X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsparc-linux-tdep.c;h=be3ff8d81418e7420701d420e8563ff6c401867f;hb=f81e7e2db6d1aaf47561e54356aee12b585533c2;hp=300db9aa7ddf234e4f19dd2b14e11e8f236073bb;hpb=197e01b6dcd118b70ed3621b62b2ff3fa929d50f;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/sparc-linux-tdep.c b/gdb/sparc-linux-tdep.c
index 300db9aa7d..be3ff8d814 100644
--- a/gdb/sparc-linux-tdep.c
+++ b/gdb/sparc-linux-tdep.c
@@ -1,12 +1,12 @@
/* Target-dependent code for GNU/Linux SPARC.
- Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -15,14 +15,14 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see . */
#include "defs.h"
-#include "floatformat.h"
+#include "dwarf2-frame.h"
#include "frame.h"
#include "frame-unwind.h"
+#include "gdbtypes.h"
+#include "regset.h"
#include "gdbarch.h"
#include "gdbcore.h"
#include "osabi.h"
@@ -31,13 +31,18 @@
#include "symtab.h"
#include "trad-frame.h"
#include "tramp-frame.h"
+#include "xml-syscall.h"
+#include "linux-tdep.h"
+
+/* The syscall's XML filename for sparc 32-bit. */
+#define XML_SYSCALL_FILENAME_SPARC32 "syscalls/sparc-linux.xml"
#include "sparc-tdep.h"
/* Signal trampoline support. */
static void sparc32_linux_sigframe_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func);
@@ -63,9 +68,9 @@ static const struct tramp_frame sparc32_linux_sigframe =
SIGTRAMP_FRAME,
4,
{
- { 0x821020d8, -1 }, /* mov __NR_sugreturn, %g1 */
- { 0x91d02010, -1 }, /* ta 0x10 */
- { TRAMP_SENTINEL_INSN, -1 }
+ { 0x821020d8, ULONGEST_MAX }, /* mov __NR_sigreturn, %g1 */
+ { 0x91d02010, ULONGEST_MAX }, /* ta 0x10 */
+ { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
sparc32_linux_sigframe_init
};
@@ -78,23 +83,48 @@ static const struct tramp_frame sparc32_linux_rt_sigframe =
SIGTRAMP_FRAME,
4,
{
- { 0x82102065, -1 }, /* mov __NR_rt_sigreturn, %g1 */
- { 0x91d02010, -1 }, /* ta 0x10 */
- { TRAMP_SENTINEL_INSN, -1 }
+ { 0x82102065, ULONGEST_MAX }, /* mov __NR_rt_sigreturn, %g1 */
+ { 0x91d02010, ULONGEST_MAX }, /* ta 0x10 */
+ { TRAMP_SENTINEL_INSN, ULONGEST_MAX }
},
sparc32_linux_sigframe_init
};
+/* This enum represents the signals' numbers on the SPARC
+ architecture. It just contains the signal definitions which are
+ different from the generic implementation.
+
+ It is derived from the file ,
+ from the Linux kernel tree. */
+
+enum
+ {
+ SPARC_LINUX_SIGEMT = 7,
+ SPARC_LINUX_SIGBUS = 10,
+ SPARC_LINUX_SIGSYS = 12,
+ SPARC_LINUX_SIGURG = 16,
+ SPARC_LINUX_SIGSTOP = 17,
+ SPARC_LINUX_SIGTSTP = 18,
+ SPARC_LINUX_SIGCONT = 19,
+ SPARC_LINUX_SIGCHLD = 20,
+ SPARC_LINUX_SIGIO = 23,
+ SPARC_LINUX_SIGPOLL = SPARC_LINUX_SIGIO,
+ SPARC_LINUX_SIGLOST = 29,
+ SPARC_LINUX_SIGPWR = SPARC_LINUX_SIGLOST,
+ SPARC_LINUX_SIGUSR1 = 30,
+ SPARC_LINUX_SIGUSR2 = 31,
+ };
+
static void
sparc32_linux_sigframe_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- CORE_ADDR base, addr;
+ CORE_ADDR base, addr, sp_addr;
int regnum;
- base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
+ base = get_frame_register_unsigned (this_frame, SPARC_O1_REGNUM);
if (self == &sparc32_linux_rt_sigframe)
base += 128;
@@ -107,13 +137,16 @@ sparc32_linux_sigframe_init (const struct tramp_frame *self,
/* Since %g0 is always zero, keep the identity encoding. */
addr = base + 20;
+ sp_addr = base + 16 + ((SPARC_SP_REGNUM - SPARC_G0_REGNUM) * 4);
for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
addr += 4;
}
- base = addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ base = get_frame_register_unsigned (this_frame, SPARC_SP_REGNUM);
+ addr = get_frame_memory_unsigned (this_frame, sp_addr, 4);
+
for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
@@ -121,13 +154,282 @@ sparc32_linux_sigframe_init (const struct tramp_frame *self,
}
trad_frame_set_id (this_cache, frame_id_build (base, func));
}
+
+/* Return the address of a system call's alternative return
+ address. */
+
+static CORE_ADDR
+sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn)
+{
+ if (insn == 0x91d02010)
+ {
+ ULONGEST sc_num = get_frame_register_unsigned (frame, SPARC_G1_REGNUM);
+
+ /* __NR_rt_sigreturn is 101 and __NR_sigreturn is 216. */
+ if (sc_num == 101 || sc_num == 216)
+ {
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ ULONGEST sp, pc_offset;
+
+ sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM);
+
+ /* The kernel puts the sigreturn registers on the stack,
+ and this is where the signal unwinding state is take from
+ when returning from a signal.
+
+ For __NR_sigreturn, this register area sits 96 bytes from
+ the base of the stack. The saved PC sits 4 bytes into the
+ sigreturn register save area.
+
+ For __NR_rt_sigreturn a siginfo_t, which is 128 bytes, sits
+ right before the sigreturn register save area. */
+
+ pc_offset = 96 + 4;
+ if (sc_num == 101)
+ pc_offset += 128;
+
+ return read_memory_unsigned_integer (sp + pc_offset, 4, byte_order);
+ }
+ }
+
+ return 0;
+}
+
+
+const struct sparc_gregmap sparc32_linux_core_gregmap =
+{
+ 32 * 4, /* %psr */
+ 33 * 4, /* %pc */
+ 34 * 4, /* %npc */
+ 35 * 4, /* %y */
+ -1, /* %wim */
+ -1, /* %tbr */
+ 1 * 4, /* %g1 */
+ 16 * 4, /* %l0 */
+ 4, /* y size */
+};
+
+
+static void
+sparc32_linux_supply_core_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ sparc32_supply_gregset (&sparc32_linux_core_gregmap,
+ regcache, regnum, gregs);
+}
+
+static void
+sparc32_linux_collect_core_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ sparc32_collect_gregset (&sparc32_linux_core_gregmap,
+ regcache, regnum, gregs);
+}
+
+static void
+sparc32_linux_supply_core_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
+}
+
+static void
+sparc32_linux_collect_core_fpregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *fpregs, size_t len)
+{
+ sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
+}
+
+/* Set the program counter for process PTID to PC. */
+
+#define PSR_SYSCALL 0x00004000
+
+static void
+sparc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (regcache->arch ());
+ ULONGEST psr;
+
+ regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
+ regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4);
+
+ /* Clear the "in syscall" bit to prevent the kernel from
+ messing with the PCs we just installed, if we happen to be
+ within an interrupted system call that the kernel wants to
+ restart.
+
+ Note that after we return from the dummy call, the PSR et al.
+ registers will be automatically restored, and the kernel
+ continues to restart the system call at this point. */
+ regcache_cooked_read_unsigned (regcache, SPARC32_PSR_REGNUM, &psr);
+ psr &= ~PSR_SYSCALL;
+ regcache_cooked_write_unsigned (regcache, SPARC32_PSR_REGNUM, psr);
+}
+
+static LONGEST
+sparc32_linux_get_syscall_number (struct gdbarch *gdbarch,
+ thread_info *thread)
+{
+ struct regcache *regcache = get_thread_regcache (thread);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ /* The content of a register. */
+ gdb_byte buf[4];
+ /* The result. */
+ LONGEST ret;
+
+ /* Getting the system call number from the register.
+ When dealing with the sparc architecture, this information
+ is stored at the %g1 register. */
+ regcache->cooked_read (SPARC_G1_REGNUM, buf);
+
+ ret = extract_signed_integer (buf, 4, byte_order);
+
+ return ret;
+}
+
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+ gdbarch.h. */
+
+static enum gdb_signal
+sparc32_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+ int signal)
+{
+ switch (signal)
+ {
+ case SPARC_LINUX_SIGEMT:
+ return GDB_SIGNAL_EMT;
+
+ case SPARC_LINUX_SIGBUS:
+ return GDB_SIGNAL_BUS;
+
+ case SPARC_LINUX_SIGSYS:
+ return GDB_SIGNAL_SYS;
+
+ case SPARC_LINUX_SIGURG:
+ return GDB_SIGNAL_URG;
+
+ case SPARC_LINUX_SIGSTOP:
+ return GDB_SIGNAL_STOP;
+
+ case SPARC_LINUX_SIGTSTP:
+ return GDB_SIGNAL_TSTP;
+
+ case SPARC_LINUX_SIGCONT:
+ return GDB_SIGNAL_CONT;
+
+ case SPARC_LINUX_SIGCHLD:
+ return GDB_SIGNAL_CHLD;
+
+ /* No way to differentiate between SIGIO and SIGPOLL.
+ Therefore, we just handle the first one. */
+ case SPARC_LINUX_SIGIO:
+ return GDB_SIGNAL_IO;
+
+ /* No way to differentiate between SIGLOST and SIGPWR.
+ Therefore, we just handle the first one. */
+ case SPARC_LINUX_SIGLOST:
+ return GDB_SIGNAL_LOST;
+
+ case SPARC_LINUX_SIGUSR1:
+ return GDB_SIGNAL_USR1;
+
+ case SPARC_LINUX_SIGUSR2:
+ return GDB_SIGNAL_USR2;
+ }
+
+ return linux_gdb_signal_from_target (gdbarch, signal);
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target', as defined in
+ gdbarch.h. */
+
+static int
+sparc32_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ case GDB_SIGNAL_EMT:
+ return SPARC_LINUX_SIGEMT;
+
+ case GDB_SIGNAL_BUS:
+ return SPARC_LINUX_SIGBUS;
+
+ case GDB_SIGNAL_SYS:
+ return SPARC_LINUX_SIGSYS;
+
+ case GDB_SIGNAL_URG:
+ return SPARC_LINUX_SIGURG;
+
+ case GDB_SIGNAL_STOP:
+ return SPARC_LINUX_SIGSTOP;
+
+ case GDB_SIGNAL_TSTP:
+ return SPARC_LINUX_SIGTSTP;
+
+ case GDB_SIGNAL_CONT:
+ return SPARC_LINUX_SIGCONT;
+
+ case GDB_SIGNAL_CHLD:
+ return SPARC_LINUX_SIGCHLD;
+
+ case GDB_SIGNAL_IO:
+ return SPARC_LINUX_SIGIO;
+
+ case GDB_SIGNAL_POLL:
+ return SPARC_LINUX_SIGPOLL;
+
+ case GDB_SIGNAL_LOST:
+ return SPARC_LINUX_SIGLOST;
+
+ case GDB_SIGNAL_PWR:
+ return SPARC_LINUX_SIGPWR;
+
+ case GDB_SIGNAL_USR1:
+ return SPARC_LINUX_SIGUSR1;
+
+ case GDB_SIGNAL_USR2:
+ return SPARC_LINUX_SIGUSR2;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
+}
+
+static const struct regset sparc32_linux_gregset =
+ {
+ NULL,
+ sparc32_linux_supply_core_gregset,
+ sparc32_linux_collect_core_gregset
+ };
+
+static const struct regset sparc32_linux_fpregset =
+ {
+ NULL,
+ sparc32_linux_supply_core_fpregset,
+ sparc32_linux_collect_core_fpregset
+ };
+
static void
sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ linux_init_abi (info, gdbarch);
+
+ tdep->gregset = &sparc32_linux_gregset;
+ tdep->sizeof_gregset = 152;
+
+ tdep->fpregset = &sparc32_linux_fpregset;
+ tdep->sizeof_fpregset = 396;
+
tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_rt_sigframe);
@@ -140,17 +442,28 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
prologue analysis. */
tdep->plt_entry_size = 12;
- /* GNU/Linux doesn't support the 128-bit `long double' from the psABI. */
- set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
-
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
-}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern void _initialize_sparc_linux_tdep (void);
+ /* Make sure we can single-step over signal return system calls. */
+ tdep->step_trap = sparc32_linux_step_trap;
+
+ /* Hook in the DWARF CFI frame unwinder. */
+ dwarf2_append_unwinders (gdbarch);
+
+ set_gdbarch_write_pc (gdbarch, sparc_linux_write_pc);
+
+ /* Functions for 'catch syscall'. */
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_SPARC32);
+ set_gdbarch_get_syscall_number (gdbarch,
+ sparc32_linux_get_syscall_number);
+
+ set_gdbarch_gdb_signal_from_target (gdbarch,
+ sparc32_linux_gdb_signal_from_target);
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ sparc32_linux_gdb_signal_to_target);
+}
void
_initialize_sparc_linux_tdep (void)