diff options
Diffstat (limited to 'gdb/m68klinux-tdep.c')
| -rw-r--r-- | gdb/m68klinux-tdep.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/gdb/m68klinux-tdep.c b/gdb/m68klinux-tdep.c index 752e58e..8b9193d 100644 --- a/gdb/m68klinux-tdep.c +++ b/gdb/m68klinux-tdep.c @@ -26,6 +26,7 @@ #include "target.h" #include "gdb_string.h" #include "gdbtypes.h" +#include "osabi.h" #include "m68k-tdep.h" /* Check whether insn1 and insn2 are parts of a signal trampoline. */ @@ -68,8 +69,8 @@ m68k_linux_in_sigtramp (CORE_ADDR pc) if (IS_RT_SIGTRAMP (insn0, insn1)) return 2; - insn0 = (insn0 << 16) | (insn1 >> 16); - insn1 = (insn1 << 16) | (insn2 >> 16); + insn0 = ((insn0 << 16) & 0xffffffff) | (insn1 >> 16); + insn1 = ((insn1 << 16) & 0xffffffff) | (insn2 >> 16); if (IS_SIGTRAMP (insn0, insn1)) return 1; if (IS_RT_SIGTRAMP (insn0, insn1)) @@ -118,7 +119,7 @@ m68k_linux_sigtramp_saved_pc (struct frame_info *frame) /* Return the saved program counter for FRAME. */ -CORE_ADDR +static CORE_ADDR m68k_linux_frame_saved_pc (struct frame_info *frame) { if (get_frame_type (frame) == SIGTRAMP_FRAME) @@ -127,7 +128,15 @@ m68k_linux_frame_saved_pc (struct frame_info *frame) return read_memory_unsigned_integer (get_frame_base (frame) + 4, 4); } -void +/* The following definitions are appropriate when using the ELF + format, where floating point values are returned in fp0, pointer + values in a0 and other values in d0. */ + +/* Extract from an array REGBUF containing the (raw) register state a + function return value of type TYPE, and copy that, in virtual + format, into VALBUF. */ + +static void m68k_linux_extract_return_value (struct type *type, char *regbuf, char *valbuf) { if (TYPE_CODE (type) == TYPE_CODE_FLT) @@ -145,7 +154,10 @@ m68k_linux_extract_return_value (struct type *type, char *regbuf, char *valbuf) TYPE_LENGTH (type)); } -void +/* Write into appropriate registers a function return value of type + TYPE, given in virtual format. */ + +static void m68k_linux_store_return_value (struct type *type, char *valbuf) { if (TYPE_CODE (type) == TYPE_CODE_FLT) @@ -164,8 +176,32 @@ m68k_linux_store_return_value (struct type *type, char *valbuf) } } -CORE_ADDR +/* Extract from an array REGBUF containing the (raw) register state + the address in which a function should return its structure value, + as a CORE_ADDR. */ + +static CORE_ADDR m68k_linux_extract_struct_value_address (char *regbuf) { return *(CORE_ADDR *) (regbuf + REGISTER_BYTE (M68K_A0_REGNUM)); } + +static void +m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) +{ + set_gdbarch_deprecated_frame_saved_pc (gdbarch, + m68k_linux_frame_saved_pc); + set_gdbarch_deprecated_extract_return_value (gdbarch, + m68k_linux_extract_return_value); + set_gdbarch_deprecated_store_return_value (gdbarch, + m68k_linux_store_return_value); + set_gdbarch_deprecated_extract_struct_value_address (gdbarch, + m68k_linux_extract_struct_value_address); +} + +void +_initialize_m68k_linux_tdep (void) +{ + gdbarch_register_osabi (bfd_arch_m68k, 0, GDB_OSABI_LINUX, + m68k_linux_init_abi); +} |