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* sparc-linux-tdep.c (PSR_SYSCALL): Define. 

(sparc_linux_write_pc): New function.
	(sparc32_linux_init_abi): Register it.
	* sparc64-linux-tdep.c (TSTATE_SYSCALL): Define.
	(sparc64_linux_write_pc): New function.
	(sparc64_linux_init_abi): Register it.
This commit is contained in:
David S. Miller 2008-05-11 22:10:30 +00:00
parent 87a7da84fb
commit e8467b5ac5
3 changed files with 63 additions and 0 deletions
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7
gdb/ChangeLog
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@ -1,5 +1,12 @@
2008-05-11 David S. Miller <davem@davemloft.net>
* sparc-linux-tdep.c (PSR_SYSCALL): Define.
(sparc_linux_write_pc): New function.
(sparc32_linux_init_abi): Register it.
* sparc64-linux-tdep.c (TSTATE_SYSCALL): Define.
(sparc64_linux_write_pc): New function.
(sparc64_linux_init_abi): Register it.
* sparc-linux-tdep.c, sparc64-linux-tdep.c: Use
dwarf2_append_unwinders(), not dwarf2_frame_sniffer.

28
gdb/sparc-linux-tdep.c
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@ -211,6 +211,32 @@ sparc32_linux_collect_core_fpregset (const struct regset *regset,
sparc32_collect_fpregset (regcache, regnum, fpregs);
}
/* Set the program counter for process PTID to PC. */
#define PSR_SYSCALL 0x00004000
static void
sparc_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
ULONGEST psr;
regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4);
/* Clear the "in syscall" bit to prevent the kernel from
messing with the PCs we just installed, if we happen to be
within an interrupted system call that the kernel wants to
restart.
Note that after we return from the dummy call, the PSR et al.
registers will be automatically restored, and the kernel
continues to restart the system call at this point. */
regcache_cooked_read_unsigned (regcache, SPARC32_PSR_REGNUM, &psr);
psr &= ~PSR_SYSCALL;
regcache_cooked_write_unsigned (regcache, SPARC32_PSR_REGNUM, psr);
}
static void
@ -251,6 +277,8 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Hook in the DWARF CFI frame unwinder. */
dwarf2_append_unwinders (gdbarch);
set_gdbarch_write_pc (gdbarch, sparc_linux_write_pc);
}
/* Provide a prototype to silence -Wmissing-prototypes. */

28
gdb/sparc64-linux-tdep.c
View File

@ -174,6 +174,32 @@ sparc64_linux_collect_core_fpregset (const struct regset *regset,
sparc64_collect_fpregset (regcache, regnum, fpregs);
}
/* Set the program counter for process PTID to PC. */
#define TSTATE_SYSCALL 0x0000000000000020ULL
static void
sparc64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
ULONGEST state;
regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4);
/* Clear the "in syscall" bit to prevent the kernel from
messing with the PCs we just installed, if we happen to be
within an interrupted system call that the kernel wants to
restart.
Note that after we return from the dummy call, the TSTATE et al.
registers will be automatically restored, and the kernel
continues to restart the system call at this point. */
regcache_cooked_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state);
state &= ~TSTATE_SYSCALL;
regcache_cooked_write_unsigned (regcache, SPARC64_STATE_REGNUM, state);
}
static void
@ -211,6 +237,8 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Make sure we can single-step over signal return system calls. */
tdep->step_trap = sparc64_linux_step_trap;
set_gdbarch_write_pc (gdbarch, sparc64_linux_write_pc);
}