diff options
Diffstat (limited to 'gdb/mips-linux-tdep.c')
| -rw-r--r-- | gdb/mips-linux-tdep.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c index be346d75844..c78d5d649f1 100644 --- a/gdb/mips-linux-tdep.c +++ b/gdb/mips-linux-tdep.c @@ -40,6 +40,7 @@ #include "mips-linux-tdep.h" #include "glibc-tdep.h" #include "linux-tdep.h" +#include "xml-syscall.h" static struct target_so_ops mips_svr4_so_ops; @@ -1207,6 +1208,38 @@ mips_linux_syscall_next_pc (struct frame_info *frame) return pc + 4; } +/* Return the current system call's number present in the + v0 register. When the function fails, it returns -1. */ + +static LONGEST +mips_linux_get_syscall_number (struct gdbarch *gdbarch, + ptid_t ptid) +{ + struct regcache *regcache = get_thread_regcache (ptid); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + int regsize = register_size (gdbarch, MIPS_V0_REGNUM); + /* The content of a register */ + gdb_byte buf[8]; + /* The result */ + LONGEST ret; + + /* Make sure we're in a known ABI */ + gdb_assert (tdep->mips_abi == MIPS_ABI_O32 + || tdep->mips_abi == MIPS_ABI_N32 + || tdep->mips_abi == MIPS_ABI_N64); + + gdb_assert (regsize <= sizeof (buf)); + + /* Getting the system call number from the register. + syscall number is in v0 or $2. */ + regcache_cooked_read (regcache, MIPS_V0_REGNUM, buf); + + ret = extract_signed_integer (buf, regsize, byte_order); + + return ret; +} + /* Initialize one of the GNU/Linux OS ABIs. */ static void @@ -1219,6 +1252,9 @@ mips_linux_init_abi (struct gdbarch_info info, linux_init_abi (info, gdbarch); + /* Get the syscall number from the arch's register. */ + set_gdbarch_get_syscall_number (gdbarch, mips_linux_get_syscall_number); + switch (abi) { case MIPS_ABI_O32: @@ -1228,6 +1264,7 @@ mips_linux_init_abi (struct gdbarch_info info, (gdbarch, svr4_ilp32_fetch_link_map_offsets); tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_sigframe); tramp_frame_prepend_unwinder (gdbarch, &mips_linux_o32_rt_sigframe); + set_xml_syscall_file_name ("syscalls/mips-o32-linux.xml"); break; case MIPS_ABI_N32: set_gdbarch_get_longjmp_target (gdbarch, @@ -1241,6 +1278,7 @@ mips_linux_init_abi (struct gdbarch_info info, does not distinguish between quiet and signalling NaNs). */ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n32_rt_sigframe); + set_xml_syscall_file_name ("syscalls/mips-n32-linux.xml"); break; case MIPS_ABI_N64: set_gdbarch_get_longjmp_target (gdbarch, @@ -1254,6 +1292,7 @@ mips_linux_init_abi (struct gdbarch_info info, does not distinguish between quiet and signalling NaNs). */ set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); tramp_frame_prepend_unwinder (gdbarch, &mips_linux_n64_rt_sigframe); + set_xml_syscall_file_name ("syscalls/mips-n64-linux.xml"); break; default: break; |