diff options
Diffstat (limited to 'backends/riscv_regs.c')
| -rw-r--r-- | backends/riscv_regs.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/backends/riscv_regs.c b/backends/riscv_regs.c new file mode 100644 index 00000000..7b577ca0 --- /dev/null +++ b/backends/riscv_regs.c @@ -0,0 +1,177 @@ +/* Register names and numbers for RISC-V DWARF. + This file is part of elfutils. + + This file is free software; you can redistribute it and/or modify + it under the terms of either + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at + your option) any later version + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at + your option) any later version + + or both in parallel, as here. + + elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see <http://www.gnu.org/licenses/>. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <string.h> +#include <dwarf.h> + +#define BACKEND riscv_ +#include "libebl_CPU.h" + +ssize_t +riscv_register_info (Ebl *ebl, int regno, char *name, size_t namelen, + const char **prefix, const char **setname, + int *bits, int *type) +{ + if (name == NULL) + return 64; + + *prefix = ""; + + if (regno < 32) + { + *setname = "integer"; + *type = DW_ATE_signed; + *bits = ebl->class == ELFCLASS64 ? 64 : 32; + } + else + { + *setname = "FPU"; + *type = DW_ATE_float; + *bits = 64; + } + + switch (regno) + { + case 0: + return stpcpy (name, "zero") + 1 - name; + + case 1: + *type = DW_ATE_address; + return stpcpy (name, "ra") + 1 - name; + + case 2: + *type = DW_ATE_address; + return stpcpy (name, "sp") + 1 - name; + + case 3: + *type = DW_ATE_address; + return stpcpy (name, "gp") + 1 - name; + + case 4: + *type = DW_ATE_address; + return stpcpy (name, "tp") + 1 - name; + + case 5 ... 7: + name[0] = 't'; + name[1] = regno - 5 + '0'; + namelen = 2; + break; + + case 8 ... 9: + name[0] = 's'; + name[1] = regno - 8 + '0'; + namelen = 2; + break; + + case 10 ... 17: + name[0] = 'a'; + name[1] = regno - 10 + '0'; + namelen = 2; + break; + + case 18 ... 25: + name[0] = 's'; + name[1] = regno - 18 + '2'; + namelen = 2; + break; + + case 26 ... 27: + name[0] = 's'; + name[1] = '1'; + name[1] = regno - 26 + '0'; + namelen = 3; + break; + + case 28 ... 31: + name[0] = 't'; + name[1] = regno - 28 + '3'; + namelen = 2; + break; + + case 32 ... 39: + name[0] = 'f'; + name[1] = 't'; + name[2] = regno - 32 + '0'; + namelen = 3; + break; + + case 40 ... 41: + name[0] = 'f'; + name[1] = 's'; + name[2] = regno - 40 + '0'; + namelen = 3; + break; + + case 42 ... 49: + name[0] = 'f'; + name[1] = 'a'; + name[2] = regno - 42 + '0'; + namelen = 3; + break; + + case 50 ... 57: + name[0] = 'f'; + name[1] = 's'; + name[2] = regno - 50 + '2'; + namelen = 3; + break; + + case 58 ... 59: + name[0] = 'f'; + name[1] = 's'; + name[2] = '1'; + name[3] = regno - 58 + '0'; + namelen = 4; + break; + + case 60 ... 61: + name[0] = 'f'; + name[1] = 't'; + name[2] = regno - 60 + '8'; + namelen = 3; + break; + + case 62 ... 63: + name[0] = 'f'; + name[1] = 't'; + name[2] = '1'; + name[3] = regno - 62 + '0'; + namelen = 4; + break; + + default: + *setname = NULL; + return 0; + } + + name[namelen++] = '\0'; + return namelen; +} |