd_section_size() have been
+dnl modified starting with binutils >= 2.34.
+dnl Check if the prototypes take a bfd argument.
+if test "$binutils_build_dir" != "NONE"; then
+    CFLAGS="-I$binutils_include_dir -I$bfd_include_dir $CFLAGS"
+fi
+
+AC_TRY_COMPILE([#include <bfd.h>],
+ [const asection *sec; bfd_section_size(sec);],
+ bfd_section_api_takes_bfd=no,
+ bfd_section_api_takes_bfd=yes)
+if test "$bfd_section_api_takes_bfd" = "yes" ; then
+  AC_DEFINE(HAVE_BFD_SECTION_API_TAKES_BFD, 1,
+   [define to 1 for binutils < 2.34])
+fi
+
 if test "$GCC" = yes ; then
 	CFLAGS="-Wall $CFLAGS"
 	if test "$werror" = 1 ; then
diff --git a/elf2flt.c b/elf2flt.c
index b93aecd..3bcf4fe 100644
--- a/elf2flt.c
+++ b/elf2flt.c
@@ -149,6 +149,17 @@ const char *elf2flt_progname;
 #define O_BINARY 0
 #endif
 
+/*
+ * The bfd parameter isn't actually used by any of the bfd_section funcs and
+ * have been removed since binutils 2.34.
+ */
+#ifdef HAVE_BFD_SECTION_API_TAKES_BFD
+#define elf2flt_bfd_section_size(s) bfd_section_size(NULL, s)
+#define elf2flt_bfd_section_vma(s)  bfd_section_vma(NULL, s)
+#else
+#define elf2flt_bfd_section_size(s) bfd_section_size(s)
+#define elf2flt_bfd_section_vma(s)  bfd_section_vma(s)
+#endif
 
 /* Extra output when running.  */
 static int verbose = 0;
@@ -323,10 +334,8 @@ compare_relocs (const void *pa, const void *pb)
 	else if (!rb->sym_ptr_ptr || !*rb->sym_ptr_ptr)
 		return 1;
 
-	a_vma = bfd_section_vma(compare_relocs_bfd,
-				(*(ra->sym_ptr_ptr))->section);
-	b_vma = bfd_section_vma(compare_relocs_bfd,
-				(*(rb->sym_ptr_ptr))->section);
+	a_vma = elf2flt_bfd_section_vma((*(ra->sym_ptr_ptr))->section);
+	b_vma = elf2flt_bfd_section_vma((*(rb->sym_ptr_ptr))->section);
 	va = (*(ra->sym_ptr_ptr))->value + a_vma + ra->addend;
 	vb = (*(rb->sym_ptr_ptr))->value + b_vma + rb->addend;
 	return va - vb;
@@ -403,7 +412,7 @@ output_relocs (
   }
 
   for (a = abs_bfd->sections; (a != (asection *) NULL); a = a->next) {
-  	section_vma = bfd_section_vma(abs_bfd, a);
+	section_vma = elf2flt_bfd_section_vma(a);
 
 	if (verbose)
 		printf("SECTION: %s [%p]: flags=0x%x vma=0x%"PRIx32"\n",
@@ -442,7 +451,7 @@ output_relocs (
 	  continue;
 	if (verbose)
 	  printf(" RELOCS: %s [%p]: flags=0x%x vma=0x%"BFD_VMA_FMT"x\n",
-			r->name, r, r->flags, bfd_section_vma(abs_bfd, r));
+			r->name, r, r->flags, elf2flt_bfd_section_vma(r));
   	if ((r->flags & SEC_RELOC) == 0)
   	  continue;
 	relsize = bfd_get_reloc_upper_bound(rel_bfd, r);
@@ -694,7 +703,7 @@ output_relocs (
 				case R_BFIN_RIMM16:
 				case R_BFIN_LUIMM16:
 				case R_BFIN_HUIMM16:
-				    sym_vma = bfd_section_vma(abs_bfd, sym_section);
+				    sym_vma = elf2flt_bfd_section_vma(sym_section);
 				    sym_addr += sym_vma + q->addend;
 
 				    if (weak_und_symbol(sym_section->name, (*(q->sym_ptr_ptr))))
@@ -727,7 +736,7 @@ output_relocs (
 				    break;
 
 				case R_BFIN_BYTE4_DATA:
-				    sym_vma = bfd_section_vma(abs_bfd, sym_section);
+				    sym_vma = elf2flt_bfd_section_vma(sym_section);
 				    sym_addr += sym_vma + q->addend;
 
 				    if (weak_und_symbol (sym_section->name, (*(q->sym_ptr_ptr))))
@@ -885,7 +894,7 @@ output_relocs (
 #if defined(TARGET_m68k)
 				case R_68K_32:
 					relocation_needed = 1;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_68K_PC16:
@@ -910,7 +919,7 @@ output_relocs (
 							q->address, sym_addr,
 							(*p)->howto->rightshift,
 							*(uint32_t *)r_mem);
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_ARM_GOT32:
@@ -938,7 +947,7 @@ output_relocs (
 #ifdef TARGET_v850
 				case R_V850_ABS32:
 					relocation_needed = 1;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_V850_ZDA_16_16_OFFSET:
@@ -960,7 +969,7 @@ output_relocs (
 					sym_addr = (*(q->sym_ptr_ptr))->value;
 					q->address -= 1;
 					r_mem -= 1; /* tracks q->address */
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					sym_addr |= (*(unsigned char *)r_mem<<24);
 					break;
@@ -973,7 +982,7 @@ output_relocs (
 					/* Absolute symbol done not relocation */
 					relocation_needed = !bfd_is_abs_section(sym_section);
 					sym_addr = (*(q->sym_ptr_ptr))->value;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_H8_DIR32:
@@ -986,7 +995,7 @@ output_relocs (
 					}
 					relocation_needed = 1;
 					sym_addr = (*(q->sym_ptr_ptr))->value;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_H8_PCREL16:
@@ -1012,7 +1021,7 @@ output_relocs (
 #ifdef TARGET_microblaze
 				case R_MICROBLAZE_64:
 					/* work out the relocation */
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					/* Write relocated pointer back */
 					r_mem[2] = (sym_addr >> 24) & 0xff;
@@ -1026,7 +1035,7 @@ output_relocs (
 					pflags = 0x80000000;
 					break;
 				case R_MICROBLAZE_32:
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					relocation_needed = 1;
 					break;
@@ -1058,7 +1067,7 @@ output_relocs (
 				case R_NIOS2_BFD_RELOC_32:
 					relocation_needed = 1;
 					pflags = (FLAT_NIOS2_R_32 << 28);
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					/* modify target, in target order */
 					*(unsigned long *)r_mem = htoniosl(sym_addr);
@@ -1068,7 +1077,7 @@ output_relocs (
 					unsigned long exist_val;
 					relocation_needed = 1;
 					pflags = (FLAT_NIOS2_R_CALL26 << 28);
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					
 					/* modify target, in target order */
@@ -1099,7 +1108,7 @@ output_relocs (
 								? FLAT_NIOS2_R_HIADJ_LO : FLAT_NIOS2_R_HI_LO;
 							pflags <<= 28;
 						
-							sym_vma = bfd_section_vma(abs_bfd, sym_section);
+							sym_vma = elf2flt_bfd_section_vma(sym_section);
 							sym_addr += sym_vma + q->addend;
 
 							/* modify high 16 bits, in target order */
@@ -1132,7 +1141,7 @@ output_relocs (
 						goto NIOS2_RELOC_ERR;
 					}
 					/* _gp holds a absolute value, otherwise the ld cannot generate correct code */
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					//printf("sym=%x, %d, _gp=%x, %d\n", sym_addr+sym_vma, sym_addr+sym_vma, gp, gp);
 					sym_addr += sym_vma + q->addend;
 					sym_addr -= gp;
@@ -1213,7 +1222,7 @@ NIOS2_RELOC_ERR:
 				case R_SPARC_32:
 				case R_SPARC_UA32:
 					relocation_needed = 1;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_SPARC_PC22:
@@ -1232,7 +1241,7 @@ NIOS2_RELOC_ERR:
 				case R_SPARC_HI22:
 					relocation_needed = 1;
 					pflags = 0x80000000;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					sym_addr |= (
 						htonl(*(uint32_t *)r_mem)
@@ -1242,7 +1251,7 @@ NIOS2_RELOC_ERR:
 				case R_SPARC_LO10:
 					relocation_needed = 1;
 					pflags = 0x40000000;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					sym_addr &= 0x000003ff;
 					sym_addr |= (
@@ -1256,7 +1265,7 @@ NIOS2_RELOC_ERR:
 #ifdef TARGET_sh
 				case R_SH_DIR32:
 					relocation_needed = 1;
-					sym_vma = bfd_section_vma(abs_bfd, sym_section);
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
 					sym_addr += sym_vma + q->addend;
 					break;
 				case R_SH_REL32:
@@ -1288,7 +1297,7 @@ NIOS2_RELOC_ERR:
 				case R_E1_CONST31:
 						relocation_needed = 1;
 						DBG_E1("Handling Reloc <CONST31>\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x], q->address : [0x%x]\n",
 										sec_vma, sym_addr, q->address);
 						sym_addr = sec_vma + sym_addr;
@@ -1303,7 +1312,7 @@ NIOS2_RELOC_ERR:
 						relocation_needed = 0;
 						DBG_E1("Handling Reloc <CONST31_PCREL>\n");
 						DBG_E1("DONT RELOCATE AT LOADING\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x], q->address : [0x%x]\n",
 										sec_vma, sym_addr, q->address);
 						sym_addr =  sec_vma + sym_addr;
@@ -1330,7 +1339,7 @@ NIOS2_RELOC_ERR:
 						relocation_needed = 0;
 						DBG_E1("Handling Reloc <DIS29W_PCREL>\n");
 						DBG_E1("DONT RELOCATE AT LOADING\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x], q->address : [0x%x]\n",
 										sec_vma, sym_addr, q->address);
 						sym_addr =  sec_vma + sym_addr;
@@ -1363,7 +1372,7 @@ NIOS2_RELOC_ERR:
 						DBG_E1("Handling Reloc <DIS29B>\n");
 DIS29_RELOCATION:
 						relocation_needed = 1;
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%08x]\n",
 										sec_vma, sym_addr);
 						sym_addr =  sec_vma + sym_addr;
@@ -1380,7 +1389,7 @@ DIS29_RELOCATION:
 						relocation_needed = 0;
 						DBG_E1("Handling Reloc <IMM32_PCREL>\n");
 						DBG_E1("DONT RELOCATE AT LOADING\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x]\n",
 										sec_vma, sym_addr);
 						sym_addr =  sec_vma + sym_addr;
@@ -1406,7 +1415,7 @@ DIS29_RELOCATION:
 				case R_E1_IMM32:
 						relocation_needed = 1;
 						DBG_E1("Handling Reloc <IMM32>\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x]\n",
 										sec_vma, sym_addr);
 						sym_addr =  sec_vma + sym_addr;
@@ -1422,7 +1431,7 @@ DIS29_RELOCATION:
 				case R_E1_WORD:
 						relocation_needed = 1;
 						DBG_E1("Handling Reloc <WORD>\n");
-						sec_vma = bfd_section_vma(abs_bfd, sym_section);
+						sec_vma = elf2flt_bfd_section_vma(sym_section);
 						DBG_E1("sec_vma : [0x%x], sym_addr : [0x%x]\n",
 										sec_vma, sym_addr);
 						sym_addr =  sec_vma + sym_addr;
@@ -1449,7 +1458,7 @@ DIS29_RELOCATION:
 			}
 
 			sprintf(&addstr[0], "+0x%lx", sym_addr - (*(q->sym_ptr_ptr))->value -
-					 bfd_section_vma(abs_bfd, sym_section));
+					 elf2flt_bfd_section_vma(sym_section));
 
 
 			/*
@@ -1887,8 +1896,8 @@ int main(int argc, char *argv[])
     } else
       continue;
 
-    sec_size = bfd_section_size(abs_bfd, s);
-    sec_vma  = bfd_section_vma(abs_bfd, s);
+    sec_size = elf2flt_bfd_section_size(s);
+    sec_vma  = elf2flt_bfd_section_vma(s);
 
     if (sec_vma < *vma) {
       if (*len > 0)
@@ -1913,7 +1922,7 @@ int main(int argc, char *argv[])
     if (s->flags & SEC_CODE) 
       if (!bfd_get_section_contents(abs_bfd, s,
 				   text + (s->vma - text_vma), 0,
-				   bfd_section_size(abs_bfd, s)))
+				   elf2flt_bfd_section_size(s)))
       {
 	fatal("read error section %s", s->name);
       }
@@ -1939,7 +1948,7 @@ int main(int argc, char *argv[])
     if (s->flags & SEC_DATA) 
       if (!bfd_get_section_contents(abs_bfd, s,
 				   data + (s->vma - data_vma), 0,
-				   bfd_section_size(abs_bfd, s)))
+				   elf2flt_bfd_section_size(s)))
       {
 	fatal("read error section %s", s->name);
       }
-- 
2.25.4