#include "gdb_string.h"
#include "gdb_assert.h"
#include "frame.h"
+#include "regcache.h"
+#include "trad-frame.h"
+#include "tramp-frame.h"
/* Copied from <asm/elf.h>. */
#define ELF_NGREG 45
#define EF_SIZE 180
/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from
- which we extract the pc (MIPS_LINUX_JB_PC) that we will land at. The pc
- is copied into PC. This routine returns 1 on success. */
+ We expect the first arg to be a pointer to the jmp_buf structure
+ from which we extract the pc (MIPS_LINUX_JB_PC) that we will land
+ at. The pc is copied into PC. This routine returns 1 on
+ success. */
#define MIPS_LINUX_JB_ELEMENT_SIZE 4
#define MIPS_LINUX_JB_PC 0
CORE_ADDR jb_addr;
char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
- jb_addr = read_register (A0_REGNUM);
+ jb_addr = read_register (MIPS_A0_REGNUM);
if (target_read_memory (jb_addr
+ MIPS_LINUX_JB_PC * MIPS_LINUX_JB_ELEMENT_SIZE,
}
/* Transform the bits comprising a 32-bit register to the right size
- for supply_register(). This is needed when mips_regsize() is 8. */
+ for regcache_raw_supply(). This is needed when mips_isa_regsize()
+ is 8. */
static void
supply_32bit_reg (int regnum, const void *addr)
{
char buf[MAX_REGISTER_SIZE];
- store_signed_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regnum),
+ store_signed_integer (buf, register_size (current_gdbarch, regnum),
extract_signed_integer (addr, 4));
- supply_register (regnum, buf);
+ regcache_raw_supply (current_regcache, regnum, buf);
}
/* Unpack an elf_gregset_t into GDB's register cache. */
(char *)(regp + EF_CP0_EPC));
supply_32bit_reg (mips_regnum (current_gdbarch)->badvaddr,
(char *)(regp + EF_CP0_BADVADDR));
- supply_32bit_reg (PS_REGNUM, (char *)(regp + EF_CP0_STATUS));
+ supply_32bit_reg (MIPS_PS_REGNUM, (char *)(regp + EF_CP0_STATUS));
supply_32bit_reg (mips_regnum (current_gdbarch)->cause,
(char *)(regp + EF_CP0_CAUSE));
/* Fill inaccessible registers with zero. */
- supply_register (UNUSED_REGNUM, zerobuf);
- for (regi = FIRST_EMBED_REGNUM; regi < LAST_EMBED_REGNUM; regi++)
- supply_register (regi, zerobuf);
+ regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
+ for (regi = MIPS_FIRST_EMBED_REGNUM;
+ regi < MIPS_LAST_EMBED_REGNUM;
+ regi++)
+ regcache_raw_supply (current_regcache, regi, zerobuf);
}
/* Pack our registers (or one register) into an elf_gregset_t. */
fill_gregset (gregsetp, mips_regnum (current_gdbarch)->hi);
fill_gregset (gregsetp, mips_regnum (current_gdbarch)->pc);
fill_gregset (gregsetp, mips_regnum (current_gdbarch)->badvaddr);
- fill_gregset (gregsetp, PS_REGNUM);
+ fill_gregset (gregsetp, MIPS_PS_REGNUM);
fill_gregset (gregsetp, mips_regnum (current_gdbarch)->cause);
return;
if (regno < 32)
{
dst = regp + regno + EF_REG0;
- regcache_collect (regno, dst);
+ regcache_raw_collect (current_regcache, regno, dst);
return;
}
regaddr = EF_CP0_EPC;
else if (regno == mips_regnum (current_gdbarch)->badvaddr)
regaddr = EF_CP0_BADVADDR;
- else if (regno == PS_REGNUM)
+ else if (regno == MIPS_PS_REGNUM)
regaddr = EF_CP0_STATUS;
else if (regno == mips_regnum (current_gdbarch)->cause)
regaddr = EF_CP0_CAUSE;
if (regaddr != -1)
{
dst = regp + regaddr;
- regcache_collect (regno, dst);
+ regcache_raw_collect (current_regcache, regno, dst);
}
}
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = 0; regi < 32; regi++)
- supply_register (FP0_REGNUM + regi,
- (char *)(*fpregsetp + regi));
+ regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
+ (char *)(*fpregsetp + regi));
- supply_register (mips_regnum (current_gdbarch)->fp_control_status,
- (char *)(*fpregsetp + 32));
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_control_status,
+ (char *)(*fpregsetp + 32));
- /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
- supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision,
- zerobuf);
+ /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_implementation_revision,
+ zerobuf);
}
/* Likewise, pack one or all floating point registers into an
if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32))
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
to = (char *) (*fpregsetp + regno - FP0_REGNUM);
- memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regno - FP0_REGNUM));
+ regcache_raw_collect (current_regcache, regno, to);
}
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
to = (char *) (*fpregsetp + 32);
- memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regno));
+ regcache_raw_collect (current_regcache, regno, to);
}
else if (regno == -1)
{
for (regi = 0; regi < 32; regi++)
fill_fpregset (fpregsetp, FP0_REGNUM + regi);
- fill_fpregset(fpregsetp, mips_regnum (current_gdbarch)->fp_control_status);
+ fill_fpregset (fpregsetp,
+ mips_regnum (current_gdbarch)->fp_control_status);
}
}
/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native GNU/Linux MIPS targets using the struct offsets
- defined in link.h (but without actual reference to that file).
+ structure for native GNU/Linux MIPS targets using the struct
+ offsets defined in link.h (but without actual reference to that
+ file).
- This makes it possible to access GNU/Linux MIPS shared libraries from a
- GDB that was built on a different host platform (for cross debugging). */
+ This makes it possible to access GNU/Linux MIPS shared libraries
+ from a GDB that was built on a different host platform (for cross
+ debugging). */
static struct link_map_offsets *
mips_linux_svr4_fetch_link_map_offsets (void)
-{
+{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
if (lmp == NULL)
- {
+ {
lmp = &lmo;
lmo.r_debug_size = 8; /* The actual size is 20 bytes, but
#define MIPS64_EF_SIZE 304
/* Figure out where the longjmp will land.
- We expect the first arg to be a pointer to the jmp_buf structure from
- which we extract the pc (MIPS_LINUX_JB_PC) that we will land at. The pc
- is copied into PC. This routine returns 1 on success. */
+ We expect the first arg to be a pointer to the jmp_buf structure
+ from which we extract the pc (MIPS_LINUX_JB_PC) that we will land
+ at. The pc is copied into PC. This routine returns 1 on
+ success. */
/* Details about jmp_buf. */
void *buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
int element_size = TARGET_PTR_BIT == 32 ? 4 : 8;
- jb_addr = read_register (A0_REGNUM);
+ jb_addr = read_register (MIPS_A0_REGNUM);
if (target_read_memory (jb_addr + MIPS64_LINUX_JB_PC * element_size,
buf, TARGET_PTR_BIT / TARGET_CHAR_BIT))
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = MIPS64_EF_REG0; regi <= MIPS64_EF_REG31; regi++)
- supply_register ((regi - MIPS64_EF_REG0), (char *)(regp + regi));
-
- supply_register (mips_regnum (current_gdbarch)->lo,
- (char *)(regp + MIPS64_EF_LO));
- supply_register (mips_regnum (current_gdbarch)->hi,
- (char *)(regp + MIPS64_EF_HI));
-
- supply_register (mips_regnum (current_gdbarch)->pc,
- (char *)(regp + MIPS64_EF_CP0_EPC));
- supply_register (mips_regnum (current_gdbarch)->badvaddr,
- (char *)(regp + MIPS64_EF_CP0_BADVADDR));
- supply_register (PS_REGNUM, (char *)(regp + MIPS64_EF_CP0_STATUS));
- supply_register (mips_regnum (current_gdbarch)->cause,
- (char *)(regp + MIPS64_EF_CP0_CAUSE));
+ regcache_raw_supply (current_regcache, (regi - MIPS64_EF_REG0),
+ (char *)(regp + regi));
+
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->lo,
+ (char *) (regp + MIPS64_EF_LO));
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->hi,
+ (char *) (regp + MIPS64_EF_HI));
+
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->pc,
+ (char *) (regp + MIPS64_EF_CP0_EPC));
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->badvaddr,
+ (char *) (regp + MIPS64_EF_CP0_BADVADDR));
+ regcache_raw_supply (current_regcache, MIPS_PS_REGNUM,
+ (char *) (regp + MIPS64_EF_CP0_STATUS));
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->cause,
+ (char *) (regp + MIPS64_EF_CP0_CAUSE));
/* Fill inaccessible registers with zero. */
- supply_register (UNUSED_REGNUM, zerobuf);
- for (regi = FIRST_EMBED_REGNUM; regi < LAST_EMBED_REGNUM; regi++)
- supply_register (regi, zerobuf);
+ regcache_raw_supply (current_regcache, MIPS_UNUSED_REGNUM, zerobuf);
+ for (regi = MIPS_FIRST_EMBED_REGNUM;
+ regi < MIPS_LAST_EMBED_REGNUM;
+ regi++)
+ regcache_raw_supply (current_regcache, regi, zerobuf);
}
/* Pack our registers (or one register) into an elf_gregset_t. */
mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->lo);
mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->hi);
mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->pc);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->badvaddr);
- mips64_fill_gregset (gregsetp, PS_REGNUM);
- mips64_fill_gregset (gregsetp, mips_regnum (current_gdbarch)->cause);
+ mips64_fill_gregset (gregsetp,
+ mips_regnum (current_gdbarch)->badvaddr);
+ mips64_fill_gregset (gregsetp, MIPS_PS_REGNUM);
+ mips64_fill_gregset (gregsetp,
+ mips_regnum (current_gdbarch)->cause);
return;
}
if (regno < 32)
{
dst = regp + regno + MIPS64_EF_REG0;
- regcache_collect (regno, dst);
+ regcache_raw_collect (current_regcache, regno, dst);
return;
}
regaddr = MIPS64_EF_CP0_EPC;
else if (regno == mips_regnum (current_gdbarch)->badvaddr)
regaddr = MIPS64_EF_CP0_BADVADDR;
- else if (regno == PS_REGNUM)
+ else if (regno == MIPS_PS_REGNUM)
regaddr = MIPS64_EF_CP0_STATUS;
else if (regno == mips_regnum (current_gdbarch)->cause)
regaddr = MIPS64_EF_CP0_CAUSE;
if (regaddr != -1)
{
dst = regp + regaddr;
- regcache_collect (regno, dst);
+ regcache_raw_collect (current_regcache, regno, dst);
}
}
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = 0; regi < 32; regi++)
- supply_register (FP0_REGNUM + regi,
- (char *)(*fpregsetp + regi));
+ regcache_raw_supply (current_regcache, FP0_REGNUM + regi,
+ (char *)(*fpregsetp + regi));
- supply_register (mips_regnum (current_gdbarch)->fp_control_status,
- (char *)(*fpregsetp + 32));
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_control_status,
+ (char *)(*fpregsetp + 32));
- /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
- supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision,
- zerobuf);
+ /* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
+ regcache_raw_supply (current_regcache,
+ mips_regnum (current_gdbarch)->fp_implementation_revision,
+ zerobuf);
}
/* Likewise, pack one or all floating point registers into an
if ((regno >= FP0_REGNUM) && (regno < FP0_REGNUM + 32))
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
to = (char *) (*fpregsetp + regno - FP0_REGNUM);
- memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regno - FP0_REGNUM));
+ regcache_raw_collect (current_regcache, regno, to);
}
else if (regno == mips_regnum (current_gdbarch)->fp_control_status)
{
- from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regno)];
to = (char *) (*fpregsetp + 32);
- memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regno));
+ regcache_raw_collect (current_regcache, regno, to);
}
else if (regno == -1)
{
}
else if (core_reg_size == sizeof (fpregset64))
{
- memcpy ((char *) &fpregset64, core_reg_sect, sizeof (fpregset64));
+ memcpy ((char *) &fpregset64, core_reg_sect,
+ sizeof (fpregset64));
mips64_supply_fpregset (&fpregset64);
}
else
};
/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for native GNU/Linux MIPS targets using the struct offsets
- defined in link.h (but without actual reference to that file).
+ structure for native GNU/Linux MIPS targets using the struct
+ offsets defined in link.h (but without actual reference to that
+ file).
- This makes it possible to access GNU/Linux MIPS shared libraries from a
- GDB that was built on a different host platform (for cross debugging). */
+ This makes it possible to access GNU/Linux MIPS shared libraries
+ from a GDB that was built on a different host platform (for cross
+ debugging). */
static struct link_map_offsets *
mips64_linux_svr4_fetch_link_map_offsets (void)
-{
+{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
if (lmp == NULL)
- {
+ {
lmp = &lmo;
lmo.r_debug_size = 16; /* The actual size is 40 bytes, but
return lmp;
}
-/* Handle for obtaining pointer to the current register_addr() function
- for a given architecture. */
+/* Handle for obtaining pointer to the current register_addr()
+ function for a given architecture. */
static struct gdbarch_data *register_addr_data;
CORE_ADDR
static void
set_mips_linux_register_addr (struct gdbarch *gdbarch,
- CORE_ADDR (*register_addr_ptr) (int, CORE_ADDR))
+ CORE_ADDR (*register_addr_ptr) (int,
+ CORE_ADDR))
{
- set_gdbarch_data (gdbarch, register_addr_data, register_addr_ptr);
+ deprecated_set_gdbarch_data (gdbarch, register_addr_data,
+ register_addr_ptr);
}
static void *
return 0;
}
-/* Check the code at PC for a dynamic linker lazy resolution stub. Because
- they aren't in the .plt section, we pattern-match on the code generated
- by GNU ld. They look like this:
+/* Check the code at PC for a dynamic linker lazy resolution stub.
+ Because they aren't in the .plt section, we pattern-match on the
+ code generated by GNU ld. They look like this:
lw t9,0x8010(gp)
addu t7,ra
jalr t9,ra
addiu t8,zero,INDEX
- (with the appropriate doubleword instructions for N64). Also return the
- dynamic symbol index used in the last instruction. */
+ (with the appropriate doubleword instructions for N64). Also
+ return the dynamic symbol index used in the last instruction. */
static int
mips_linux_in_dynsym_stub (CORE_ADDR pc, char *name)
if (insn != 0x03e07821)
return 0;
}
-
+
insn = extract_unsigned_integer (p + 8, 4);
/* jalr t9,ra */
if (insn != 0x0320f809)
return (insn & 0xffff);
}
-/* Return non-zero iff PC belongs to the dynamic linker resolution code
- or to a stub. */
+/* Return non-zero iff PC belongs to the dynamic linker resolution
+ code or to a stub. */
int
mips_linux_in_dynsym_resolve_code (CORE_ADDR pc)
{
- /* Check whether PC is in the dynamic linker. This also checks whether
- it is in the .plt section, which MIPS does not use. */
+ /* Check whether PC is in the dynamic linker. This also checks
+ whether it is in the .plt section, which MIPS does not use. */
if (in_solib_dynsym_resolve_code (pc))
return 1;
- /* Pattern match for the stub. It would be nice if there were a more
- efficient way to avoid this check. */
+ /* Pattern match for the stub. It would be nice if there were a
+ more efficient way to avoid this check. */
if (mips_linux_in_dynsym_stub (pc, NULL))
return 1;
resolver = lookup_minimal_symbol ("__dl_runtime_resolve", NULL, NULL);
if (resolver && SYMBOL_VALUE_ADDRESS (resolver) == pc)
- return frame_pc_unwind (get_current_frame ());
+ return frame_pc_unwind (get_current_frame ());
return 0;
-}
+}
+
+/* Signal trampoline support. There are four supported layouts for a
+ signal frame: o32 sigframe, o32 rt_sigframe, n32 rt_sigframe, and
+ n64 rt_sigframe. We handle them all independently; not the most
+ efficient way, but simplest. First, declare all the unwinders. */
+
+static void mips_linux_o32_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func);
+
+static void mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func);
+
+#define MIPS_NR_LINUX 4000
+#define MIPS_NR_N64_LINUX 5000
+#define MIPS_NR_N32_LINUX 6000
+
+#define MIPS_NR_sigreturn MIPS_NR_LINUX + 119
+#define MIPS_NR_rt_sigreturn MIPS_NR_LINUX + 193
+#define MIPS_NR_N64_rt_sigreturn MIPS_NR_N64_LINUX + 211
+#define MIPS_NR_N32_rt_sigreturn MIPS_NR_N32_LINUX + 211
+
+#define MIPS_INST_LI_V0_SIGRETURN 0x24020000 + MIPS_NR_sigreturn
+#define MIPS_INST_LI_V0_RT_SIGRETURN 0x24020000 + MIPS_NR_rt_sigreturn
+#define MIPS_INST_LI_V0_N64_RT_SIGRETURN 0x24020000 + MIPS_NR_N64_rt_sigreturn
+#define MIPS_INST_LI_V0_N32_RT_SIGRETURN 0x24020000 + MIPS_NR_N32_rt_sigreturn
+#define MIPS_INST_SYSCALL 0x0000000c
+
+static const struct tramp_frame mips_linux_o32_sigframe = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { MIPS_INST_LI_V0_SIGRETURN, -1 },
+ { MIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_o32_sigframe_init
+};
+
+static const struct tramp_frame mips_linux_o32_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { MIPS_INST_LI_V0_RT_SIGRETURN, -1 },
+ { MIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 } },
+ mips_linux_o32_sigframe_init
+};
+
+static const struct tramp_frame mips_linux_n32_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { MIPS_INST_LI_V0_N32_RT_SIGRETURN, -1 },
+ { MIPS_INST_SYSCALL, -1 },
+ { TRAMP_SENTINEL_INSN, -1 }
+ },
+ mips_linux_n32n64_sigframe_init
+};
+
+static const struct tramp_frame mips_linux_n64_rt_sigframe = {
+ SIGTRAMP_FRAME,
+ 4,
+ { MIPS_INST_LI_V0_N64_RT_SIGRETURN,
+ MIPS_INST_SYSCALL,
+ TRAMP_SENTINEL_INSN },
+ mips_linux_n32n64_sigframe_init
+};
+
+/* *INDENT-OFF* */
+/* The unwinder for o32 signal frames. The legacy structures look
+ like this:
+
+ struct sigframe {
+ u32 sf_ass[4]; [argument save space for o32]
+ u32 sf_code[2]; [signal trampoline]
+ struct sigcontext sf_sc;
+ sigset_t sf_mask;
+ };
+
+ struct sigcontext {
+ unsigned int sc_regmask; [Unused]
+ unsigned int sc_status;
+ unsigned long long sc_pc;
+ unsigned long long sc_regs[32];
+ unsigned long long sc_fpregs[32];
+ unsigned int sc_ownedfp;
+ unsigned int sc_fpc_csr;
+ unsigned int sc_fpc_eir; [Unused]
+ unsigned int sc_used_math;
+ unsigned int sc_ssflags; [Unused]
+ [Alignment hole of four bytes]
+ unsigned long long sc_mdhi;
+ unsigned long long sc_mdlo;
+
+ unsigned int sc_cause; [Unused]
+ unsigned int sc_badvaddr; [Unused]
+
+ unsigned long sc_sigset[4]; [kernel's sigset_t]
+ };
+
+ The RT signal frames look like this:
+
+ struct rt_sigframe {
+ u32 rs_ass[4]; [argument save space for o32]
+ u32 rs_code[2] [signal trampoline]
+ struct siginfo rs_info;
+ struct ucontext rs_uc;
+ };
+
+ struct ucontext {
+ unsigned long uc_flags;
+ struct ucontext *uc_link;
+ stack_t uc_stack;
+ [Alignment hole of four bytes]
+ struct sigcontext uc_mcontext;
+ sigset_t uc_sigmask;
+ }; */
+/* *INDENT-ON* */
+
+#define SIGFRAME_CODE_OFFSET (4 * 4)
+#define SIGFRAME_SIGCONTEXT_OFFSET (6 * 4)
+
+#define RTSIGFRAME_SIGINFO_SIZE 128
+#define STACK_T_SIZE (3 * 4)
+#define UCONTEXT_SIGCONTEXT_OFFSET (2 * 4 + STACK_T_SIZE + 4)
+#define RTSIGFRAME_SIGCONTEXT_OFFSET (SIGFRAME_SIGCONTEXT_OFFSET \
+ + RTSIGFRAME_SIGINFO_SIZE \
+ + UCONTEXT_SIGCONTEXT_OFFSET)
+
+#define SIGCONTEXT_PC (1 * 8)
+#define SIGCONTEXT_REGS (2 * 8)
+#define SIGCONTEXT_FPREGS (34 * 8)
+#define SIGCONTEXT_FPCSR (66 * 8 + 4)
+#define SIGCONTEXT_HI (69 * 8)
+#define SIGCONTEXT_LO (70 * 8)
+#define SIGCONTEXT_CAUSE (71 * 8 + 0)
+#define SIGCONTEXT_BADVADDR (71 * 8 + 4)
+
+#define SIGCONTEXT_REG_SIZE 8
+
+static void
+mips_linux_o32_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ int ireg, reg_position;
+ CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
+ const struct mips_regnum *regs = mips_regnum (current_gdbarch);
+
+ if (self == &mips_linux_o32_sigframe)
+ sigcontext_base += SIGFRAME_SIGCONTEXT_OFFSET;
+ else
+ sigcontext_base += RTSIGFRAME_SIGCONTEXT_OFFSET;
+
+ /* I'm not proud of this hack. Eventually we will have the
+ infrastructure to indicate the size of saved registers on a
+ per-frame basis, but right now we don't; the kernel saves eight
+ bytes but we only want four. */
+ if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
+ sigcontext_base += 4;
+
+#if 0
+ trad_frame_set_reg_addr (this_cache, ORIG_ZERO_REGNUM + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_REGS);
+#endif
+
+ for (ireg = 1; ireg < 32; ireg++)
+ trad_frame_set_reg_addr (this_cache,
+ ireg + MIPS_ZERO_REGNUM + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_REGS
+ + ireg * SIGCONTEXT_REG_SIZE);
+
+ for (ireg = 0; ireg < 32; ireg++)
+ trad_frame_set_reg_addr (this_cache, ireg + regs->fp0 + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_FPREGS
+ + ireg * SIGCONTEXT_REG_SIZE);
+
+ trad_frame_set_reg_addr (this_cache, regs->pc + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_PC);
+
+ trad_frame_set_reg_addr (this_cache,
+ regs->fp_control_status + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_FPCSR);
+ trad_frame_set_reg_addr (this_cache, regs->hi + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_HI);
+ trad_frame_set_reg_addr (this_cache, regs->lo + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_LO);
+ trad_frame_set_reg_addr (this_cache, regs->cause + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_CAUSE);
+ trad_frame_set_reg_addr (this_cache, regs->badvaddr + NUM_REGS,
+ sigcontext_base + SIGCONTEXT_BADVADDR);
+
+ /* Choice of the bottom of the sigframe is somewhat arbitrary. */
+ trad_frame_set_id (this_cache,
+ frame_id_build (func - SIGFRAME_CODE_OFFSET,
+ func));
+}
+
+/* *INDENT-OFF* */
+/* For N32/N64 things look different. There is no non-rt signal frame.
+
+ struct rt_sigframe_n32 {
+ u32 rs_ass[4]; [ argument save space for o32 ]
+ u32 rs_code[2]; [ signal trampoline ]
+ struct siginfo rs_info;
+ struct ucontextn32 rs_uc;
+ };
+
+ struct ucontextn32 {
+ u32 uc_flags;
+ s32 uc_link;
+ stack32_t uc_stack;
+ struct sigcontext uc_mcontext;
+ sigset_t uc_sigmask; [ mask last for extensibility ]
+ };
+
+ struct rt_sigframe_n32 {
+ u32 rs_ass[4]; [ argument save space for o32 ]
+ u32 rs_code[2]; [ signal trampoline ]
+ struct siginfo rs_info;
+ struct ucontext rs_uc;
+ };
+
+ struct ucontext {
+ unsigned long uc_flags;
+ struct ucontext *uc_link;
+ stack_t uc_stack;
+ struct sigcontext uc_mcontext;
+ sigset_t uc_sigmask; [ mask last for extensibility ]
+ };
+
+ And the sigcontext is different (this is for both n32 and n64):
+
+ struct sigcontext {
+ unsigned long long sc_regs[32];
+ unsigned long long sc_fpregs[32];
+ unsigned long long sc_mdhi;
+ unsigned long long sc_mdlo;
+ unsigned long long sc_pc;
+ unsigned int sc_status;
+ unsigned int sc_fpc_csr;
+ unsigned int sc_fpc_eir;
+ unsigned int sc_used_math;
+ unsigned int sc_cause;
+ unsigned int sc_badvaddr;
+ }; */
+/* *INDENT-ON* */
+
+#define N32_STACK_T_SIZE STACK_T_SIZE
+#define N64_STACK_T_SIZE (2 * 8 + 4)
+#define N32_UCONTEXT_SIGCONTEXT_OFFSET (2 * 4 + N32_STACK_T_SIZE + 4)
+#define N64_UCONTEXT_SIGCONTEXT_OFFSET (2 * 8 + N64_STACK_T_SIZE + 4)
+#define N32_SIGFRAME_SIGCONTEXT_OFFSET (SIGFRAME_SIGCONTEXT_OFFSET \
+ + RTSIGFRAME_SIGINFO_SIZE \
+ + N32_UCONTEXT_SIGCONTEXT_OFFSET)
+#define N64_SIGFRAME_SIGCONTEXT_OFFSET (SIGFRAME_SIGCONTEXT_OFFSET \
+ + RTSIGFRAME_SIGINFO_SIZE \
+ + N64_UCONTEXT_SIGCONTEXT_OFFSET)
+
+#define N64_SIGCONTEXT_REGS (0 * 8)
+#define N64_SIGCONTEXT_FPREGS (32 * 8)
+#define N64_SIGCONTEXT_HI (64 * 8)
+#define N64_SIGCONTEXT_LO (65 * 8)
+#define N64_SIGCONTEXT_PC (66 * 8)
+#define N64_SIGCONTEXT_FPCSR (67 * 8 + 1 * 4)
+#define N64_SIGCONTEXT_FIR (67 * 8 + 2 * 4)
+#define N64_SIGCONTEXT_CAUSE (67 * 8 + 4 * 4)
+#define N64_SIGCONTEXT_BADVADDR (67 * 8 + 5 * 4)
+
+#define N64_SIGCONTEXT_REG_SIZE 8
+
+static void
+mips_linux_n32n64_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *next_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ int ireg, reg_position;
+ CORE_ADDR sigcontext_base = func - SIGFRAME_CODE_OFFSET;
+ const struct mips_regnum *regs = mips_regnum (current_gdbarch);
+
+ if (self == &mips_linux_n32_rt_sigframe)
+ sigcontext_base += N32_SIGFRAME_SIGCONTEXT_OFFSET;
+ else
+ sigcontext_base += N64_SIGFRAME_SIGCONTEXT_OFFSET;
+
+#if 0
+ trad_frame_set_reg_addr (this_cache, ORIG_ZERO_REGNUM + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_REGS);
+#endif
+
+ for (ireg = 1; ireg < 32; ireg++)
+ trad_frame_set_reg_addr (this_cache,
+ ireg + MIPS_ZERO_REGNUM + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_REGS
+ + ireg * N64_SIGCONTEXT_REG_SIZE);
+
+ for (ireg = 0; ireg < 32; ireg++)
+ trad_frame_set_reg_addr (this_cache, ireg + regs->fp0 + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_FPREGS
+ + ireg * N64_SIGCONTEXT_REG_SIZE);
+
+ trad_frame_set_reg_addr (this_cache, regs->pc + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_PC);
+
+ trad_frame_set_reg_addr (this_cache,
+ regs->fp_control_status + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_FPCSR);
+ trad_frame_set_reg_addr (this_cache, regs->hi + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_HI);
+ trad_frame_set_reg_addr (this_cache, regs->lo + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_LO);
+ trad_frame_set_reg_addr (this_cache, regs->cause + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_CAUSE);
+ trad_frame_set_reg_addr (this_cache, regs->badvaddr + NUM_REGS,
+ sigcontext_base + N64_SIGCONTEXT_BADVADDR);
+
+ /* Choice of the bottom of the sigframe is somewhat arbitrary. */
+ trad_frame_set_id (this_cache,
+ frame_id_build (func - SIGFRAME_CODE_OFFSET,
+ func));
+}
+
+/* Initialize one of the GNU/Linux OS ABIs. */
static void
-mips_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+mips_linux_init_abi (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum mips_abi abi = mips_abi (gdbarch);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips_linux_register_addr);
+ tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_sigframe);
+ tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_rt_sigframe);
break;
case MIPS_ABI_N32:
set_gdbarch_get_longjmp_target (gdbarch,
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
+ tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n32_rt_sigframe);
break;
case MIPS_ABI_N64:
set_gdbarch_get_longjmp_target (gdbarch,
set_solib_svr4_fetch_link_map_offsets
(gdbarch, mips64_linux_svr4_fetch_link_map_offsets);
set_mips_linux_register_addr (gdbarch, mips64_linux_register_addr);
+ tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n64_rt_sigframe);
break;
default:
internal_error (__FILE__, __LINE__, "can't handle ABI");
set_gdbarch_skip_solib_resolver (gdbarch, mips_linux_skip_resolver);
- /* This overrides the MIPS16 stub support from mips-tdep. But no
- one uses MIPS16 on GNU/Linux yet, so this isn't much of a loss. */
- set_gdbarch_in_solib_call_trampoline (gdbarch, mips_linux_in_dynsym_stub);
+ set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
}
void
const struct bfd_arch_info *arch_info;
register_addr_data =
- register_gdbarch_data (init_register_addr_data);
+ gdbarch_data_register_post_init (init_register_addr_data);
for (arch_info = bfd_lookup_arch (bfd_arch_mips, 0);
arch_info != NULL;
arch_info = arch_info->next)
{
- gdbarch_register_osabi (bfd_arch_mips, arch_info->mach, GDB_OSABI_LINUX,
+ gdbarch_register_osabi (bfd_arch_mips, arch_info->mach,
+ GDB_OSABI_LINUX,
mips_linux_init_abi);
}
- add_core_fns (®set_core_fns);
+ deprecated_add_core_fns (®set_core_fns);
}