167 lines
5.1 KiB
Diff
167 lines
5.1 KiB
Diff
http://sourceware.org/ml/gdb-patches/2012-03/msg00358.html
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Subject: [patch 2/2] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 #5
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Hi,
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here is the ON_STACK code again, with fixed alignment for i386 SSE.
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It is generalized for all OSes on i386/amd64. I can move it to
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{i386,amd64)-linux-tdep.c but I find this code much more lightweight than
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i386_push_dummy_call which is already present in i386-tdep.
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No regressions on
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{x86_64,x86_64-m32,i686}-fedora(15-rawhide)/rhel(5-6)-linux-gnu and for
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gdbsever non-extended mode.
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For x86_64-fedora17-linux-gnu it fixes:
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-FAIL: gdb.cp/gdb2495.exp: Call a function that raises an exception without a handler.
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-FAIL: gdb.cp/gdb2495.exp: bt after returning from a popped frame
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+PASS: gdb.cp/gdb2495.exp: Call a function that raises an exception without a handler.
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+PASS: gdb.cp/gdb2495.exp: bt after returning from a popped frame
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Thanks,
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Jan
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gdb/
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2012-03-09 Jan Kratochvil <jan.kratochvil@redhat.com>
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* amd64-dicos-tdep.c (amd64_dicos_push_dummy_code): Remove.
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(amd64_dicos_init_abi): Remove its installment.
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* dicos-tdep.c (dicos_init_abi): Remove the
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set_gdbarch_call_dummy_location call. Update the comment here.
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* i386-dicos-tdep.c (i386_dicos_push_dummy_code): Remove.
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(i386_dicos_init_abi): Remove its installment.
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* i386-tdep.c (i386_push_dummy_code): New function.
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(i386_gdbarch_init): Call set_gdbarch_call_dummy_location, install
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i386_push_dummy_code.
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--- a/gdb/amd64-dicos-tdep.c
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+++ b/gdb/amd64-dicos-tdep.c
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@@ -23,24 +23,6 @@
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#include "amd64-tdep.h"
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#include "dicos-tdep.h"
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-static CORE_ADDR
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-amd64_dicos_push_dummy_code (struct gdbarch *gdbarch,
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- CORE_ADDR sp, CORE_ADDR funaddr,
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- struct value **args, int nargs,
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- struct type *value_type,
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- CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
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- struct regcache *regcache)
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-{
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- int bplen;
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- CORE_ADDR bppc = sp;
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-
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- gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
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- *bp_addr = sp - bplen;
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- *real_pc = funaddr;
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-
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- return *bp_addr;
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-}
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-
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static void
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amd64_dicos_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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@@ -49,8 +31,6 @@ amd64_dicos_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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amd64_init_abi (info, gdbarch);
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dicos_init_abi (gdbarch);
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-
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- set_gdbarch_push_dummy_code (gdbarch, amd64_dicos_push_dummy_code);
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}
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static enum gdb_osabi
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--- a/gdb/dicos-tdep.c
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+++ b/gdb/dicos-tdep.c
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@@ -43,8 +43,8 @@ dicos_init_abi (struct gdbarch *gdbarch)
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/* There's no (standard definition of) entry point or a guaranteed
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text location with a symbol where to place the call dummy, so we
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- put it on the stack. */
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- set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
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+ need it on the stack. Rely on i386_gdbarch_init used also for
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+ amd64 to set up ON_STACK inferior calls. */
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/* DICOS rewinds the PC itself. */
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set_gdbarch_decr_pc_after_break (gdbarch, 0);
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--- a/gdb/i386-dicos-tdep.c
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+++ b/gdb/i386-dicos-tdep.c
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@@ -22,32 +22,12 @@
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#include "gdb_string.h"
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#include "dicos-tdep.h"
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-static CORE_ADDR
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-i386_dicos_push_dummy_code (struct gdbarch *gdbarch,
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- CORE_ADDR sp, CORE_ADDR funaddr,
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- struct value **args, int nargs,
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- struct type *value_type,
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- CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
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- struct regcache *regcache)
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-{
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- int bplen;
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- CORE_ADDR bppc = sp;
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-
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- gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
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- *bp_addr = sp - bplen;
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- *real_pc = funaddr;
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-
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- return *bp_addr;
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-}
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-
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static void
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i386_dicos_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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dicos_init_abi (gdbarch);
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-
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- set_gdbarch_push_dummy_code (gdbarch, i386_dicos_push_dummy_code);
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}
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static enum gdb_osabi
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--- a/gdb/i386-tdep.c
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+++ b/gdb/i386-tdep.c
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@@ -2326,6 +2326,30 @@ i386_16_byte_align_p (struct type *type)
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return 0;
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}
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+/* Implementation for set_gdbarch_push_dummy_code. */
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+
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+static CORE_ADDR
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+i386_push_dummy_code (struct gdbarch *gdbarch, CORE_ADDR sp, CORE_ADDR funaddr,
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+ struct value **args, int nargs, struct type *value_type,
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+ CORE_ADDR *real_pc, CORE_ADDR *bp_addr,
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+ struct regcache *regcache)
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+{
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+ int bplen;
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+ CORE_ADDR bppc = sp;
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+
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+ gdbarch_breakpoint_from_pc (gdbarch, &bppc, &bplen);
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+ sp -= bplen;
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+
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+ /* amd64_push_dummy_call does alignment on its own but i386_push_dummy_call
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+ does not. ABI requires stack alignment for executables using SSE. */
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+ if (gdbarch_frame_align_p (gdbarch))
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+ sp = gdbarch_frame_align (gdbarch, sp);
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+
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+ *bp_addr = sp;
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+ *real_pc = funaddr;
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+ return sp;
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+}
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+
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static CORE_ADDR
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i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
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struct regcache *regcache, CORE_ADDR bp_addr, int nargs,
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@@ -7372,6 +7396,8 @@ i386_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
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set_gdbarch_get_longjmp_target (gdbarch, i386_get_longjmp_target);
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/* Call dummy code. */
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+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
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+ set_gdbarch_push_dummy_code (gdbarch, i386_push_dummy_code);
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set_gdbarch_push_dummy_call (gdbarch, i386_push_dummy_call);
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set_gdbarch_frame_align (gdbarch, i386_frame_align);
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