From e85596e021d0c4246a4ea21885c52e91583c463e Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 19 Dec 2013 14:22:30 -0800 Subject: [PATCH] Zero-extend address from 32-bit to 64-bit for ADDR32 prefix When there is ADDR32 prefix in 64-bit mode, we should zero-extend address from 32-bit to 64-bit. PR gdb/16304 * i386-tdep.c (i386_record_lea_modrm_addr): Zero-extend 32-bit address to 64-bit in 64-bit mode. --- gdb/ChangeLog | 6 ++++++ gdb/i386-tdep.c | 7 +++++++ 2 files changed, 13 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index c8cd42a7cb6..c12e90766af 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2013-12-19 H.J. Lu + + PR gdb/16304 + * i386-tdep.c (i386_record_lea_modrm_addr): Zero-extend 32-bit + address to 64-bit in 64-bit mode. + 2013-12-19 H.J. Lu PR gdb/16304 diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c index f876675c4d8..ff378517817 100644 --- a/gdb/i386-tdep.c +++ b/gdb/i386-tdep.c @@ -4282,6 +4282,13 @@ i386_record_lea_modrm_addr (struct i386_record_s *irp, uint64_t *addr) else *addr = (uint32_t) (*addr + (offset64 << scale)); } + + if (!irp->aflag) + { + /* Since we are in 64-bit mode with ADDR32 prefix, zero-extend + address from 32-bit to 64-bit. */ + *addr = (uint32_t) *addr; + } } else { -- 2.30.2