diff options
Diffstat (limited to 'gdb/alpha-linux-tdep.c')
| -rw-r--r-- | gdb/alpha-linux-tdep.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c index be26a96..eff393a 100644 --- a/gdb/alpha-linux-tdep.c +++ b/gdb/alpha-linux-tdep.c @@ -21,9 +21,12 @@ #include "defs.h" #include "frame.h" #include "gdb_assert.h" +#include "gdb_string.h" #include "osabi.h" #include "solib-svr4.h" #include "symtab.h" +#include "regset.h" +#include "regcache.h" #include "alpha-tdep.h" @@ -125,6 +128,84 @@ alpha_linux_sigcontext_addr (struct frame_info *next_frame) return sp; } +/* Supply register REGNUM from the buffer specified by GREGS and LEN + in the general-purpose register set REGSET to register cache + REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ + +static void +alpha_linux_supply_gregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *gregs, size_t len) +{ + const gdb_byte *regs = gregs; + int i; + gdb_assert (len >= 32 * 8); + + for (i = 0; i < ALPHA_ZERO_REGNUM; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_supply (regcache, i, regs + i * 8); + } + + if (regnum == ALPHA_PC_REGNUM || regnum == -1) + regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8); + + if (regnum == ALPHA_UNIQUE_REGNUM || regnum == -1) + regcache_raw_supply (regcache, ALPHA_UNIQUE_REGNUM, + len >= 33 * 8 ? regs + 32 * 8 : NULL); +} + +/* Supply register REGNUM from the buffer specified by FPREGS and LEN + in the floating-point register set REGSET to register cache + REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ + +static void +alpha_linux_supply_fpregset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *fpregs, size_t len) +{ + const gdb_byte *regs = fpregs; + int i; + gdb_assert (len >= 32 * 8); + + for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++) + { + if (regnum == i || regnum == -1) + regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8); + } + + if (regnum == ALPHA_FPCR_REGNUM || regnum == -1) + regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 32 * 8); +} + +static struct regset alpha_linux_gregset = +{ + NULL, + alpha_linux_supply_gregset +}; + +static struct regset alpha_linux_fpregset = +{ + NULL, + alpha_linux_supply_fpregset +}; + +/* Return the appropriate register set for the core section identified + by SECT_NAME and SECT_SIZE. */ + +const struct regset * +alpha_linux_regset_from_core_section (struct gdbarch *gdbarch, + const char *sect_name, size_t sect_size) +{ + if (strcmp (sect_name, ".reg") == 0 && sect_size >= 32 * 8) + return &alpha_linux_gregset; + + if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 32 * 8) + return &alpha_linux_fpregset; + + return NULL; +} + static void alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { @@ -148,6 +229,9 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); + + set_gdbarch_regset_from_core_section + (gdbarch, alpha_linux_regset_from_core_section); } void |