diff options
Diffstat (limited to 'gdb/arm-linux-tdep.c')
| -rw-r--r-- | gdb/arm-linux-tdep.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index b7ff5ecdb46..b5b56de9710 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -33,6 +33,7 @@ #include "trad-frame.h" #include "tramp-frame.h" #include "breakpoint.h" +#include "auxv.h" #include "arm-tdep.h" #include "arm-linux-tdep.h" @@ -45,6 +46,9 @@ #include "gdb_string.h" +/* This is defined in <elf.h> on ARM GNU/Linux systems. */ +#define AT_HWCAP 16 + extern int arm_apcs_32; /* Under ARM GNU/Linux the traditional way of performing a breakpoint @@ -638,6 +642,44 @@ arm_linux_collect_nwfpe (const struct regset *regset, regs + INT_REGISTER_SIZE * ARM_FPS_REGNUM); } +/* Support VFP register format. */ + +#define ARM_LINUX_SIZEOF_VFP (32 * 8 + 4) + +static void +arm_linux_supply_vfp (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *regs_buf, size_t len) +{ + const gdb_byte *regs = regs_buf; + int regno; + + if (regnum == ARM_FPSCR_REGNUM || regnum == -1) + regcache_raw_supply (regcache, ARM_FPSCR_REGNUM, regs + 32 * 8); + + for (regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++) + if (regnum == -1 || regnum == regno) + regcache_raw_supply (regcache, regno, + regs + (regno - ARM_D0_REGNUM) * 8); +} + +static void +arm_linux_collect_vfp (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *regs_buf, size_t len) +{ + gdb_byte *regs = regs_buf; + int regno; + + if (regnum == ARM_FPSCR_REGNUM || regnum == -1) + regcache_raw_collect (regcache, ARM_FPSCR_REGNUM, regs + 32 * 8); + + for (regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++) + if (regnum == -1 || regnum == regno) + regcache_raw_collect (regcache, regno, + regs + (regno - ARM_D0_REGNUM) * 8); +} + /* Return the appropriate register set for the core section identified by SECT_NAME and SECT_SIZE. */ @@ -665,9 +707,62 @@ arm_linux_regset_from_core_section (struct gdbarch *gdbarch, return tdep->fpregset; } + if (strcmp (sect_name, ".reg-arm-vfp") == 0 + && sect_size == ARM_LINUX_SIZEOF_VFP) + { + if (tdep->vfpregset == NULL) + tdep->vfpregset = regset_alloc (gdbarch, arm_linux_supply_vfp, + arm_linux_collect_vfp); + return tdep->vfpregset; + } + + return NULL; +} + +/* Core file register set sections. */ + +static struct core_regset_section arm_linux_fpa_regset_sections[] = +{ + { ".reg", ARM_LINUX_SIZEOF_GREGSET, "general-purpose" }, + { ".reg2", ARM_LINUX_SIZEOF_NWFPE, "FPA floating-point" }, + { NULL, 0} +}; + +static struct core_regset_section arm_linux_vfp_regset_sections[] = +{ + { ".reg", ARM_LINUX_SIZEOF_GREGSET, "general-purpose" }, + { ".reg-arm-vfp", ARM_LINUX_SIZEOF_VFP, "VFP floating-point" }, + { NULL, 0} +}; + +/* Determine target description from core file. */ + +static const struct target_desc * +arm_linux_core_read_description (struct gdbarch *gdbarch, + struct target_ops *target, + bfd *abfd) +{ + CORE_ADDR arm_hwcap = 0; + + if (target_auxv_search (target, AT_HWCAP, &arm_hwcap) != 1) + return NULL; + + if (arm_hwcap & HWCAP_VFP) + { + /* NEON implies VFPv3-D32 or no-VFP unit. Say that we only support + Neon with VFPv3-D32. */ + if (arm_hwcap & HWCAP_NEON) + return tdesc_arm_with_neon; + else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3) + return tdesc_arm_with_vfpv3; + else + return tdesc_arm_with_vfpv2; + } + return NULL; } + /* Copy the value of next pc of sigreturn and rt_sigrturn into PC, return 1. In addition, set IS_THUMB depending on whether we will return to ARM or Thumb code. Return 0 if it is not a @@ -1036,6 +1131,12 @@ arm_linux_init_abi (struct gdbarch_info info, /* Core file support. */ set_gdbarch_regset_from_core_section (gdbarch, arm_linux_regset_from_core_section); + set_gdbarch_core_read_description (gdbarch, arm_linux_core_read_description); + + if (tdep->have_vfp_registers) + set_gdbarch_core_regset_sections (gdbarch, arm_linux_vfp_regset_sections); + else if (tdep->have_fpa_registers) + set_gdbarch_core_regset_sections (gdbarch, arm_linux_fpa_regset_sections); set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); |