diff options
| author | Sergey Bugaev <bugaevc@gmail.com> | 2023-05-09 00:31:15 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2023-05-10 02:35:50 +0200 |
| commit | 4c37060484c17619699ad67cd4d716c59bceef85 (patch) | |
| tree | cb83c5c6a38967d31d9faf7ca84717e9f890e9a3 | |
| parent | 6e5ad3f307307b87f87d1cc662ec1ea13ad4ade4 (diff) | |
elfcore: Add support for saving x86_64 registers
Message-Id: <20230508213136.608575-21-bugaevc@gmail.com>
| -rw-r--r-- | exec/elfcore.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/exec/elfcore.c b/exec/elfcore.c index ab6dc2ba..c6aa2bc8 100644 --- a/exec/elfcore.c +++ b/exec/elfcore.c @@ -23,6 +23,7 @@ #include <link.h> #include <string.h> #include <argz.h> +#include <error.h> #include <sys/mman.h> #include <sys/utsname.h> #include <sys/procfs.h> @@ -44,7 +45,76 @@ #include <mach/vm_param.h> #include <assert-backtrace.h> -#ifdef i386_THREAD_STATE +#ifdef __x86_64__ +# define ELF_MACHINE EM_X86_64 + +static inline void +fetch_thread_regset (thread_t thread, prgregset_t *gregs) +{ + error_t err; + struct i386_thread_state state; + mach_msg_type_number_t count = i386_THREAD_STATE_COUNT; + + memset (gregs, 0, sizeof (*gregs)); + + err = thread_get_state (thread, i386_THREAD_STATE, + (thread_state_t) &state, &count); + if (err) + { + error (0, err, "Failed to fetch thread state"); + return; + } + + assert_backtrace (count == i386_THREAD_STATE_COUNT); + + (*gregs)[REG_RAX] = state.rax; + (*gregs)[REG_RBX] = state.rbx; + (*gregs)[REG_RCX] = state.rcx; + (*gregs)[REG_RDX] = state.rdx; + + (*gregs)[REG_RDI] = state.rdi; + (*gregs)[REG_RSI] = state.rsi; + + (*gregs)[REG_RBP] = state.rbp; + (*gregs)[REG_RSP] = state.ursp; + (*gregs)[REG_RIP] = state.rip; + (*gregs)[REG_RFL] = state.rfl; + + (*gregs)[REG_R8] = state.r8; + (*gregs)[REG_R9] = state.r9; + (*gregs)[REG_R10] = state.r10; + (*gregs)[REG_R11] = state.r11; + (*gregs)[REG_R12] = state.r12; + (*gregs)[REG_R13] = state.r13; + (*gregs)[REG_R14] = state.r14; + (*gregs)[REG_R15] = state.r15; +} + +static inline void +fetch_thread_fpregset (thread_t thread, prfpregset_t *fpregs) +{ + error_t err; + struct i386_float_state st; + mach_msg_type_number_t count = i386_FLOAT_STATE_COUNT; + + memset (*fpregs, 0, sizeof (**fpregs)); + + err = thread_get_state (thread, i386_FLOAT_STATE, + (thread_state_t) &st, &count); + if (err) + { + error (0, err, "Failed to fetch thread state"); + return; + } + if (st.initialized) + { + _Static_assert (sizeof (**fpregs) >= sizeof (st.hw_state), + "Expected prfpregset_t to contain hw_state"); + memcpy (*fpregs, &st.hw_state, sizeof (st.hw_state)); + } +} + +#elif defined (i386_THREAD_STATE) # define ELF_MACHINE EM_386 /* The gregset_t format (compatible with Linux/x86) almost fits |