diff options
Diffstat (limited to 'tb/top/conspiracion.cpp')
| -rw-r--r-- | tb/top/conspiracion.cpp | 133 |
1 files changed, 72 insertions, 61 deletions
diff --git a/tb/top/conspiracion.cpp b/tb/top/conspiracion.cpp index f222e54..099baf3 100644 --- a/tb/top/conspiracion.cpp +++ b/tb/top/conspiracion.cpp @@ -1,4 +1,5 @@ #include <climits> +#include <csignal> #include <cstdio> #include <cstdint> #include <cstdlib> @@ -33,6 +34,8 @@ namespace { + volatile sig_atomic_t async_halt = 0; + constexpr const char *gp_regs[30] = { [0] = "r0", @@ -157,6 +160,11 @@ namespace return stream; } + + void async_halt_handler(int) + { + async_halt = 1; + } } int main(int argc, char **argv) @@ -381,7 +389,7 @@ int main(int argc, char **argv) tick(); tick(); - if(top.breakpoint) + if(top.breakpoint || (!(time & ((1 << 8) - 1)) && async_halt)) [[unlikely]] { top.halt = 1; } @@ -446,91 +454,94 @@ int main(int argc, char **argv) std::fputs("=== end-mem ===\n", ctrl); }; + std::signal(SIGUSR1, async_halt_handler); + unsigned i = 0; // Abuse unsigned overflow (cycles is UINT_MAX by default) while(!failed && i + 1 <= *cycles) { - for(; i + 1 <= *cycles; ++i) + do { cycle(); if(failed || top.cpu_halted) [[unlikely]] { - break; + goto halt_or_fail; } - } + } while(++i + 1 <= *cycles); - if(top.cpu_halted) - { - top.step = 0; - top.halt = 0; + break; - do_reg_dump(); - std::fputs("=== halted ===\n", ctrl); +halt_or_fail: + top.step = 0; + top.halt = 0; - char *line = nullptr; - std::size_t buf_size = 0; + do_reg_dump(); + std::fprintf(ctrl, "=== %s ===\n", failed ? "fault" : "halted"); + + char *line = nullptr; + std::size_t buf_size = 0; - while(true) + while(true) + { + ssize_t read = getline(&line, &buf_size, ctrl); + if(read == -1) { - ssize_t read = getline(&line, &buf_size, ctrl); - if(read == -1) + if(!std::feof(ctrl)) { - if(!std::feof(ctrl)) - { - std::perror("getline()"); - failed = true; - } - - break; + std::perror("getline()"); + failed = true; } - if(read > 0 && line[read - 1] == '\n') - { - line[read - 1] = '\0'; - } + break; + } - const char *cmd = std::strtok(line, " "); - if(!std::strcmp(cmd, "continue")) - { - break; - } else if(!std::strcmp(cmd, "step")) - { - top.step = 1; - break; - } else if(!std::strcmp(cmd, "dump-mem")) - { - mem_region dump = {}; - std::sscanf(std::strtok(nullptr, " "), "%zu", &dump.start); - std::sscanf(std::strtok(nullptr, " "), "%zu", &dump.length); - do_mem_dump(&dump, 1); - } else if(!std::strcmp(cmd, "patch-mem")) - { - std::uint32_t addr; - std::sscanf(std::strtok(nullptr, " "), "%u", &addr); + if(read > 0 && line[read - 1] == '\n') + { + line[read - 1] = '\0'; + } + + const char *cmd = std::strtok(line, " "); + if(!std::strcmp(cmd, "continue")) + { + break; + } else if(!std::strcmp(cmd, "step")) + { + top.step = 1; + break; + } else if(!std::strcmp(cmd, "dump-mem")) + { + mem_region dump = {}; + std::sscanf(std::strtok(nullptr, " "), "%zu", &dump.start); + std::sscanf(std::strtok(nullptr, " "), "%zu", &dump.length); + do_mem_dump(&dump, 1); + } else if(!std::strcmp(cmd, "patch-mem")) + { + std::uint32_t addr; + std::sscanf(std::strtok(nullptr, " "), "%u", &addr); - const char *data = std::strtok(nullptr, " "); - std::size_t length = std::strlen(data); + const char *data = std::strtok(nullptr, " "); + std::size_t length = std::strlen(data); - while(data && length >= 8) - { - std::uint32_t word; - std::sscanf(data, "%08x", &word); + while(data && length >= 8) + { + std::uint32_t word; + std::sscanf(data, "%08x", &word); - data += 8; - length -= 8; + data += 8; + length -= 8; - word = (word & 0xff) << 24 - | ((word >> 8) & 0xff) << 16 - | ((word >> 16) & 0xff) << 8 - | ((word >> 24) & 0xff); + word = (word & 0xff) << 24 + | ((word >> 8) & 0xff) << 16 + | ((word >> 16) & 0xff) << 8 + | ((word >> 24) & 0xff); - avl.patch(addr++, word); - } + avl.patch(addr++, word); } } - - std::free(line); } + + std::free(line); + async_halt = 0; } if(!no_tty) @@ -543,7 +554,7 @@ int main(int argc, char **argv) trace.close(); } - if(dump_regs || failed) + if(dump_regs) { do_reg_dump(); } |