From 613e114ff9d8c0f2bbe5177ef94f702123bb8885 Mon Sep 17 00:00:00 2001 From: Andrew Cagney Date: Sat, 30 Oct 2004 22:36:34 +0000 Subject: 2004-10-30 Andrew Cagney * mips-tdep.h: Add comments on registers. (MIPS_UNUSED_REGNUM): Define. * config/mips/tm-mips.h (ZERO_REGNUM, UNUSED_REGNUM) (T9_REGNUM, V0_REGNUM, A0_REGNUM): Delete. * irix5-nat.c, mipsv4-nat.c, mips-linux-tdep.c: Update. * mips-linux-nat.c, remote-mips.c: Update. --- gdb/mips-tdep.h | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) (limited to 'gdb/mips-tdep.h') diff --git a/gdb/mips-tdep.h b/gdb/mips-tdep.h index 404ec7d76c7..9dac4c2946a 100644 --- a/gdb/mips-tdep.h +++ b/gdb/mips-tdep.h @@ -61,13 +61,20 @@ struct mips_regnum }; extern const struct mips_regnum *mips_regnum (struct gdbarch *gdbarch); +/* Register numbers of various important registers. Note that some of + these values are "real" register numbers, and correspond to the + general registers of the machine, and some are "phony" register + numbers which are too large to be actual register numbers as far as + the user is concerned but do serve to get the desired values when + passed to read_register. */ + enum { - MIPS_ZERO_REGNUM = 0, + MIPS_ZERO_REGNUM = 0, /* Read-only register, always 0. */ MIPS_AT_REGNUM = 1, - MIPS_V0_REGNUM = 2, - MIPS_A0_REGNUM = 4, - MIPS_T9_REGNUM = 25, + MIPS_V0_REGNUM = 2, /* Function integer return value. */ + MIPS_A0_REGNUM = 4, /* Loc of first arg during a subr call */ + MIPS_T9_REGNUM = 25, /* Contains address of callee in PIC. */ MIPS_SP_REGNUM = 29, MIPS_RA_REGNUM = 31, MIPS_EMBED_LO_REGNUM = 33, @@ -75,7 +82,8 @@ enum MIPS_EMBED_BADVADDR_REGNUM = 35, MIPS_EMBED_CAUSE_REGNUM = 36, MIPS_EMBED_PC_REGNUM = 37, - MIPS_EMBED_FP0_REGNUM = 38 + MIPS_EMBED_FP0_REGNUM = 38, + MIPS_UNUSED_REGNUM = 73 /* Never used, FIXME */ }; /* Defined in mips-tdep.c and used in remote-mips.c */ -- cgit v1.2.1