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| author | Daniel Jacobowitz <drow@false.org> | 2003-02-04 18:21:29 +0000 |
|---|---|---|
| committer | Daniel Jacobowitz <drow@false.org> | 2003-02-04 18:21:29 +0000 |
| commit | a2d356b075ff182a07472b87a4dd65a2fa372c0c (patch) | |
| tree | 134a7cf9f68d71ce30ded66376385dbceace1694 /gdb/ppc-linux-tdep.c | |
| parent | 2de7ced7074964728e66d7a71af0d4fb28f28fa9 (diff) | |
| download | gdb-a2d356b075ff182a07472b87a4dd65a2fa372c0c.zip gdb-a2d356b075ff182a07472b87a4dd65a2fa372c0c.tar.gz gdb-a2d356b075ff182a07472b87a4dd65a2fa372c0c.tar.bz2 | |
Pointed out by Anton Blanchard <anton@samba.org>.
* ppc-linux-tdep.c (insn_is_sigreturn): New function.
(ppc_linux_at_sigtramp_return_path): Use it.
Diffstat (limited to 'gdb/ppc-linux-tdep.c')
| -rw-r--r-- | gdb/ppc-linux-tdep.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c index c118cf4..3677d9f 100644 --- a/gdb/ppc-linux-tdep.c +++ b/gdb/ppc-linux-tdep.c @@ -36,10 +36,15 @@ #include "solib-svr4.h" #include "ppc-tdep.h" -/* The following two instructions are used in the signal trampoline - code on GNU/Linux PPC. */ -#define INSTR_LI_R0_0x7777 0x38007777 -#define INSTR_SC 0x44000002 +/* The following instructions are used in the signal trampoline code + on GNU/Linux PPC. The kernel used to use magic syscalls 0x6666 and + 0x7777 but now uses the sigreturn syscalls. We check for both. */ +#define INSTR_LI_R0_0x6666 0x38006666 +#define INSTR_LI_R0_0x7777 0x38007777 +#define INSTR_LI_R0_NR_sigreturn 0x38000077 +#define INSTR_LI_R0_NR_rt_sigreturn 0x380000AC + +#define INSTR_SC 0x44000002 /* Since the *-tdep.c files are platform independent (i.e, they may be used to build cross platform debuggers), we can't include system @@ -183,6 +188,21 @@ ppc_linux_in_sigtramp (CORE_ADDR pc, char *func_name) return (pc == handler || pc == handler + 4); } +static inline int +insn_is_sigreturn (unsigned long pcinsn) +{ + switch(pcinsn) + { + case INSTR_LI_R0_0x6666: + case INSTR_LI_R0_0x7777: + case INSTR_LI_R0_NR_sigreturn: + case INSTR_LI_R0_NR_rt_sigreturn: + return 1; + default: + return 0; + } +} + /* * The signal handler trampoline is on the stack and consists of exactly * two instructions. The easiest and most accurate way of determining @@ -202,11 +222,11 @@ ppc_linux_at_sigtramp_return_path (CORE_ADDR pc) pcinsn = extract_unsigned_integer (buf + 4, 4); return ( - (pcinsn == INSTR_LI_R0_0x7777 + (insn_is_sigreturn (pcinsn) && extract_unsigned_integer (buf + 8, 4) == INSTR_SC) || (pcinsn == INSTR_SC - && extract_unsigned_integer (buf, 4) == INSTR_LI_R0_0x7777)); + && insn_is_sigreturn (extract_unsigned_integer (buf, 4)))); } CORE_ADDR |