This is the mail archive of the
binutils@sourceware.org
mailing list for the binutils project.
[PATCH 1/6] Refactor disassembler selection
- From: Yao Qi <qiyaoltc at gmail dot com>
- To: binutils at sourceware dot org, gdb-patches at sourceware dot org
- Date: Tue, 16 May 2017 11:48:13 +0100
- Subject: [PATCH 1/6] Refactor disassembler selection
- Authentication-results: sourceware.org; auth=none
- References: <1494931698-15309-1-git-send-email-yao.qi@linaro.org>
Nowadays, opcodes/disassemble.c:disassembler selects the proper
disassembler according to ABFD only. However, it actually
selects disassemblers according to arch, mach, endianess, and
abfd. This patch adds them to the parameters of disassembler,
so that its caller can still select disassemblers in case that
abfd is NULL (a typical case in GDB).
There isn't any functionality change.
binutils:
2017-05-15 Yao Qi <yao.qi@linaro.org>
* objdump.c (disassemble_data): Caller update.
include:
2017-05-15 Yao Qi <yao.qi@linaro.org>
* dis-asm.h (disassembler): Update declaration.
opcodes:
2017-05-15 Yao Qi <yao.qi@linaro.org>
* disassemble.c (disassembler): Add arguments a, big and mach.
Use them.
sim/common:
2017-05-15 Yao Qi <yao.qi@linaro.org>
* sim-trace.c (trace_disasm): Caller update.
---
binutils/objdump.c | 4 +++-
include/dis-asm.h | 8 ++++++--
opcodes/disassemble.c | 41 ++++++++++++++++++++++++++---------------
sim/common/sim-trace.c | 6 +++++-
4 files changed, 40 insertions(+), 19 deletions(-)
diff --git a/binutils/objdump.c b/binutils/objdump.c
index 5972da1..81d47a0 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -2386,7 +2386,9 @@ disassemble_data (bfd *abfd)
}
/* Use libopcodes to locate a suitable disassembler. */
- aux.disassemble_fn = disassembler (abfd);
+ aux.disassemble_fn = disassembler (bfd_get_arch (abfd),
+ bfd_big_endian (abfd),
+ bfd_get_mach (abfd), abfd);
if (!aux.disassemble_fn)
{
non_fatal (_("can't disassemble for architecture %s\n"),
diff --git a/include/dis-asm.h b/include/dis-asm.h
index 6f1801d..dd93504 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -354,8 +354,12 @@ extern const disasm_options_t *disassembler_options_powerpc (void);
extern const disasm_options_t *disassembler_options_arm (void);
extern const disasm_options_t *disassembler_options_s390 (void);
-/* Fetch the disassembler for a given BFD, if that support is available. */
-extern disassembler_ftype disassembler (bfd *);
+/* Fetch the disassembler for a given architecture ARC, endianess (big
+ endian if BIG is true), bfd_mach value MACH, and ABFD, if that support
+ is available. ABFD may be NULL. */
+extern disassembler_ftype disassembler (enum bfd_architecture arc,
+ bfd_boolean big, unsigned long mach,
+ bfd *abfd);
/* Amend the disassemble_info structure as necessary for the target architecture.
Should only be called after initialising the info->arch field. */
diff --git a/opcodes/disassemble.c b/opcodes/disassemble.c
index dd7d3a3..e79b5c7 100644
--- a/opcodes/disassemble.c
+++ b/opcodes/disassemble.c
@@ -21,6 +21,7 @@
#include "sysdep.h"
#include "dis-asm.h"
#include "safe-ctype.h"
+#include <assert.h>
#ifdef ARCH_all
#define ARCH_aarch64
@@ -109,11 +110,22 @@
#endif
disassembler_ftype
-disassembler (bfd *abfd)
+disassembler (enum bfd_architecture a, bfd_boolean big, unsigned long mach,
+ bfd *abfd)
{
- enum bfd_architecture a = bfd_get_arch (abfd);
disassembler_ftype disassemble;
+ if (abfd != NULL)
+ {
+ /* Do some asserts that the first three parameters should equal
+ to what we can get from ABFD. On the other hand, these
+ asserts help removing some compiler errors on unused
+ parameter. */
+ assert (a == bfd_get_arch (abfd));
+ assert (big == bfd_big_endian (abfd));
+ assert (mach == bfd_get_mach (abfd));
+ }
+
switch (a)
{
/* If you add a case to this table, also add it to the
@@ -135,7 +147,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_arm
case bfd_arch_arm:
- if (bfd_big_endian (abfd))
+ if (big)
disassemble = print_insn_big_arm;
else
disassemble = print_insn_little_arm;
@@ -184,13 +196,12 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_h8300
case bfd_arch_h8300:
- if (bfd_get_mach (abfd) == bfd_mach_h8300h
- || bfd_get_mach (abfd) == bfd_mach_h8300hn)
+ if (mach == bfd_mach_h8300h || mach == bfd_mach_h8300hn)
disassemble = print_insn_h8300h;
- else if (bfd_get_mach (abfd) == bfd_mach_h8300s
- || bfd_get_mach (abfd) == bfd_mach_h8300sn
- || bfd_get_mach (abfd) == bfd_mach_h8300sx
- || bfd_get_mach (abfd) == bfd_mach_h8300sxn)
+ else if (mach == bfd_mach_h8300s
+ || mach == bfd_mach_h8300sn
+ || mach == bfd_mach_h8300sx
+ || mach == bfd_mach_h8300sxn)
disassemble = print_insn_h8300s;
else
disassemble = print_insn_h8300;
@@ -326,7 +337,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_mips
case bfd_arch_mips:
- if (bfd_big_endian (abfd))
+ if (big)
disassemble = print_insn_big_mips;
else
disassemble = print_insn_little_mips;
@@ -349,7 +360,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_nios2
case bfd_arch_nios2:
- if (bfd_big_endian (abfd))
+ if (big)
disassemble = print_insn_big_nios2;
else
disassemble = print_insn_little_nios2;
@@ -372,7 +383,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_powerpc
case bfd_arch_powerpc:
- if (bfd_big_endian (abfd))
+ if (big)
disassemble = print_insn_big_powerpc;
else
disassemble = print_insn_little_powerpc;
@@ -390,7 +401,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_rs6000
case bfd_arch_rs6000:
- if (bfd_get_mach (abfd) == bfd_mach_ppc_620)
+ if (mach == bfd_mach_ppc_620)
disassemble = print_insn_big_powerpc;
else
disassemble = print_insn_rs6000;
@@ -413,7 +424,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_score
case bfd_arch_score:
- if (bfd_big_endian (abfd))
+ if (big)
disassemble = print_insn_big_score;
else
disassemble = print_insn_little_score;
@@ -507,7 +518,7 @@ disassembler (bfd *abfd)
#endif
#ifdef ARCH_z8k
case bfd_arch_z8k:
- if (bfd_get_mach(abfd) == bfd_mach_z8001)
+ if (mach == bfd_mach_z8001)
disassemble = print_insn_z8001;
else
disassemble = print_insn_z8002;
diff --git a/sim/common/sim-trace.c b/sim/common/sim-trace.c
index da19b82..ff11d20 100644
--- a/sim/common/sim-trace.c
+++ b/sim/common/sim-trace.c
@@ -919,7 +919,11 @@ trace_disasm (SIM_DESC sd, sim_cpu *cpu, address_word addr)
if (trace_data->dis_bfd != bfd)
{
trace_data->dis_bfd = bfd;
- trace_data->disassembler = disassembler (trace_data->dis_bfd);
+ trace_data->disassembler
+ = disassembler (bfd_get_arch (trace_data->dis_bfd),
+ bfd_big_endian (trace_data->dis_bfd),
+ bfd_get_mach (trace_data->dis_bfd),
+ trace_data->dis_bfd);
INIT_DISASSEMBLE_INFO (*info, cpu, dis_printf);
info->read_memory_func = dis_read;
info->arch = bfd_get_arch (bfd);
--
1.9.1