From: Andrew Cagney Date: Thu, 31 Jul 2003 21:42:39 +0000 (+0000) Subject: 2003-07-31 Andrew Cagney X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6302298482a57a625399947705ae2b3981b07d20;p=binutils-gdb.git 2003-07-31 Andrew Cagney * user-regs.c (struct user_reg): Add "next" link. (struct user_regs): Replace "user" with "first" and "last" links. (append_user_reg): Add pre-allocated "reg" parameter. (builtin_user_regs): Provide initial value for "last". (user_reg_add_builtin): XMALLOC memory for append_user_reg. (user_regs_init): Allocate memory from the gdbarch obstack. (user_reg_add): GDBARCH_OBSTACK_ZALLOC memory for append_user_reg. (user_reg_map_name_to_regnum): Rewrite to search the user_reg linked list. (usernum_to_user_reg): New function. (user_reg_map_regnum_to_name): Use usernum_to_user_reg. (value_of_user_reg): Use usernum_to_user_reg. (user_regs_free): Delete function. (_initialize_user_regs): Update register_gdbarch_data call. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 6e77d9cb2cf..6765475a619 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,20 @@ +2003-07-31 Andrew Cagney + + * user-regs.c (struct user_reg): Add "next" link. + (struct user_regs): Replace "user" with "first" and "last" links. + (append_user_reg): Add pre-allocated "reg" parameter. + (builtin_user_regs): Provide initial value for "last". + (user_reg_add_builtin): XMALLOC memory for append_user_reg. + (user_regs_init): Allocate memory from the gdbarch obstack. + (user_reg_add): GDBARCH_OBSTACK_ZALLOC memory for append_user_reg. + (user_reg_map_name_to_regnum): Rewrite to search the user_reg + linked list. + (usernum_to_user_reg): New function. + (user_reg_map_regnum_to_name): Use usernum_to_user_reg. + (value_of_user_reg): Use usernum_to_user_reg. + (user_regs_free): Delete function. + (_initialize_user_regs): Update register_gdbarch_data call. + 2003-07-31 Daniel Jacobowitz * dwarf2read.c (new_symbol): Use var_decode_location for parameters. diff --git a/gdb/user-regs.c b/gdb/user-regs.c index 3d60b2f90f6..8b4600d4338 100644 --- a/gdb/user-regs.c +++ b/gdb/user-regs.c @@ -42,33 +42,39 @@ struct user_reg { const char *name; struct value *(*read) (struct frame_info * frame); + struct user_reg *next; }; struct user_regs { - struct user_reg *user; - int nr; + struct user_reg *first; + struct user_reg **last; }; static void -append_user_reg (struct user_regs *regs, - const char *name, user_reg_read_ftype *read) +append_user_reg (struct user_regs *regs, const char *name, + user_reg_read_ftype *read, struct user_reg *reg) { - regs->nr++; - regs->user = xrealloc (regs->user, - regs->nr * sizeof (struct user_reg)); - regs->user[regs->nr - 1].name = name; - regs->user[regs->nr - 1].read = read; + /* The caller is responsible for allocating memory needed to store + the register. By doing this, the function can operate on a + register list stored in the common heap or a specific obstack. */ + gdb_assert (reg != NULL); + reg->name = name; + reg->read = read; + reg->next = NULL; + (*regs->last) = reg; + regs->last = &(*regs->last)->next; } /* An array of the builtin user registers. */ -static struct user_regs builtin_user_regs; +static struct user_regs builtin_user_regs = { NULL, &builtin_user_regs.first }; void user_reg_add_builtin (const char *name, user_reg_read_ftype *read) { - append_user_reg (&builtin_user_regs, name, read); + append_user_reg (&builtin_user_regs, name, read, + XMALLOC (struct user_reg)); } /* Per-architecture user registers. Start with the builtin user @@ -79,23 +85,15 @@ static struct gdbarch_data *user_regs_data; static void * user_regs_init (struct gdbarch *gdbarch) { - int i; - struct user_regs *regs = XMALLOC (struct user_regs); - memset (regs, 0, sizeof (struct user_regs)); - for (i = 0; i < builtin_user_regs.nr; i++) - append_user_reg (regs, builtin_user_regs.user[i].name, - builtin_user_regs.user[i].read); + struct user_reg *reg; + struct user_regs *regs = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_regs); + regs->last = ®s->first; + for (reg = builtin_user_regs.first; reg != NULL; reg = reg->next) + append_user_reg (regs, reg->name, reg->read, + GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg)); return regs; } -static void -user_regs_free (struct gdbarch *gdbarch, void *data) -{ - struct user_regs *regs = data; - xfree (regs->user); - xfree (regs); -} - void user_reg_add (struct gdbarch *gdbarch, const char *name, user_reg_read_ftype *read) @@ -108,7 +106,8 @@ user_reg_add (struct gdbarch *gdbarch, const char *name, regs = user_regs_init (gdbarch); set_gdbarch_data (gdbarch, user_regs_data, regs); } - append_user_reg (regs, name, read); + append_user_reg (regs, name, read, + GDBARCH_OBSTACK_ZALLOC (gdbarch, struct user_reg)); } int @@ -139,42 +138,62 @@ user_reg_map_name_to_regnum (struct gdbarch *gdbarch, const char *name, /* Search the user name space. */ { struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data); - int reg; - for (reg = 0; reg < regs->nr; reg++) + struct user_reg *reg; + int nr; + for (nr = 0, reg = regs->first; reg != NULL; reg = reg->next, nr++) { - if ((len < 0 && strcmp (regs->user[reg].name, name)) - || (len == strlen (regs->user[reg].name) - && strncmp (regs->user[reg].name, name, len) == 0)) - return NUM_REGS + NUM_PSEUDO_REGS + reg; + if ((len < 0 && strcmp (reg->name, name)) + || (len == strlen (reg->name) + && strncmp (reg->name, name, len) == 0)) + return NUM_REGS + NUM_PSEUDO_REGS + nr; } } return -1; } +static struct user_reg * +usernum_to_user_reg (struct gdbarch *gdbarch, int usernum) +{ + struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data); + struct user_reg *reg; + for (reg = regs->first; reg != NULL; reg = reg->next) + { + if (usernum == 0) + return reg; + usernum--; + } + return NULL; +} + const char * user_reg_map_regnum_to_name (struct gdbarch *gdbarch, int regnum) { int maxregs = (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch)); - struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data); if (regnum < 0) return NULL; - if (regnum < maxregs) + else if (regnum < maxregs) return gdbarch_register_name (gdbarch, regnum); - if (regnum < (maxregs + regs->nr)) - return regs->user[regnum - maxregs].name; - return NULL; + else + { + struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs); + if (reg == NULL) + return NULL; + else + return reg->name; + } } struct value * value_of_user_reg (int regnum, struct frame_info *frame) { struct gdbarch *gdbarch = get_frame_arch (frame); - struct user_regs *regs = gdbarch_data (gdbarch, user_regs_data); - int reg = regnum - (NUM_REGS + NUM_PSEUDO_REGS); - gdb_assert (reg >= 0 && reg < regs->nr); - return regs->user[reg].read (frame); + int maxregs = (gdbarch_num_regs (gdbarch) + + gdbarch_num_pseudo_regs (gdbarch)); + struct user_reg *reg = usernum_to_user_reg (gdbarch, regnum - maxregs); + gdb_assert (reg != NULL); + return reg->read (frame); } extern initialize_file_ftype _initialize_user_regs; /* -Wmissing-prototypes */ @@ -182,5 +201,5 @@ extern initialize_file_ftype _initialize_user_regs; /* -Wmissing-prototypes */ void _initialize_user_regs (void) { - user_regs_data = register_gdbarch_data (user_regs_init, user_regs_free); + user_regs_data = register_gdbarch_data (user_regs_init, NULL); }