/* Target-dependent code for GNU/Linux on Alpha.
- Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "frame.h"
-#include "gdb_assert.h"
-#include "gdb_string.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "regset.h"
#include "regcache.h"
-
+#include "linux-tdep.h"
#include "alpha-tdep.h"
+#include "gdbarch.h"
+
+/* This enum represents the signals' numbers on the Alpha
+ architecture. It just contains the signal definitions which are
+ different from the generic implementation.
+
+ It is derived from the file <arch/alpha/include/uapi/asm/signal.h>,
+ from the Linux kernel tree. */
+
+enum
+ {
+ /* SIGABRT is the same as in the generic implementation, but is
+ defined here because SIGIOT depends on it. */
+ ALPHA_LINUX_SIGABRT = 6,
+ ALPHA_LINUX_SIGEMT = 7,
+ ALPHA_LINUX_SIGBUS = 10,
+ ALPHA_LINUX_SIGSYS = 12,
+ ALPHA_LINUX_SIGURG = 16,
+ ALPHA_LINUX_SIGSTOP = 17,
+ ALPHA_LINUX_SIGTSTP = 18,
+ ALPHA_LINUX_SIGCONT = 19,
+ ALPHA_LINUX_SIGCHLD = 20,
+ ALPHA_LINUX_SIGIO = 23,
+ ALPHA_LINUX_SIGINFO = 29,
+ ALPHA_LINUX_SIGUSR1 = 30,
+ ALPHA_LINUX_SIGUSR2 = 31,
+ ALPHA_LINUX_SIGPOLL = ALPHA_LINUX_SIGIO,
+ ALPHA_LINUX_SIGPWR = ALPHA_LINUX_SIGINFO,
+ ALPHA_LINUX_SIGIOT = ALPHA_LINUX_SIGABRT,
+ };
/* Under GNU/Linux, signal handler invocations can be identified by
the designated code sequence that is used to return from a signal
(2) the kernel has changed from using "addq" to "lda" to load the
syscall number,
(3) there is a "normal" sigreturn and an "rt" sigreturn which
- has a different stack layout.
-*/
+ has a different stack layout. */
static long
-alpha_linux_sigtramp_offset_1 (CORE_ADDR pc)
+alpha_linux_sigtramp_offset_1 (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- switch (alpha_read_insn (pc))
+ switch (alpha_read_insn (gdbarch, pc))
{
case 0x47de0410: /* bis $30,$30,$16 */
case 0x47fe0410: /* bis $31,$30,$16 */
}
static LONGEST
-alpha_linux_sigtramp_offset (CORE_ADDR pc)
+alpha_linux_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
{
long i, off;
return -1;
/* Guess where we might be in the sequence. */
- off = alpha_linux_sigtramp_offset_1 (pc);
+ off = alpha_linux_sigtramp_offset_1 (gdbarch, pc);
if (off < 0)
return -1;
{
if (i == off)
continue;
- if (alpha_linux_sigtramp_offset_1 (pc + i) != i)
+ if (alpha_linux_sigtramp_offset_1 (gdbarch, pc + i) != i)
return -1;
}
}
static int
-alpha_linux_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+alpha_linux_pc_in_sigtramp (struct gdbarch *gdbarch,
+ CORE_ADDR pc, const char *func_name)
{
- return alpha_linux_sigtramp_offset (pc) >= 0;
+ return alpha_linux_sigtramp_offset (gdbarch, pc) >= 0;
}
static CORE_ADDR
-alpha_linux_sigcontext_addr (struct frame_info *next_frame)
+alpha_linux_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
CORE_ADDR pc;
ULONGEST sp;
long off;
- pc = frame_pc_unwind (next_frame);
- sp = frame_unwind_register_unsigned (next_frame, ALPHA_SP_REGNUM);
+ pc = get_frame_pc (this_frame);
+ sp = get_frame_register_unsigned (this_frame, ALPHA_SP_REGNUM);
- off = alpha_linux_sigtramp_offset (pc);
+ off = alpha_linux_sigtramp_offset (gdbarch, pc);
gdb_assert (off >= 0);
/* __NR_rt_sigreturn has a couple of structures on the stack. This is:
struct ucontext uc;
};
- offsetof (struct rt_sigframe, uc.uc_mcontext);
- */
- if (alpha_read_insn (pc - off + 4) == 0x201f015f)
+ offsetof (struct rt_sigframe, uc.uc_mcontext); */
+
+ if (alpha_read_insn (gdbarch, pc - off + 4) == 0x201f015f)
return sp + 176;
/* __NR_sigreturn has the sigcontext structure at the top of the stack. */
struct regcache *regcache,
int regnum, const void *gregs, size_t len)
{
- const gdb_byte *regs = gregs;
- int i;
+ const gdb_byte *regs = (const gdb_byte *) gregs;
+
gdb_assert (len >= 32 * 8);
+ alpha_supply_int_regs (regcache, regnum, regs, regs + 31 * 8,
+ len >= 33 * 8 ? regs + 32 * 8 : NULL);
+}
- for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache_raw_supply (regcache, i, regs + i * 8);
- }
+/* Collect register REGNUM from the register cache REGCACHE and store
+ it in the buffer specified by GREGS and LEN as described by the
+ general-purpose register set REGSET. If REGNUM is -1, do this for
+ all registers in REGSET. */
- if (regnum == ALPHA_PC_REGNUM || regnum == -1)
- regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
+static void
+alpha_linux_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ gdb_byte *regs = (gdb_byte *) gregs;
- if (regnum == ALPHA_UNIQUE_REGNUM || regnum == -1)
- regcache_raw_supply (regcache, ALPHA_UNIQUE_REGNUM,
- len >= 33 * 8 ? regs + 32 * 8 : NULL);
+ gdb_assert (len >= 32 * 8);
+ alpha_fill_int_regs (regcache, regnum, regs, regs + 31 * 8,
+ len >= 33 * 8 ? regs + 32 * 8 : NULL);
}
/* Supply register REGNUM from the buffer specified by FPREGS and LEN
struct regcache *regcache,
int regnum, const void *fpregs, size_t len)
{
- const gdb_byte *regs = fpregs;
- int i;
+ const gdb_byte *regs = (const gdb_byte *) fpregs;
+
gdb_assert (len >= 32 * 8);
+ alpha_supply_fp_regs (regcache, regnum, regs, regs + 31 * 8);
+}
- for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
- {
- if (regnum == i || regnum == -1)
- regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
- }
+/* Collect register REGNUM from the register cache REGCACHE and store
+ it in the buffer specified by FPREGS and LEN as described by the
+ general-purpose register set REGSET. If REGNUM is -1, do this for
+ all registers in REGSET. */
- if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
- regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 31 * 8);
+static void
+alpha_linux_collect_fpregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *fpregs, size_t len)
+{
+ gdb_byte *regs = (gdb_byte *) fpregs;
+
+ gdb_assert (len >= 32 * 8);
+ alpha_fill_fp_regs (regcache, regnum, regs, regs + 31 * 8);
}
-static struct regset alpha_linux_gregset =
+static const struct regset alpha_linux_gregset =
{
NULL,
- alpha_linux_supply_gregset
+ alpha_linux_supply_gregset, alpha_linux_collect_gregset
};
-static struct regset alpha_linux_fpregset =
+static const struct regset alpha_linux_fpregset =
{
NULL,
- alpha_linux_supply_fpregset
+ alpha_linux_supply_fpregset, alpha_linux_collect_fpregset
};
-/* Return the appropriate register set for the core section identified
- by SECT_NAME and SECT_SIZE. */
+/* Iterate over core file register note sections. */
-const struct regset *
-alpha_linux_regset_from_core_section (struct gdbarch *gdbarch,
- const char *sect_name, size_t sect_size)
+static void
+alpha_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
{
- if (strcmp (sect_name, ".reg") == 0 && sect_size >= 32 * 8)
- return &alpha_linux_gregset;
+ cb (".reg", 32 * 8, 32 * 8, &alpha_linux_gregset, NULL, cb_data);
+ cb (".reg2", 32 * 8, 32 * 8, &alpha_linux_fpregset, NULL, cb_data);
+}
+
+/* Implementation of `gdbarch_gdb_signal_from_target', as defined in
+ gdbarch.h. */
+
+static enum gdb_signal
+alpha_linux_gdb_signal_from_target (struct gdbarch *gdbarch,
+ int signal)
+{
+ switch (signal)
+ {
+ case ALPHA_LINUX_SIGEMT:
+ return GDB_SIGNAL_EMT;
+
+ case ALPHA_LINUX_SIGBUS:
+ return GDB_SIGNAL_BUS;
+
+ case ALPHA_LINUX_SIGSYS:
+ return GDB_SIGNAL_SYS;
+
+ case ALPHA_LINUX_SIGURG:
+ return GDB_SIGNAL_URG;
+
+ case ALPHA_LINUX_SIGSTOP:
+ return GDB_SIGNAL_STOP;
+
+ case ALPHA_LINUX_SIGTSTP:
+ return GDB_SIGNAL_TSTP;
- if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 32 * 8)
- return &alpha_linux_fpregset;
+ case ALPHA_LINUX_SIGCONT:
+ return GDB_SIGNAL_CONT;
- return NULL;
+ case ALPHA_LINUX_SIGCHLD:
+ return GDB_SIGNAL_CHLD;
+
+ /* No way to differentiate between SIGIO and SIGPOLL.
+ Therefore, we just handle the first one. */
+ case ALPHA_LINUX_SIGIO:
+ return GDB_SIGNAL_IO;
+
+ /* No way to differentiate between SIGINFO and SIGPWR.
+ Therefore, we just handle the first one. */
+ case ALPHA_LINUX_SIGINFO:
+ return GDB_SIGNAL_INFO;
+
+ case ALPHA_LINUX_SIGUSR1:
+ return GDB_SIGNAL_USR1;
+
+ case ALPHA_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
+alpha_linux_gdb_signal_to_target (struct gdbarch *gdbarch,
+ enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ case GDB_SIGNAL_EMT:
+ return ALPHA_LINUX_SIGEMT;
+
+ case GDB_SIGNAL_BUS:
+ return ALPHA_LINUX_SIGBUS;
+
+ case GDB_SIGNAL_SYS:
+ return ALPHA_LINUX_SIGSYS;
+
+ case GDB_SIGNAL_URG:
+ return ALPHA_LINUX_SIGURG;
+
+ case GDB_SIGNAL_STOP:
+ return ALPHA_LINUX_SIGSTOP;
+
+ case GDB_SIGNAL_TSTP:
+ return ALPHA_LINUX_SIGTSTP;
+
+ case GDB_SIGNAL_CONT:
+ return ALPHA_LINUX_SIGCONT;
+
+ case GDB_SIGNAL_CHLD:
+ return ALPHA_LINUX_SIGCHLD;
+
+ case GDB_SIGNAL_IO:
+ return ALPHA_LINUX_SIGIO;
+
+ case GDB_SIGNAL_INFO:
+ return ALPHA_LINUX_SIGINFO;
+
+ case GDB_SIGNAL_USR1:
+ return ALPHA_LINUX_SIGUSR1;
+
+ case GDB_SIGNAL_USR2:
+ return ALPHA_LINUX_SIGUSR2;
+
+ case GDB_SIGNAL_POLL:
+ return ALPHA_LINUX_SIGPOLL;
+
+ case GDB_SIGNAL_PWR:
+ return ALPHA_LINUX_SIGPWR;
+ }
+
+ return linux_gdb_signal_to_target (gdbarch, signal);
}
static void
{
struct gdbarch_tdep *tdep;
+ linux_init_abi (info, gdbarch);
+
/* Hook into the DWARF CFI frame unwinder. */
alpha_dwarf2_init_abi (info, gdbarch);
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
- set_gdbarch_regset_from_core_section
- (gdbarch, alpha_linux_regset_from_core_section);
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, alpha_linux_iterate_over_regset_sections);
+
+ set_gdbarch_gdb_signal_from_target (gdbarch,
+ alpha_linux_gdb_signal_from_target);
+ set_gdbarch_gdb_signal_to_target (gdbarch,
+ alpha_linux_gdb_signal_to_target);
}
+void _initialize_alpha_linux_tdep ();
void
-_initialize_alpha_linux_tdep (void)
+_initialize_alpha_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_LINUX,
alpha_linux_init_abi);
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